本篇内容介绍了“k8s启动mysql主从的过程”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
启动两个docker ,服务为mysql主从模式;
首先需要构建两个docker,使用mysql5.7的镜像作为基础镜像
1. mysql-master Dockerfile
FROM mysql:latest
RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/shanghai" >> /etc/timezone
COPY mysqld.cnf /etc/mysql/mysql.conf.d/mysqld.cnf
COPY entrypoint.sh /
COPY init-master.sh /docker-entrypoint-initdb.d/
在当前目录下执行如下命令:
docker built -t mysql-master:v1.0 .
其他文件请参照文章末尾的GitHub链接地址
2. mysql-slave Dockerfile
FROM mysql:latest
RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo "Asia/shanghai" >> /etc/timezone
COPY mysqld.cnf /etc/mysql/mysql.conf.d/
COPY entrypoint.sh /
COPY slave-init.sh /docker-entrypoint-initdb.d/
在当前目录下执行如下命令:
docker built -t mysql-slave:v1.0 .
其他文件请参照文章末尾的GitHub链接地址
3. 执行k8s 的yaml文件 master, 文件名:mysql-master.yaml
确保本地有 /data/mysql_data目录
apiVersion: v1
kind: Pod
metadata:
name: master-tdbwv
labels:
name: master-tdbwv
spec:
volumes:
- name: data
hostPath:
path: /data/mysql_data
containers:
- name: master-tdbwv
image: mysql-master:v1.0
env:
- name: MYSQL_ROOT_PASSWORD
value: uggTKd3xsIMM
- name: MYSQL_REPLICATION_USER
value: repl
- name: MYSQL_REPLICATION_PASSWORD
value: RQfUjBff
ports:
- containerPort: 3306
name: master-tdbwv
volumeMounts:
- name: data
mountPath: /var/lib/mysql
resources:
limits:
cpu: 2
memory: 200Mi
nodeName: localhost
---
apiVersion: v1
kind: Service
metadata:
name: master-tdbwv
labels:
name: master-tdbwv
spec:
type: NodePort
ports:
- port: 3306
nodePort:
selector:
name: master-tdbwv
4. 执行k8s 的yaml文件 slave, 文件名:mysql-slave.yaml
确保本地有 /data/mysql_slave_data目录
apiVersion: v1
kind: Pod
metadata:
name: slave-ncrxq
labels:
name: slave-ncrxq
spec:
volumes:
- name: data
hostPath:
path: /data/mysql_slave_data
containers:
- name: slave-ncrxq
image: mysql-slave:v1.0
env:
- name: MYSQL_ROOT_PASSWORD
value: uggTKd3xsIMM
- name: MYSQL_REPLICATION_USER
value: repl
- name: MYSQL_REPLICATION_PASSWORD
value: RQfUjBff
- name: MYSQL_MASTER_SERVICE_HOST
value: 127.0.0.1
ports:
- containerPort: 3306
name: slave-ncrxq
volumeMounts:
- name: data
mountPath: /var/lib/mysql
resources:
limits:
cpu: 2
memory: 200Mi
nodeName: localhost
---
apiVersion: v1
kind: Service
metadata:
name: slave-ncrxq
labels:
name: slave-ncrxq
spec:
type: NodePort
ports:
- port: 3306
nodePort:
selector:
name: slave-ncrxq
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