chown：更改'的所有权/var/lib/mysql/'；：在kubernetes的启动吊舱中不允许操作

当我在kubernetes v1.15.2中启动mysql 5.7播客时，日志如下所示：

2020-05-30 13:08:04+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.30-1debian10 started.
chown: changing ownership of '/var/lib/mysql/': Operation not permitted

chmod 777 /mnt/data/apollodb/apollopv

这是我的mysql yaml定义：

apiVersion: v1
kind: Service
metadata:
  name: apollo-mysql
  namespace: sre
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: apollo-mysql
  namespace: sre
spec:
  selector:
    matchLabels:
      app: apollo-mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: apollo-mysql
    spec:
      containers:
      - image: mysql:5.7
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: gfwge4LucnXwfefewegLwAd29QqJn4
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: apollo-mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: apollo-mysql-persistent-storage
        persistentVolumeClaim:
          claimName: apollo-mysql-pv-claim

这是我的pv定义：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-apollo-mysql-pv1
  namespace: sre
  labels:
    alicloud-pvname: apollo-mysql-data-db
spec:
  capacity:
    storage: 5Gi
  storageClassName: apollo-mysql-data-db
  mountOptions:
    - vers=4.0
    - noresvport
  accessModes:
    - ReadWriteOnce
  nfs:
    server: "192.168.64.237"
    path: "/mnt/data/apollodb/apollopv"
  persistentVolumeReclaimPolicy: Retain

我已经将mod更改为777，如下所示：

2020-05-30 13:08:04+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 5.7.30-1debian10 started.
chown: changing ownership of '/var/lib/mysql/': Operation not permitted

chmod 777 /mnt/data/apollodb/apollopv

那么问题出在哪里？我应该怎么做才能解决这个问题？我检查selinux状态，它被禁用

[miao@meowk8sslave3 apollodb]$ /usr/sbin/sestatus -v
SELinux status:                 disabled

这是我的nfs导出定义：

/mnt/data/apollodb/apollopv *(rw,sync,no_subtree_check,no_root_squash)

---

您提供的yaml缺少PVC，它指定要安装的

storageClass

看起来您正在尝试挂载外部NFS（可能使用某些云提供商），在这种情况下，您需要安装

NFS UTIL

，并执行

mount-t NFS 192.168.64.237:/entrypoint/mnt/…

PV上显示的是

/mnt/data/apollodb/apollopv

，它应该是nfs服务器的入口点，而不是文件系统中安装它的位置

要实现这一点，请为自己准备一台nfs服务器（获取IP地址和入口点；比如192.168.64.237:/nfs），然后按如下方式将其安装到pod中：

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: apollo-mysql
  namespace: sre
spec:
  selector:
    matchLabels:
      app: apollo-mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: apollo-mysql
    spec:
      containers:
      - image: mysql:5.7
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: gfwge4LucnXwfefewegLwAd29QqJn4
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: apollo-mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: apollo-mysql-persistent-storage
        nfs:
          server: 192.168.64.237
          path: "/nfs"

---

您不需要存储类、PVC和PV。您需要的一切都在pod中，外部有nfs服务器。

我能够以

emptyDir:{}

的形式运行MySQL部署卷。因此，图像本身看起来很好。能否检查NFS主机上是否启用了SELinux？