Chapter 8. High availability for hosted control planes 8.1. Recovering an unhealthy etcd cluster In a highly available control plane, three etcd pods run as a part of a stateful set in an etcd cluster. To recover an etcd cluster, identify unhealthy etcd pods by checking the etcd cluster health. 8.1.1. Checking the status of an etcd cluster You can check the status of the etcd cluster health by logging into any etcd pod. Procedure Log in to an etcd pod by entering the following command: USD oc rsh -n openshift-etcd -c etcd <etcd_pod_name> Print the health status of an etcd cluster by entering the following command: sh-4.4# etcdctl endpoint status -w table Example output +------------------------------+-----------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +------------------------------+-----------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://192.168.1xxx.20:2379 | 8fxxxxxxxxxx | 3.5.12 | 123 MB | false | false | 10 | 180156 | 180156 | | | https://192.168.1xxx.21:2379 | a5xxxxxxxxxx | 3.5.12 | 122 MB | false | false | 10 | 180156 | 180156 | | | https://192.168.1xxx.22:2379 | 7cxxxxxxxxxx | 3.5.12 | 124 MB | true | false | 10 | 180156 | 180156 | | +-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ 8.1.2. Recovering a failing etcd pod Each etcd pod of a 3-node cluster has its own persistent volume claim (PVC) to store its data. An etcd pod might fail because of corrupted or missing data. You can recover a failing etcd pod and its PVC. Procedure To confirm that the etcd pod is failing, enter the following command: USD oc get pods -l app=etcd -n openshift-etcd Example output NAME READY STATUS RESTARTS AGE etcd-0 2/2 Running 0 64m etcd-1 2/2 Running 0 45m etcd-2 1/2 CrashLoopBackOff 1 (5s ago) 64m The failing etcd pod might have the CrashLoopBackOff or Error status. Delete the failing pod and its PVC by entering the following command: USD oc delete pods etcd-2 -n openshift-etcd Verification Verify that a new etcd pod is up and running by entering the following command: USD oc get pods -l app=etcd -n openshift-etcd Example output NAME READY STATUS RESTARTS AGE etcd-0 2/2 Running 0 67m etcd-1 2/2 Running 0 48m etcd-2 2/2 Running 0 2m2s 8.2. Backing up and restoring etcd in an on-premise environment You can back up and restore etcd on a hosted cluster in an on-premise environment to fix failures. 8.2.1. Backing up and restoring etcd on a hosted cluster in an on-premise environment By backing up and restoring etcd on a hosted cluster, you can fix failures, such as corrupted or missing data in an etcd member of a three node cluster. If multiple members of the etcd cluster encounter data loss or have a CrashLoopBackOff status, this approach helps prevent an etcd quorum loss. Important This procedure requires API downtime. Prerequisites The oc and jq binaries have been installed. Procedure First, set up your environment variables and scale down the API servers: Set up environment variables for your hosted cluster by entering the following commands, replacing values as necessary: USD CLUSTER_NAME=my-cluster USD HOSTED_CLUSTER_NAMESPACE=clusters USD CONTROL_PLANE_NAMESPACE="USD{HOSTED_CLUSTER_NAMESPACE}-USD{CLUSTER_NAME}" Pause reconciliation of the hosted cluster by entering the following command, replacing values as necessary: USD oc patch -n USD{HOSTED_CLUSTER_NAMESPACE} hostedclusters/USD{CLUSTER_NAME} -p '{"spec":{"pausedUntil":"true"}}' --type=merge Scale down the API servers by entering the following commands: Scale down the kube-apiserver : USD oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/kube-apiserver --replicas=0 Scale down the openshift-apiserver : USD oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/openshift-apiserver --replicas=0 Scale down the openshift-oauth-apiserver : USD oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/openshift-oauth-apiserver --replicas=0 , take a snapshot of etcd by using one of the following methods: Use a previously backed-up snapshot of etcd. If you have an available etcd pod, take a snapshot from the active etcd pod by completing the following steps: List etcd pods by entering the following command: USD oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd Take a snapshot of the pod database and save it locally to your machine by entering the following commands: USD ETCD_POD=etcd-0 USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} -c etcd -t USD{ETCD_POD} -- env ETCDCTL_API=3 /usr/bin/etcdctl \ --cacert /etc/etcd/tls/etcd-ca/ca.crt \ --cert /etc/etcd/tls/client/etcd-client.crt \ --key /etc/etcd/tls/client/etcd-client.key \ --endpoints=https://localhost:2379 \ snapshot save /var/lib/snapshot.db Verify that the snapshot is successful by entering the following command: USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} -c etcd -t USD{ETCD_POD} -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/snapshot.db Make a local copy of the snapshot by entering the following command: USD oc cp -c etcd USD{CONTROL_PLANE_NAMESPACE}/USD{ETCD_POD}:/var/lib/snapshot.db /tmp/etcd.snapshot.db Make a copy of the snapshot database from etcd persistent storage: List etcd pods by entering the following command: USD oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd Find a pod that is running and set its name as the value of ETCD_POD: ETCD_POD=etcd-0 , and then copy its snapshot database by entering the following command: USD oc cp -c etcd USD{CONTROL_PLANE_NAMESPACE}/USD{ETCD_POD}:/var/lib/data/member/snap/db /tmp/etcd.snapshot.db , scale down the etcd statefulset by entering the following command: USD oc scale -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd --replicas=0 Delete volumes for second and third members by entering the following command: USD oc delete -n USD{CONTROL_PLANE_NAMESPACE} pvc/data-etcd-1 pvc/data-etcd-2 Create a pod to access the first etcd member's data: Get the etcd image by entering the following command: USD ETCD_IMAGE=USD(oc get -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd -o jsonpath='{ .spec.template.spec.containers[0].image }') Create a pod that allows access to etcd data: USD cat << EOF | oc apply -n USD{CONTROL_PLANE_NAMESPACE} -f - apiVersion: apps/v1 kind: Deployment metadata: name: etcd-data spec: replicas: 1 selector: matchLabels: app: etcd-data template: metadata: labels: app: etcd-data spec: containers: - name: access image: USDETCD_IMAGE volumeMounts: - name: data mountPath: /var/lib command: - /usr/bin/bash args: - -c - |- while true; do sleep 1000 done volumes: - name: data persistentVolumeClaim: claimName: