Nodes OpenShift Dedicated 4 OpenShift Dedicated Nodes Red Hat OpenShift Documentation Team

Commands:
kind: Pod apiVersion: v1 metadata: name: example labels: environment: production app: abc 1 spec: restartPolicy: Always 2 securityContext: 3 runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: 4 - name: abc args: - sleep - "1000000" volumeMounts: 5 - name: cache-volume mountPath: /cache 6 image: registry.access.redhat.com/ubi7/ubi-init:latest 7 securityContext: allowPrivilegeEscalation: false runAsNonRoot: true capabilities: drop: ["ALL"] resources: limits: memory: "100Mi" cpu: "1" requests: memory: "100Mi" cpu: "1" volumes: 8 - name: cache-volume emptyDir: sizeLimit: 500Mi
oc project <project-name>
oc get pods
oc get pods
NAME READY STATUS RESTARTS AGE console-698d866b78-bnshf 1/1 Running 2 165m console-698d866b78-m87pm 1/1 Running 2 165m
oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE console-698d866b78-bnshf 1/1 Running 2 166m 10.128.0.24 ip-10-0-152-71.ec2.internal <none> console-698d866b78-m87pm 1/1 Running 2 166m 10.129.0.23 ip-10-0-173-237.ec2.internal <none>
oc adm top pods
oc adm top pods -n openshift-console
NAME CPU(cores) MEMORY(bytes) console-7f58c69899-q8c8k 0m 22Mi console-7f58c69899-xhbgg 0m 25Mi downloads-594fcccf94-bcxk8 3m 18Mi downloads-594fcccf94-kv4p6 2m 15Mi
oc adm top pod --selector=''
oc adm top pod --selector='name=my-pod'
oc logs -f <pod_name> -c <container_name>
oc logs ruby-58cd97df55-mww7r
oc logs -f ruby-57f7f4855b-znl92 -c ruby
oc logs <object_type>/<resource_name> 1
oc logs deployment/ruby
{ "kind": "Pod", "spec": { "containers": [ { "image": "openshift/hello-openshift", "name": "hello-openshift" } ] }, "apiVersion": "v1", "metadata": { "name": "iperf-slow", "annotations": { "kubernetes.io/ingress-bandwidth": "10M", "kubernetes.io/egress-bandwidth": "10M" } } }
oc create -f <file_or_dir_path>
oc get poddisruptionbudget --all-namespaces
NAMESPACE NAME MIN AVAILABLE MAX UNAVAILABLE ALLOWED DISRUPTIONS AGE openshift-apiserver openshift-apiserver-pdb N/A 1 1 121m openshift-cloud-controller-manager aws-cloud-controller-manager 1 N/A 1 125m openshift-cloud-credential-operator pod-identity-webhook 1 N/A 1 117m openshift-cluster-csi-drivers aws-ebs-csi-driver-controller-pdb N/A 1 1 121m openshift-cluster-storage-operator csi-snapshot-controller-pdb N/A 1 1 122m openshift-cluster-storage-operator csi-snapshot-webhook-pdb N/A 1 1 122m openshift-console console N/A 1 1 116m #
apiVersion: policy/v1 1 kind: PodDisruptionBudget metadata: name: my-pdb spec: minAvailable: 2 2 selector: 3 matchLabels: name: my-pod
apiVersion: policy/v1 1 kind: PodDisruptionBudget metadata: name: my-pdb spec: maxUnavailable: 25% 2 selector: 3 matchLabels: name: my-pod
oc create -f </path/to/file> -n <project_name>
apiVersion: v1 kind: Secret metadata: name: test-secret namespace: my-namespace type: Opaque 1 data: 2 username: <username> 3 password: <password> stringData: 4 hostname: myapp.mydomain.com 5
apiVersion: v1 kind: Secret metadata: name: test-secret type: Opaque 1 data: 2 username: <username> password: <password> stringData: 3 hostname: myapp.mydomain.com secret.properties: | property1=valueA property2=valueB
apiVersion: v1 kind: ServiceAccount secrets: - name: test-secret
apiVersion: v1 kind: Pod metadata: name: secret-example-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: secret-test-container image: busybox command: [ "/bin/sh", "-c", "cat /etc/secret-volume/*" ] volumeMounts: 1 - name: secret-volume mountPath: /etc/secret-volume 2 readOnly: true 3 securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: secret-volume secret: secretName: test-secret 4 restartPolicy: Never
apiVersion: v1 kind: Pod metadata: name: secret-example-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: secret-test-container image: busybox command: [ "/bin/sh", "-c", "export" ] env: - name: TEST_SECRET_USERNAME_ENV_VAR valueFrom: secretKeyRef: 1 name: test-secret key: username securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
apiVersion: build.openshift.io/v1 kind: BuildConfig metadata: name: secret-example-bc spec: strategy: sourceStrategy: env: - name: TEST_SECRET_USERNAME_ENV_VAR valueFrom: secretKeyRef: 1 name: test-secret key: username from: kind: ImageStreamTag namespace: openshift name: 'cli:latest'
apiVersion: v1 kind: Secret metadata: name: mysecret type: Opaque 1 data: username: <username> password: <password>
oc create -f <filename>.yaml
apiVersion: v1 kind: Secret metadata: name: secret-sa-sample annotations: kubernetes.io/service-account.name: "sa-name" 1 type: kubernetes.io/service-account-token 2
oc create -f <filename>.yaml
apiVersion: v1 kind: Secret metadata: name: secret-basic-auth type: kubernetes.io/basic-auth 1 data: stringData: 2 username: admin password: <password>
oc create -f <filename>.yaml
apiVersion: v1 kind: Secret metadata: name: secret-ssh-auth type: kubernetes.io/ssh-auth 1 data: ssh-privatekey: | 2 MIIEpQIBAAKCAQEAulqb/Y
oc create -f <filename>.yaml
apiVersion: v1 kind: Secret metadata: name: secret-docker-cfg namespace: my-project type: kubernetes.io/dockerconfig 1 data: .dockerconfig:bm5ubm5ubm5ubm5ubm5ubm5ubm5ubmdnZ2dnZ2dnZ2dnZ2dnZ2dnZ2cgYXV0aCBrZXlzCg== 2
apiVersion: v1 kind: Secret metadata: name: secret-docker-json namespace: my-project type: kubernetes.io/dockerconfig 1 data: .dockerconfigjson:bm5ubm5ubm5ubm5ubm5ubm5ubm5ubmdnZ2dnZ2dnZ2dnZ2dnZ2dnZ2cgYXV0aCBrZXlzCg== 2
oc create -f <filename>.yaml
apiVersion: v1 kind: Secret metadata: name: example namespace: <namespace> type: Opaque 1 data: username: <base64 encoded username> password: <base64 encoded password> stringData: 2 hostname: myapp.mydomain.com
oc create sa <service_account_name> -n <your_namespace>
apiVersion: v1 kind: Secret metadata: name: <secret_name> 1 annotations: kubernetes.io/service-account.name: "sa-name" 2 type: kubernetes.io/service-account-token 3
oc apply -f service-account-token-secret.yaml
oc get secret <sa_token_secret> -o jsonpath='{.data.token}' | base64 --decode 1
ayJhbGciOiJSUzI1NiIsImtpZCI6IklOb2dtck1qZ3hCSWpoNnh5YnZhSE9QMkk3YnRZMVZoclFfQTZfRFp1YlUifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJkZWZhdWx0Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZWNyZXQubmFtZSI6ImJ1aWxkZXItdG9rZW4tdHZrbnIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC5uYW1lIjoiYnVpbGRlciIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjNmZGU2MGZmLTA1NGYtNDkyZi04YzhjLTNlZjE0NDk3MmFmNyIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDpkZWZhdWx0OmJ1aWxkZXIifQ.OmqFTDuMHC_lYvvEUrjr1x453hlEEHYcxS9VKSzmRkP1SiVZWPNPkTWlfNRp6bIUZD3U6aN3N7dMSN0eI5hu36xPgpKTdvuckKLTCnelMx6cxOdAbrcw1mCmOClNscwjS1KO1kzMtYnnq8rXHiMJELsNlhnRyyIXRTtNBsy4t64T3283s3SLsancyx0gy0ujx-Ch3uKAKdZi5iT-I8jnnQ-ds5THDs2h65RJhgglQEmSxpHrLGZFmyHAQI-_SjvmHZPXEc482x3SkaQHNLqpmrpJorNqh1M8ZHKzlujhZgVooMvJmWPXTb2vnvi3DGn2XI-hZxl1yD2yGH1RBpYUHA
curl -X GET <openshift_cluster_api> --header "Authorization: Bearer <token>" 1 2
apiVersion: v1 kind: Service metadata: name: registry annotations: service.beta.openshift.io/serving-cert-secret-name: registry-cert 1
kind: Service apiVersion: v1 metadata: name: my-service annotations: service.beta.openshift.io/serving-cert-secret-name: my-cert 1 spec: selector: app: MyApp ports: - protocol: TCP port: 80 targetPort: 9376
oc create -f <file-name>.yaml
oc get secrets
NAME TYPE DATA AGE my-cert kubernetes.io/tls 2 9m
oc describe secret my-cert
Name: my-cert Namespace: openshift-console Labels: <none> Annotations: service.beta.openshift.io/expiry: 2023-03-08T23:22:40Z service.beta.openshift.io/originating-service-name: my-service service.beta.openshift.io/originating-service-uid: 640f0ec3-afc2-4380-bf31-a8c784846a11 service.beta.openshift.io/expiry: 2023-03-08T23:22:40Z Type: kubernetes.io/tls Data ==== tls.key: 1679 bytes tls.crt: 2595 bytes
apiVersion: v1 kind: Pod metadata: name: my-service-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: mypod image: redis volumeMounts: - name: my-container mountPath: "/etc/my-path" securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: my-volume secret: secretName: my-cert items: - key: username path: my-group/my-username mode: 511
secret/ssl-key references serviceUID 62ad25ca-d703-11e6-9d6f-0e9c0057b608, which does not match 77b6dd80-d716-11e6-9d6f-0e9c0057b60
oc delete secret <secret_name>
oc annotate service <service_name> service.beta.openshift.io/serving-cert-generation-error-
oc annotate service <service_name> service.beta.openshift.io/serving-cert-generation-error-num-
kind: ConfigMap apiVersion: v1 metadata: creationTimestamp: 2016-02-18T19:14:38Z name: example-config namespace: my-namespace data: 1 example.property.1: hello example.property.2: world example.property.file: |- property.1=value-1 property.2=value-2 property.3=value-3 binaryData: bar: L3Jvb3QvMTAw 2
oc create configmap <configmap_name> [options]
oc create configmap game-config --from-file=example-files/
oc describe configmaps game-config
Name: game-config Namespace: default Labels: <none> Annotations: <none> Data game.properties: 158 bytes ui.properties: 83 bytes
cat example-files/game.properties
enemies=aliens lives=3 enemies.cheat=true enemies.cheat.level=noGoodRotten secret.code.passphrase=UUDDLRLRBABAS secret.code.allowed=true secret.code.lives=30
