El clúster de enjambre de Docker implementa MySQL

preparar materiales

1. mysql.config
2. SQL de inicialización del nodo secundario Init.d

1. Preparar mysqld.cnf

# Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is also distributed with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation.  The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have included with MySQL.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#
# The MySQL  Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
#log-error      = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address   = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#sql-mode=NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
sql-mode=NO_ENGINE_SUBSTITUTION
#user=mysql
#default-storage-engine=INNODB
character-set-server=utf8mb4
default-time_zone = '+8:00'
max_connections=100000

server_id=1
log_bin=mysql-bin
## 需要主从复制的数据库 根据自己的需求定义
binlog-do-db=nacos_config
binlog-do-db=abc_config

## 复制过滤：也就是指定哪个数据库不用同步（mysql库一般不同步）
binlog-ignore-db=mysql

## 为每个session分配的内存，在事务过程中用来存储二进制日志的缓存
binlog_cache_size=1M

## 主从复制的格式（mixed,statement,row，默认格式是statement。建议是设置为row，主从复制时数据更加能够统一）
binlog_format=row

## 二进制日志自动删除/过期的天数。默认值为0，表示不自动删除。
expire_logs_days=7

## 跳过主从复制中遇到的所有错误或指定类型的错误，避免slave端复制中断。
## 如：1062错误是指一些主键重复，1032错误是因为主从数据库数据不一致
slave_skip_errors=1062

skip-name-resolve

[client]
default-character-set=utf8mb4
[mysql]
default-character-set=utf8mb4

2. SQL de inicialización del nodo secundario Init.d

change master to master_host='mysql-n1',master_port=3306,master_user='root',master_password='a123456',master_log_file='mysql-bin.000003',master_log_pos=0;

start slave;

Escribir pila-componer

version: '3.7'
services:
  mysql-n1:
    image: mysql:8.0.21
    hostname: mysql-n1
    ports:
      - 3306:3306
    user: root
    restart: always
    environment:
      - MYSQL_ROOT_HOST=%
      - MYSQL_ROOT_PASSWORD=a123456
      - TZ=Asia/Shanghai
    volumes:
      # 和docker-compose 不一样的是要提前创建，否则会报错，如果
      - ./data/mysql-n1/db:/var/lib/mysql
      - ./data/mysql-n1/logs:/var/log/mysql/
      - ./init.d/master:/docker-entrypoint-initdb.d/:ro
      - ./config:/etc/mysql/conf.d/:rw
    command:
      - "--server-id=1"
      - "--default-authentication-plugin=mysql_native_password"
      - "--character-set-server=utf8mb4"
      - "--collation-server=utf8mb4_general_ci"
      - "--explicit_defaults_for_timestamp=true"
      - "--lower_case_table_names=1"
      - "--binlog-ignore-db=mysql"
      - "--binlog_format=row"
      - "--log-bin=mysql-bin"
      - "--sync_binlog=1"
      - "--expire_logs_days=7"
      - "--slave_skip_errors=1062"
    networks:
      - test-overlay
    deploy:
      placement:
        constraints:
          - node.hostname == n1
          - node.role == manager
  mysql-n2:
    image: mysql:8.0.21
    hostname: mysql-n2
    user: root
    restart: always
    environment:
      - MYSQL_ROOT_HOST=%
      - MYSQL_ROOT_PASSWORD=a123456
      - TZ=Asia/Shanghai
    volumes:
      - ./data/mysql-n2/db:/var/lib/mysql
      - ./data/mysql-n2/logs:/var/log/mysql/
      - ./init.d/slave/:/docker-entrypoint-initdb.d/:ro
    command:
      - "--server-id=2"
      - "--default-authentication-plugin=mysql_native_password"
      - "--character-set-server=utf8mb4"
      - "--collation-server=utf8mb4_general_ci"
      - "--explicit_defaults_for_timestamp=true"
      - "--lower_case_table_names=1"
      - "--binlog-ignore-db=mysql"
      - "--binlog_format=row"
      - "--log-bin=mysql-bin"
      - "--sync_binlog=1"
      - "--expire_logs_days=7"
      - "--slave_skip_errors=1062"
    depends_on:
      - mysql-n1
    networks:
      - test-overlay
    deploy:
      placement:
        constraints:
          - node.hostname == n2
          - node.role == worker
  mysql-n3:
    image: mysql:8.0.21
    hostname: mysql-n3
    user: root
    restart: always
    environment:
      - MYSQL_ROOT_HOST=%
      - MYSQL_ROOT_PASSWORD=a123456
      - TZ=Asia/Shanghai
    volumes:
      - ./data/mysql-n3/db:/var/lib/mysql
      - ./data/mysql-n3/logs:/var/log/mysql/
      - ./init.d/slave:/docker-entrypoint-initdb.d/:ro
      - ./config:/etc/mysql/conf.d/:rw
    command:
      - "--server-id=3"
      - "--default-authentication-plugin=mysql_native_password"
      - "--character-set-server=utf8mb4"
      - "--collation-server=utf8mb4_general_ci"
      - "--explicit_defaults_for_timestamp=true"
      - "--lower_case_table_names=1"
      - "--binlog-ignore-db=mysql"
      - "--binlog_format=row"
      - "--log-bin=mysql-bin"
      - "--sync_binlog=1"
      - "--expire_logs_days=7"
      - "--slave_skip_errors=1062"
    depends_on:
      - mysql-n1
      - mysql-n2
    networks:
      - test-overlay
    deploy:
      placement:
        constraints:
          - node.hostname == n3
          - node.role == worker

networks:
  test-overlay:
    driver: overlay
    #false-统自动创建网桥名,格式为: 目录名_网桥名，默认为false; true-使用外部创建的网桥，需需要自己手动创建
    external: true

node.hostname representa el nombre del host
node.role representa la autoridad del nodo

Implementar docker stack deployment --with-registry-auth -c stack-compose.yml mysql