Deploying bitnami/mysql helm chart with an existing Persistence Volume Claim

Question

I'm trying to deploy bitnami/mysql chart inside my minikube. I'm using Kubernetes v1.19, Minikube v1.17.1 and Helm 3

I've created a PVC and PV as follow:

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mysql-pvc
spec:
  storageClassName: standard
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi
  selector:
    matchLabels:
      id: mysql-pv
----
kind: PersistentVolume
apiVersion: v1
metadata:
  name: mysql-pv
  labels:
    type: local
    id: mysql-pv
spec:
  storageClassName: standard
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: /var/lib/mysql

I've created the directory /var/lib/mysql by doing sudo mkdir -p /var/lib/mysql And this is how I create my PVC and PC:

kubectl apply -f mysql-pv-dev.yaml
kubectl apply -f mysql-pvc-dev.yaml

Which seems to work:

NAME       STATUS   VOLUME     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
mysql-pvc  Bound    mysql-pv   8Gi        RWO            standard          59s

I am deploying my mysql with: helm upgrade --install dev-mysql -f mysql-dev.yaml bitnami/mysql

Custom value file - mysql-dev.yaml:

auth:
  database: dev_db
  username: dev_user
  password: passworddev
  rootPassword: rootpass
image:
  debug: true
primary:
  persistence:
    existingClaim: mysql-pvc
  extraVolumeMounts: |
      - name: init
        mountPath: /docker-entrypoint-initdb.d
  extraVolumes: |
      - name: init
        hostPath:
          path: /home/dev/init_db_scripts/
          type: Directory
volumePermissions:
  enabled: true

The deployement works:

NAME         READY   STATUS    RESTARTS   AGE
dev-mysql-0  0/1     Running   0          8s 

the problem is that the pod never gets ready because:

  Warning  Unhealthy  0s (x2 over 10s)  kubelet            Readiness probe failed: mysqladmin: [Warning] Using a password on the command line interface can be insecure.
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: YES)'

mysqld is running inside the pod but for some reasons the root password isn't properly set because when I exec to the pod and try to connect to mysql I get:

$ kubectl exec -ti dev-mysql bash
I have no name!@dev-mysql-0:/$ mysql -u root -prootpass
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
I have no name!@dev-mysql-0:/$

Instead it's using the default values so if I try: mysql -u root -p without password it works great.

Thanks

Answer 1

A bitnami engineer here, I was able to reproduce the issue, I'm going to create an internal task to resolve this. We will update this thread when we have more information.