Kubernetes部署MySQL5.7单机---NFS存储-526互联

实验目的：

将MySQL5.7使用nfs持久化存储部署到Kubernetes集群中

nfs存储地址：

nfs.myit.icu

nfs存储配置：

临时测试---100G
安装nfs
yum install -y nfs-utils rpcbind
创建nfs存储目录
[root@nfs ~]#mkdir /data/nfsData -p
格式化磁盘
[root@nfs ~]#mkfs.ext4 /dev/vdb
挂载磁盘到nfs存储目录
[root@nfs ~]#mount /dev/vdb /data/nfsData/
设置硬盘开机自动挂载
[root@nfs ~]#vim /etc/fstab
/dev/vdb /data/nfsData ext4 defaults  
设置nfs存储目录权限
[root@nfs ~]#chmod -R 777 /data/nfsData/
进入到存储目录
[root@nfs ~]#cd /data/nfsData/
创建数据库存储目录
[root@nfs /data/nfsData]#mkdir Bystart_MySQL_5_7
设置nfs配置---生产最好设置一个B或者C或者单个IP，不要用*
[root@nfs ~]#vim /etc/exports
/data/nfsData *(rw,no_root_squash,no_all_squash,sync)
/data/nfsData/Bystart_MySQL_5_7 *(rw,no_root_squash,no_all_squash,sync)
设置开机自启并启动
[root@nfs ~]#systemctl enable rpcbind --now
[root@nfs ~]#systemctl enable nfs --now

注意：

K8s各节点请安装以下软件，来确保集群支持NFS

yum install -y nfs-utils rpcbind

创建yaml存放目录并进入

mkdir Bystart_MySQL_5_7 && cd Bystart_MySQL_5_7

创建MySQL PV资源清单

vim mysql57_pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: bystart-mysql-5-7-data-pv
spec:
  capacity:
    storage: 15Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  nfs:
    path: /data/nfsData/Bystart_MySQL_5_7      #nfs共享目录
    server: nfs.myit.icu     #nfs服务器地址

创建MySQL PVC资源清单

vim mysql57_pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: bystart-mysql-5-7-data-pvc
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi

创建MySQL Deployment资源清单---我们需要的镜像为：MySQL:5.7，为了部署顺利，可以提前在各节点下载该镜像

vim mysql57_deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: bystart-mysql-5-
spec:
  replicas: 
  template:
    metadata:
      labels:
        name: bystart-mysql
    spec:
      containers:
        - name: mysql
          image: mysql:5.7
          imagePullPolicy: IfNotPresent
          ports:
            - name: db
              containerPort: 
          env:
            - name: MYSQL_ROOT_PASSWORD
              value: "taozi.cn"  #数据库密码
          volumeMounts:
            - mountPath: /var/lib/mysql
              name: bystart-mysql-data
      volumes:
        - name: bystart-mysql-data
          persistentVolumeClaim:
            claimName: bystart-mysql-5-7-data-pvc
  selector:
    matchLabels:
      name: bystart-mysql

创建MySQL SVC资源清单

vim mysql57_svc.yaml

apiVersion: v1
kind: Service
metadata:
  name: bystart-mysql-5-
spec:
  type: NodePort
  ports:
    - port: 
      targetPort: 
      nodePort: 
  selector:
    name: bystart-mysql

开始部署---这个文档没部署到指定命名空间下，如果生产环境，先创建命名空间，将资源部署到指定命名空间下即可！

[root@master1 ~/Bystart_MySQL_5_7]#kubectl create -f mysql57_pv.yaml

persistentvolume/bystart-mysql-5-7-data-pv created

[root@master1 ~/Bystart_MySQL_5_7]#kubectl create -f mysql57_pvc.yaml

persistentvolumeclaim/bystart-mysql-5-7-data-pvc created

[root@master1 ~/Bystart_MySQL_5_7]#kubectl apply -f mysql57_deployment.yaml

deployment.apps/bystart-mysql-5-7 created

[root@master1 ~/Bystart_MySQL_5_7]#kubectl create -f mysql57_svc.yaml

service/bystart-mysql-5-7 created

查看PV信息

root@master1 ~/Bystart_MySQL_5_7]#kubectl get pv

NAME                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE
bystart-mysql-5-7-data-pv   15Gi       RWX            Retain           Available                                   4s

