Docker build MySQL master-slave replication
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Master and slave are respectively installed on the server Docker
1.1 Docker requirements CentOS system kernel version is higher than 3.10
[root@localhost ~]# uname -r 3.10.0-693.el7.x86_641.2 ensure that the yum package up to date.
[root@localhost ~]# sudo yum update Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn base | 3.6 kB 00:00:00 docker-ce-stable | 3.5 kB 00:00:00 extras | 2.9 kB 00:00:00 updates | 2.9 kB 00:00:001.3 installation package needs, yum-util provide yum-config-manager function, the other two are driven dependent devicemapper
[root@localhost ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2 Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn Package yum-utils-1.1.31-52.el7.noarch already installed and latest version Package device-mapper-persistent-data-0.8.5-1.el7.x86_64 already installed and latest version Package 7:lvm2-2.02.185-2.el7_7.2.x86_64 already installed and latest version Nothing to do1.4 Setting yum source
[root@localhost ~]# sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo Loaded plugins: fastestmirror, langpacks adding repo from: https://download.docker.com/linux/centos/docker-ce.repo grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo repo saved to /etc/yum.repos.d/docker-ce.repo1.5 Installation docker
[root@localhost ~]# sudo yum install docker-ce Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.cqu.edu.cn * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn Package 3:docker-ce-19.03.8-3.el7.x86_64 already installed and latest version Nothing to do1.6 Start docker docker and set to start automatically
[root@localhost ~]# sudo systemctl start docker [root@localhost ~]# sudo systemctl enable docker1.7 docker detect whether the installation is successful
[root@localhost ~]# docker version Client: Docker Engine - Community Version: 19.03.8 API version: 1.40 Go version: go1.12.17 Git commit: afacb8b Built: Wed Mar 11 01:27:04 2020 OS/Arch: linux/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.8 API version: 1.40 (minimum version 1.12) Go version: go1.12.17 Git commit: afacb8b Built: Wed Mar 11 01:25:42 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.2.13 GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429 runc: Version: 1.0.0-rc10 GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init: Version: 0.18.0 GitCommit: fec3683 -
docker replace domestic Ali warehouse, download and install MySQL
2.1 docker replace domestic Ali warehouse
sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://rdwyjupq.mirror.aliyuncs.com"] } EOF sudo systemctl daemon-reload sudo systemctl restart docker2.2 Installing MySQL
MySQL 2.2.1 download
[root@localhost ~]# docker pull mysql Using default tag: latest latest: Pulling from library/mysql c499e6d256d6: Pull complete 22c4cdf4ea75: Pull complete 6ff5091a5a30: Pull complete 2fd3d1af9403: Pull complete 0d9d26127d1d: Pull complete 54a67d4e7579: Pull complete fe989230d866: Pull complete 3a808704d40c: Pull complete 826517d07519: Pull complete 69cd125db928: Pull complete b5c43b8c2879: Pull complete 1811572b5ea5: Pull complete Digest: sha256:b69d0b62d02ee1eba8c7aeb32eba1bb678b6cfa4ccfb211a5d7931c7755dc4a8 Status: Downloaded newer image for mysql:latest docker.io/library/mysql:latestMySQL 2.2.2 View Mirror
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE mysql latest 9228ee8bac7a 4 days ago 547MB2.2.3 Creating MySQL mount file directory (log data, configuration)
[root@localhost ~]# mkdir -p /root/mysql/data /root/mysql/logs /root/mysql/conf2.2.4 to start the container (To copy the configuration file) (This practice is redundant, but not very proficient Docker I did not think of a better way to please the god guide)
[root@localhost conf]# docker run -d -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD="123456" mysql 05d161e69f3b2e3e4ebaa50f822934599a31e7ade330e1440a68aec9e404f7ae2.2.5 Copy Profile
[root@localhost conf]# docker cp mysql:/etc/mysql/my.cnf /root/mysql/conf/2.2.6 Stop and delete container
[root@localhost conf]# docker stop mysql mysql [root@localhost conf]# docker rm mysql mysql2.2.7 Restart container (plus mount)
[root@localhost conf]# docker run --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 --mount type=bind,src=/root/mysql/conf/my.cnf,dst=/etc/mysql/my.cnf --mount ty pe=bind,src=/root/mysql/data,dst=/var/lib/mysql --mount type=bind,src=/root/mysql/logs,dst=/logs --restart=on-failure:3 -d mysql64824c7e84ceb3513b65a375c55f2c53bc653f95b119008296122b13ff632ba12.2.8 MySQL query into the existing character set, the result is utf8mb4
show variables like '%char%';2.2.9 change the character set in the mounted configuration file
character-set-server=utf8 default-character-set=utf8 default-character-set=utf82.2.10 restart docker container, and check the character set has changed, proven mount configuration file is valid
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Build a master-slave replication database
3.1 Master Configuration main library
3.1.1 mount into the main library configuration file my.cnf, add the following configuration and restart docker container
[mysqld] ## 同一局域网内注意要唯一 server-id=100 ## 开启二进制日志功能，可以随便取（关键） log-bin=mysql-bin3.1.2 execute the statement in the main Master Library
CREATE USER 'slave'@'%' IDENTIFIED BY '123456'; GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';To prevent given later [Authentication plugin 'caching_sha2_password' can not be loaded], the following statement is executed
ALTER USER 'slave'@'%' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #修改加密规则 ALTER USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY 'password'; #更新一下用户的密码 FLUSH PRIVILEGES; alter user 'slave'@'%' identified by '123456';The last execution statement to obtain File, Position
show master status;3.2 Slave configuration from the library
3.2.1 from the library into the mount configuration file my.cnf, add the following configuration and restart docker container
[mysqld] ## 设置server_id,注意要唯一 server-id=101 ## 开启二进制日志功能，以备Slave作为其它Slave的Master时使用 log-bin=mysql-slave-bin ## relay_log配置中继日志 relay_log=edu-mysql-relay-bin3.2.2 The main link from the library, from the library in the statement is executed
change master to master_host='192.168.47.128', master_user='slave', master_password='123456', master_port=3306, master_log_file='mysql-bin.000001', master_log_pos= 5938, master_connect_retry=30;MASTER_HOST : Master Address
MASTER_PORT : Master port number, port number refers to a container
MASTER_USER : user data for synchronization
master_password : used to synchronize the user's password
MASTER_LOG_FILE : Specifies Slave start copying data from which log file, i.e., File field value in the above-mentioned
master_log_pos value from which to start reading Position, Position i.e. the above-mentioned fields:
master_connect_retry : If the connection fails, retry interval, in seconds, default is 60 seconds
3.2.3 View master-slave synchronization status
show slave status ;
Under normal circumstances, SlaveIORunning and SlaveSQLRunning are No, because we have not turned on the master-slave replication process.
3.2.4 开启主从复制
start slave;
Revisit master-slave synchronization state, and then SlaveIORunning SlaveSQLRunning are Yes, if your SlaveIORunning and SlaveSQLRunning one of which is Connecting or No, to prove wrong configuration, view detailed information being given Last_IO_Error
The main configuration has been deleted from the link information, re-configured in the following command
stop slave;
reset master;
3.2.5 测试主从复制，最简单的方式是在主库建立个新库，这时，从库会自动同步