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  1. WildFly WIP
  2. WFWIP-254

Changes in volumeClaimTemplate triggers creation of a new statefulset

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    Description

      Adding a volumeClaimTemplate, or existing an existing one leads to the re-creation of statefulset -> all pods are immediately terminated and route is unavailable until some of the pods is ready again.

      reproduce

      • deploy operator
        ./build/run-openshift.sh
      • deploy updatedquickstart project from operator repository
        cat deploy/crds/quickstart-cr.yaml
        apiVersion: wildfly.org/v1alpha1
        kind: WildFlyServer
        metadata:
          name: quickstart
        spec:
          applicationImage: "quay.io/wildfly-quickstarts/wildfly-operator-quickstart:18.0"
          replicas: 2
          storage:
            volumeClaimTemplate:
              spec:
                resources:
                  requests:
                    storage: 1Mi
        oc apply -f deploy/crds/quickstart-cr.yaml
      • wait for both replicas to be ready & print ss creation timestamp & verify application readiness
        oc get pods
        NAME                                READY   STATUS    RESTARTS   AGE
        quickstart-0                        1/1     Running   0          2m48s
        quickstart-1                        1/1     Running   0          2m48s
        wildfly-operator-54455dbcd8-flnd4   1/1     Running   0          69m
        
        oc get statefulset.apps/quickstart --template={{.metadata.creationTimestamp}}
        2019-10-17T13:55:03Z
        
        curl quickstart-route-wildfly.apps-crc.testing
        {"ip":"10.128.1.36"}
        
      • edit the storage field (e.g. storage: 1Mi -> storage: 2Mi)
      • notice the both pods are terminating, stateful set creation timestamp has changed and application route is not available until one of the pods will start again (could take a minute)
        oc get pods
        NAME                                READY   STATUS        RESTARTS   AGE
        quickstart-0                        1/1     Terminating   0          5m42s
        quickstart-1                        1/1     Terminating   0          5m42s
        wildfly-operator-54455dbcd8-flnd4   1/1     Running       0          72m
        
        oc get statefulset.apps/quickstart --template={{.metadata.creationTimestamp}}
        2019-10-17T14:00:44Z
        
        curl quickstart-route-wildfly.apps-crc.testing
        ...
        Application is not available
        ...
        

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            jmesnil1@redhat.com Jeff Mesnil
            pkremens@redhat.com Petr Kremensky (Inactive)
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              Created:
              Updated:
              Resolved: