Can't increase PVC size for postgresql

[h00jraq]

Official Helm Chart version

1.9.0 (latest released)

Apache Airflow version

2.5.0

Kubernetes Version

1.26

Helm Chart configuration

Here is the part of postgresql in my values.yaml file:

airflow:
....
postgresql:
primary:
persistence:
enabled: true
size: 50Gi
existingClaim: airflow-postgresql-db
resources:
limits:
cpu: 1000m
memory: 2048Mi
requests:
cpu: 200m
memory: 256Mi
....

I've also tried with below but it has not changed anything.

airflow:
....
postgresql:
  persistence:
    enabled: true
    size: 50Gi
    existingClaim: airflow-postgresql-db
  resources:
    limits:
      cpu: 1000m
      memory: 2048Mi
    requests:
      cpu: 200m
      memory: 256Mi
....

tried also with different indentation:

airflow:
....
  postgresql:
    persistence:
      enabled: true
      size: 50Gi
      existingClaim: airflow-postgresql-db
    resources:
      limits:
        cpu: 1000m
        memory: 2048Mi
      requests:
        cpu: 200m
        memory: 256Mi
....

PVC and PV are created and in bound state:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    volume.beta.kubernetes.io/storage-provisioner: disk.csi.azure.com
    volume.kubernetes.io/storage-provisioner: disk.csi.azure.com
  finalizers:
  - kubernetes.io/pvc-protection
  labels:
    app.kubernetes.io/component: primary
    app.kubernetes.io/instance: airflow
    app.kubernetes.io/name: postgresql
  name: airflow-postgresql-db
  namespace: airflow-sandbox
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
  storageClassName: default
  volumeMode: Filesystem
  volumeName: postgres-db-pv

PV:

apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: disk.csi.azure.com
  finalizers:
  - kubernetes.io/pv-protection
  - external-attacher/disk-csi-azure-com
  name: postgres-db-pv
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 50Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: airflow-postgresql-db
    namespace: airflow-sandbox
  csi:
    driver: disk.csi.azure.com
    volumeAttributes:
      csi.storage.k8s.io/pvc/namespace: airflow-sandbox
      requestedsizegib: "50"
      skuname: StandardSSD_LRS
    volumeHandle: /mysub/myrg/providers/Microsoft.Compute/disks/postgres-db-pv
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: topology.disk.csi.azure.com/zone
          operator: In
          values:
          - uksouth-3
  persistentVolumeReclaimPolicy: Delete
  storageClassName: default
  volumeMode: Filesystem

Docker Image customizations

I use standard docker image from Airflow

What happened

For some reason, postgres is always creating pvc named data-airflow-postgresql-0. Is it possible that this comes from volumeClaimTemplates or something? This is what I see when running kubectl get statefulsets.apps -n airflow-sandbox airflow-postgresql -o yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  annotations:
    [meta.helm.sh/release-name](http://meta.helm.sh/release-name): airflow
    [meta.helm.sh/release-namespace](http://meta.helm.sh/release-namespace): airflow-sandbox
  creationTimestamp: "2023-05-22T07:08:01Z"
  generation: 1
  labels:
    [app.kubernetes.io/component](http://app.kubernetes.io/component): primary
    [app.kubernetes.io/instance](http://app.kubernetes.io/instance): airflow
    [app.kubernetes.io/managed-by](http://app.kubernetes.io/managed-by): Helm
    [app.kubernetes.io/name](http://app.kubernetes.io/name): postgresql
    [helm.sh/chart](http://helm.sh/chart): postgresql-12.1.9
  name: airflow-postgresql
  namespace: airflow-sandbox
  resourceVersion: "88975048"
  uid: 58c0d7d5-5dd3-428a-bba0-fd3a300b4a6f
spec:
  podManagementPolicy: OrderedReady
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      [app.kubernetes.io/component](http://app.kubernetes.io/component): primary
      [app.kubernetes.io/instance](http://app.kubernetes.io/instance): airflow
      [app.kubernetes.io/name](http://app.kubernetes.io/name): postgresql
  serviceName: airflow-postgresql-hl
  template:
    metadata:
      creationTimestamp: null
      labels:
        [app.kubernetes.io/component](http://app.kubernetes.io/component): primary
        [app.kubernetes.io/instance](http://app.kubernetes.io/instance): airflow
        [app.kubernetes.io/managed-by](http://app.kubernetes.io/managed-by): Helm
        [app.kubernetes.io/name](http://app.kubernetes.io/name): postgresql
        [helm.sh/chart](http://helm.sh/chart): postgresql-12.1.9
      name: airflow-postgresql
    spec:
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
              labelSelector:
                matchLabels:
                  [app.kubernetes.io/component](http://app.kubernetes.io/component): primary
                  [app.kubernetes.io/instance](http://app.kubernetes.io/instance): airflow
                  [app.kubernetes.io/name](http://app.kubernetes.io/name): postgresql
              topologyKey: [kubernetes.io/hostname](http://kubernetes.io/hostname)
            weight: 1
      containers:
      - env:
        - name: BITNAMI_DEBUG
          value: "false"
        - name: POSTGRESQL_PORT_NUMBER
          value: "5432"
        - name: POSTGRESQL_VOLUME_DIR
          value: /bitnami/postgresql
        - name: PGDATA
          value: /bitnami/postgresql/data
        - name: POSTGRES_PASSWORD
          valueFrom:
            secretKeyRef:
              key: postgres-password
              name: airflow-postgresql
        - name: POSTGRESQL_ENABLE_LDAP
          value: "no"
        - name: POSTGRESQL_ENABLE_TLS
          value: "no"
        - name: POSTGRESQL_LOG_HOSTNAME
          value: "false"
        - name: POSTGRESQL_LOG_CONNECTIONS
          value: "false"
        - name: POSTGRESQL_LOG_DISCONNECTIONS
          value: "false"
        - name: POSTGRESQL_PGAUDIT_LOG_CATALOG
          value: "off"
        - name: POSTGRESQL_CLIENT_MIN_MESSAGES
          value: error
        - name: POSTGRESQL_SHARED_PRELOAD_LIBRARIES
          value: pgaudit
        image: [docker.io/bitnami/postgresql:11](http://docker.io/bitnami/postgresql:11)
        imagePullPolicy: IfNotPresent
        livenessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - exec pg_isready -U "postgres" -h 127.0.0.1 -p 5432
          failureThreshold: 6
          initialDelaySeconds: 30
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 5
        name: postgresql
        ports:
        - containerPort: 5432
          name: tcp-postgresql
          protocol: TCP
        readinessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - -e
            - |
              exec pg_isready -U "postgres" -h 127.0.0.1 -p 5432
              [ -f /opt/bitnami/postgresql/tmp/.initialized ] || [ -f /bitnami/postgresql/.initialized ]
          failureThreshold: 6
          initialDelaySeconds: 5
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 5
        resources:
          requests:
            cpu: 250m
            memory: 256Mi
        securityContext:
          runAsUser: 1001
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /dev/shm
          name: dshm
        - mountPath: /bitnami/postgresql
          name: data
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext:
        fsGroup: 1001
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 30
      volumes:
      - emptyDir:
          medium: Memory
        name: dshm
  updateStrategy:
    rollingUpdate:
      partition: 0
    type: RollingUpdate
  volumeClaimTemplates:
  - apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      creationTimestamp: null
      name: data
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 8Gi
      volumeMode: Filesystem
    status:
      phase: Pending
status:
  availableReplicas: 1
  collisionCount: 0
  currentReplicas: 1
  currentRevision: airflow-postgresql-78588bb7f9
  observedGeneration: 1
  readyReplicas: 1
  replicas: 1
  updateRevision: airflow-postgresql-78588bb7f9
  updatedReplicas: 1

What you think should happen instead

I would like postgresql to use the PVC which I have declared in existingClaim in my values.yaml

How to reproduce

1. Create PVC based on the one I have provided
2. Add your PVC name to existingClaim: in postgresql part of values.yaml
3. Uninstall your Airflow release and delete pvc previously used by postgresql pod (you will loose your data!!)
4. Install new Airflow release - Airflow will ignore the PVC which you had used in existingClaim: and will create and use data-airflow-postgresql-0

Anything else

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[boring-cyborg]

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