kubernetes cronjob备份mysql

apiVersion: batch/v1
kind: CronJob
metadata:
  annotations: {}
  labels:
    app/name: mysql-backup-arm
  name: mysql-backup-arm
  namespace: sre
spec:
  concurrencyPolicy: Forbid
  failedJobsHistoryLimit: 1
  jobTemplate:
    metadata:
      creationTimestamp: null
      labels:
        app/name: mysql-backup-arm
    spec:
      template:
        metadata:
          creationTimestamp: null
        spec:
          containers:
            - command:
                - /bin/sh
                - '-c'
                - >
                  set -ex   

                  mysqldump --host=$MYSQL_HOST  --user=$MYSQL_BACKUP_USER
                  --password=$MYSQL_BACKUP_USER_PASSWORD  --routines
                  --databases  $MYSQL_DB --single-transaction  >
                  /mysql-backup/mysql-$MYSQL_DB-`date +"%Y%m%d%H%M%S"`.sql &&
                  tar zcvf /mysql-backup/mysql-$MYSQL_DB-`date
                  +"%Y%m%d%H%M%S"`.tgz /mysql-backup/*.sql && rm -rf
                  /mysql-backup/*$MYSQL_DB*.sql
              env:
                - name: MYSQL_BACKUP_USER
                  value: root
                - name: MYSQL_BACKUP_USER_PASSWORD
                  value: 123456
                - name: MYSQL_HOST
                  value: mysql
                - name: MYSQL_DB
                  value: ginBase
              image: 'biarms/mysql:5.7.30-linux-arm64v8'
              imagePullPolicy: IfNotPresent
              name: mysql-backup-arm
              resources: {}
              terminationMessagePath: /dev/termination-log
              terminationMessagePolicy: File
              volumeMounts:
                - mountPath: /mysql-backup
                  name: mysql-backup
          dnsPolicy: ClusterFirst
          restartPolicy: Never
          schedulerName: default-scheduler
          securityContext: {}
          terminationGracePeriodSeconds: 30
          volumes:
            - hostPath:
                path: /backup/mysql-arm
                type: Directory
              name: mysql-backup
      ttlSecondsAfterFinished: 86400
  schedule: 0 2 * * *
  successfulJobsHistoryLimit: 3
  suspend: false