data-etcd-0 EOF Check the status of the etcd-data pod and wait for it to be running by entering the following command: USD oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd-data Get the name of the etcd-data pod by entering the following command: USD DATA_POD=USD(oc get -n USD{CONTROL_PLANE_NAMESPACE} pods --no-headers -l app=etcd-data -o name | cut -d/ -f2) Copy an etcd snapshot into the pod by entering the following command: USD oc cp /tmp/etcd.snapshot.db USD{CONTROL_PLANE_NAMESPACE}/USD{DATA_POD}:/var/lib/restored.snap.db Remove old data from the etcd-data pod by entering the following commands: USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- rm -rf /var/lib/data USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- mkdir -p /var/lib/data Restore the etcd snapshot by entering the following command: USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- etcdutl snapshot restore /var/lib/restored.snap.db \ --data-dir=/var/lib/data --skip-hash-check \ --name etcd-0 \ --initial-cluster-token=etcd-cluster \ --initial-cluster etcd-0=https://etcd-0.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380,etcd-1=https://etcd-1.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380,etcd-2=https://etcd-2.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380 \ --initial-advertise-peer-urls https://etcd-0.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380 Remove the temporary etcd snapshot from the pod by entering the following command: USD oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- rm /var/lib/restored.snap.db Delete data access deployment by entering the following command: USD oc delete -n USD{CONTROL_PLANE_NAMESPACE} deployment/etcd-data Scale up the etcd cluster by entering the following command: USD oc scale -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd --replicas=3 Wait for the etcd member pods to return and report as available by entering the following command: USD oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd -w Scale up all etcd-writer deployments by entering the following command: USD oc scale deployment -n USD{CONTROL_PLANE_NAMESPACE} --replicas=3 kube-apiserver openshift-apiserver openshift-oauth-apiserver Restore reconciliation of the hosted cluster by entering the following command: USD oc patch -n USD{HOSTED_CLUSTER_NAMESPACE} hostedclusters/USD{CLUSTER_NAME} -p '{"spec":{"pausedUntil":""}}' --type=merge 8.3. Backing up and restoring etcd on AWS You can back up and restore etcd on a hosted cluster on Amazon Web Services (AWS) to fix failures. Important Hosted control planes on the AWS platform is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope . 8.3.1. Taking a snapshot of etcd for a hosted cluster To back up etcd for a hosted cluster, you must take a snapshot of etcd. Later, you can restore etcd by using the snapshot. Important This procedure requires API downtime. Procedure Pause reconciliation of the hosted cluster by entering the following command: USD oc patch -n clusters hostedclusters/<hosted_cluster_name> -p '{"spec":{"pausedUntil":"true"}}' --type=merge Stop all etcd-writer deployments by entering the following command: USD oc scale deployment -n <hosted_cluster_namespace> --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver To take an etcd snapshot, use the exec command in each etcd container by entering the following command: USD oc exec -it <etcd_pod_name> -n <hosted_cluster_namespace> -- env ETCDCTL_API=3 /usr/bin/etcdctl --cacert /etc/etcd/tls/etcd-ca/ca.crt --cert /etc/etcd/tls/client/etcd-client.crt --key /etc/etcd/tls/client/etcd-client.key --endpoints=localhost:2379 snapshot save /var/lib/data/snapshot.db To check the snapshot status, use the exec command in each etcd container by running the following command: USD oc exec -it <etcd_pod_name> -n <hosted_cluster_namespace> -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/data/snapshot.db Copy the snapshot data to a location where you can retrieve it later, such as an S3 bucket. See the following example. Note The following example uses signature version 2. If you are in a region that supports signature version 4, such as the us-east-2 region, use signature version 4. Otherwise, when copying the snapshot to an S3 bucket, the upload fails. Example BUCKET_NAME=somebucket FILEPATH="/USD{BUCKET_NAME}/USD{CLUSTER_NAME}-snapshot.db" CONTENT_TYPE="application/x-compressed-tar" DATE_VALUE=`date -R` SIGNATURE_STRING="PUT\n\nUSD{CONTENT_TYPE}\nUSD{DATE_VALUE}\nUSD{FILEPATH}" ACCESS_KEY=accesskey SECRET_KEY=secret SIGNATURE_HASH=`echo -en USD{SIGNATURE_STRING} | openssl sha1 -hmac USD{SECRET_KEY} -binary | base64` oc exec -it etcd-0 -n USD{HOSTED_CLUSTER_NAMESPACE} -- curl -X PUT -T "/var/lib/data/snapshot.db" \ -H "Host: USD{BUCKET_NAME}.s3.amazonaws.com" \ -H "Date: USD{DATE_VALUE}" \ -H "Content-Type: USD{CONTENT_TYPE}" \ -H "Authorization: AWS USD{ACCESS_KEY}:USD{SIGNATURE_HASH}" \ https://USD{BUCKET_NAME}.s3.amazonaws.com/USD{CLUSTER_NAME}-snapshot.db To restore the snapshot on a new cluster later, save the encryption secret that the hosted cluster references. Get the secret encryption key by entering the following command: USD oc get hostedcluster <hosted_cluster_name> -o=jsonpath='{.spec.secretEncryption.aescbc}' {"activeKey":{"name":"<hosted_cluster_name>-etcd-encryption-key"}} Save the secret encryption key by entering the following command: USD oc get secret <hosted_cluster_name>-etcd-encryption-key -o=jsonpath='{.data.key}' You can decrypt this key when restoring a snapshot on a new cluster. steps Restore the etcd snapshot. 8.3.2. Restoring an etcd snapshot on a hosted cluster If you have a snapshot of etcd from your hosted cluster, you can restore it. Currently, you can restore an etcd snapshot only during cluster creation. To restore an etcd snapshot, you modify the output from the create cluster --render command and define a restoreSnapshotURL value in the etcd section of the HostedCluster specification. Note The --render flag in the hcp create command does not render the secrets. To render the secrets, you must use both the --render and the --render-sensitive flags in the hcp create command. Prerequisites You took an etcd snapshot on a hosted cluster. Procedure On the aws command-line interface (CLI), create a pre-signed URL so that you can download your etcd snapshot from S3 without passing credentials to the etcd deployment: ETCD_SNAPSHOT=USD{ETCD_SNAPSHOT:-"s3://USD{BUCKET_NAME}/USD{CLUSTER_NAME}-snapshot.db"} ETCD_SNAPSHOT_URL=USD(aws s3 presign USD{ETCD_SNAPSHOT}) Modify the HostedCluster specification to refer to the URL: spec: etcd: managed: storage: persistentVolume: size: 4Gi type: PersistentVolume restoreSnapshotURL: - "USD{ETCD_SNAPSHOT_URL}" managementType: Managed Ensure that the secret that you referenced from the spec.secretEncryption.aescbc value contains the same AES key that you saved in the steps. 