coherence-operator

Installing Multiple Coherence Clusters with One Operator

This sample shows how Coherence Operator can manage two or more Coherence clusters, and how you can see the logs from both clusters using Kibana.

Return to Coherence Deployments samples / Return to samples

Installation Steps

1. Install Coherence Operator.

   Run the following command to install coherence-operator with log capture enabled:

   Note: If you have already installed the coherence-operator without log capture enabled, you must delete it using helm delete coherence-operator --purge before continuing.

   $ helm install \
      --namespace sample-coherence-ns \
      --set imagePullSecrets=sample-coherence-secret \
      --name coherence-operator \
      --set logCaptureEnabled=true \
      --set "targetNamespaces={sample-coherence-ns}" \
      coherence/coherence-operator  
   

   After installation, run the following command to list the pods:

   $ kubectl get pods -n sample-coherence-ns
   

   Along with coherence-operator, the command also returns the elasticsearch and kibana pods.

   NAME                                  READY   STATUS    RESTARTS   AGE
   coherence-operator-7f596c6796-nns9n   2/2     Running   0          41s
   elasticsearch-5b5474865c-86888        1/1     Running   0          41s
   kibana-f6955c4b9-4ndsh                1/1     Running   0          41s
   

2. Install the first Coherence cluster, cluster-a.

   For each cluster, create only two pods to save resources.

   $ helm install \
      --namespace sample-coherence-ns \
      --name cluster-a \
      --set clusterSize=2 \
      --set cluster=cluster-a \
      --set imagePullSecrets=sample-coherence-secret \
      --set logCaptureEnabled=true \
      coherence/coherence
   

3. Install the second Coherence cluster, cluster-b

   For each cluster, create only two pods to save resources.

   $ helm install \
      --namespace sample-coherence-ns \
      --name cluster-b \
      --set clusterSize=2 \
      --set cluster=cluster-b \
      --set imagePullSecrets=sample-coherence-secret \
      --set logCaptureEnabled=true \
      coherence/coherence
   

Access Kibana

Use the port-forward-kibana.sh script in the ../../common directory to view log messages.

1. Start port forwarding.

   $ ./port-forward-kibana.sh sample-coherence-ns
   

   Forwarding from 127.0.0.1:5601 -> 5601
   Forwarding from [::1]:5601 -> 5601
   

2. Access Kibana using the following URL:

   http://127.0.0.1:5601/

   Note: It may take up to five minutes for the data to reach the elasticsearch instance.

   Once logged in, click Dashboard on the left and choose Coherence Cluster - All Messages. You should see messages from both clusters, cluster-a and cluster-b.

   

Uninstall the Charts

Run the following command to delete the charts installed in this sample.

$ helm delete cluster-a cluster-b --purge

Before starting another sample, ensure that all pods are removed from the previous sample. To remove coherence-operator, use the helm delete command.

This site is open source. Improve this page.