cat example-files/ui.properties
color.good=purple color.bad=yellow allow.textmode=true how.nice.to.look=fairlyNice
oc create configmap game-config --from-file=example-files/
oc get configmaps game-config -o yaml
apiVersion: v1 data: game.properties: |- enemies=aliens lives=3 enemies.cheat=true enemies.cheat.level=noGoodRotten secret.code.passphrase=UUDDLRLRBABAS secret.code.allowed=true secret.code.lives=30 ui.properties: | color.good=purple color.bad=yellow allow.textmode=true how.nice.to.look=fairlyNice kind: ConfigMap metadata: creationTimestamp: 2016-02-18T18:34:05Z name: game-config namespace: default resourceVersion: "407" selflink: /api/v1/namespaces/default/configmaps/game-config uid: 30944725-d66e-11e5-8cd0-68f728db1985
oc create configmap game-config-3 --from-file=game-special-key=example-files/game.properties
cat example-files/game.properties
enemies=aliens lives=3 enemies.cheat=true enemies.cheat.level=noGoodRotten secret.code.passphrase=UUDDLRLRBABAS secret.code.allowed=true secret.code.lives=30
cat example-files/ui.properties
color.good=purple color.bad=yellow allow.textmode=true how.nice.to.look=fairlyNice
oc create configmap game-config-2 --from-file=example-files/game.properties --from-file=example-files/ui.properties
oc create configmap game-config-3 --from-file=game-special-key=example-files/game.properties
oc get configmaps game-config-2 -o yaml
apiVersion: v1 data: game.properties: |- enemies=aliens lives=3 enemies.cheat=true enemies.cheat.level=noGoodRotten secret.code.passphrase=UUDDLRLRBABAS secret.code.allowed=true secret.code.lives=30 ui.properties: | color.good=purple color.bad=yellow allow.textmode=true how.nice.to.look=fairlyNice kind: ConfigMap metadata: creationTimestamp: 2016-02-18T18:52:05Z name: game-config-2 namespace: default resourceVersion: "516" selflink: /api/v1/namespaces/default/configmaps/game-config-2 uid: b4952dc3-d670-11e5-8cd0-68f728db1985
oc get configmaps game-config-3 -o yaml
apiVersion: v1 data: game-special-key: |- 1 enemies=aliens lives=3 enemies.cheat=true enemies.cheat.level=noGoodRotten secret.code.passphrase=UUDDLRLRBABAS secret.code.allowed=true secret.code.lives=30 kind: ConfigMap metadata: creationTimestamp: 2016-02-18T18:54:22Z name: game-config-3 namespace: default resourceVersion: "530" selflink: /api/v1/namespaces/default/configmaps/game-config-3 uid: 05f8da22-d671-11e5-8cd0-68f728db1985
oc create configmap special-config --from-literal=special.how=very --from-literal=special.type=charm
oc get configmaps special-config -o yaml
apiVersion: v1 data: special.how: very special.type: charm kind: ConfigMap metadata: creationTimestamp: 2016-02-18T19:14:38Z name: special-config namespace: default resourceVersion: "651" selflink: /api/v1/namespaces/default/configmaps/special-config uid: dadce046-d673-11e5-8cd0-68f728db1985
apiVersion: v1 kind: ConfigMap metadata: name: special-config 1 namespace: default 2 data: special.how: very 3 special.type: charm 4
apiVersion: v1 kind: ConfigMap metadata: name: env-config 1 namespace: default data: log_level: INFO 2
apiVersion: v1 kind: Pod metadata: name: dapi-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: 1 - name: SPECIAL_LEVEL_KEY 2 valueFrom: configMapKeyRef: name: special-config 3 key: special.how 4 - name: SPECIAL_TYPE_KEY valueFrom: configMapKeyRef: name: special-config 5 key: special.type 6 optional: true 7 envFrom: 8 - configMapRef: name: env-config 9 securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
SPECIAL_LEVEL_KEY=very log_level=INFO
apiVersion: v1 kind: ConfigMap metadata: name: special-config namespace: default data: special.how: very special.type: charm
apiVersion: v1 kind: Pod metadata: name: dapi-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "echo USD(SPECIAL_LEVEL_KEY) USD(SPECIAL_TYPE_KEY)" ] 1 env: - name: SPECIAL_LEVEL_KEY valueFrom: configMapKeyRef: name: special-config key: special.how - name: SPECIAL_TYPE_KEY valueFrom: configMapKeyRef: name: special-config key: special.type securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
very charm
apiVersion: v1 kind: ConfigMap metadata: name: special-config namespace: default data: special.how: very special.type: charm
apiVersion: v1 kind: Pod metadata: name: dapi-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "cat", "/etc/config/special.how" ] volumeMounts: - name: config-volume mountPath: /etc/config securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: config-volume configMap: name: special-config 1 restartPolicy: Never
very
apiVersion: v1 kind: Pod metadata: name: dapi-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "cat", "/etc/config/path/to/special-key" ] volumeMounts: - name: config-volume mountPath: /etc/config securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: config-volume configMap: name: special-config items: - key: special.how path: path/to/special-key 1 restartPolicy: Never
very
oc get priorityclasses
NAME VALUE GLOBAL-DEFAULT AGE system-node-critical 2000001000 false 72m system-cluster-critical 2000000000 false 72m openshift-user-critical 1000000000 false 3d13h cluster-logging 1000000 false 29s
apiVersion: v1 kind: Pod metadata: name: nginx labels: env: test spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent priorityClassName: system-cluster-critical 1
oc create -f <file-name>.yaml
oc describe pod router-default-66d5cf9464-7pwkc
kind: Pod apiVersion: v1 metadata: Name: router-default-66d5cf9464-7pwkc Namespace: openshift-ingress Controlled By: ReplicaSet/router-default-66d5cf9464
apiVersion: v1 kind: Pod metadata: name: router-default-66d5cf9464-7pwkc ownerReferences: - apiVersion: apps/v1 kind: ReplicaSet name: router-default-66d5cf9464 uid: d81dd094-da26-11e9-a48a-128e7edf0312 controller: true blockOwnerDeletion: true
kind: ReplicaSet apiVersion: apps/v1 metadata: name: hello-node-6fbccf8d9 spec: template: metadata: creationTimestamp: null labels: ingresscontroller.operator.openshift.io/deployment-ingresscontroller: default pod-template-hash: 66d5cf9464 spec: nodeSelector: kubernetes.io/os: linux node-role.kubernetes.io/worker: '' type: user-node 1
apiVersion: v1 kind: Pod metadata: name: hello-node-6fbccf8d9 spec: nodeSelector: region: east type: user-node
oc delete crd scaledobjects.keda.k8s.io
oc delete crd triggerauthentications.keda.k8s.io
oc create configmap -n openshift-keda thanos-cert --from-file=ca-cert.pem
oc get all -n keda
NAME READY STATUS RESTARTS AGE pod/custom-metrics-autoscaler-operator-5fd8d9ffd8-xt4xp 1/1 Running 0 18m NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/custom-metrics-autoscaler-operator 1/1 1 1 18m NAME DESIRED CURRENT READY AGE replicaset.apps/custom-metrics-autoscaler-operator-5fd8d9ffd8 1 1 1 18m
kind: KedaController apiVersion: keda.sh/v1alpha1 metadata: name: keda namespace: keda spec: watchNamespace: '' 1 operator: logLevel: info 2 logEncoder: console 3 caConfigMaps: 4 - thanos-cert - kafka-cert metricsServer: logLevel: '0' 5 auditConfig: 6 logFormat: "json" logOutputVolumeClaim: "persistentVolumeClaimName" policy: rules: - level: Metadata omitStages: ["RequestReceived"] omitManagedFields: false lifetime: maxAge: "2" maxBackup: "1" maxSize: "50" serviceAccount: {}
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: prom-scaledobject namespace: my-namespace spec: triggers: - type: prometheus 1 metadata: serverAddress: https://thanos-querier.openshift-monitoring.svc.cluster.local:9092 2 namespace: kedatest 3 metricName: http_requests_total 4 threshold: '5' 5 query: sum(rate(http_requests_total{job="test-app"}[1m])) 6 authModes: basic 7 cortexOrgID: my-org 8 ignoreNullValues: "false" 9 unsafeSsl: "false" 10
oc project <project_name> 1
oc create serviceaccount thanos 1
apiVersion: v1 kind: Secret metadata: name: thanos-token annotations: kubernetes.io/service-account.name: thanos 1 type: kubernetes.io/service-account-token
oc create -f <file_name>.yaml
oc describe serviceaccount thanos 1
Name: thanos Namespace: <namespace_name> Labels: <none> Annotations: <none> Image pull secrets: thanos-dockercfg-nnwgj Mountable secrets: thanos-dockercfg-nnwgj Tokens: thanos-token 1 Events: <none>
apiVersion: keda.sh/v1alpha1 kind: <authentication_method> 1 metadata: name: keda-trigger-auth-prometheus spec: secretTargetRef: 2 - parameter: bearerToken 3 name: thanos-token 4 key: token 5 - parameter: ca name: thanos-token key: ca.crt
oc create -f <file-name>.yaml
apiVersion: rbac.authorization.k8s.io/v1 kind: Role metadata: name: thanos-metrics-reader rules: - apiGroups: - "" resources: - pods verbs: - get - apiGroups: - metrics.k8s.io resources: - pods - nodes verbs: - get - list - watch
oc create -f <file-name>.yaml
apiVersion: rbac.authorization.k8s.io/v1 kind: <binding_type> 1 metadata: name: thanos-metrics-reader 2 namespace: my-project 3 roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: thanos-metrics-reader subjects: - kind: ServiceAccount name: thanos 4 namespace: <namespace_name> 5
oc create -f <file-name>.yaml
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: cpu-scaledobject namespace: my-namespace spec: triggers: - type: cpu 1 metricType: Utilization 2 metadata: value: '60' 3 minReplicaCount: 1 4
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: memory-scaledobject namespace: my-namespace spec: triggers: - type: memory 1 metricType: Utilization 2 metadata: value: '60' 3 containerName: api 4
