练习 Minikube

Define credentials -> mysql-secret.yml

use echo -n 'your_password' | base64 to generate a opaque password.

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apiVersion: v1
kind: Secret
metadata:
  namespace: iris
  name: iris-mysql-password
type: Opaque
data:
  password: Y2hpbm8xMjA0

mysql-configmap.yml

a copy of config file.

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apiVersion: v1
kind: ConfigMap
metadata:
  namespace: iris
  name: iris-mysql-config
data:
  mysqld.cnf: |-
    [client]
    default-character-set=utf8
    [mysqld]
    pid-file        = /var/run/mysqld/mysqld.pid
    socket          = /var/run/mysqld/mysqld.sock
    datadir         = /var/lib/mysql
    skip_external_locking
    skip-symbolic-links
    memlock=true
    max_connect_errors = 20000
    max_connections = 3000
    skip-name-resolve
    default-time-zone = system
    default-storage-engine = InnoDB
    explicit_defaults_for_timestamp = 1
    lower_case_table_names = 1
    key_buffer_size = 4096M
    table_open_cache = 1024
    sort_buffer_size = 4M
    read_buffer_size = 4M
    thread_cache_size = 128
    query_cache_size = 512M
    character-set-server = utf8
    collation-server = utf8_general_ci
    sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
    # innoDB
    innodb_page_size = 16K
    innodb_read_io_threads  = 4
    innodb_write_io_threads = 4
    innodb_io_capacity = 200
    innodb_io_capacity_max = 2000    

mysql-pvc.yml

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apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  namespace: iris
  name: iris-mysql-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

mysql-deployment.yml

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apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: iris
  name: iris-mysql-deployment
  labels:
    name: iris-mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      name: iris-mysql
  template:
    metadata:
      labels:
        name: iris-mysql
    spec:
      containers:
        - name: mysql
          image: mysql:5.7
          imagePullPolicy: IfNotPresent
          args:
            - --default_authentication_plugin=mysql_native_password
          ports:
            - containerPort: 3306
              name: mysql-port
          volumeMounts:
            - mountPath: /var/lib/mysql
              name: mysql-data
              subPath: mysql
            - mountPath: /etc/mysql/mysql.conf.d/
              name: mysql-conf
          env:
            - name: MYSQL_ROOT_PASSWORD # env used in docker image
              valueFrom:
                secretKeyRef:
                  key: password
                  name: iris-mysql-password
      volumes:
        - name: mysql-data
          persistentVolumeClaim:
            claimName: iris-mysql-pvc
        - name: mysql-conf
          configMap:
            name: iris-mysql-config

mysql-service.yml

Recommend to use ClusterIP rather than NodePort, here is just for dev practice.

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apiVersion: v1
kind: Service
metadata:
  namespace: iris
  name: iris-mysql-service
  labels:
    name: iris-mysql-service
spec:
  type: NodePort
  selector:
    name: iris-mysql
  ports:
    - protocol: TCP
      port: 3306
      targetPort: 3306
      nodePort: 30036

Last Step

After you have applied all files above, you can access mysql in minikube or inside the docker container of minikube. If you want to access mysql at localhost, there are two ways:

use minikube service => minikube service iris-mysql-service -n iris
use kubectl port-forward => kubectl -n iris port-forward service/iris-mysql-service 33306:3306