Initial commit

shared/mariadb.yml

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+# MariaDB 10.5 is supported until 2025
+# Note that MariaDB 10.6 breaks with Nextcloud
+# https://help.nextcloud.com/t/update-to-next-cloud-21-0-2-has-get-an-error/117028/7
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mariadb
+  annotations:
+    keel.sh/policy: patch
+    keel.sh/trigger: poll
+    keel.sh/pollSchedule: "@midnight"
+spec:
+  revisionHistoryLimit: 0
+  serviceName: mariadb
+  selector:
+    matchLabels:
+      app: mariadb
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: mariadb
+      annotations:
+        prometheus.io/port: '9104'
+        prometheus.io/scrape: 'true'
+    spec:
+      containers:
+      - name: exporter
+        image: prom/mysqld-exporter:latest
+        env:
+        - name: DATA_SOURCE_NAME
+          value: exporter@tcp(127.0.0.1)/
+      - name: mariadb
+        image: mariadb:10.5
+        imagePullPolicy: Always
+        env:
+        - name: MYSQL_ROOT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mariadb-secrets
+              key: MYSQL_ROOT_PASSWORD
+        - name: MYSQL_USER
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: MYSQL_DATABASE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: MYSQL_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mariadb-secrets
+              key: MYSQL_PASSWORD
+        volumeMounts:
+        - name: mariadb-data
+          mountPath: /var/lib/mysql
+        - name: mariadb-init
+          mountPath: /docker-entrypoint-initdb.d
+      volumes:
+        - name: mariadb-init
+          configMap:
+            name: mariadb-init-config
+
+      # Make sure MariaDB instances run on storage{1..3} nodes, as close
+      # as possible to Longhorn instances
+      tolerations:
+      - key: dedicated
+        operator: Equal
+        value: storage
+        effect: NoSchedule
+      nodeSelector:
+        dedicated: storage
+  volumeClaimTemplates:
+  - metadata:
+      name: mariadb-data
+    spec:
+      storageClassName: longhorn
+      accessModes:
+        - ReadWriteOnce
+      resources:
+        requests:
+          storage: 2Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: mariadb
+spec:
+  ports:
+    - protocol: TCP
+      port: 3306
+  selector:
+    app: mariadb
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: mariadb-init-config
+data:
+  initdb.sql: |
+    CREATE USER 'exporter'@'127.0.0.1' WITH MAX_USER_CONNECTIONS 3;
+    GRANT PROCESS, REPLICATION CLIENT, SLAVE MONITOR, SELECT ON *.* TO 'exporter'@'127.0.0.1';