Create a Pulsar Cluster

Introduction

KubeBlocks can quickly integrate new engines through good abstraction. The functions tested in KubeBlocks include Pulsar cluster creation and deletion, vertical and horizontal scaling of Pulsar cluster components, storage expansion, restart, and configuration changes.

KubeBlocks supports Pulsar's daily operations, including basic lifecycle operations such as cluster creation, deletion, and restart, as well as advanced operations such as horizontal and vertical scaling, storage expansion, configuration changes, and monitoring.

Environment Recommendation

Refer to the Pulsar official document for the configuration, such as memory, cpu, and storage, of each component.

Components	Replicas
zookeeper	1 for test environment or 3 for production environment
bookies	at least 3 for test environment, at lease 4 for production environment
broker	at least 1, for production environment, 3 replicas recommended
recovery (Optional)	1; if autoRecovery is not enabled for bookie, at least 3 replicas needed
proxy (Optional)	1; and for production environment, 3 replicas needed

Before you start

• Install KubeBlocks by kbcli or by Helm.

• Check whether the Pulsar Addon is enabled. If this Addon is disabled, enable it first.

• View all the database types and versions available for creating a cluster.

  kbcli

  kbcli clusterdefinition list
  kbcli clusterversion list

  kubectl

  kubectl get clusterdefinition pulsar
  >
  NAME    TOPOLOGIES                                        SERVICEREFS    STATUS      AGE
  pulsar  pulsar-basic-cluster,pulsar-enhanced-cluster                     Available   16m

  View all available versions for creating a cluster.

  kubectl get clusterversions -l clusterdefinition.kubeblocks.io/name=pulsar
  >
  NAME            CLUSTER-DEFINITION   STATUS      AGE
  pulsar-2.11.2   pulsar               Available   16m
  pulsar-3.0.2    pulsar               Available   16m

• To keep things isolated, create a separate namespace called demo.

  kubectl create namespace demo
  >
  namespace/demo created

Create Pulsar cluster

1. Create the Pulsar cluster template file values-production.yaml for helm locally.

   Copy the following information to the local file values-production.yaml.

   ## Bookies configuration
   bookies:
     resources:
       limits:
         memory: 8Gi
       requests:
         cpu: 2
         memory: 8Gi
   
     persistence:
       data:
         storageClassName: kb-default-sc
         size: 128Gi
       log:
         storageClassName: kb-default-sc
         size: 64Gi
   
   ## Zookeeper configuration
   zookeeper:
     resources:
       limits:
         memory: 2Gi
       requests:
         cpu: 1
         memory: 2Gi
   
     persistence:
       data:
         storageClassName: kb-default-sc
         size: 20Gi
       log:
         storageClassName: kb-default-sc 
         size: 20Gi
        
   broker:
     replicaCount: 3
     resources:
       limits:
         memory: 8Gi
       requests:
         cpu: 2
         memory: 8Gi

2. Create a cluster.

   • Option 1: (Recommended) Create pulsar cluster by values-production.yaml and enable monitor.

     Configuration:

     • broker: 3 replicas
     • bookies: 4 replicas
     • zookeeper: 3 replicas

     helm install mycluster kubeblocks/pulsar-cluster --version "x.x.x" -f values-production.yaml --set monitor.enabled=true --namespace=demo

   • Option 2: Create pulsar cluster with proxy.

     Configuration:

     • proxy: 3 replicas
     • broker: 3 replicas
     • bookies: 4 replicas
     • zookeeper: 3 replicas

     helm install mycluster kubeblocks/pulsar-cluster --version "x.x.x" -f values-production.yaml --set proxy.enable=true  --set monitor.enabled=true --namespace=demo

   • Option 3: Create pulsar cluster with proxy and deploy bookies-recovery component.

     Configuration:

     • proxy: 3 replicas
     • broker: 3 replicas
     • bookies: 4 replicas
     • zookeeper: 3 replicas
     • bookies-recovery: 3 replicas

     helm install mycluster kubeblocks/pulsar-cluster --version "x.x.x" -f values-production.yaml --set proxy.enable=true --set bookiesRecovery.enable=true --set monitor.enabled=true --namespace=demo 

   • Option 4: Create pulsar cluster and specify bookies and zookeeper storage parameters.

     Configuration:

     • broker: 3 replicas
     • bookies: 4 replicas
     • zookeeper: 3 replicas

     helm install mycluster kubeblocks/pulsar-cluster --version "x.x.x" -f values-production.yaml --set bookies.persistence.data.storageClassName=<sc name>,bookies.persistence.log.storageClassName=<sc name>,zookeeper.persistence.data.storageClassName=<sc name>,zookeeper.persistence.log.storageClassName=<sc name> --set monitor.enabled=true --namespace=demo

   You can specify the storage name <sc name>.

3. Verify the cluster created.

   kubectl get cluster mycluster -n demo

   When the status is Running, the cluster is created successfully.