8.4. Disaster recovery for a hosted cluster in AWS You can recover a hosted cluster to the same region within Amazon Web Services (AWS). For example, you need disaster recovery when the upgrade of a management cluster fails and the hosted cluster is in a read-only state. Important Hosted control planes is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope . The disaster recovery process involves the following steps: Backing up the hosted cluster on the source management cluster Restoring the hosted cluster on a destination management cluster Deleting the hosted cluster from the source management cluster Your workloads remain running during the process. The Cluster API might be unavailable for a period, but that does not affect the services that are running on the worker nodes. Important Both the source management cluster and the destination management cluster must have the --external-dns flags to maintain the API server URL. That way, the server URL ends with https://api-sample-hosted.sample-hosted.aws.openshift.com . See the following example: Example: External DNS flags --external-dns-provider=aws \ --external-dns-credentials=<path_to_aws_credentials_file> \ --external-dns-domain-filter=<basedomain> If you do not include the --external-dns flags to maintain the API server URL, you cannot migrate the hosted cluster. 8.4.1. Overview of the backup and restore process The backup and restore process works as follows: On management cluster 1, which you can think of as the source management cluster, the control plane and workers interact by using the external DNS API. The external DNS API is accessible, and a load balancer sits between the management clusters. You take a snapshot of the hosted cluster, which includes etcd, the control plane, and the worker nodes. During this process, the worker nodes continue to try to access the external DNS API even if it is not accessible, the workloads are running, the control plane is saved in a local manifest file, and etcd is backed up to an S3 bucket. The data plane is active and the control plane is paused. On management cluster 2, which you can think of as the destination management cluster, you restore etcd from the S3 bucket and restore the control plane from the local manifest file. During this process, the external DNS API is stopped, the hosted cluster API becomes inaccessible, and any workers that use the API are unable to update their manifest files, but the workloads are still running. The external DNS API is accessible again, and the worker nodes use it to move to management cluster 2. The external DNS API can access the load balancer that points to the control plane. On management cluster 2, the control plane and worker nodes interact by using the external DNS API. The resources are deleted from management cluster 1, except for the S3 backup of etcd. If you try to set up the hosted cluster again on mangagement cluster 1, it will not work. 8.4.2. Backing up a hosted cluster To recover your hosted cluster in your target management cluster, you first need to back up all of the relevant data. Procedure Create a configmap file to declare the source management cluster by entering this command: USD oc create configmap mgmt-parent-cluster -n default --from-literal=from=USD{MGMT_CLUSTER_NAME} Shut down the reconciliation in the hosted cluster and in the node pools by entering these commands: USD PAUSED_UNTIL="true" USD oc patch -n USD{HC_CLUSTER_NS} hostedclusters/USD{HC_CLUSTER_NAME} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge USD oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver control-plane-operator USD PAUSED_UNTIL="true" USD oc patch -n USD{HC_CLUSTER_NS} hostedclusters/USD{HC_CLUSTER_NAME} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge USD oc patch -n USD{HC_CLUSTER_NS} nodepools/USD{NODEPOOLS} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge USD oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver control-plane-operator Back up etcd and upload the data to an S3 bucket by running this bash script: Tip Wrap this script in a function and call it from the main function. # ETCD Backup ETCD_PODS="etcd-0" if [ "USD{CONTROL_PLANE_AVAILABILITY_POLICY}" = "HighlyAvailable" ]; then ETCD_PODS="etcd-0 etcd-1 etcd-2" fi for POD in USD{ETCD_PODS}; do # Create an etcd snapshot oc exec -it USD{POD} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- env ETCDCTL_API=3 /usr/bin/etcdctl --cacert /etc/etcd/tls/client/etcd-client-ca.crt --cert /etc/etcd/tls/client/etcd-client.crt --key /etc/etcd/tls/client/etcd-client.key --endpoints=localhost:2379 snapshot save /var/lib/data/snapshot.db oc exec -it USD{POD} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/data/snapshot.db FILEPATH="/USD{BUCKET_NAME}/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db" CONTENT_TYPE="application/x-compressed-tar" DATE_VALUE=`date -R` SIGNATURE_STRING="PUT\n\nUSD{CONTENT_TYPE}\nUSD{DATE_VALUE}\nUSD{FILEPATH}" set +x ACCESS_KEY=USD(grep aws_access_key_id USD{AWS_CREDS} | head -n1 | cut -d= -f2 | sed "s/ //g") SECRET_KEY=USD(grep aws_secret_access_key USD{AWS_CREDS} | head -n1 | cut -d= -f2 | sed "s/ //g") SIGNATURE_HASH=USD(echo -en USD{SIGNATURE_STRING} | openssl sha1 -hmac "USD{SECRET_KEY}" -binary | base64) set -x # FIXME: this is pushing to the OIDC bucket oc exec -it etcd-0 -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- curl -X PUT -T "/var/lib/data/snapshot.db" \ -H "Host: USD{BUCKET_NAME}.s3.amazonaws.com" \ -H "Date: USD{DATE_VALUE}" \ -H "Content-Type: USD{CONTENT_TYPE}" \ -H "Authorization: AWS USD{ACCESS_KEY}:USD{SIGNATURE_HASH}" \ https://USD{BUCKET_NAME}.s3.amazonaws.com/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db done For more information about backing up etcd, see "Backing up and restoring etcd on a hosted cluster". Back up Kubernetes and OpenShift Container Platform objects by entering the following commands. You need to back up the following objects: HostedCluster and NodePool objects from the HostedCluster namespace HostedCluster secrets from the HostedCluster namespace HostedControlPlane from the Hosted Control Plane namespace Cluster from the Hosted Control Plane namespace AWSCluster , AWSMachineTemplate , and