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KubeBlocks for PostgreSQL

Introduction

PostgreSQL introduction

Cluster Management

Create and connect
Scale
Expand volume
Restart
Stop/Start
Switchover
Delete protection

Configuration

Configure cluster parameters

PostgreSQL Connection Pool

Connection pool

High Availability

High Availability for PostgreSQL
  1. Steps

Restart PostgreSQL cluster

You can restart all pods of the cluster. When an exception occurs in a database, you can try to restart it.

NOTE

The pod role may change after the cluster restarts.

Steps

  1. Restart a cluster.

    kubectl apply -f - <<EOF apiVersion: apps.kubeblocks.io/v1alpha1 kind: OpsRequest metadata: name: ops-restart namespace: demo spec: clusterName: mycluster type: Restart restart: - componentName: postgresql EOF
  2. Check the pod and operation status to validate the restarting.

    kubectl get pod -n demo > NAME READY STATUS RESTARTS AGE mycluster-postgresql-0 3/4 Terminating 0 5m32s mycluster-postgresql-1 4/4 Running 0 6m36s kubectl get ops ops-restart -n demo > NAME TYPE CLUSTER STATUS PROGRESS AGE ops-restart Restart mycluster Succeed 1/1 3m26s

    During the restarting process, there are two status types for pods.

    • STATUS=Terminating: it means the cluster restart is in progress.
    • STATUS=Running: it means the cluster has been restarted.
  1. Configure the values of components and ttlSecondsAfterSucceed and run the command below to restart a specified cluster.

    kbcli cluster restart mycluster -n demo --components="postgresql" --ttlSecondsAfterSucceed=30
    • components describes the component name that needs to be restarted.
    • ttlSecondsAfterSucceed describes the time to live of an OpsRequest job after the restarting succeeds.
  2. Validate the restarting.

    Run the command below to check the cluster status to check the restarting status.

    kbcli cluster list mycluster -n demo > NAME NAMESPACE CLUSTER-DEFINITION VERSION TERMINATION-POLICY STATUS CREATED-TIME mycluster demo postgresql postgresql-14.8.0 Delete Running Sep 28,2024 16:57 UTC+0800
    • STATUS=Updating: it means the cluster restart is in progress.
    • STATUS=Running: it means the cluster has been restarted.

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