Architecture OpenShift Container Platform 4.17 An overview of the architecture for OpenShift Container Platform Red Hat OpenShift Documentation Team

Commands:
Disabling ownership via cluster version overrides prevents upgrades. Please remove overrides before continuing.
openshift-install create ignition-configs --dir USDHOME/testconfig
cat USDHOME/testconfig/bootstrap.ign | jq { "ignition": { "version": "3.2.0" }, "passwd": { "users": [ { "name": "core", "sshAuthorizedKeys": [ "ssh-rsa AAAAB3NzaC1yc...." ] } ] }, "storage": { "files": [ { "overwrite": false, "path": "/etc/motd", "user": { "name": "root" }, "append": [ { "source": "data:text/plain;charset=utf-8;base64,VGhpcyBpcyB0aGUgYm9vdHN0cmFwIG5vZGU7IGl0IHdpbGwgYmUgZGVzdHJveWVkIHdoZW4gdGhlIG1hc3RlciBpcyBmdWxseSB1cC4KClRoZSBwcmltYXJ5IHNlcnZpY2VzIGFyZSByZWxlYXNlLWltYWdlLnNlcnZpY2UgZm9sbG93ZWQgYnkgYm9vdGt1YmUuc2VydmljZS4gVG8gd2F0Y2ggdGhlaXIgc3RhdHVzLCBydW4gZS5nLgoKICBqb3VybmFsY3RsIC1iIC1mIC11IHJlbGVhc2UtaW1hZ2Uuc2VydmljZSAtdSBib290a3ViZS5zZXJ2aWNlCg==" } ], "mode": 420 },
echo VGhpcyBpcyB0aGUgYm9vdHN0cmFwIG5vZGU7IGl0IHdpbGwgYmUgZGVzdHJveWVkIHdoZW4gdGhlIG1hc3RlciBpcyBmdWxseSB1cC4KClRoZSBwcmltYXJ5IHNlcnZpY2VzIGFyZSByZWxlYXNlLWltYWdlLnNlcnZpY2UgZm9sbG93ZWQgYnkgYm9vdGt1YmUuc2VydmljZS4gVG8gd2F0Y2ggdGhlaXIgc3RhdHVzLCBydW4gZS5nLgoKICBqb3VybmFsY3RsIC1iIC1mIC11IHJlbGVhc2UtaW1hZ2Uuc2VydmljZSAtdSBib290a3ViZS5zZXJ2aWNlCg== | base64 --decode
This is the bootstrap node; it will be destroyed when the master is fully up. The primary services are release-image.service followed by bootkube.service. To watch their status, run e.g. journalctl -b -f -u release-image.service -u bootkube.service
"source": "https://api.myign.develcluster.example.com:22623/config/worker",
USD oc get machineconfigpools
NAME CONFIG UPDATED UPDATING DEGRADED master master-1638c1aea398413bb918e76632f20799 False False False worker worker-2feef4f8288936489a5a832ca8efe953 False False False
oc get machineconfig
NAME GENERATEDBYCONTROLLER IGNITIONVERSION CREATED OSIMAGEURL 00-master 4.0.0-0.150.0.0-dirty 3.2.0 16m 00-master-ssh 4.0.0-0.150.0.0-dirty 16m 00-worker 4.0.0-0.150.0.0-dirty 3.2.0 16m 00-worker-ssh 4.0.0-0.150.0.0-dirty 16m 01-master-kubelet 4.0.0-0.150.0.0-dirty 3.2.0 16m 01-worker-kubelet 4.0.0-0.150.0.0-dirty 3.2.0 16m master-1638c1aea398413bb918e76632f20799 4.0.0-0.150.0.0-dirty 3.2.0 16m worker-2feef4f8288936489a5a832ca8efe953 4.0.0-0.150.0.0-dirty 3.2.0 16m
oc describe machineconfigs 01-worker-container-runtime | grep Path:
Path: /etc/containers/registries.conf Path: /etc/containers/storage.conf Path: /etc/crio/crio.conf
apiVersion: admissionregistration.k8s.io/v1beta1 kind: MutatingWebhookConfiguration 1 metadata: name: <webhook_name> 2 webhooks: - name: <webhook_name> 3 clientConfig: 4 service: namespace: default 5 name: kubernetes 6 path: <webhook_url> 7 caBundle: <ca_signing_certificate> 8 rules: 9 - operations: 10 - <operation> apiGroups: - "" apiVersions: - "*" resources: - <resource> failurePolicy: <policy> 11 sideEffects: None
apiVersion: admissionregistration.k8s.io/v1beta1 kind: ValidatingWebhookConfiguration 1 metadata: name: <webhook_name> 2 webhooks: - name: <webhook_name> 3 clientConfig: 4 service: namespace: default 5 name: kubernetes 6 path: <webhook_url> 7 caBundle: <ca_signing_certificate> 8 rules: 9 - operations: 10 - <operation> apiGroups: - "" apiVersions: - "*" resources: - <resource> failurePolicy: <policy> 11 sideEffects: Unknown
oc new-project my-webhook-namespace 1