查看PVC信息

[root@master1 ~/Bystart_MySQL_5_7]#kubectl get pvc

NAME                         STATUS   VOLUME                      CAPACITY   ACCESS MODES   STORAGECLASS   AGE
bystart-mysql-5-7-data-pvc   Bound    bystart-mysql-5-7-data-pv   15Gi       RWX                           7s

查看Pod信息

[root@master1 ~/Bystart_MySQL_5_7]#kubectl get pods

NAME                                 READY   STATUS    RESTARTS   AGE
bystart-mysql-5-7-7556448d47-jj7dw   1/1     Running   0          43m
myapp-deploy-64d6d979b7-kpm7v        1/1     Running   0          30d
myapp-deploy-64d6d979b7-pblx8        1/1     Running   0          30d
myapp-deploy-64d6d979b7-tzlgt        1/1     Running   0          30d
nginx-dm-6c75d65c4b-g954p            1/1     Running   0          28d
nginx-dm-6c75d65c4b-m4hrz            1/1     Running   0          28d

查看svc信息

[root@master1 ~/Bystart_MySQL_5_7]#kubectl get svc

NAME                      TYPE           CLUSTER-IP      EXTERNAL-IP    PORT(S)                                     AGE
bystart-mysql-5-7         NodePort       10.105.79.87    <none>         3306:32306/TCP                              43m
kubernetes                ClusterIP      10.96.0.1       <none>         443/TCP                                     79d
myapp                     ClusterIP      10.96.44.160    <none>         80/TCP                                      29d
myapp-externalname        ExternalName   <none>          hub.myit.icu   <none>                                      29d
myapp-headless            ClusterIP      None            <none>         80/TCP                                      29d
myapp-nodeport            NodePort       10.97.28.150    <none>         80:30842/TCP                                29d
nginx-svc                 ClusterIP      10.97.94.6      <none>         80/TCP                                      28d
traefik-ingress-service   NodePort       10.107.183.78   <none>         80:31044/TCP,8080:30316/TCP,443:30362/TCP   79d

结果：

通过Master的IP加上端口，账户密码即可连接到数据库

在nfs存储服务器上查看数据

[root@nfs /data/nfsData/Bystart_MySQL_5_7]#ll

total 188476
-rw-r----- 1 polkitd input       56 Jan  2 16:20 auto.cnf
-rw------- 1 polkitd input     1676 Jan  2 16:20 ca-key.pem
-rw-r--r-- 1 polkitd input     1112 Jan  2 16:20 ca.pem
-rw-r--r-- 1 polkitd input     1112 Jan  2 16:20 client-cert.pem
-rw------- 1 polkitd input     1680 Jan  2 16:20 client-key.pem
-rw-r----- 1 polkitd input     1353 Jan  2 16:21 ib_buffer_pool
-rw-r----- 1 polkitd input 79691776 Jan  2 16:21 ibdata1
-rw-r----- 1 polkitd input 50331648 Jan  2 16:21 ib_logfile0
-rw-r----- 1 polkitd input 50331648 Jan  2 16:20 ib_logfile1
-rw-r----- 1 polkitd input 12582912 Jan  2 16:21 ibtmp1
drwxr-x--- 2 polkitd input     4096 Jan  2 16:20 mysql
drwxr-x--- 2 polkitd input     4096 Jan  2 16:20 performance_schema
-rw------- 1 polkitd input     1680 Jan  2 16:20 private_key.pem
-rw-r--r-- 1 polkitd input      452 Jan  2 16:20 public_key.pem
-rw-r--r-- 1 polkitd input     1112 Jan  2 16:20 server-cert.pem
-rw------- 1 polkitd input     1676 Jan  2 16:20 server-key.pem
drwxr-x--- 2 polkitd input    12288 Jan  2 16:20 sys

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