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: kafka-scaledobject namespace: my-namespace spec: triggers: - type: kafka 1 metadata: topic: my-topic 2 bootstrapServers: my-cluster-kafka-bootstrap.openshift-operators.svc:9092 3 consumerGroup: my-group 4 lagThreshold: '10' 5 activationLagThreshold: '5' 6 offsetResetPolicy: latest 7 allowIdleConsumers: true 8 scaleToZeroOnInvalidOffset: false 9 excludePersistentLag: false 10 version: '1.0.0' 11 partitionLimitation: '1,2,10-20,31' 12 tls: enable 13
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: cron-scaledobject namespace: default spec: scaleTargetRef: name: my-deployment minReplicaCount: 0 1 maxReplicaCount: 100 2 cooldownPeriod: 300 triggers: - type: cron 3 metadata: timezone: Asia/Kolkata 4 start: "0 6 * * *" 5 end: "30 18 * * *" 6 desiredReplicas: "100" 7
apiVersion: v1 kind: Secret metadata: name: my-basic-secret namespace: default data: username: "dXNlcm5hbWU=" 1 password: "cGFzc3dvcmQ="
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: secret-triggerauthentication namespace: my-namespace 1 spec: secretTargetRef: 2 - parameter: username 3 name: my-basic-secret 4 key: username 5 - parameter: password name: my-basic-secret key: password
kind: ClusterTriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: 1 name: secret-cluster-triggerauthentication spec: secretTargetRef: 2 - parameter: username 3 name: my-basic-secret 4 key: username 5 - parameter: password name: my-basic-secret key: password
apiVersion: v1 kind: Secret metadata: name: my-secret namespace: my-namespace data: ca-cert.pem: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0... 1 client-cert.pem: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0... 2 client-key.pem: LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0t
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: secret-triggerauthentication namespace: my-namespace 1 spec: secretTargetRef: 2 - parameter: key 3 name: my-secret 4 key: client-key.pem 5 - parameter: ca 6 name: my-secret 7 key: ca-cert.pem 8
apiVersion: v1 kind: Secret metadata: name: my-secret namespace: my-namespace data: bearerToken: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXV" 1
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: token-triggerauthentication namespace: my-namespace 1 spec: secretTargetRef: 2 - parameter: bearerToken 3 name: my-secret 4 key: bearerToken 5
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: env-var-triggerauthentication namespace: my-namespace 1 spec: env: 2 - parameter: access_key 3 name: ACCESS_KEY 4 containerName: my-container 5
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: pod-id-triggerauthentication namespace: my-namespace 1 spec: podIdentity: 2 provider: aws-eks 3
apiVersion: v1 kind: Secret metadata: name: my-secret data: user-name: <base64_USER_NAME> password: <base64_USER_PASSWORD>
kind: TriggerAuthentication apiVersion: keda.sh/v1alpha1 metadata: name: prom-triggerauthentication namespace: my-namespace spec: secretTargetRef: - parameter: user-name name: my-secret key: USER_NAME - parameter: password name: my-secret key: USER_PASSWORD
oc create -f <filename>.yaml
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: scaledobject namespace: my-namespace spec: scaleTargetRef: name: example-deployment maxReplicaCount: 100 minReplicaCount: 0 pollingInterval: 30 triggers: - type: prometheus metadata: serverAddress: https://thanos-querier.openshift-monitoring.svc.cluster.local:9092 namespace: kedatest # replace <NAMESPACE> metricName: http_requests_total threshold: '5' query: sum(rate(http_requests_total{job="test-app"}[1m])) authModes: "basic" authenticationRef: name: prom-triggerauthentication 1 kind: TriggerAuthentication 2
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: name: scaledobject namespace: my-namespace spec: scaleTargetRef: name: example-deployment maxReplicaCount: 100 minReplicaCount: 0 pollingInterval: 30 triggers: - type: prometheus metadata: serverAddress: https://thanos-querier.openshift-monitoring.svc.cluster.local:9092 namespace: kedatest # replace <NAMESPACE> metricName: http_requests_total threshold: '5' query: sum(rate(http_requests_total{job="test-app"}[1m])) authModes: "basic" authenticationRef: name: prom-cluster-triggerauthentication 1 kind: ClusterTriggerAuthentication 2
oc apply -f <filename>
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: annotations: autoscaling.keda.sh/paused-replicas: "4"
oc edit ScaledObject scaledobject
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: annotations: autoscaling.keda.sh/paused-replicas: "4" 1 creationTimestamp: "2023-02-08T14:41:01Z" generation: 1 name: scaledobject namespace: my-project resourceVersion: '65729' uid: f5aec682-acdf-4232-a783-58b5b82f5dd0
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: annotations: autoscaling.keda.sh/paused-replicas: "4"
oc edit ScaledObject scaledobject
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: annotations: autoscaling.keda.sh/paused-replicas: "4" 1 creationTimestamp: "2023-02-08T14:41:01Z" generation: 1 name: scaledobject namespace: my-project resourceVersion: '65729' uid: f5aec682-acdf-4232-a783-58b5b82f5dd0
kind: KedaController apiVersion: keda.sh/v1alpha1 metadata: name: keda namespace: keda spec: metricsServer: auditConfig: logFormat: "json" 1 logOutputVolumeClaim: "pvc-audit-log" 2 policy: rules: 3 - level: Metadata omitStages: "RequestReceived" 4 omitManagedFields: false 5 lifetime: 6 maxAge: "2" maxBackup: "1" maxSize: "50"
get pod -n keda
NAME READY STATUS RESTARTS AGE custom-metrics-autoscaler-operator-5cb44cd75d-9v4lv 1/1 Running 0 8m20s keda-metrics-apiserver-65c7cc44fd-rrl4r 1/1 Running 0 2m55s keda-operator-776cbb6768-zpj5b 1/1 Running 0 2m55s
oc logs keda-metrics-apiserver-<hash>|grep -i metadata 1
oc logs keda-metrics-apiserver-65c7cc44fd-rrl4r|grep -i metadata
{"kind":"Event","apiVersion":"audit.k8s.io/v1","level":"Metadata","auditID":"4c81d41b-3dab-4675-90ce-20b87ce24013","stage":"ResponseComplete","requestURI":"/healthz","verb":"get","user":{"username":"system:anonymous","groups":["system:unauthenticated"]},"sourceIPs":["10.131.0.1"],"userAgent":"kube-probe/1.28","responseStatus":{"metadata":{},"code":200},"requestReceivedTimestamp":"2023-02-16T13:00:03.554567Z","stageTimestamp":"2023-02-16T13:00:03.555032Z","annotations":{"authorization.k8s.io/decision":"allow","authorization.k8s.io/reason":""}}
oc rsh pod/keda-metrics-apiserver-<hash> -n keda
oc rsh pod/keda-metrics-apiserver-65c7cc44fd-rrl4r -n keda
sh-4.4USD cd /var/audit-policy/
sh-4.4USD ls
log-2023.02.17-14:50 policy.yaml
sh-4.4USD cat <log_name>/<pvc_name>|grep -i <log_level> 1
sh-4.4USD cat log-2023.02.17-14:50/pvc-audit-log|grep -i Request
{"kind":"Event","apiVersion":"audit.k8s.io/v1","level":"Request","auditID":"63e7f68c-04ec-4f4d-8749-bf1656572a41","stage":"ResponseComplete","requestURI":"/openapi/v2","verb":"get","user":{"username":"system:aggregator","groups":["system:authenticated"]},"sourceIPs":["10.128.0.1"],"responseStatus":{"metadata":{},"code":304},"requestReceivedTimestamp":"2023-02-17T13:12:55.035478Z","stageTimestamp":"2023-02-17T13:12:55.038346Z","annotations":{"authorization.k8s.io/decision":"allow","authorization.k8s.io/reason":"RBAC: allowed by ClusterRoleBinding \"system:discovery\" of ClusterRole \"system:discovery\" to Group \"system:authenticated\""}}
oc adm must-gather --image="USD(oc get packagemanifests openshift-custom-metrics-autoscaler-operator -n openshift-marketplace -o jsonpath='{.status.channels[?(@.name=="stable")].currentCSVDesc.annotations.containerImage}')"
oc adm must-gather --image="USD(oc get packagemanifests openshift-custom-metrics-autoscaler-operator -n openshift-marketplace -o jsonpath='{.status.channels[?(@.name=="stable")].currentCSVDesc.annotations.containerImage}')"
IMAGE="USD(oc get packagemanifests openshift-custom-metrics-autoscaler-operator -n openshift-marketplace -o jsonpath='{.status.channels[?(@.name=="stable")].currentCSVDesc.annotations.containerImage}')"
oc adm must-gather --image-stream=openshift/must-gather --image=USD{IMAGE}
└── keda ├── apps │ ├── daemonsets.yaml │ ├── deployments.yaml │ ├── replicasets.yaml │ └── statefulsets.yaml ├── apps.openshift.io │ └── deploymentconfigs.yaml ├── autoscaling │ └── horizontalpodautoscalers.yaml ├── batch │ ├── cronjobs.yaml │ └── jobs.yaml ├── build.openshift.io │ ├── buildconfigs.yaml │ └── builds.yaml ├── core │ ├── configmaps.yaml │ ├── endpoints.yaml │ ├── events.yaml │ ├── persistentvolumeclaims.yaml │ ├── pods.yaml │ ├── replicationcontrollers.yaml │ ├── secrets.yaml │ └── services.yaml ├── discovery.k8s.io │ └── endpointslices.yaml ├── image.openshift.io │ └── imagestreams.yaml ├── k8s.ovn.org │ ├── egressfirewalls.yaml │ └── egressqoses.yaml ├── keda.sh │ ├── kedacontrollers │ │ └── keda.yaml │ ├── scaledobjects │ │ └── example-scaledobject.yaml │ └── triggerauthentications │ └── example-triggerauthentication.yaml ├── monitoring.coreos.com │ └── servicemonitors.yaml ├── networking.k8s.io │ └── networkpolicies.yaml ├── keda.yaml ├── pods │ ├── custom-metrics-autoscaler-operator-58bd9f458-ptgwx │ │ ├── custom-metrics-autoscaler-operator │ │ │ └── custom-metrics-autoscaler-operator │ │ │ └── logs │ │ │ ├── current.log │ │ │ ├── previous.insecure.log │ │ │ └── previous.log │ │ └── custom-metrics-autoscaler-operator-58bd9f458-ptgwx.yaml │ ├── custom-metrics-autoscaler-operator-58bd9f458-thbsh │ │ └── custom-metrics-autoscaler-operator │ │ └── custom-metrics-autoscaler-operator │ │ └── logs │ ├── keda-metrics-apiserver-65c7cc44fd-6wq4g │ │ ├── keda-metrics-apiserver │ │ │ └── keda-metrics-apiserver │ │ │ └── logs │ │ │ ├── current.log │ │ │ ├── previous.insecure.log │ │ │ └── previous.log │ │ └── keda-metrics-apiserver-65c7cc44fd-6wq4g.yaml │ └── keda-operator-776cbb6768-fb6m5 │ ├── keda-operator │ │ └── keda-operator │ │ └── logs │ │ ├── current.log │ │ ├── previous.insecure.log │ │ └── previous.log │ └── keda-operator-776cbb6768-fb6m5.yaml ├── policy │ └── poddisruptionbudgets.yaml └── route.openshift.io └── routes.yaml
