Acoplable clave para construir una replicación MySQL maestro-esclavo a través del anfitrión

MySQL presentación maestro-esclavo

• En un entorno de producción, una base de datos de un solo nodo es muy peligroso, en caso de fallo de nuestros datos no se pueden recuperar. En este artículo se describe la copia de seguridad de datos a través del anfitrión MySQL 5.7 basada en acoplable acumulación

preparativos

• En primer lugar, crear una red de superposición cruzada anfitrión, pero no el socio menor Haga clic aquí para ver la reddocker network ls

[root@gpu03 docker]# docker network ls
NETWORK ID          NAME                            DRIVER              SCOPE
d0f2d68382d9        bridge                          bridge              local
b519d6da2092        docker_default                  bridge              local
ec949a93ee57        host                            host                local
kvt9ibn4tua4        ingress                         overlay             swarm
a93c3b19194a        none                            null                local
1fx2olvzn3os        sg                              overlay             swarm

La parte inferior sges lo que nos basamos swarmcreación de overlayla red

• Ver nodenodo

[root@gpu03 docker]# docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
sflpfedy8d3qrbt4izkmezq2g *   gpu03               Ready               Active              Leader              19.03.2
ae2swiz3fhd2ma3yeure5s72h     sangang             Ready               Active                                  19.03.8

Podemos ver que además del gpu03nodo, así como sangangun nodo, entonces se crea un nodo en gpu03 mysql-masterservicio, la creación de nodos Sangang mysql-slaveservicio

Crear un servicio de mysql-master

• Crear varios directorios bajo el directorio ventana acoplable

[root@gpu03 docker]# ls
conf  data  docker-compose.yml  init-d

• Crear un archivo de variable de entorno .env

[root@gpu03 docker]# vim .env
MYSQL_ROOT_PASSWORD=root
MYSQL_MASTER_SERVICE_NAME=mysql-master
MYSQL_MASTER_SERVICE_USER=sangang
MYSQL_MASTER_SERVICE_PASSWORD=sangang
MYSQL_MASTER_SERVICE_POST=3306

• Crear un fichero my.cnf

[root@gpu03 docker]# vim conf/my.cnf
[mysqld]
server-id=1
log-bin=mysql-bin

• Crear un archivo init-master.sh

[root@gpu03 docker]# vim init-d/init-master.sh
#!/bin/bash
mysql -uroot -p$MYSQL_ROOT_PASSWORD << EOF
CREATE USER '$MYSQL_MASTER_SERVICE_USER'@'%' IDENTIFIED BY '$MYSQL_MASTER_SERVICE_PASSWORD';
GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO '$MYSQL_MASTER_SERVICE_USER'@'%';
EOF

• Crear una ventana acoplable-compose.yml

[root@gpu03 docker]# vim docker-compose.yml
version: '3'
services:
  mysql-master:
    image: mysql:5.7
    container_name: mysql-master
    restart: always
    env_file:
      - .env
    environment:
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - TZ=Asia/Shanghai
    ports:
      - "3339:3306"
    networks:
      - sg
    volumes:
      - ./conf/my.cnf:/etc/my.cnf
      - ./data:/var/lib/mysql
      - ./init-d/init-master.sh:/docker-entrypoint-initdb.d/1-init-master.sh

networks:
  sg:
    external: true

• comienzodocker-compose up -d
• Ver registrodocker logs -f mysql-master

Crear un servicio de mysql-esclavo

• Crear varios directorios bajo el directorio ventana acoplable -

[root@sangang docker]# ls
conf  data  docker-compose.yml  init-d

• Crear un archivo de variable de entorno .env

[root@sangang docker]# vim .env
MYSQL_ROOT_PASSWORD=root
MYSQL_MASTER_SERVICE_NAME=mysql-master
MYSQL_MASTER_SERVICE_USER=sangang
MYSQL_MASTER_SERVICE_PASSWORD=sangang
MYSQL_MASTER_SERVICE_POST=3306

• Crear un fichero my.cnf

[root@sangang docker]# vim conf/my.cnf
[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-bin

• Crear un archivo init-salve.sh

[root@sangang docker]# vim init-d/init-slave.sh
#!/bin/bash
mysql -uroot -p$MYSQL_ROOT_PASSWORD << EOF
change master to master_host='$MYSQL_MASTER_SERVICE_NAME',master_user='$MYSQL_MASTER_SERVICE_USER', master_password='$MYSQL_MASTER_SERVICE_PASSWORD',master_port=$MYSQL_MASTER_SERVICE_POST;
start slave;
EOF

• Crear una ventana acoplable-compose.yml

[root@sangang docker]# vim docker-compose.yml
version: '3'
services:
  mysql-master:
    image: mysql:5.7
    container_name: mysql-slave
    restart: always
    env_file:
      - .env
    environment:
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - TZ=Asia/Shanghai
    ports:
      - "3306:3306"
    networks:
      - sg
    volumes:
      - ./conf/my.cnf:/etc/my.cnf
      - ./data:/var/lib/mysql
      - ./init-d/init-slave.sh:/docker-entrypoint-initdb.d/1-init-slave.sh

networks:
  sg:
    external: true

• comienzodocker-compose up -d
• Ver registrodocker logs -f mysql-slave
• Ingrese para ver el estado mysql-esclavo

sangang@sangang:~/docker$ docker exec -it mysql-slave bash
root@417cbe900756:/# mysql -uroot -proot
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 5
Server version: 5.7.29-log MySQL Community Server (GPL)

Copyright (c) 2000, 2020, 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 slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: mysql-master
                  Master_User: sangang
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 316
               Relay_Log_File: edu-mysql-relay-bin.000006
                Relay_Log_Pos: 529
        Relay_Master_Log_File: mysql-bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

Podemos ver las dos propiedades son Yes, lo que indica un éxito

• Slave_IO_Running: Yes
• Slave_SQL_Running: Yes

verificación

• Iniciar sesión mysql-master y crear una base de datos

[root@gpu03 docker]# docker exec -it mysql-master bash
root@3f61cceebbab:/# mysql -uroot -proot
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 7
Server version: 5.7.29-log MySQL Community Server (GPL)

Copyright (c) 2000, 2020, 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> create database video;
Query OK, 1 row affected (0.01 sec)

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

mysql> 

• Inicia sesión para ver la base de datos mysql-esclavo

sangang@sangang:~/docker$ docker exec -it mysql-slave bash
root@417cbe900756:/# mysql -uroot -proot
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 6
Server version: 5.7.29-log MySQL Community Server (GPL)

Copyright (c) 2000, 2020, 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                |
| video              |
+--------------------+
5 rows in set (0.07 sec)

mysql> 

• Podemos ver existen bibliotecas mysql-esclavo
• 结束