AWSMachine from the Hosted Control Plane namespace MachineDeployments , MachineSets , and Machines from the Hosted Control Plane namespace ControlPlane secrets from the Hosted Control Plane namespace USD mkdir -p USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS} USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD chmod 700 USD{BACKUP_DIR}/namespaces/ # HostedCluster USD echo "Backing Up HostedCluster Objects:" USD oc get hc USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml USD echo "--> HostedCluster" USD sed -i '' -e '/^status:USD/,USDd' USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml # NodePool USD oc get np USD{NODEPOOLS} -n USD{HC_CLUSTER_NS} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-USD{NODEPOOLS}.yaml USD echo "--> NodePool" USD sed -i '' -e '/^status:USD/,USD d' USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-USD{NODEPOOLS}.yaml # Secrets in the HC Namespace USD echo "--> HostedCluster Secrets:" for s in USD(oc get secret -n USD{HC_CLUSTER_NS} | grep "^USD{HC_CLUSTER_NAME}" | awk '{print USD1}'); do oc get secret -n USD{HC_CLUSTER_NS} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/secret-USD{s}.yaml done # Secrets in the HC Control Plane Namespace USD echo "--> HostedCluster ControlPlane Secrets:" for s in USD(oc get secret -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} | egrep -v "docker|service-account-token|oauth-openshift|NAME|token-USD{HC_CLUSTER_NAME}" | awk '{print USD1}'); do oc get secret -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/secret-USD{s}.yaml done # Hosted Control Plane USD echo "--> HostedControlPlane:" USD oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/hcp-USD{HC_CLUSTER_NAME}.yaml # Cluster USD echo "--> Cluster:" USD CL_NAME=USD(oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o jsonpath={.metadata.labels.\*} | grep USD{HC_CLUSTER_NAME}) USD oc get cluster USD{CL_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/cl-USD{HC_CLUSTER_NAME}.yaml # AWS Cluster USD echo "--> AWS Cluster:" USD oc get awscluster USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awscl-USD{HC_CLUSTER_NAME}.yaml # AWS MachineTemplate USD echo "--> AWS Machine Template:" USD oc get awsmachinetemplate USD{NODEPOOLS} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsmt-USD{HC_CLUSTER_NAME}.yaml # AWS Machines USD echo "--> AWS Machine:" USD CL_NAME=USD(oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o jsonpath={.metadata.labels.\*} | grep USD{HC_CLUSTER_NAME}) for s in USD(oc get awsmachines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --no-headers | grep USD{CL_NAME} | cut -f1 -d\ ); do oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} awsmachines USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsm-USD{s}.yaml done # MachineDeployments USD echo "--> HostedCluster MachineDeployments:" for s in USD(oc get machinedeployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do mdp_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machinedeployment-USD{mdp_name}.yaml done # MachineSets USD echo "--> HostedCluster MachineSets:" for s in USD(oc get machineset -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do ms_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machineset-USD{ms_name}.yaml done # Machines USD echo "--> HostedCluster Machine:" for s in USD(oc get machine -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do m_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machine-USD{m_name}.yaml done Clean up the ControlPlane routes by entering this command: USD oc delete routes -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all By entering that command, you enable the ExternalDNS Operator to delete the Route53 entries. Verify that the Route53 entries are clean by running this script: function clean_routes() { if [[ -z "USD{1}" ]];then echo "Give me the NS where to clean the routes" exit 1 fi # Constants if [[ -z "USD{2}" ]];then echo "Give me the Route53 zone ID" exit 1 fi ZONE_ID=USD{2} ROUTES=10 timeout=40 count=0 # This allows us to remove the ownership in the AWS for the API route oc delete route -n USD{1} --all while [ USD{ROUTES} -gt 2 ] do echo "Waiting for ExternalDNS Operator to clean the DNS Records in AWS Route53 where the zone id is: USD{ZONE_ID}..." echo "Try: (USD{count}/USD{timeout})" sleep 10 if [[ USDcount -eq timeout ]];then echo "Timeout waiting for cleaning the Route53 DNS records" exit 1 fi count=USD((count+1)) ROUTES=USD(aws route53 list-resource-record-sets --hosted-zone-id USD{ZONE_ID} --max-items 10000 --output json | grep -c USD{EXTERNAL_DNS_DOMAIN}) done } # SAMPLE: clean_routes "<HC ControlPlane Namespace>" "<AWS_ZONE_ID>" clean_routes "USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}" "USD{AWS_ZONE_ID}" Verification Check all of the OpenShift Container Platform objects and the S3 bucket to verify that everything looks as expected. steps Restore your hosted cluster. 8.4.3. Restoring a hosted cluster Gather all of the objects that you backed up and restore them in your destination management cluster. Prerequisites You backed up the data from your source management cluster. Tip Ensure that the kubeconfig file of the destination management cluster is placed as it is set in the KUBECONFIG variable or, if you use the script, in the MGMT2_KUBECONFIG variable. Use export KUBECONFIG=<Kubeconfig FilePath> or, if you use the script, use export KUBECONFIG=USD{MGMT2_KUBECONFIG} . Procedure Verify that the new management cluster does not contain any namespaces from the cluster that you are restoring by entering these commands: # Just in case USD export KUBECONFIG=USD{MGMT2_KUBECONFIG} USD BACKUP_DIR=USD{HC_CLUSTER_DIR}/backup # Namespace deletion in the destination Management cluster USD oc delete ns USD{HC_CLUSTER_NS} || true USD oc delete ns USD{HC_CLUSTER_NS}-{HC_CLUSTER_NAME} || true Re-create the deleted namespaces by entering these commands: # Namespace creation USD oc new-project USD{HC_CLUSTER_NS} USD oc new-project USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} Restore the secrets in the HC namespace by entering this command: USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/secret-* Restore the objects in the HostedCluster control plane namespace by entering these commands: # Secrets USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/secret-* # Cluster USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/hcp-* USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/cl-* If you are recovering the nodes and the node pool to reuse AWS instances, restore