tar cvaf must-gather.tar.gz must-gather.local.5421342344627712289/ 1
oc describe PodMetrics openshift-kube-scheduler-ip-10-0-135-131.ec2.internal
Name: openshift-kube-scheduler-ip-10-0-135-131.ec2.internal Namespace: openshift-kube-scheduler Labels: <none> Annotations: <none> API Version: metrics.k8s.io/v1beta1 Containers: Name: wait-for-host-port Usage: Memory: 0 Name: scheduler Usage: Cpu: 8m Memory: 45440Ki Kind: PodMetrics Metadata: Creation Timestamp: 2019-05-23T18:47:56Z Self Link: /apis/metrics.k8s.io/v1beta1/namespaces/openshift-kube-scheduler/pods/openshift-kube-scheduler-ip-10-0-135-131.ec2.internal Timestamp: 2019-05-23T18:47:56Z Window: 1m0s Events: <none>
apiVersion: v1 kind: Pod spec: containers: - name: app image: images.my-company.example/app:v4 resources: limits: memory: "128Mi" cpu: "500m"
apiVersion: keda.sh/v1alpha1 kind: ScaledObject metadata: annotations: autoscaling.keda.sh/paused-replicas: "0" 1 name: scaledobject 2 namespace: my-namespace spec: scaleTargetRef: apiVersion: apps/v1 3 name: example-deployment 4 kind: Deployment 5 envSourceContainerName: .spec.template.spec.containers[0] 6 cooldownPeriod: 200 7 maxReplicaCount: 100 8 minReplicaCount: 0 9 metricsServer: 10 auditConfig: logFormat: "json" logOutputVolumeClaim: "persistentVolumeClaimName" policy: rules: - level: Metadata omitStages: "RequestReceived" omitManagedFields: false lifetime: maxAge: "2" maxBackup: "1" maxSize: "50" fallback: 11 failureThreshold: 3 replicas: 6 pollingInterval: 30 12 advanced: restoreToOriginalReplicaCount: false 13 horizontalPodAutoscalerConfig: name: keda-hpa-scale-down 14 behavior: 15 scaleDown: stabilizationWindowSeconds: 300 policies: - type: Percent value: 100 periodSeconds: 15 triggers: - type: prometheus 16 metadata: serverAddress: https://thanos-querier.openshift-monitoring.svc.cluster.local:9092 namespace: kedatest metricName: http_requests_total threshold: '5' query: sum(rate(http_requests_total{job="test-app"}[1m])) authModes: basic authenticationRef: 17 name: prom-triggerauthentication kind: TriggerAuthentication
oc create -f <filename>.yaml
oc get scaledobject <scaled_object_name>
NAME SCALETARGETKIND SCALETARGETNAME MIN MAX TRIGGERS AUTHENTICATION READY ACTIVE FALLBACK AGE scaledobject apps/v1.Deployment example-deployment 0 50 prometheus prom-triggerauthentication True True True 17s
oc delete crd clustertriggerauthentications.keda.sh kedacontrollers.keda.sh scaledjobs.keda.sh scaledobjects.keda.sh triggerauthentications.keda.sh
oc get clusterrole | grep keda.sh
oc delete clusterrole.keda.sh-v1alpha1-admin
oc get clusterrolebinding | grep keda.sh
oc delete clusterrolebinding.keda.sh-v1alpha1-admin
oc delete project keda
oc delete operator/openshift-custom-metrics-autoscaler-operator.keda
apiVersion: v1 kind: Pod metadata: name: with-pod-affinity spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: podAffinity: 1 requiredDuringSchedulingIgnoredDuringExecution: 2 - labelSelector: matchExpressions: - key: security 3 operator: In 4 values: - S1 5 topologyKey: topology.kubernetes.io/zone containers: - name: with-pod-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: with-pod-antiaffinity spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: podAntiAffinity: 1 preferredDuringSchedulingIgnoredDuringExecution: 2 - weight: 100 3 podAffinityTerm: labelSelector: matchExpressions: - key: security 4 operator: In 5 values: - S2 topologyKey: kubernetes.io/hostname containers: - name: with-pod-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: security-s1 labels: security: S1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: security-s1 image: docker.io/ocpqe/hello-pod securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault
oc create -f <pod-spec>.yaml
apiVersion: v1 kind: Pod metadata: name: security-s1-east spec: affinity: 1 podAffinity: requiredDuringSchedulingIgnoredDuringExecution: 2 - labelSelector: matchExpressions: - key: security 3 values: - S1 operator: In 4 topologyKey: topology.kubernetes.io/zone 5
oc create -f <pod-spec>.yaml
apiVersion: v1 kind: Pod metadata: name: security-s1 labels: security: S1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: security-s1 image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
oc create -f <pod-spec>.yaml
apiVersion: v1 kind: Pod metadata: name: security-s2-east spec: affinity: 1 podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: 2 - weight: 100 3 podAffinityTerm: labelSelector: matchExpressions: - key: security 4 values: - S1 operator: In 5 topologyKey: kubernetes.io/hostname 6
oc create -f <pod-spec>.yaml
apiVersion: v1 kind: Pod metadata: name: team4 labels: team: "4" spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: ocp image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: team4a spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: podAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: team operator: In values: - "4" topologyKey: kubernetes.io/hostname containers: - name: pod-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: pod-s1 labels: security: s1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: ocp image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: pod-s2 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: podAntiAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: security operator: In values: - s1 topologyKey: kubernetes.io/hostname containers: - name: pod-antiaffinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: pod-s1 labels: security: s1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: ocp image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: pod-s2 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: podAffinity: requiredDuringSchedulingIgnoredDuringExecution: - labelSelector: matchExpressions: - key: security operator: In values: - s2 topologyKey: kubernetes.io/hostname containers: - name: pod-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
NAME READY STATUS RESTARTS AGE IP NODE pod-s2 0/1 Pending 0 32s <none>
apiVersion: v1 kind: Pod metadata: name: with-node-affinity spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: nodeAffinity: 1 requiredDuringSchedulingIgnoredDuringExecution: 2 nodeSelectorTerms: - matchExpressions: - key: e2e-az-NorthSouth 3 operator: In 4 values: - e2e-az-North 5 - e2e-az-South 6 containers: - name: with-node-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: with-node-affinity spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault affinity: nodeAffinity: 1 preferredDuringSchedulingIgnoredDuringExecution: 2 - weight: 1 3 preference: matchExpressions: - key: e2e-az-EastWest 4 operator: In 5 values: - e2e-az-East 6 - e2e-az-West 7 containers: - name: with-node-affinity image: docker.io/ocpqe/hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
apiVersion: v1 kind: Pod metadata: name: s1 spec: affinity: 1 nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: 2 nodeSelectorTerms: - matchExpressions: - key: e2e-az-name 3 values: - e2e-az1 - e2e-az2 operator: In 4 #
oc create -f <file-name>.yaml
apiVersion: v1 kind: Pod metadata: name: s1 spec: affinity: 1 nodeAffinity: preferredDuringSchedulingIgnoredDuringExecution: 2 - weight: 3 preference: matchExpressions: - key: e2e-az-name 4 values: - e2e-az3 operator: In 5 #
oc create -f <file-name>.yaml
oc label node node1 zone=us
kind: Node apiVersion: v1 metadata: name: <node_name> labels: zone: us #
cat pod-s1.yaml
apiVersion: v1 kind: Pod metadata: name: pod-s1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - image: "docker.io/ocpqe/hello-pod" name: hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: "zone" operator: In values: - us #
oc get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE pod-s1 1/1 Running 0 4m IP1 node1
oc label node node1 zone=emea
kind: Node apiVersion: v1 metadata: name: <node_name> labels: zone: emea #
cat pod-s1.yaml
apiVersion: v1 kind: Pod metadata: name: pod-s1 spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - image: "docker.io/ocpqe/hello-pod" name: hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: "zone" operator: In values: - us #
oc describe pod pod-s1
Events: FirstSeen LastSeen Count From SubObjectPath Type Reason --------- -------- ----- ---- ------------- -------- ------ 1m 33s 8 default-scheduler Warning FailedScheduling No nodes are available that match all of the following predicates:: MatchNodeSelector (1).
