k8s-部署mysql集群

临时操作后续细化补充

1.创建存储目录：

mkdir -p /server/yaml/app/mysql;cd /server/yaml/app/mysql

2.创建pv

cat mysql.pv.yaml 
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-nfs-mysql01                     #创建的pv名称可创建多个.
  namespace: mt-math                    #属于的命名空间
spec:
  capacity:
    storage: 5Gi                        #创建的pv容量为1G
  accessModes:
  - ReadWriteOnce                       #pv的访问模式:可读可写可挂在多个节点
  persistentVolumeReclaimPolicy: Retain #回收策略
  #storageClassName: pv-nfs-mysql
  nfs:                                  #创建的pv数据来源
    path: /NFS/mysql/pv01                     #数据源目录
    server: 192.168.0.14                #数据源ip
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-nfs-mysql02                     #创建的pv名称可创建多个.
  namespace: mt-math                    #属于的命名空间
spec:
  capacity:
    storage: 5Gi                        #创建的pv容量为1G
  accessModes:
  - ReadWriteOnce                       #pv的访问模式:可读可写可挂在多个节点
  persistentVolumeReclaimPolicy: Retain #回收策略
  #storageClassName: pv-nfs-mysql
  nfs:                                  #创建的pv数据来源
    path: /NFS/mysql/pv02                     #数据源目录
    server: 192.168.0.14                #数据源ip
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-nfs-mysql03                     #创建的pv名称可创建多个.
  namespace: mt-math                    #属于的命名空间
spec:
  capacity:
    storage: 5Gi                        #创建的pv容量为1G
  accessModes:
  - ReadWriteOnce                       #pv的访问模式:可读可写可挂在多个节点
  persistentVolumeReclaimPolicy: Retain #回收策略
  #storageClassName: pv-nfs-mysql
  nfs:                                  #创建的pv数据来源
    path: /NFS/mysql/pv03                    #数据源目录
    server: 192.168.0.14                #数据源ip

2.创建master server 与 slave server

 cat mysql_configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql
  namespace: mt-math
  labels:
    app: mysql
data:
  master.cnf: |
    # Apply this config only on the master.
    [mysqld]
    log-bin
    log_bin_trust_function_creators=1
    #关闭MySQL对创建存储函数实施的限制
    lower_case_table_names=1
    #设置大小写不敏感
  slave.cnf: |
    # Apply this config only on slaves.
    [mysqld]
    super-read-only
    #只读模式
    log_bin_trust_function_creators=1

创建mysql无头服务 这里创建两个实例

cat mysql.statefulset.yaml 
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: mysql
  namespace: mt-math
spec:
  selector:
    matchLabels:
      app: mysql
  serviceName: mysql
  replicas: 2
  template:
    metadata:
      namespace: mt-math
      labels:
        app: mysql
    spec:
      initContainers:
      - name: init-mysql
        image: mysql:5.7
        command:
        - bash
        - "-c"
        - |
          set -ex
          # Generate mysql server-id from pod ordinal index.
          [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
          ordinal=${BASH_REMATCH[1]}
          echo [mysqld] > /mnt/conf.d/server-id.cnf
          # Add an offset to avoid reserved server-id=0 value.
          echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
          # Copy appropriate conf.d files from config-map to emptyDir.
          if [[ $ordinal -eq 0 ]]; then
            cp /mnt/config-map/master.cnf /mnt/conf.d/
          else
            cp /mnt/config-map/slave.cnf /mnt/conf.d/
          fi
        volumeMounts:
        - name: conf
          mountPath: /mnt/conf.d
        - name: config-map
          mountPath: /mnt/config-map
      - name: clone-mysql
        image: twoeo/gcr.io-google-samples-xtrabackup
        command:
        - bash
        - "-c"
        - |
          set -ex
          # Skip the clone if data already exists.
          [[ -d /var/lib/mysql/mysql ]] && exit 0
          # Skip the clone on master (ordinal index 0).
          [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
          ordinal=${BASH_REMATCH[1]}
          [[ $ordinal -eq 0 ]] && exit 0
          # Clone data from previous peer.
          ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
          # Prepare the backup.
          xtrabackup --prepare --target-dir=/var/lib/mysql
        volumeMounts:
        - name: data
          mountPath: /var/lib/mysql
          subPath: mysql
        - name: conf
          mountPath: /etc/mysql/conf.d
      containers:
      - name: mysql
        image: mysql:5.7
        env:
        - name: MYSQL_ALLOW_EMPTY_PASSWORD
          value: "1"
        ports:
        - name: mysql
          containerPort: 3306
        volumeMounts:
        - name: data
          mountPath: /var/lib/mysql
          subPath: mysql
        - name: conf
          mountPath: /etc/mysql/conf.d
        resources:
          requests:
            cpu: 500m
            memory: 1Gi
        livenessProbe:
          exec:
            command: ["mysqladmin", "ping"]
          initialDelaySeconds: 30
          periodSeconds: 10
          timeoutSeconds: 5
        readinessProbe:
          exec:
            # Check we can execute queries over TCP (skip-networking is off).
            command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"]
          initialDelaySeconds: 5
          periodSeconds: 2
          timeoutSeconds: 1
      - name: xtrabackup
        image: twoeo/gcr.io-google-samples-xtrabackup
        ports:
        - name: xtrabackup
          containerPort: 3307
        command:
        - bash
        - "-c"
        - |
          set -ex
          cd /var/lib/mysql

          # Determine binlog position of cloned data, if any.
          if [[ -f xtrabackup_slave_info ]]; then
            # XtraBackup already generated a partial "CHANGE MASTER TO" query
            # because we're cloning from an existing slave.
            mv xtrabackup_slave_info change_master_to.sql.in
            # Ignore xtrabackup_binlog_info in this case (it's useless).
            rm -f xtrabackup_binlog_info
          elif [[ -f xtrabackup_binlog_info ]]; then
            # We're cloning directly from master. Parse binlog position.
            [[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
            rm xtrabackup_binlog_info
            echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}',\
                  MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in
          fi

          # Check if we need to complete a clone by starting replication.
          if [[ -f change_master_to.sql.in ]]; then
            echo "Waiting for mysqld to be ready (accepting connections)"
            until mysql -h 127.0.0.1 -e "SELECT 1"; do sleep 1; done

            echo "Initializing replication from clone position"
            # In case of container restart, attempt this at-most-once.
            mv change_master_to.sql.in change_master_to.sql.orig
            mysql -h 127.0.0.1 < 
   
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