the objects in the HC control plane namespace by entering these commands: # AWS USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awscl-* USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsmt-* USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsm-* # Machines USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machinedeployment-* USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machineset-* USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machine-* Restore the etcd data and the hosted cluster by running this bash script: ETCD_PODS="etcd-0" if [ "USD{CONTROL_PLANE_AVAILABILITY_POLICY}" = "HighlyAvailable" ]; then ETCD_PODS="etcd-0 etcd-1 etcd-2" fi HC_RESTORE_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}-restore.yaml HC_BACKUP_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml HC_NEW_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}-new.yaml cat USD{HC_BACKUP_FILE} > USD{HC_NEW_FILE} cat > USD{HC_RESTORE_FILE} <<EOF restoreSnapshotURL: EOF for POD in USD{ETCD_PODS}; do # Create a pre-signed URL for the etcd snapshot ETCD_SNAPSHOT="s3://USD{BUCKET_NAME}/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db" ETCD_SNAPSHOT_URL=USD(AWS_DEFAULT_REGION=USD{MGMT2_REGION} aws s3 presign USD{ETCD_SNAPSHOT}) # FIXME no CLI support for restoreSnapshotURL yet cat >> USD{HC_RESTORE_FILE} <<EOF - "USD{ETCD_SNAPSHOT_URL}" EOF done cat USD{HC_RESTORE_FILE} if ! grep USD{HC_CLUSTER_NAME}-snapshot.db USD{HC_NEW_FILE}; then sed -i '' -e "/type: PersistentVolume/r USD{HC_RESTORE_FILE}" USD{HC_NEW_FILE} sed -i '' -e '/pausedUntil:/d' USD{HC_NEW_FILE} fi HC=USD(oc get hc -n USD{HC_CLUSTER_NS} USD{HC_CLUSTER_NAME} -o name || true) if [[ USD{HC} == "" ]];then echo "Deploying HC Cluster: USD{HC_CLUSTER_NAME} in USD{HC_CLUSTER_NS} namespace" oc apply -f USD{HC_NEW_FILE} else echo "HC Cluster USD{HC_CLUSTER_NAME} already exists, avoiding step" fi If you are recovering the nodes and the node pool to reuse AWS instances, restore the node pool by entering this command: USD oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-* Verification To verify that the nodes are fully restored, use this function: timeout=40 count=0 NODE_STATUS=USD(oc get nodes --kubeconfig=USD{HC_KUBECONFIG} | grep -v NotReady | grep -c "worker") || NODE_STATUS=0 while [ USD{NODE_POOL_REPLICAS} != USD{NODE_STATUS} ] do echo "Waiting for Nodes to be Ready in the destination MGMT Cluster: USD{MGMT2_CLUSTER_NAME}" echo "Try: (USD{count}/USD{timeout})" sleep 30 if [[ USDcount -eq timeout ]];then echo "Timeout waiting for Nodes in the destination MGMT Cluster" exit 1 fi count=USD((count+1)) NODE_STATUS=USD(oc get nodes --kubeconfig=USD{HC_KUBECONFIG} | grep -v NotReady | grep -c "worker") || NODE_STATUS=0 done steps Shut down and delete your cluster. 8.4.4. Deleting a hosted cluster from your source management cluster After you back up your hosted cluster and restore it to your destination management cluster, you shut down and delete the hosted cluster on your source management cluster. Prerequisites You backed up your data and restored it to your source management cluster. Tip Ensure that the kubeconfig file of the destination management cluster is placed as it is set in the KUBECONFIG variable or, if you use the script, in the MGMT_KUBECONFIG variable. Use export KUBECONFIG=<Kubeconfig FilePath> or, if you use the script, use export KUBECONFIG=USD{MGMT_KUBECONFIG} . Procedure Scale the deployment and statefulset objects by entering these commands: Important Do not scale the stateful set if the value of its spec.persistentVolumeClaimRetentionPolicy.whenScaled field is set to Delete , because this could lead to a loss of data. As a workaround, update the value of the spec.persistentVolumeClaimRetentionPolicy.whenScaled field to Retain . Ensure that no controllers exist that reconcile the stateful set and would return the value back to Delete , which could lead to a loss of data. # Just in case USD export KUBECONFIG=USD{MGMT_KUBECONFIG} # Scale down deployments USD oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 --all USD oc scale statefulset.apps -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 --all USD sleep 15 Delete the NodePool objects by entering these commands: NODEPOOLS=USD(oc get nodepools -n USD{HC_CLUSTER_NS} -o=jsonpath='{.items[?(@.spec.clusterName=="'USD{HC_CLUSTER_NAME}'")].metadata.name}') if [[ ! -z "USD{NODEPOOLS}" ]];then oc patch -n "USD{HC_CLUSTER_NS}" nodepool USD{NODEPOOLS} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' oc delete np -n USD{HC_CLUSTER_NS} USD{NODEPOOLS} fi Delete the machine and machineset objects by entering these commands: # Machines for m in USD(oc get machines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' || true oc delete -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} || true done USD oc delete machineset -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all || true Delete the cluster object by entering these commands: # Cluster USD C_NAME=USD(oc get cluster -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name) USD oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{C_NAME} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' USD oc delete cluster.cluster.x-k8s.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all Delete the AWS machines (Kubernetes objects) by entering these commands. Do not worry about deleting the real AWS machines. The cloud instances will not be affected. # AWS Machines for m in USD(oc get awsmachine.infrastructure.cluster.x-k8s.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name) do oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' || true oc delete -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} || true done Delete the HostedControlPlane and ControlPlane HC namespace objects by entering these commands: # Delete HCP and ControlPlane HC NS USD oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} hostedcontrolplane.hypershift.openshift.io USD{HC_CLUSTER_NAME} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' USD oc delete hostedcontrolplane.hypershift.openshift.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all USD oc delete ns USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} || true Delete the HostedCluster and HC namespace objects by entering these commands: # Delete HC and HC Namespace USD oc -n USD{HC_CLUSTER_NS} patch hostedclusters USD{HC_CLUSTER_NAME} -p '{"metadata":{"finalizers":null}}' --type merge || true USD oc delete hc -n USD{HC_CLUSTER_NS} USD{HC_CLUSTER_NAME} || true USD oc delete ns USD{HC_CLUSTER_NS} || true Verification To verify that everything works, enter these commands: # Validations USD export KUBECONFIG=USD{MGMT2_KUBECONFIG} USD oc get hc -n USD{HC_CLUSTER_NS} USD oc get np -n USD{HC_CLUSTER_NS} USD oc get pod -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD oc get machines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} # Inside the HostedCluster USD export KUBECONFIG=USD{HC_KUBECONFIG} USD oc get clusterversion USD oc get nodes steps Delete the OVN pods in the hosted cluster so that you can connect to the new OVN control plane that runs in the new management cluster: Load the KUBECONFIG environment variable with the hosted cluster's kubeconfig path. Enter this command: USD oc delete pod -n openshift-ovn-kubernetes --all