sysctl -a |grep commit
# vm.overcommit_memory = 0 #
sysctl -a |grep panic
# vm.panic_on_oom = 0 #
kind: Node apiVersion: v1 metadata: name: ip-10-0-131-14.ec2.internal selfLink: /api/v1/nodes/ip-10-0-131-14.ec2.internal uid: 7bc2580a-8b8e-11e9-8e01-021ab4174c74 resourceVersion: '478704' creationTimestamp: '2019-06-10T14:46:08Z' labels: kubernetes.io/os: linux topology.kubernetes.io/zone: us-east-1a node.openshift.io/os_version: '4.5' node-role.kubernetes.io/worker: '' topology.kubernetes.io/region: us-east-1 node.openshift.io/os_id: rhcos node.kubernetes.io/instance-type: m4.large kubernetes.io/hostname: ip-10-0-131-14 kubernetes.io/arch: amd64 region: east 1 type: user-node #
apiVersion: v1 kind: Pod metadata: name: s1 # spec: nodeSelector: 1 region: east type: user-node #
apiVersion: config.openshift.io/v1 kind: Scheduler metadata: name: cluster # spec: defaultNodeSelector: type=user-node,region=east #
apiVersion: v1 kind: Node metadata: name: ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4 # labels: region: east type: user-node #
apiVersion: v1 kind: Pod metadata: name: s1 # spec: nodeSelector: region: east #
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES pod-s1 1/1 Running 0 20s 10.131.2.6 ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4 <none> <none>
apiVersion: v1 kind: Namespace metadata: name: east-region annotations: openshift.io/node-selector: "region=east" #
apiVersion: v1 kind: Node metadata: name: ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4 # labels: region: east type: user-node #
apiVersion: v1 kind: Pod metadata: namespace: east-region # spec: nodeSelector: region: east type: user-node #
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES pod-s1 1/1 Running 0 20s 10.131.2.6 ci-ln-qg1il3k-f76d1-hlmhl-worker-b-df2s4 <none> <none>
apiVersion: v1 kind: Pod metadata: name: west-region # spec: nodeSelector: region: west #
oc describe pod router-default-66d5cf9464-7pwkc
kind: Pod apiVersion: v1 metadata: Name: router-default-66d5cf9464-7pwkc Namespace: openshift-ingress Controlled By: ReplicaSet/router-default-66d5cf9464
apiVersion: v1 kind: Pod metadata: name: router-default-66d5cf9464-7pwkc ownerReferences: - apiVersion: apps/v1 kind: ReplicaSet name: router-default-66d5cf9464 uid: d81dd094-da26-11e9-a48a-128e7edf0312 controller: true blockOwnerDeletion: true
kind: ReplicaSet apiVersion: apps/v1 metadata: name: hello-node-6fbccf8d9 spec: template: metadata: creationTimestamp: null labels: ingresscontroller.operator.openshift.io/deployment-ingresscontroller: default pod-template-hash: 66d5cf9464 spec: nodeSelector: kubernetes.io/os: linux node-role.kubernetes.io/worker: '' type: user-node 1
apiVersion: v1 kind: Pod metadata: name: hello-node-6fbccf8d9 spec: nodeSelector: region: east type: user-node
apiVersion: v1 kind: Pod metadata: name: my-pod labels: region: us-east spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault topologySpreadConstraints: - maxSkew: 1 1 topologyKey: topology.kubernetes.io/zone 2 whenUnsatisfiable: DoNotSchedule 3 labelSelector: 4 matchLabels: region: us-east 5 matchLabelKeys: - my-pod-label 6 containers: - image: "docker.io/ocpqe/hello-pod" name: hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
kind: Pod apiVersion: v1 metadata: name: my-pod labels: region: us-east spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault topologySpreadConstraints: - maxSkew: 1 topologyKey: topology.kubernetes.io/zone whenUnsatisfiable: DoNotSchedule labelSelector: matchLabels: region: us-east containers: - image: "docker.io/ocpqe/hello-pod" name: hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
kind: Pod apiVersion: v1 metadata: name: my-pod-2 labels: region: us-east spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault topologySpreadConstraints: - maxSkew: 1 topologyKey: node whenUnsatisfiable: DoNotSchedule labelSelector: matchLabels: region: us-east - maxSkew: 1 topologyKey: rack whenUnsatisfiable: DoNotSchedule labelSelector: matchLabels: region: us-east containers: - image: "docker.io/ocpqe/hello-pod" name: hello-pod securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
kind: Pod apiVersion: v1 metadata: name: hello-node-6fbccf8d9-9tmzr # spec: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchFields: - key: metadata.name operator: In values: - target-host-name #
oc patch namespace myproject -p '{"metadata": {"annotations": {"openshift.io/node-selector": ""}}}'
apiVersion: v1 kind: Namespace metadata: name: <namespace> annotations: openshift.io/node-selector: '' #
apiVersion: apps/v1 kind: DaemonSet metadata: name: hello-daemonset spec: selector: matchLabels: name: hello-daemonset 1 template: metadata: labels: name: hello-daemonset 2 spec: nodeSelector: 3 role: worker containers: - image: openshift/hello-openshift imagePullPolicy: Always name: registry ports: - containerPort: 80 protocol: TCP resources: {} terminationMessagePath: /dev/termination-log serviceAccount: default terminationGracePeriodSeconds: 10 #
oc create -f daemonset.yaml
oc get pods
hello-daemonset-cx6md 1/1 Running 0 2m hello-daemonset-e3md9 1/1 Running 0 2m
oc describe pod/hello-daemonset-cx6md|grep Node
Node: openshift-node01.hostname.com/10.14.20.134
oc describe pod/hello-daemonset-e3md9|grep Node
Node: openshift-node02.hostname.com/10.14.20.137
apiVersion: batch/v1 kind: Job metadata: name: pi spec: parallelism: 1 1 completions: 1 2 activeDeadlineSeconds: 1800 3 backoffLimit: 6 4 template: 5 metadata: name: pi spec: containers: - name: pi image: perl command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] restartPolicy: OnFailure 6 #
apiVersion: batch/v1 kind: Job metadata: name: pi spec: parallelism: 1 1 completions: 1 2 activeDeadlineSeconds: 1800 3 backoffLimit: 6 4 template: 5 metadata: name: pi spec: containers: - name: pi image: perl command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] restartPolicy: OnFailure 6 #
oc create -f <file-name>.yaml
oc create job pi --image=perl -- perl -Mbignum=bpi -wle 'print bpi(2000)'
apiVersion: batch/v1 kind: CronJob metadata: name: pi spec: schedule: "*/1 * * * *" 1 concurrencyPolicy: "Replace" 2 startingDeadlineSeconds: 200 3 suspend: true 4 successfulJobsHistoryLimit: 3 5 failedJobsHistoryLimit: 1 6 jobTemplate: 7 spec: template: metadata: labels: 8 parent: "cronjobpi" spec: containers: - name: pi image: perl command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] restartPolicy: OnFailure 9
oc create -f <file-name>.yaml
oc create cronjob pi --image=perl --schedule='*/1 * * * *' -- perl -Mbignum=bpi -wle 'print bpi(2000)'
oc get nodes
oc get nodes
NAME STATUS ROLES AGE VERSION master.example.com Ready master 7h v1.31.3 node1.example.com Ready worker 7h v1.31.3 node2.example.com Ready worker 7h v1.31.3
oc get nodes
NAME STATUS ROLES AGE VERSION master.example.com Ready master 7h v1.31.3 node1.example.com NotReady,SchedulingDisabled worker 7h v1.31.3 node2.example.com Ready worker 7h v1.31.3
oc get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME master.example.com Ready master 171m v1.31.3 10.0.129.108 <none> Red Hat Enterprise Linux CoreOS 48.83.202103210901-0 (Ootpa) 4.18.0-240.15.1.el8_3.x86_64 cri-o://1.31.3-30.rhaos4.10.gitf2f339d.el8-dev node1.example.com Ready worker 72m v1.31.3 10.0.129.222 <none> Red Hat Enterprise Linux CoreOS 48.83.202103210901-0 (Ootpa) 4.18.0-240.15.1.el8_3.x86_64 cri-o://1.31.3-30.rhaos4.10.gitf2f339d.el8-dev node2.example.com Ready worker 164m v1.31.3 10.0.142.150 <none> Red Hat Enterprise Linux CoreOS 48.83.202103210901-0 (Ootpa) 4.18.0-240.15.1.el8_3.x86_64 cri-o://1.31.3-30.rhaos4.10.gitf2f339d.el8-dev
oc get node <node>
oc get node node1.example.com
NAME STATUS ROLES AGE VERSION node1.example.com Ready worker 7h v1.31.3
oc describe node <node>
oc describe node node1.example.com
Name: node1.example.com 1 Roles: worker 2 Labels: kubernetes.io/os=linux kubernetes.io/hostname=ip-10-0-131-14 kubernetes.io/arch=amd64 3 node-role.kubernetes.io/worker= node.kubernetes.io/instance-type=m4.large node.openshift.io/os_id=rhcos node.openshift.io/os_version=4.5 region=east topology.kubernetes.io/region=us-east-1 topology.kubernetes.io/zone=us-east-1a Annotations: cluster.k8s.io/machine: openshift-machine-api/ahardin-worker-us-east-2a-q5dzc 4 machineconfiguration.openshift.io/currentConfig: worker-309c228e8b3a92e2235edd544c62fea8 machineconfiguration.openshift.io/desiredConfig: worker-309c228e8b3a92e2235edd544c62fea8 machineconfiguration.openshift.io/state: Done volumes.kubernetes.io/controller-managed-attach-detach: true CreationTimestamp: Wed, 13 Feb 2019 11:05:57 -0500 Taints: <none> 5 Unschedulable: false Conditions: 6 Type Status LastHeartbeatTime LastTransitionTime Reason Message ---- ------ ----------------- ------------------ ------ ------- OutOfDisk False Wed, 13 Feb 2019 15:09:42 -0500 Wed, 13 Feb 2019 11:05:57 -0500 KubeletHasSufficientDisk kubelet has sufficient disk space available MemoryPressure False Wed, 13 Feb 2019 15:09:42 -0500 Wed, 13 Feb 2019 11:05:57 -0500 KubeletHasSufficientMemory kubelet has sufficient memory available DiskPressure False Wed, 13 Feb 2019 15:09:42 -0500 Wed, 13 Feb 2019 11:05:57 -0500 KubeletHasNoDiskPressure kubelet has no disk pressure PIDPressure False Wed, 13 Feb 2019 15:09:42 -0500 Wed, 13 Feb 2019 11:05:57 -0500 KubeletHasSufficientPID kubelet has sufficient PID available Ready True Wed, 13 Feb 2019 15:09:42 -0500 Wed, 13 Feb 2019 11:07:09 -0500 KubeletReady kubelet is posting ready status Addresses: 7 InternalIP: 10.0.140.16 InternalDNS: ip-10-0-140-16.us-east-2.compute.internal Hostname: ip-10-0-140-16.us-east-2.compute.internal Capacity: 8 attachable-volumes-aws-ebs: 39 cpu: 2 hugepages-1Gi: 0 hugepages-2Mi: 0 memory: 