apiVersion: v1 kind: List items: - apiVersion: rbac.authorization.k8s.io/v1 1 kind: ClusterRoleBinding metadata: name: auth-delegator-my-webhook-namespace roleRef: kind: ClusterRole apiGroup: rbac.authorization.k8s.io name: system:auth-delegator subjects: - kind: ServiceAccount namespace: my-webhook-namespace name: server - apiVersion: rbac.authorization.k8s.io/v1 2 kind: ClusterRole metadata: annotations: name: system:openshift:online:my-webhook-server rules: - apiGroups: - online.openshift.io resources: - namespacereservations 3 verbs: - get - list - watch - apiVersion: rbac.authorization.k8s.io/v1 4 kind: ClusterRole metadata: name: system:openshift:online:my-webhook-requester rules: - apiGroups: - admission.online.openshift.io resources: - namespacereservations 5 verbs: - create - apiVersion: rbac.authorization.k8s.io/v1 6 kind: ClusterRoleBinding metadata: name: my-webhook-server-my-webhook-namespace roleRef: kind: ClusterRole apiGroup: rbac.authorization.k8s.io name: system:openshift:online:my-webhook-server subjects: - kind: ServiceAccount namespace: my-webhook-namespace name: server - apiVersion: rbac.authorization.k8s.io/v1 7 kind: RoleBinding metadata: namespace: kube-system name: extension-server-authentication-reader-my-webhook-namespace roleRef: kind: Role apiGroup: rbac.authorization.k8s.io name: extension-apiserver-authentication-reader subjects: - kind: ServiceAccount namespace: my-webhook-namespace name: server - apiVersion: rbac.authorization.k8s.io/v1 8 kind: ClusterRole metadata: name: my-cluster-role rules: - apiGroups: - admissionregistration.k8s.io resources: - validatingwebhookconfigurations - mutatingwebhookconfigurations verbs: - get - list - watch - apiGroups: - "" resources: - namespaces verbs: - get - list - watch - apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: my-cluster-role roleRef: kind: ClusterRole apiGroup: rbac.authorization.k8s.io name: my-cluster-role subjects: - kind: ServiceAccount namespace: my-webhook-namespace name: server
oc auth reconcile -f rbac.yaml
apiVersion: apps/v1 kind: DaemonSet metadata: namespace: my-webhook-namespace name: server labels: server: "true" spec: selector: matchLabels: server: "true" template: metadata: name: server labels: server: "true" spec: serviceAccountName: server containers: - name: my-webhook-container 1 image: <image_registry_username>/<image_path>:<tag> 2 imagePullPolicy: IfNotPresent command: - <container_commands> 3 ports: - containerPort: 8443 4 volumeMounts: - mountPath: /var/serving-cert name: serving-cert readinessProbe: httpGet: path: /healthz port: 8443 5 scheme: HTTPS volumes: - name: serving-cert secret: defaultMode: 420 secretName: server-serving-cert
oc apply -f webhook-daemonset.yaml
apiVersion: v1 kind: Secret metadata: namespace: my-webhook-namespace name: server-serving-cert type: kubernetes.io/tls data: tls.crt: <server_certificate> 1 tls.key: <server_key> 2
oc apply -f webhook-secret.yaml
apiVersion: v1 kind: List items: - apiVersion: v1 kind: ServiceAccount metadata: namespace: my-webhook-namespace name: server - apiVersion: v1 kind: Service metadata: namespace: my-webhook-namespace name: server annotations: service.beta.openshift.io/serving-cert-secret-name: server-serving-cert spec: selector: server: "true" ports: - port: 443 1 targetPort: 8443 2
oc apply -f webhook-service.yaml
apiVersion: apiextensions.k8s.io/v1beta1 kind: CustomResourceDefinition metadata: name: namespacereservations.online.openshift.io 1 spec: group: online.openshift.io 2 version: v1alpha1 3 scope: Cluster 4 names: plural: namespacereservations 5 singular: namespacereservation 6 kind: NamespaceReservation 7
oc apply -f webhook-crd.yaml
apiVersion: apiregistration.k8s.io/v1beta1 kind: APIService metadata: name: v1beta1.admission.online.openshift.io spec: caBundle: <ca_signing_certificate> 1 group: admission.online.openshift.io groupPriorityMinimum: 1000 versionPriority: 15 service: name: server namespace: my-webhook-namespace version: v1beta1
oc apply -f webhook-api-service.yaml
apiVersion: admissionregistration.k8s.io/v1beta1 kind: ValidatingWebhookConfiguration metadata: name: namespacereservations.admission.online.openshift.io 1 webhooks: - name: namespacereservations.admission.online.openshift.io 2 clientConfig: service: 3 namespace: default name: kubernetes path: /apis/admission.online.openshift.io/v1beta1/namespacereservations 4 caBundle: <ca_signing_certificate> 5 rules: - operations: - CREATE apiGroups: - project.openshift.io apiVersions: - "*" resources: - projectrequests - operations: - CREATE apiGroups: - "" apiVersions: - "*" resources: - namespaces failurePolicy: Fail
oc apply -f webhook-config.yaml