Commands:
oc rsh -n openshift-etcd -c etcd <etcd_pod_name>
sh-4.4# etcdctl endpoint status -w table
+------------------------------+-----------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +------------------------------+-----------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | https://192.168.1xxx.20:2379 | 8fxxxxxxxxxx | 3.5.12 | 123 MB | false | false | 10 | 180156 | 180156 | | | https://192.168.1xxx.21:2379 | a5xxxxxxxxxx | 3.5.12 | 122 MB | false | false | 10 | 180156 | 180156 | | | https://192.168.1xxx.22:2379 | 7cxxxxxxxxxx | 3.5.12 | 124 MB | true | false | 10 | 180156 | 180156 | | +-----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
oc get pods -l app=etcd -n openshift-etcd
NAME READY STATUS RESTARTS AGE etcd-0 2/2 Running 0 64m etcd-1 2/2 Running 0 45m etcd-2 1/2 CrashLoopBackOff 1 (5s ago) 64m
oc delete pods etcd-2 -n openshift-etcd
oc get pods -l app=etcd -n openshift-etcd
NAME READY STATUS RESTARTS AGE etcd-0 2/2 Running 0 67m etcd-1 2/2 Running 0 48m etcd-2 2/2 Running 0 2m2s
CLUSTER_NAME=my-cluster
HOSTED_CLUSTER_NAMESPACE=clusters
CONTROL_PLANE_NAMESPACE="USD{HOSTED_CLUSTER_NAMESPACE}-USD{CLUSTER_NAME}"
oc patch -n USD{HOSTED_CLUSTER_NAMESPACE} hostedclusters/USD{CLUSTER_NAME} -p '{"spec":{"pausedUntil":"true"}}' --type=merge
oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/kube-apiserver --replicas=0
oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/openshift-apiserver --replicas=0
oc scale -n USD{CONTROL_PLANE_NAMESPACE} deployment/openshift-oauth-apiserver --replicas=0
oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd
ETCD_POD=etcd-0
oc exec -n USD{CONTROL_PLANE_NAMESPACE} -c etcd -t USD{ETCD_POD} -- env ETCDCTL_API=3 /usr/bin/etcdctl --cacert /etc/etcd/tls/etcd-ca/ca.crt --cert /etc/etcd/tls/client/etcd-client.crt --key /etc/etcd/tls/client/etcd-client.key --endpoints=https://localhost:2379 snapshot save /var/lib/snapshot.db
oc exec -n USD{CONTROL_PLANE_NAMESPACE} -c etcd -t USD{ETCD_POD} -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/snapshot.db
oc cp -c etcd USD{CONTROL_PLANE_NAMESPACE}/USD{ETCD_POD}:/var/lib/snapshot.db /tmp/etcd.snapshot.db
oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd
oc cp -c etcd USD{CONTROL_PLANE_NAMESPACE}/USD{ETCD_POD}:/var/lib/data/member/snap/db /tmp/etcd.snapshot.db
oc scale -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd --replicas=0
oc delete -n USD{CONTROL_PLANE_NAMESPACE} pvc/data-etcd-1 pvc/data-etcd-2
ETCD_IMAGE=USD(oc get -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd -o jsonpath='{ .spec.template.spec.containers[0].image }')
cat << EOF | oc apply -n USD{CONTROL_PLANE_NAMESPACE} -f - apiVersion: apps/v1 kind: Deployment metadata: name: etcd-data spec: replicas: 1 selector: matchLabels: app: etcd-data template: metadata: labels: app: etcd-data spec: containers: - name: access image: USDETCD_IMAGE volumeMounts: - name: data mountPath: /var/lib command: - /usr/bin/bash args: - -c - |- while true; do sleep 1000 done volumes: - name: data persistentVolumeClaim: claimName: data-etcd-0 EOF
oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd-data
DATA_POD=USD(oc get -n USD{CONTROL_PLANE_NAMESPACE} pods --no-headers -l app=etcd-data -o name | cut -d/ -f2)
oc cp /tmp/etcd.snapshot.db USD{CONTROL_PLANE_NAMESPACE}/USD{DATA_POD}:/var/lib/restored.snap.db
oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- rm -rf /var/lib/data
oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- mkdir -p /var/lib/data
oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- etcdutl snapshot restore /var/lib/restored.snap.db --data-dir=/var/lib/data --skip-hash-check --name etcd-0 --initial-cluster-token=etcd-cluster --initial-cluster etcd-0=https://etcd-0.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380,etcd-1=https://etcd-1.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380,etcd-2=https://etcd-2.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380 --initial-advertise-peer-urls https://etcd-0.etcd-discovery.USD{CONTROL_PLANE_NAMESPACE}.svc:2380
oc exec -n USD{CONTROL_PLANE_NAMESPACE} USD{DATA_POD} -- rm /var/lib/restored.snap.db
oc delete -n USD{CONTROL_PLANE_NAMESPACE} deployment/etcd-data
oc scale -n USD{CONTROL_PLANE_NAMESPACE} statefulset/etcd --replicas=3
oc get -n USD{CONTROL_PLANE_NAMESPACE} pods -l app=etcd -w
oc scale deployment -n USD{CONTROL_PLANE_NAMESPACE} --replicas=3 kube-apiserver openshift-apiserver openshift-oauth-apiserver
oc patch -n USD{HOSTED_CLUSTER_NAMESPACE} hostedclusters/USD{CLUSTER_NAME} -p '{"spec":{"pausedUntil":""}}' --type=merge
oc patch -n clusters hostedclusters/<hosted_cluster_name> -p '{"spec":{"pausedUntil":"true"}}' --type=merge
oc scale deployment -n <hosted_cluster_namespace> --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver
oc exec -it <etcd_pod_name> -n <hosted_cluster_namespace> -- env ETCDCTL_API=3 /usr/bin/etcdctl --cacert /etc/etcd/tls/etcd-ca/ca.crt --cert /etc/etcd/tls/client/etcd-client.crt --key /etc/etcd/tls/client/etcd-client.key --endpoints=localhost:2379 snapshot save /var/lib/data/snapshot.db
oc exec -it <etcd_pod_name> -n <hosted_cluster_namespace> -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/data/snapshot.db
BUCKET_NAME=somebucket FILEPATH="/USD{BUCKET_NAME}/USD{CLUSTER_NAME}-snapshot.db" CONTENT_TYPE="application/x-compressed-tar" DATE_VALUE=`date -R` SIGNATURE_STRING="PUT\n\nUSD{CONTENT_TYPE}\nUSD{DATE_VALUE}\nUSD{FILEPATH}" ACCESS_KEY=accesskey SECRET_KEY=secret SIGNATURE_HASH=`echo -en USD{SIGNATURE_STRING} | openssl sha1 -hmac USD{SECRET_KEY} -binary | base64` exec -it etcd-0 -n USD{HOSTED_CLUSTER_NAMESPACE} -- curl -X PUT -T "/var/lib/data/snapshot.db" -H "Host: USD{BUCKET_NAME}.s3.amazonaws.com" -H "Date: USD{DATE_VALUE}" -H "Content-Type: USD{CONTENT_TYPE}" -H "Authorization: AWS USD{ACCESS_KEY}:USD{SIGNATURE_HASH}" https://USD{BUCKET_NAME}.s3.amazonaws.com/USD{CLUSTER_NAME}-snapshot.db
