kubernetes 搭建單節點mysql服務

參考鏈接：https://kubernetes.io/docs/tasks/run-application/run-single-instance-stateful-application/

一、創建service

apiVersion: v1
kind: Service
metadata:
  name: mysql
  labels:
    app: mysql
  namespace: admin-d2069c
spec:
  ports:
  - name: mysql
    port: 3306
  clusterIP: None
  selector:
    app: mysql

二、創建StatefulSet

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: mysql
  namespace: admin-d2069c
spec:
  serviceName: mysql
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
      namespace: admin-d2069c
    spec:
      containers:
      - name: mysql
        image: mysql:5.7
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "123"
        ports:
        - name: mysql
          containerPort: 3306
        volumeMounts:
        - name: lihaile
          mountPath: /var/lib/mysql
          subPath: mysql
        - name: conf
          mountPath: /etc/mysql/conf.d
        resources:
          requests:
            cpu: 300m
            memory: 200M
        livenessProbe:
          exec:
            command: ["mysqladmin", "-h", "127.0.0.1", "-uroot", "-p123", "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", "-uroot", "-p123", "-e", "SELECT 1"]
          initialDelaySeconds: 5
          periodSeconds: 2
          timeoutSeconds: 1
      volumes:
      - name: conf
        emptyDir: {}
      - name: config-map
        configMap:
          name: mysql
  volumeClaimTemplates:
  - metadata:
      name: lihaile
      annotations:
        volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
      namespace: admin-d2069c
    spec:
      accessModes: ["ReadWriteOnce"]
      resources:
        requests:
          storage: 2Gi

三、創建訪問Service

apiVersion: v1
kind: Service
metadata:
  name: mysql-access
  labels:
    app: mysql
    namespace: admin-d2069c
spec:
  ports:
  - name: mysql
    port: 3306
  selector:
    app: mysql

查看Mysql

root@node4:~# kubectl -n admin-d2069c get pvc,pv,statefulset,pod,service |grep mysql
pvc/storage-mysql-0                    Bound     pvc-a6c63604-c2ee-11e8-b599-0050568eef9f   512M       RWX            managed-nfs-storage   18s

pv/pvc-a6c63604-c2ee-11e8-b599-0050568eef9f   512M       RWX            Delete           Bound     admin-d2069c/storage-mysql-0                   managed-nfs-storage             18s

statefulsets/mysql                      1         1         18s

po/mysql-0                                   1/1       Running   0          18s

svc/mysql                       ClusterIP   None            <none>        3306/TCP                          18s
svc/mysql-access                ClusterIP   10.68.31.80     <none>        3306/TCP                          18s


ing/mysql-access                jekens.com               80        18s

五、測試

1、查看集羣詳情和狀態

root@node4:~# mysql -h 10.68.31.80 -p123
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 124
Server version: 5.7.23 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

mysql>