8172516Ki pods: 250 Allocatable: attachable-volumes-aws-ebs: 39 cpu: 1500m hugepages-1Gi: 0 hugepages-2Mi: 0 memory: 7558116Ki pods: 250 System Info: 9 Machine ID: 63787c9534c24fde9a0cde35c13f1f66 System UUID: EC22BF97-A006-4A58-6AF8-0A38DEEA122A Boot ID: f24ad37d-2594-46b4-8830-7f7555918325 Kernel Version: 3.10.0-957.5.1.el7.x86_64 OS Image: Red Hat Enterprise Linux CoreOS 410.8.20190520.0 (Ootpa) Operating System: linux Architecture: amd64 Container Runtime Version: cri-o://1.31.3-0.6.dev.rhaos4.3.git9ad059b.el8-rc2 Kubelet Version: v1.31.3 Kube-Proxy Version: v1.31.3 PodCIDR: 10.128.4.0/24 ProviderID: aws:///us-east-2a/i-04e87b31dc6b3e171 Non-terminated Pods: (12 in total) 10 Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits --------- ---- ------------ ---------- --------------- ------------- openshift-cluster-node-tuning-operator tuned-hdl5q 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-dns dns-default-l69zr 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-image-registry node-ca-9hmcg 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-ingress router-default-76455c45c-c5ptv 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-machine-config-operator machine-config-daemon-cvqw9 20m (1%) 0 (0%) 50Mi (0%) 0 (0%) openshift-marketplace community-operators-f67fh 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-monitoring alertmanager-main-0 50m (3%) 50m (3%) 210Mi (2%) 10Mi (0%) openshift-monitoring node-exporter-l7q8d 10m (0%) 20m (1%) 20Mi (0%) 40Mi (0%) openshift-monitoring prometheus-adapter-75d769c874-hvb85 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-multus multus-kw8w5 0 (0%) 0 (0%) 0 (0%) 0 (0%) openshift-ovn-kubernetes ovnkube-node-t4dsn 80m (0%) 0 (0%) 1630Mi (0%) 0 (0%) Allocated resources: (Total limits may be over 100 percent, i.e., overcommitted.) Resource Requests Limits -------- -------- ------ cpu 380m (25%) 270m (18%) memory 880Mi (11%) 250Mi (3%) attachable-volumes-aws-ebs 0 0 Events: 11 Type Reason Age From Message ---- ------ ---- ---- ------- Normal NodeHasSufficientPID 6d (x5 over 6d) kubelet, m01.example.com Node m01.example.com status is now: NodeHasSufficientPID Normal NodeAllocatableEnforced 6d kubelet, m01.example.com Updated Node Allocatable limit across pods Normal NodeHasSufficientMemory 6d (x6 over 6d) kubelet, m01.example.com Node m01.example.com status is now: NodeHasSufficientMemory Normal NodeHasNoDiskPressure 6d (x6 over 6d) kubelet, m01.example.com Node m01.example.com status is now: NodeHasNoDiskPressure Normal NodeHasSufficientDisk 6d (x6 over 6d) kubelet, m01.example.com Node m01.example.com status is now: NodeHasSufficientDisk Normal NodeHasSufficientPID 6d kubelet, m01.example.com Node m01.example.com status is now: NodeHasSufficientPID Normal Starting 6d kubelet, m01.example.com Starting kubelet. #
oc get pod --selector=<nodeSelector>
oc get pod --selector=kubernetes.io/os
oc get pod -l=<nodeSelector>
oc get pod -l kubernetes.io/os=linux
oc get pod --all-namespaces --field-selector=spec.nodeName=<nodename>
oc adm top nodes
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% ip-10-0-12-143.ec2.compute.internal 1503m 100% 4533Mi 61% ip-10-0-132-16.ec2.compute.internal 76m 5% 1391Mi 18% ip-10-0-140-137.ec2.compute.internal 398m 26% 2473Mi 33% ip-10-0-142-44.ec2.compute.internal 656m 43% 6119Mi 82% ip-10-0-146-165.ec2.compute.internal 188m 12% 3367Mi 45% ip-10-0-19-62.ec2.compute.internal 896m 59% 5754Mi 77% ip-10-0-44-193.ec2.compute.internal 632m 42% 5349Mi 72%
oc adm top node --selector=''
get tuned.tuned.openshift.io/default -o yaml -n openshift-cluster-node-tuning-operator
profile: - name: tuned_profile_1 data: | # TuneD profile specification [main] summary=Description of tuned_profile_1 profile [sysctl] net.ipv4.ip_forward=1 # ... other sysctl's or other TuneD daemon plugins supported by the containerized TuneD - name: tuned_profile_n data: | # TuneD profile specification [main] summary=Description of tuned_profile_n profile # tuned_profile_n profile settings
recommend: <recommend-item-1> <recommend-item-n>
- machineConfigLabels: 1 <mcLabels> 2 match: 3 <match> 4 priority: <priority> 5 profile: <tuned_profile_name> 6 operand: 7 debug: <bool> 8 tunedConfig: reapply_sysctl: <bool> 9
- label: <label_name> 1 value: <label_value> 2 type: <label_type> 3 <match> 4
- match: - label: tuned.openshift.io/elasticsearch match: - label: node-role.kubernetes.io/master - label: node-role.kubernetes.io/infra type: pod priority: 10 profile: openshift-control-plane-es - match: - label: node-role.kubernetes.io/master - label: node-role.kubernetes.io/infra priority: 20 profile: openshift-control-plane - priority: 30 profile: openshift-node
apiVersion: tuned.openshift.io/v1 kind: Tuned metadata: name: openshift-node-custom namespace: openshift-cluster-node-tuning-operator spec: profile: - data: | [main] summary=Custom OpenShift node profile with an additional kernel parameter include=openshift-node [bootloader] cmdline_openshift_node_custom=+skew_tick=1 name: openshift-node-custom recommend: - machineConfigLabels: machineconfiguration.openshift.io/role: "worker-custom" priority: 20 profile: openshift-node-custom
apiVersion: tuned.openshift.io/v1 kind: Tuned metadata: name: provider-gce namespace: openshift-cluster-node-tuning-operator spec: profile: - data: | [main] summary=GCE Cloud provider-specific profile # Your tuning for GCE Cloud provider goes here. name: provider-gce
apiVersion: tuned.openshift.io/v1 kind: Tuned metadata: name: default namespace: openshift-cluster-node-tuning-operator spec: profile: - data: | [main] summary=Optimize systems running OpenShift (provider specific parent profile) include=-provider-USD{f:exec:cat:/var/lib/ocp-tuned/provider},openshift name: openshift recommend: - profile: openshift-control-plane priority: 30 match: - label: node-role.kubernetes.io/master - label: node-role.kubernetes.io/infra - profile: openshift-node priority: 40
oc exec USDtuned_pod -n openshift-cluster-node-tuning-operator -- find /usr/lib/tuned/openshift{,-control-plane,-node} -name tuned.conf -exec grep -H ^ {} \;
USD(nproc) X 1/2 MiB
for i in {1..100}; do sleep 1; if dig myservice; then exit 0; fi; done; exit 1
curl -X POST http://USDMANAGEMENT_SERVICE_HOST:USDMANAGEMENT_SERVICE_PORT/register -d 'instance=USD()&ip=USD()'
apiVersion: v1 kind: Pod metadata: name: myapp-pod labels: app: myapp spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: myapp-container image: registry.access.redhat.com/ubi9/ubi:latest command: ['sh', '-c', 'echo The app is running! && sleep 3600'] securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] initContainers: - name: init-myservice image: registry.access.redhat.com/ubi9/ubi:latest command: ['sh', '-c', 'until getent hosts myservice; do echo waiting for myservice; sleep 2; done;'] securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] - name: init-mydb image: registry.access.redhat.com/ubi9/ubi:latest command: ['sh', '-c', 'until getent hosts mydb; do echo waiting for mydb; sleep 2; done;'] securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
oc create -f myapp.yaml
oc get pods
NAME READY STATUS RESTARTS AGE myapp-pod 0/1 Init:0/2 0 5s
kind: Service apiVersion: v1 metadata: name: myservice spec: ports: - protocol: TCP port: 80 targetPort: 9376
oc create -f myservice.yaml
oc get pods
NAME READY STATUS RESTARTS AGE myapp-pod 0/1 Init:1/2 0 5s
kind: Service apiVersion: v1 metadata: name: mydb spec: ports: - protocol: TCP port: 80 targetPort: 9377
oc create -f mydb.yaml
oc get pods
NAME READY STATUS RESTARTS AGE myapp-pod 1/1 Running 0 2m
oc set volume <object_selection> <operation> <mandatory_parameters> <options>
oc set volume <object_type>/<name> [options]
oc set volume pod/p1
oc set volume dc --all --name=v1
oc set volume <object_type>/<name> --add [options]
oc set volume dc/registry --add
kind: DeploymentConfig apiVersion: apps.openshift.io/v1 metadata: name: registry namespace: registry spec: replicas: 3 selector: app: httpd template: metadata: labels: app: httpd spec: volumes: 1 - name: volume-pppsw emptyDir: {} containers: - name: httpd image: >- image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest ports: - containerPort: 8080 protocol: TCP
oc set volume rc/r1 --add --name=v1 --type=secret --secret-name='secret1' --mount-path=/data
kind: ReplicationController apiVersion: v1 metadata: name: example-1 namespace: example spec: replicas: 0 selector: app: httpd deployment: example-1 deploymentconfig: example template: metadata: creationTimestamp: null labels: app: httpd deployment: example-1 deploymentconfig: example spec: volumes: 1 - name: v1 secret: secretName: secret1 defaultMode: 420 containers: - name: httpd image: >- image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest volumeMounts: 2 - name: v1 mountPath: /data
oc set volume -f dc.json --add --name=v1 --type=persistentVolumeClaim --claim-name=pvc1 --mount-path=/data --containers=c1
kind: DeploymentConfig apiVersion: apps.openshift.io/v1 metadata: name: example namespace: example spec: replicas: 3 selector: app: httpd template: metadata: labels: app: httpd spec: volumes: - name: volume-pppsw emptyDir: {} - name: v1 1 persistentVolumeClaim: claimName: pvc1 containers: - name: httpd image: >- image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest ports: - containerPort: 8080 protocol: TCP volumeMounts: 2 - name: v1 mountPath: /data
oc set volume rc --all --add --name=v1 --source='{"gitRepo": { "repository": "https://github.com/namespace1/project1", "revision": "5125c45f9f563" }}'
oc set volume <object_type>/<name> --add --overwrite [options]
oc set volume rc/r1 --add --overwrite --name=v1 --type=persistentVolumeClaim --claim-name=pvc1