oc get hostedcluster <hosted_cluster_name> -o=jsonpath='{.spec.secretEncryption.aescbc}' {"activeKey":{"name":"<hosted_cluster_name>-etcd-encryption-key"}}
oc get secret <hosted_cluster_name>-etcd-encryption-key -o=jsonpath='{.data.key}'
ETCD_SNAPSHOT=USD{ETCD_SNAPSHOT:-"s3://USD{BUCKET_NAME}/USD{CLUSTER_NAME}-snapshot.db"} ETCD_SNAPSHOT_URL=USD(aws s3 presign USD{ETCD_SNAPSHOT})
spec: etcd: managed: storage: persistentVolume: size: 4Gi type: PersistentVolume restoreSnapshotURL: - "USD{ETCD_SNAPSHOT_URL}" managementType: Managed
--external-dns-provider=aws --external-dns-credentials=<path_to_aws_credentials_file> --external-dns-domain-filter=<basedomain>
oc create configmap mgmt-parent-cluster -n default --from-literal=from=USD{MGMT_CLUSTER_NAME}
PAUSED_UNTIL="true" oc patch -n USD{HC_CLUSTER_NS} hostedclusters/USD{HC_CLUSTER_NAME} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver control-plane-operator
PAUSED_UNTIL="true" oc patch -n USD{HC_CLUSTER_NS} hostedclusters/USD{HC_CLUSTER_NAME} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge oc patch -n USD{HC_CLUSTER_NS} nodepools/USD{NODEPOOLS} -p '{"spec":{"pausedUntil":"'USD{PAUSED_UNTIL}'"}}' --type=merge oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 kube-apiserver openshift-apiserver openshift-oauth-apiserver control-plane-operator
ETCD Backup ETCD_PODS="etcd-0" if [ "USD{CONTROL_PLANE_AVAILABILITY_POLICY}" = "HighlyAvailable" ]; then ETCD_PODS="etcd-0 etcd-1 etcd-2" fi for POD in USD{ETCD_PODS}; do # Create an etcd snapshot oc exec -it USD{POD} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- env ETCDCTL_API=3 /usr/bin/etcdctl --cacert /etc/etcd/tls/client/etcd-client-ca.crt --cert /etc/etcd/tls/client/etcd-client.crt --key /etc/etcd/tls/client/etcd-client.key --endpoints=localhost:2379 snapshot save /var/lib/data/snapshot.db oc exec -it USD{POD} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- env ETCDCTL_API=3 /usr/bin/etcdctl -w table snapshot status /var/lib/data/snapshot.db FILEPATH="/USD{BUCKET_NAME}/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db" CONTENT_TYPE="application/x-compressed-tar" DATE_VALUE=`date -R` SIGNATURE_STRING="PUT\n\nUSD{CONTENT_TYPE}\nUSD{DATE_VALUE}\nUSD{FILEPATH}" set +x ACCESS_KEY=USD(grep aws_access_key_id USD{AWS_CREDS} | head -n1 | cut -d= -f2 | sed "s/ //g") SECRET_KEY=USD(grep aws_secret_access_key USD{AWS_CREDS} | head -n1 | cut -d= -f2 | sed "s/ //g") SIGNATURE_HASH=USD(echo -en USD{SIGNATURE_STRING} | openssl sha1 -hmac "USD{SECRET_KEY}" -binary | base64) set -x # FIXME: this is pushing to the OIDC bucket oc exec -it etcd-0 -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -- curl -X PUT -T "/var/lib/data/snapshot.db" -H "Host: USD{BUCKET_NAME}.s3.amazonaws.com" -H "Date: USD{DATE_VALUE}" -H "Content-Type: USD{CONTENT_TYPE}" -H "Authorization: AWS USD{ACCESS_KEY}:USD{SIGNATURE_HASH}" https://USD{BUCKET_NAME}.s3.amazonaws.com/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db done
mkdir -p USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS} USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} chmod 700 USD{BACKUP_DIR}/namespaces/ HostedCluster echo "Backing Up HostedCluster Objects:" oc get hc USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml echo "--> HostedCluster" sed -i '' -e '/^status:USD/,USDd' USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml NodePool oc get np USD{NODEPOOLS} -n USD{HC_CLUSTER_NS} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-USD{NODEPOOLS}.yaml echo "--> NodePool" sed -i '' -e '/^status:USD/,USD d' USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-USD{NODEPOOLS}.yaml Secrets in the HC Namespace echo "--> HostedCluster Secrets:" for s in USD(oc get secret -n USD{HC_CLUSTER_NS} | grep "^USD{HC_CLUSTER_NAME}" | awk '{print USD1}'); do oc get secret -n USD{HC_CLUSTER_NS} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/secret-USD{s}.yaml done Secrets in the HC Control Plane Namespace echo "--> HostedCluster ControlPlane Secrets:" for s in USD(oc get secret -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} | egrep -v "docker|service-account-token|oauth-openshift|NAME|token-USD{HC_CLUSTER_NAME}" | awk '{print USD1}'); do oc get secret -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/secret-USD{s}.yaml done Hosted Control Plane echo "--> HostedControlPlane:" oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/hcp-USD{HC_CLUSTER_NAME}.yaml Cluster echo "--> Cluster:" CL_NAME=USD(oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o jsonpath={.metadata.labels.\*} | grep USD{HC_CLUSTER_NAME}) oc get cluster USD{CL_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/cl-USD{HC_CLUSTER_NAME}.yaml AWS Cluster echo "--> AWS Cluster:" oc get awscluster USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awscl-USD{HC_CLUSTER_NAME}.yaml AWS MachineTemplate echo "--> AWS Machine Template:" oc get awsmachinetemplate USD{NODEPOOLS} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsmt-USD{HC_CLUSTER_NAME}.yaml AWS Machines echo "--> AWS Machine:" CL_NAME=USD(oc get hcp USD{HC_CLUSTER_NAME} -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o jsonpath={.metadata.labels.\*} | grep USD{HC_CLUSTER_NAME}) for s in USD(oc get awsmachines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --no-headers | grep USD{CL_NAME} | cut -f1 -d\ ); do oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} awsmachines USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsm-USD{s}.yaml done MachineDeployments echo "--> HostedCluster MachineDeployments:" for s in USD(oc get machinedeployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do mdp_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machinedeployment-USD{mdp_name}.yaml done MachineSets echo "--> HostedCluster MachineSets:" for s in USD(oc get machineset -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do ms_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machineset-USD{ms_name}.yaml done Machines echo "--> HostedCluster Machine:" for s in USD(oc get machine -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do m_name=USD(echo USD{s} | cut -f 2 -d /) oc get -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USDs -o yaml > USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machine-USD{m_name}.yaml done
oc delete routes -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all
