Add mysqlbackup

mysqlbackup/backup-script.sh

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+#!/bin/bash
+
+# Set backup directory and file name format
+BACKUP_DIR=/backup
+DATE=$(date +"%Y-%m-%d-%H-%M-%S")
+BACKUP_RETENTION_DAYS=7
+
+# Get list of databases
+DATABASES=$(mysql -u $MYSQL_USER -p$MYSQL_PASSWORD -h $MYSQL_HOST -e "SHOW DATABASES;" | grep -Ev "(Database|information_schema|performance_schema|mysql)")
+
+# Loop through databases and dump them to separate files
+for DB in $DATABASES; do
+	mysqldump --single-transaction --quick -u $MYSQL_USER -p$MYSQL_PASSWORD -h $MYSQL_HOST $DB | gzip >$BACKUP_DIR/$DB-$DATE.sql.gz
+done
+# Remove backups older than 7 days
+find $BACKUP_DIR -name "*.gz" -type f -mtime +$BACKUP_RETENTION_DAYS -delete

mysqlbackup/cronjob.yml

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+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: mysql-backup
+spec:
+  schedule: "0 0 * * *"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: mysql-backup
+            image: mariadb:latest
+            command: ["sh", "/backup-script.sh"]
+            env:
+            - name: MYSQL_HOST
+              value: galera-mariadb-galera
+            - name: MYSQL_USER
+              value: backupuser
+            - name: MYSQL_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: backupscrets
+                  key: backupsecret
+            volumeMounts:
+            - name: backup-volume
+              mountPath: /backup
+            - name: backup-script
+              mountPath: /backup-script.sh
+              subPath: backup-script.sh
+              readOnly: true
+          restartPolicy: OnFailure
+          volumes:
+          - name: backup-volume
+            persistentVolumeClaim:
+              claimName: backup-pvc
+          - name: backup-script
+            configMap:
+              name: backup-script

mysqlbackup/job.yml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: mysql-backup
+spec:
+  template:
+    spec:
+      containers:
+      - name: mysql-backup
+        image: mariadb:latest
+        command: [ "/bin/sh" ]
+        args: [ "-c", "sleep 3600" ]
+        env:
+        - name: MYSQL_HOST
+          value: galera-mariadb-galera
+        - name: MYSQL_USER
+          value: backupuser
+        - name: MYSQL_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: backupscrets
+              key: backupsecret
+        volumeMounts:
+        - name: backup-volume
+          mountPath: /backup
+        - name: backup-script
+          mountPath: /backup-script.sh
+          subPath: backup-script.sh
+          readOnly: true
+      restartPolicy: OnFailure
+      volumes:
+      - name: backup-volume
+        persistentVolumeClaim:
+          claimName: backup-pvc
+      - name: backup-script
+        configMap:
+          name: backup-script
+  backoffLimit: 1
+

mysqlbackup/pvc.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: backup-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: "longhorn"
+  resources:
+    requests:
+      storage: 5Gi