kind: ReplicationController apiVersion: v1 metadata: name: example-1 namespace: example spec: replicas: 0 selector: app: httpd deployment: example-1 deploymentconfig: example template: metadata: labels: app: httpd deployment: example-1 deploymentconfig: example spec: volumes: - name: v1 1 persistentVolumeClaim: claimName: pvc1 containers: - name: httpd image: >- image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest ports: - containerPort: 8080 protocol: TCP volumeMounts: - name: v1 mountPath: /data
oc set volume dc/d1 --add --overwrite --name=v1 --mount-path=/opt
kind: DeploymentConfig apiVersion: apps.openshift.io/v1 metadata: name: example namespace: example spec: replicas: 3 selector: app: httpd template: metadata: labels: app: httpd spec: volumes: - name: volume-pppsw emptyDir: {} - name: v2 persistentVolumeClaim: claimName: pvc1 - name: v1 persistentVolumeClaim: claimName: pvc1 containers: - name: httpd image: >- image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest ports: - containerPort: 8080 protocol: TCP volumeMounts: 1 - name: v1 mountPath: /opt
oc set volume <object_type>/<name> --remove [options]
oc set volume dc/d1 --remove --name=v1
oc set volume dc/d1 --remove --name=v1 --containers=c1
oc set volume rc/r1 --remove --confirm
oc rsh <pod>
sh-4.2USD ls /path/to/volume/subpath/mount example_file1 example_file2 example_file3
apiVersion: v1 kind: Pod metadata: name: my-site spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: mysql image: mysql volumeMounts: - mountPath: /var/lib/mysql name: site-data subPath: mysql 1 securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] - name: php image: php volumeMounts: - mountPath: /var/www/html name: site-data subPath: html 2 securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: site-data persistentVolumeClaim: claimName: my-site-data
apiVersion: v1 kind: Pod metadata: name: volume-test spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: container-test image: busybox volumeMounts: 1 - name: all-in-one mountPath: "/projected-volume" 2 readOnly: true 3 securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: 4 - name: all-in-one 5 projected: defaultMode: 0400 6 sources: - secret: name: mysecret 7 items: - key: username path: my-group/my-username 8 - downwardAPI: 9 items: - path: "labels" fieldRef: fieldPath: metadata.labels - path: "cpu_limit" resourceFieldRef: containerName: container-test resource: limits.cpu - configMap: 10 name: myconfigmap items: - key: config path: my-group/my-config mode: 0777 11
apiVersion: v1 kind: Pod metadata: name: volume-test spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: container-test image: busybox volumeMounts: - name: all-in-one mountPath: "/projected-volume" readOnly: true securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: all-in-one projected: defaultMode: 0755 sources: - secret: name: mysecret items: - key: username path: my-group/my-username - secret: name: mysecret2 items: - key: password path: my-group/my-password mode: 511
apiVersion: v1 kind: Pod metadata: name: volume-test spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: container-test image: busybox volumeMounts: - name: all-in-one mountPath: "/projected-volume" readOnly: true securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: all-in-one projected: sources: - secret: name: mysecret items: - key: username path: my-group/data - configMap: name: myconfigmap items: - key: config path: my-group/data
echo -n "admin" | base64
YWRtaW4=
echo -n "1f2d1e2e67df" | base64
MWYyZDFlMmU2N2Rm
apiVersion: v1 kind: Secret metadata: name: mysecret type: Opaque data: pass: MWYyZDFlMmU2N2Rm user: YWRtaW4=
oc create -f <secrets-filename>
oc create -f secret.yaml
secret "mysecret" created
oc get secret <secret-name>
oc get secret mysecret
NAME TYPE DATA AGE mysecret Opaque 2 17h
oc get secret <secret-name> -o yaml
oc get secret mysecret -o yaml
apiVersion: v1 data: pass: MWYyZDFlMmU2N2Rm user: YWRtaW4= kind: Secret metadata: creationTimestamp: 2017-05-30T20:21:38Z name: mysecret namespace: default resourceVersion: "2107" selfLink: /api/v1/namespaces/default/secrets/mysecret uid: 959e0424-4575-11e7-9f97-fa163e4bd54c type: Opaque
kind: Pod metadata: name: test-projected-volume spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test-projected-volume image: busybox args: - sleep - "86400" volumeMounts: - name: all-in-one mountPath: "/projected-volume" readOnly: true securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: all-in-one projected: sources: - secret: name: mysecret 1
oc create -f <your_yaml_file>.yaml
oc create -f secret-pod.yaml
pod "test-projected-volume" created
oc get pod <name>
oc get pod test-projected-volume
NAME READY STATUS RESTARTS AGE test-projected-volume 1/1 Running 0 14s
oc exec -it <pod> <command>
oc exec -it test-projected-volume -- /bin/sh
/ # ls
bin home root tmp dev proc run usr etc projected-volume sys var
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: env-test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: - name: MY_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: MY_POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
oc create -f pod.yaml
oc logs -p dapi-env-test-pod
kind: Pod apiVersion: v1 metadata: labels: zone: us-east-coast cluster: downward-api-test-cluster1 rack: rack-123 name: dapi-volume-test-pod annotations: annotation1: "345" annotation2: "456" spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: volume-test-container image: gcr.io/google_containers/busybox command: ["sh", "-c", "cat /tmp/etc/pod_labels /tmp/etc/pod_annotations"] volumeMounts: - name: podinfo mountPath: /tmp/etc readOnly: false securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] volumes: - name: podinfo downwardAPI: defaultMode: 420 items: - fieldRef: fieldPath: metadata.name path: pod_name - fieldRef: fieldPath: metadata.namespace path: pod_namespace - fieldRef: fieldPath: metadata.labels path: pod_labels - fieldRef: fieldPath: metadata.annotations path: pod_annotations restartPolicy: Never
oc create -f volume-pod.yaml
oc logs -p dapi-volume-test-pod
cluster=downward-api-test-cluster1 rack=rack-123 zone=us-east-coast annotation1=345 annotation2=456 kubernetes.io/config.source=api
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: containers: - name: test-container image: gcr.io/google_containers/busybox:1.24 command: [ "/bin/sh", "-c", "env" ] resources: requests: memory: "32Mi" cpu: "125m" limits: memory: "64Mi" cpu: "250m" env: - name: MY_CPU_REQUEST valueFrom: resourceFieldRef: resource: requests.cpu - name: MY_CPU_LIMIT valueFrom: resourceFieldRef: resource: limits.cpu - name: MY_MEM_REQUEST valueFrom: resourceFieldRef: resource: requests.memory - name: MY_MEM_LIMIT valueFrom: resourceFieldRef: resource: limits.memory
oc create -f pod.yaml
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: containers: - name: client-container image: gcr.io/google_containers/busybox:1.24 command: ["sh", "-c", "while true; do echo; if [[ -e /etc/cpu_limit ]]; then cat /etc/cpu_limit; fi; if [[ -e /etc/cpu_request ]]; then cat /etc/cpu_request; fi; if [[ -e /etc/mem_limit ]]; then cat /etc/mem_limit; fi; if [[ -e /etc/mem_request ]]; then cat /etc/mem_request; fi; sleep 5; done"] resources: requests: memory: "32Mi" cpu: "125m" limits: memory: "64Mi" cpu: "250m" volumeMounts: - name: podinfo mountPath: /etc readOnly: false volumes: - name: podinfo downwardAPI: items: - path: "cpu_limit" resourceFieldRef: containerName: client-container resource: limits.cpu - path: "cpu_request" resourceFieldRef: containerName: client-container resource: requests.cpu - path: "mem_limit" resourceFieldRef: containerName: client-container resource: limits.memory - path: "mem_request" resourceFieldRef: containerName: client-container resource: requests.memory
oc create -f volume-pod.yaml
apiVersion: v1 kind: Secret metadata: name: mysecret data: password: <password> username: <username> type: kubernetes.io/basic-auth
oc create -f secret.yaml
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: env-test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: - name: MY_SECRET_USERNAME valueFrom: secretKeyRef: name: mysecret key: username securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
oc create -f pod.yaml
oc logs -p dapi-env-test-pod
apiVersion: v1 kind: ConfigMap metadata: name: myconfigmap data: mykey: myvalue
oc create -f configmap.yaml
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: env-test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: - name: MY_CONFIGMAP_VALUE valueFrom: configMapKeyRef: name: myconfigmap key: mykey securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Always
oc create -f pod.yaml
oc logs -p dapi-env-test-pod
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: env-test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: - name: MY_EXISTING_ENV value: my_value - name: MY_ENV_VAR_REF_ENV value: USD(MY_EXISTING_ENV) securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
oc create -f pod.yaml
oc logs -p dapi-env-test-pod
apiVersion: v1 kind: Pod metadata: name: dapi-env-test-pod spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: env-test-container image: gcr.io/google_containers/busybox command: [ "/bin/sh", "-c", "env" ] env: - name: MY_NEW_ENV value: USDUSD(SOME_OTHER_ENV) securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL] restartPolicy: Never
oc create -f pod.yaml
oc logs -p dapi-env-test-pod
oc rsync <source> <destination> [-c <container>]
<pod name>:<dir>
oc rsync <local-dir> <pod-name>:/<remote-dir> -c <container-name>
oc rsync /home/user/source devpod1234:/src -c user-container
oc rsync devpod1234:/src /home/user/source
