$ helm repo add mariadb-operator https://helm.mariadb.com/mariadb-operator
$ helm install mariadb-operator-crds mariadb-operator/mariadb-operator-crds 
$ helm install mariadb-operator mariadb-operator/mariadb-operator

---
apiVersion: v1
kind: Secret
metadata:
  name: {{.Release.Name}}-mariadb-secrets
type: Opaque
data:
  rootPassword: {{ .Values.app.db.rootPassword | b64enc }}
  password: {{ .Values.app.db.password | b64enc}}
---
apiVersion: k8s.mariadb.com/v1alpha1
kind: MariaDB
metadata:
  name: {{ .Release.Name }}-mariadb
spec:
  rootPasswordSecretKeyRef:
    name: {{.Release.Name}}-mariadb-secrets
    key: rootPassword

  port: 3306

  storage:
    size: 1Gi
    # storageClassName: csi-hostpath-sc

  myCnf: |
    [mariadb]
    bind-address=*
    default_storage_engine=InnoDB
    binlog_format=row
    innodb_autoinc_lock_mode=2
    innodb_buffer_pool_size=1024M
    max_allowed_packet=256M

  resources:
    requests:
      cpu: 100m
      memory: 128Mi
    limits:
      memory: 1Gi
---
apiVersion: k8s.mariadb.com/v1alpha1
kind: Database
metadata:
  name: {{ .Values.app.db.database }}
spec:
  mariaDbRef:
    name: {{ .Release.Name }}-mariadb
---
apiVersion: k8s.mariadb.com/v1alpha1
kind: User
metadata:
  name: {{ .Values.app.db.username }}
spec:
  mariaDbRef:
    name: {{ .Release.Name }}-mariadb
  passwordSecretKeyRef:
    name: {{.Release.Name}}-mariadb-secrets
    key:  password
  maxUserConnections: 0
---
apiVersion: k8s.mariadb.com/v1alpha1
kind: Grant
metadata:
  name: catalyst-api
spec:
  mariaDbRef:
    name: {{ .Release.Name }}-mariadb
  privileges:
    - ALL PRIVILEGES
  database: {{ .Values.app.db.database }}
  username: {{ .Values.app.db.username }}

mysql@patchdemo-mariadb-0:/docker-entrypoint-initdb.d$ mariadb -uroot -predacted < 01-init.sql 
Table	Op	Msg_type	Msg_text
patchdemo.tasks	optimize	note	Table does not support optimize, doing recreate + analyze instead
patchdemo.tasks	optimize	status	OK
Table	Op	Msg_type	Msg_text
patchdemo.wikis	optimize	note	Table does not support optimize, doing recreate + analyze instead
patchdemo.wikis	optimize	status	OK
Table	Op	Msg_type	Msg_text
patchdemo.patches	optimize	note	Table does not support optimize, doing recreate + analyze instead
patchdemo.patches	optimize	status	OK
mysql@patchdemo-mariadb-0:/docker-entrypoint-initdb.d$ mariadb -u patchdemo -predacted
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 205
Server version: 12.0.2-MariaDB-ubu2404 mariadb.org binary distribution

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> use patchdemo;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
MariaDB [patchdemo]> show tables;
+---------------------+
| Tables_in_patchdemo |
+---------------------+
| patches             |
| tasks               |
| wikis               |
+---------------------+
3 rows in set (0.001 sec)

MariaDB [patchdemo]> ^DBye