function clean_routes() { if [[ -z "USD{1}" ]];then echo "Give me the NS where to clean the routes" exit 1 fi # Constants if [[ -z "USD{2}" ]];then echo "Give me the Route53 zone ID" exit 1 fi ZONE_ID=USD{2} ROUTES=10 timeout=40 count=0 # This allows us to remove the ownership in the AWS for the API route oc delete route -n USD{1} --all while [ USD{ROUTES} -gt 2 ] do echo "Waiting for ExternalDNS Operator to clean the DNS Records in AWS Route53 where the zone id is: USD{ZONE_ID}..." echo "Try: (USD{count}/USD{timeout})" sleep 10 if [[ USDcount -eq timeout ]];then echo "Timeout waiting for cleaning the Route53 DNS records" exit 1 fi count=USD((count+1)) ROUTES=USD(aws route53 list-resource-record-sets --hosted-zone-id USD{ZONE_ID} --max-items 10000 --output json | grep -c USD{EXTERNAL_DNS_DOMAIN}) done } SAMPLE: clean_routes "<HC ControlPlane Namespace>" "<AWS_ZONE_ID>" clean_routes "USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}" "USD{AWS_ZONE_ID}"
Just in case export KUBECONFIG=USD{MGMT2_KUBECONFIG} BACKUP_DIR=USD{HC_CLUSTER_DIR}/backup Namespace deletion in the destination Management cluster oc delete ns USD{HC_CLUSTER_NS} || true oc delete ns USD{HC_CLUSTER_NS}-{HC_CLUSTER_NAME} || true
Namespace creation oc new-project USD{HC_CLUSTER_NS} oc new-project USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}
oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/secret-*
Secrets oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/secret-* Cluster oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/hcp-* oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/cl-*
AWS oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awscl-* oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsmt-* oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/awsm-* Machines oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machinedeployment-* oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machineset-* oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME}/machine-*
ETCD_PODS="etcd-0" if [ "USD{CONTROL_PLANE_AVAILABILITY_POLICY}" = "HighlyAvailable" ]; then ETCD_PODS="etcd-0 etcd-1 etcd-2" fi HC_RESTORE_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}-restore.yaml HC_BACKUP_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}.yaml HC_NEW_FILE=USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/hc-USD{HC_CLUSTER_NAME}-new.yaml cat USD{HC_BACKUP_FILE} > USD{HC_NEW_FILE} cat > USD{HC_RESTORE_FILE} <<EOF restoreSnapshotURL: EOF for POD in USD{ETCD_PODS}; do # Create a pre-signed URL for the etcd snapshot ETCD_SNAPSHOT="s3://USD{BUCKET_NAME}/USD{HC_CLUSTER_NAME}-USD{POD}-snapshot.db" ETCD_SNAPSHOT_URL=USD(AWS_DEFAULT_REGION=USD{MGMT2_REGION} aws s3 presign USD{ETCD_SNAPSHOT}) # FIXME no CLI support for restoreSnapshotURL yet cat >> USD{HC_RESTORE_FILE} <<EOF - "USD{ETCD_SNAPSHOT_URL}" EOF done cat USD{HC_RESTORE_FILE} if ! grep USD{HC_CLUSTER_NAME}-snapshot.db USD{HC_NEW_FILE}; then sed -i '' -e "/type: PersistentVolume/r USD{HC_RESTORE_FILE}" USD{HC_NEW_FILE} sed -i '' -e '/pausedUntil:/d' USD{HC_NEW_FILE} fi HC=USD(oc get hc -n USD{HC_CLUSTER_NS} USD{HC_CLUSTER_NAME} -o name || true) if [[ USD{HC} == "" ]];then echo "Deploying HC Cluster: USD{HC_CLUSTER_NAME} in USD{HC_CLUSTER_NS} namespace" oc apply -f USD{HC_NEW_FILE} else echo "HC Cluster USD{HC_CLUSTER_NAME} already exists, avoiding step" fi
oc apply -f USD{BACKUP_DIR}/namespaces/USD{HC_CLUSTER_NS}/np-*
timeout=40 count=0 NODE_STATUS=USD(oc get nodes --kubeconfig=USD{HC_KUBECONFIG} | grep -v NotReady | grep -c "worker") || NODE_STATUS=0 while [ USD{NODE_POOL_REPLICAS} != USD{NODE_STATUS} ] do echo "Waiting for Nodes to be Ready in the destination MGMT Cluster: USD{MGMT2_CLUSTER_NAME}" echo "Try: (USD{count}/USD{timeout})" sleep 30 if [[ USDcount -eq timeout ]];then echo "Timeout waiting for Nodes in the destination MGMT Cluster" exit 1 fi count=USD((count+1)) NODE_STATUS=USD(oc get nodes --kubeconfig=USD{HC_KUBECONFIG} | grep -v NotReady | grep -c "worker") || NODE_STATUS=0 done
Just in case export KUBECONFIG=USD{MGMT_KUBECONFIG} Scale down deployments oc scale deployment -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 --all oc scale statefulset.apps -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --replicas=0 --all sleep 15
NODEPOOLS=USD(oc get nodepools -n USD{HC_CLUSTER_NS} -o=jsonpath='{.items[?(@.spec.clusterName=="'USD{HC_CLUSTER_NAME}'")].metadata.name}') if [[ ! -z "USD{NODEPOOLS}" ]];then oc patch -n "USD{HC_CLUSTER_NS}" nodepool USD{NODEPOOLS} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' oc delete np -n USD{HC_CLUSTER_NS} USD{NODEPOOLS} fi
Machines for m in USD(oc get machines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name); do oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' || true oc delete -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} || true done oc delete machineset -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all || true
Cluster C_NAME=USD(oc get cluster -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name) oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{C_NAME} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' oc delete cluster.cluster.x-k8s.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all
AWS Machines for m in USD(oc get awsmachine.infrastructure.cluster.x-k8s.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} -o name) do oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' || true oc delete -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} USD{m} || true done
Delete HCP and ControlPlane HC NS oc patch -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} hostedcontrolplane.hypershift.openshift.io USD{HC_CLUSTER_NAME} --type=json --patch='[ { "op":"remove", "path": "/metadata/finalizers" }]' oc delete hostedcontrolplane.hypershift.openshift.io -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} --all oc delete ns USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} || true
Delete HC and HC Namespace oc -n USD{HC_CLUSTER_NS} patch hostedclusters USD{HC_CLUSTER_NAME} -p '{"metadata":{"finalizers":null}}' --type merge || true oc delete hc -n USD{HC_CLUSTER_NS} USD{HC_CLUSTER_NAME} || true oc delete ns USD{HC_CLUSTER_NS} || true
Validations export KUBECONFIG=USD{MGMT2_KUBECONFIG} oc get hc -n USD{HC_CLUSTER_NS} oc get np -n USD{HC_CLUSTER_NS} oc get pod -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} oc get machines -n USD{HC_CLUSTER_NS}-USD{HC_CLUSTER_NAME} Inside the HostedCluster export KUBECONFIG=USD{HC_KUBECONFIG} oc get clusterversion oc get nodes
oc delete pod -n openshift-ovn-kubernetes --all