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Kuttl test to create a cluster and resize the PVC
This test creates two simple clusters with a single primary and a repo host. In the first cluster we create data then increase the size of the pvc. Then we check that the pvc size has changed, the size matches the new expected side and the data is still present. In the second cluster we attempt decrease the size of the volume and expect the PersistentVolumeError.
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‎testing/kuttl/e2e-other/resize-volume/00-assert.yaml‎

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# Ensure that the default StorageClass supports VolumeExpansion
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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annotations:
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storageclass.kubernetes.io/is-default-class: "true"
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allowVolumeExpansion: true

‎testing/kuttl/e2e-other/resize-volume/01--cluster.yaml‎

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apiVersion: postgres-operator.crunchydata.com/v1beta1
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kind: PostgresCluster
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metadata:
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name: resize-volume-up
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spec:
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postgresVersion: ${KUTTL_PG_VERSION}
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instances:
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- name: instance1
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dataVolumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 1Gi
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backups:
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pgbackrest:
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repos:
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- name: repo1
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volume:
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volumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 1Gi

‎testing/kuttl/e2e-other/resize-volume/01-assert.yaml‎

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apiVersion: postgres-operator.crunchydata.com/v1beta1
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kind: PostgresCluster
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metadata:
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name: resize-volume-up
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status:
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instances:
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- name: instance1
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readyReplicas: 1
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replicas: 1
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updatedReplicas: 1
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---
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apiVersion: batch/v1
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kind: Job
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metadata:
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labels:
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postgres-operator.crunchydata.com/cluster: resize-volume-up
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postgres-operator.crunchydata.com/pgbackrest-backup: replica-create
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status:
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succeeded: 1
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: resize-volume-up-primary
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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labels:
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postgres-operator.crunchydata.com/cluster: resize-volume-up
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postgres-operator.crunchydata.com/instance-set: instance1
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spec:
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resources:
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requests:
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storage: 1Gi
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status:
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accessModes:
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- ReadWriteOnce
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capacity:
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storage: 1Gi
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phase: Bound
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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labels:
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postgres-operator.crunchydata.com/cluster: resize-volume-up
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postgres-operator.crunchydata.com/data: pgbackrest
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postgres-operator.crunchydata.com/pgbackrest-repo: repo1
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spec:
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resources:
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requests:
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storage: 1Gi
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status:
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accessModes:
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- ReadWriteOnce
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capacity:
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storage: 1Gi
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phase: Bound

‎testing/kuttl/e2e-other/resize-volume/02--create-data.yaml‎

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---
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# Create some data that should be present after resizing.
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: create-data
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labels: { postgres-operator-test: kuttl }
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spec:
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backoffLimit: 3
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template:
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metadata:
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labels: { postgres-operator-test: kuttl }
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spec:
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restartPolicy: Never
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containers:
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- name: psql
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image: ${KUTTL_PSQL_IMAGE}
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env:
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- name: PGURI
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valueFrom: { secretKeyRef: { name: resize-volume-up-pguser-resize-volume-up, key: uri } }
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# Do not wait indefinitely.
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- { name: PGCONNECT_TIMEOUT, value: '5' }
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command:
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- psql
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- $(PGURI)
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- --set=ON_ERROR_STOP=1
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- --command
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- |
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CREATE TABLE important (data) AS VALUES ('treasure');

‎testing/kuttl/e2e-other/resize-volume/02-assert.yaml‎

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---
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: create-data
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status:
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succeeded: 1

‎testing/kuttl/e2e-other/resize-volume/03--resize.yaml‎

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apiVersion: postgres-operator.crunchydata.com/v1beta1
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kind: PostgresCluster
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metadata:
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name: resize-volume-up
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spec:
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postgresVersion: ${KUTTL_PG_VERSION}
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instances:
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- name: instance1
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dataVolumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 2Gi
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backups:
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pgbackrest:
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repos:
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- name: repo1
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volume:
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volumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 2Gi

‎testing/kuttl/e2e-other/resize-volume/03-assert.yaml‎

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# We know that the PVC sizes have change so now we can check that they have been
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# updated to have the expected size
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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labels:
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postgres-operator.crunchydata.com/cluster: resize-volume-up
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postgres-operator.crunchydata.com/instance-set: instance1
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spec:
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resources:
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requests:
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storage: 2Gi
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status:
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accessModes:
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- ReadWriteOnce
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capacity:
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storage: 2Gi
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phase: Bound
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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labels:
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postgres-operator.crunchydata.com/cluster: resize-volume-up
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postgres-operator.crunchydata.com/data: pgbackrest
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postgres-operator.crunchydata.com/pgbackrest-repo: repo1
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spec:
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resources:
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requests:
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storage: 2Gi
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status:
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accessModes:
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- ReadWriteOnce
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capacity:
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storage: 2Gi
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phase: Bound

‎testing/kuttl/e2e-other/resize-volume/06--check-data.yaml‎

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---
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# Confirm that all the data still exists.
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: check-data
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labels: { postgres-operator-test: kuttl }
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spec:
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backoffLimit: 3
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template:
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metadata:
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labels: { postgres-operator-test: kuttl }
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spec:
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restartPolicy: Never
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containers:
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- name: psql
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image: ${KUTTL_PSQL_IMAGE}
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env:
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- name: PGURI
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valueFrom: { secretKeyRef: { name: resize-volume-up-pguser-resize-volume-up, key: uri } }
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# Do not wait indefinitely.
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- { name: PGCONNECT_TIMEOUT, value: '5' }
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# Confirm that all the data still exists.
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# Note: the `$$$$` is reduced to `$$` by Kubernetes.
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# - https://kubernetes.io/docs/tasks/inject-data-application/
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command:
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- psql
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- $(PGURI)
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- --set=ON_ERROR_STOP=1
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- --command
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- |
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DO $$$$
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DECLARE
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keep_data jsonb;
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BEGIN
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SELECT jsonb_agg(important) INTO keep_data FROM important;
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ASSERT keep_data = '[{"data":"treasure"}]', format('got %L', keep_data);
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END $$$$;

‎testing/kuttl/e2e-other/resize-volume/06-assert.yaml‎

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---
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: check-data
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status:
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succeeded: 1

‎testing/kuttl/e2e-other/resize-volume/11--cluster.yaml‎

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apiVersion: postgres-operator.crunchydata.com/v1beta1
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kind: PostgresCluster
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metadata:
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name: resize-volume-down
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spec:
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postgresVersion: ${KUTTL_PG_VERSION}
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instances:
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- name: instance1
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dataVolumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 2Gi
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backups:
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pgbackrest:
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repos:
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- name: repo1
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volume:
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volumeClaimSpec:
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accessModes:
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- "ReadWriteOnce"
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resources:
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requests:
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storage: 2Gi

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