oc rsync devpod1234:/src/status.txt /home/user/
rsync --rsh='oc rsh' --exclude-from=<file_name> <local-dir> <pod-name>:/<remote-dir>
export RSYNC_RSH='oc rsh'
rsync --exclude-from=<file_name> <local-dir> <pod-name>:/<remote-dir>
oc exec <pod> [-c <container>] -- <command> [<arg_1> ... <arg_n>]
oc exec mypod date
Thu Apr 9 02:21:53 UTC 2015
/proxy/nodes/<node_name>/exec/<namespace>/<pod>/<container>?command=<command>
/proxy/nodes/node123.openshift.com/exec/myns/mypod/mycontainer?command=date
oc port-forward <pod> [<local_port>:]<remote_port> [...[<local_port_n>:]<remote_port_n>]
oc port-forward <pod> [<local_port>:]<remote_port> [...[<local_port_n>:]<remote_port_n>]
oc port-forward <pod> 5000 6000
Forwarding from 127.0.0.1:5000 -> 5000 Forwarding from [::1]:5000 -> 5000 Forwarding from 127.0.0.1:6000 -> 6000 Forwarding from [::1]:6000 -> 6000
oc port-forward <pod> 8888:5000
Forwarding from 127.0.0.1:8888 -> 5000 Forwarding from [::1]:8888 -> 5000
oc port-forward <pod> :5000
Forwarding from 127.0.0.1:42390 -> 5000 Forwarding from [::1]:42390 -> 5000
oc port-forward <pod> 0:5000
/proxy/nodes/<node_name>/portForward/<namespace>/<pod>
/proxy/nodes/node123.openshift.com/portForward/myns/mypod
oc get events [-n <project>] 1
oc get events -n openshift-config
LAST SEEN TYPE REASON OBJECT MESSAGE 97m Normal Scheduled pod/dapi-env-test-pod Successfully assigned openshift-config/dapi-env-test-pod to ip-10-0-171-202.ec2.internal 97m Normal Pulling pod/dapi-env-test-pod pulling image "gcr.io/google_containers/busybox" 97m Normal Pulled pod/dapi-env-test-pod Successfully pulled image "gcr.io/google_containers/busybox" 97m Normal Created pod/dapi-env-test-pod Created container 9m5s Warning FailedCreatePodSandBox pod/dapi-volume-test-pod Failed create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_dapi-volume-test-pod_openshift-config_6bc60c1f-452e-11e9-9140-0eec59c23068_0(748c7a40db3d08c07fb4f9eba774bd5effe5f0d5090a242432a73eee66ba9e22): Multus: Err adding pod to network "ovn-kubernetes": cannot set "ovn-kubernetes" ifname to "eth0": no netns: failed to Statfs "/proc/33366/ns/net": no such file or directory 8m31s Normal Scheduled pod/dapi-volume-test-pod Successfully assigned openshift-config/dapi-volume-test-pod to ip-10-0-171-202.ec2.internal #
apiVersion: v1 kind: Pod metadata: name: small-pod labels: app: guestbook tier: frontend spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: php-redis image: gcr.io/google-samples/gb-frontend:v4 imagePullPolicy: Always resources: limits: cpu: 150m memory: 100Mi requests: cpu: 150m memory: 100Mi securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
oc create -f <file_name>.yaml
oc create -f pod-spec.yaml
podman login registry.redhat.io
podman pull registry.redhat.io/openshift4/ose-cluster-capacity
podman run -v USDHOME/.kube:/kube:Z -v USD(pwd):/cc:Z ose-cluster-capacity /bin/cluster-capacity --kubeconfig /kube/config --<pod_spec>.yaml /cc/<pod_spec>.yaml --verbose
small-pod pod requirements: - CPU: 150m - Memory: 100Mi The cluster can schedule 88 instance(s) of the pod small-pod. Termination reason: Unschedulable: 0/5 nodes are available: 2 Insufficient cpu, 3 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate. Pod distribution among nodes: small-pod - 192.168.124.214: 45 instance(s) - 192.168.124.120: 43 instance(s)
kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata: name: cluster-capacity-role rules: - apiGroups: [""] resources: ["pods", "nodes", "persistentvolumeclaims", "persistentvolumes", "services", "replicationcontrollers"] verbs: ["get", "watch", "list"] - apiGroups: ["apps"] resources: ["replicasets", "statefulsets"] verbs: ["get", "watch", "list"] - apiGroups: ["policy"] resources: ["poddisruptionbudgets"] verbs: ["get", "watch", "list"] - apiGroups: ["storage.k8s.io"] resources: ["storageclasses"] verbs: ["get", "watch", "list"]
oc create -f <file_name>.yaml
oc create sa cluster-capacity-sa
oc create sa cluster-capacity-sa -n default
oc adm policy add-cluster-role-to-user cluster-capacity-role system:serviceaccount:<namespace>:cluster-capacity-sa
apiVersion: v1 kind: Pod metadata: name: small-pod labels: app: guestbook tier: frontend spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: php-redis image: gcr.io/google-samples/gb-frontend:v4 imagePullPolicy: Always resources: limits: cpu: 150m memory: 100Mi requests: cpu: 150m memory: 100Mi securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
oc create -f <file_name>.yaml
oc create -f pod.yaml
oc create configmap cluster-capacity-configmap --from-file=pod.yaml=pod.yaml
apiVersion: batch/v1 kind: Job metadata: name: cluster-capacity-job spec: parallelism: 1 completions: 1 template: metadata: name: cluster-capacity-pod spec: containers: - name: cluster-capacity image: openshift/origin-cluster-capacity imagePullPolicy: "Always" volumeMounts: - mountPath: /test-pod name: test-volume env: - name: CC_INCLUSTER 1 value: "true" command: - "/bin/sh" - "-ec" - | /bin/cluster-capacity --podspec=/test-pod/pod.yaml --verbose restartPolicy: "Never" serviceAccountName: cluster-capacity-sa volumes: - name: test-volume configMap: name: cluster-capacity-configmap
oc create -f cluster-capacity-job.yaml
oc logs jobs/cluster-capacity-job
small-pod pod requirements: - CPU: 150m - Memory: 100Mi The cluster can schedule 52 instance(s) of the pod small-pod. Termination reason: Unschedulable: No nodes are available that match all of the following predicates:: Insufficient cpu (2). Pod distribution among nodes: small-pod - 192.168.124.214: 26 instance(s) - 192.168.124.120: 26 instance(s)
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" spec: limits: - type: "Container" max: cpu: "2" memory: "1Gi" min: cpu: "100m" memory: "4Mi" default: cpu: "300m" memory: "200Mi" defaultRequest: cpu: "200m" memory: "100Mi" maxLimitRequestRatio: cpu: "10"
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: "Container" max: cpu: "2" 2 memory: "1Gi" 3 min: cpu: "100m" 4 memory: "4Mi" 5 default: cpu: "300m" 6 memory: "200Mi" 7 defaultRequest: cpu: "200m" 8 memory: "100Mi" 9 maxLimitRequestRatio: cpu: "10" 10
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: "Pod" max: cpu: "2" 2 memory: "1Gi" 3 min: cpu: "200m" 4 memory: "6Mi" 5 maxLimitRequestRatio: cpu: "10" 6
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: openshift.io/Image max: storage: 1Gi 2
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: openshift.io/ImageStream max: openshift.io/image-tags: 20 2 openshift.io/images: 30 3
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: "PersistentVolumeClaim" min: storage: "2Gi" 2 max: storage: "50Gi" 3
apiVersion: "v1" kind: "LimitRange" metadata: name: "resource-limits" 1 spec: limits: - type: "Pod" 2 max: cpu: "2" memory: "1Gi" min: cpu: "200m" memory: "6Mi" - type: "Container" 3 max: cpu: "2" memory: "1Gi" min: cpu: "100m" memory: "4Mi" default: 4 cpu: "300m" memory: "200Mi" defaultRequest: 5 cpu: "200m" memory: "100Mi" maxLimitRequestRatio: 6 cpu: "10" - type: openshift.io/Image 7 max: storage: 1Gi - type: openshift.io/ImageStream 8 max: openshift.io/image-tags: 20 openshift.io/images: 30 - type: "PersistentVolumeClaim" 9 min: storage: "2Gi" max: storage: "50Gi"
oc create -f <limit_range_file> -n <project> 1
oc get limits -n demoproject
NAME CREATED AT resource-limits 2020-07-15T17:14:23Z
oc describe limits resource-limits -n demoproject
Name: resource-limits Namespace: demoproject Type Resource Min Max Default Request Default Limit Max Limit/Request Ratio ---- -------- --- --- --------------- ------------- ----------------------- Pod cpu 200m 2 - - - Pod memory 6Mi 1Gi - - - Container cpu 100m 2 200m 300m 10 Container memory 4Mi 1Gi 100Mi 200Mi - openshift.io/Image storage - 1Gi - - - openshift.io/ImageStream openshift.io/image - 12 - - - openshift.io/ImageStream openshift.io/image-tags - 10 - - - PersistentVolumeClaim storage - 50Gi - - -
oc delete limits <limit_name>
-XX:+UseParallelGC -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90.
JAVA_TOOL_OPTIONS="-XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -Dsun.zip.disableMemoryMapping=true"
apiVersion: v1 kind: Pod metadata: name: test spec: securityContext: runAsNonRoot: true seccompProfile: type: RuntimeDefault containers: - name: test image: fedora:latest command: - sleep - "3600" env: - name: MEMORY_REQUEST 1 valueFrom: resourceFieldRef: containerName: test resource: requests.memory - name: MEMORY_LIMIT 2 valueFrom: resourceFieldRef: containerName: test resource: limits.memory resources: requests: memory: 384Mi limits: memory: 512Mi securityContext: allowPrivilegeEscalation: false capabilities: drop: [ALL]
oc create -f <file_name>.yaml
oc rsh test
env | grep MEMORY | sort
MEMORY_LIMIT=536870912 MEMORY_REQUEST=402653184
oc rsh test
grep '^oom_kill ' /sys/fs/cgroup/memory/memory.oom_control
oom_kill 0
sed -e '' </dev/zero
Killed
echo USD?
137
grep '^oom_kill ' /sys/fs/cgroup/memory/memory.oom_control
oom_kill 1
oc get pod test
NAME READY STATUS RESTARTS AGE test 0/1 OOMKilled 0 1m
oc get pod test -o yaml
status: containerStatuses: - name: test ready: false restartCount: 0 state: terminated: exitCode: 137 reason: OOMKilled phase: Failed
oc get pod test -o yaml
status: containerStatuses: - name: test ready: true restartCount: 1 lastState: terminated: exitCode: 137 reason: OOMKilled state: running: phase: Running
oc get pod test
NAME READY STATUS RESTARTS AGE test 0/1 Evicted 0 1m
oc get pod test -o yaml
status: message: 'Pod The node was low on resource: [MemoryPressure].' phase: Failed reason: Evicted
oc edit namespace/<project_name>
apiVersion: v1 kind: Namespace metadata: annotations: quota.openshift.io/cluster-resource-override-enabled: "false" <.>