Chapter 4. Creating Data Grid clusters

Procedure

1. Run the infinispan create cluster command.

   For example, create a Data Grid cluster with two pods as follows:

   oc infinispan create cluster --replicas=3 -Pservice.type=DataGrid infinispan

   Tip

   Add the --version argument to control the Data Grid version of your cluster. For example, --version=8.4.6-1. If you don’t specify the version, Data Grid Operator creates cluster with the latest supported Data Grid version.

2. Watch Data Grid Operator create the Data Grid pods.

   oc get pods -w

Procedure

1. Create a YAML file that defines your Infinispan CR.

   For example, create a my_infinispan.yaml file that changes the number of Data Grid pods to two:

   cat > cr_minimal.yaml<<EOF
   apiVersion: infinispan.org/v1
   kind: Infinispan
   metadata:
     name: infinispan
   spec:
     replicas: 2
     version: <Data Grid_version>
     service:
       type: DataGrid
   EOF

2. Apply your Infinispan CR.

   oc apply -f my_infinispan.yaml

3. Watch Data Grid Operator scale the Data Grid pods.

   oc get pods -w

Procedure

1. Change the spec.replicas field to 0 to stop the Data Grid cluster.

   spec:
     replicas: 0

2. Ensure you have the correct number of pods before you restart the cluster.

   oc get infinispan infinispan -o=jsonpath='{.status.replicasWantedAtRestart}'

3. Change the spec.replicas field to the same number of pods to restart the Data Grid cluster.

   spec:
     replicas: 6