//启动mysql5.6 容器 挂载配置文件和 数据存储目录 两台机子的docker可以运行
docker run -d -p 3309:3306 --privileged=true  \ -v /docker/mysql/mysql-5.6/conf/mysql.conf.d:/etc/mysql/mysql.conf.d  \    挂载的配置目录 -v /docker/mysql/mysql-5.6/data:/var/lib/mysql \         挂载的数据存储目录 -e MYSQL_ROOT_PASSWORD=密码   \ --name mysql56b mysql:5.6

[root@hd50 mysql.conf.d]# pwd
/docker/mysql/mysql-5.6/conf/mysql.conf.d
[root@hd50 mysql.conf.d]# ls
mysqld.cnf
[root@hd50 mysql.conf.d]# cat 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 as published by
# the Free Software Foundation; version 2 of the License.
#
# 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 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]
lower_case_table_names=1
server_id=2    # 另一台机子为 1    这个为了标志日志的来源
log_bin=/var/lib/mysql/mysql-bin
binlog_format=mixed
auto_increment_increment=2 # 自增步长
auto_increment_offset=2    # 另一台机子为1 自增起始位置pid-file    = /var/run/mysqld/mysqld.pid
socket        = /var/run/mysqld/mysqld.sock
datadir        = /var/lib/mysql
#log-error    = /var/log/mysql/error.log
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0[root@hd50 mysql.conf.d]# 

Last login: Fri Jan 25 19:33:22 2019 from 111.203.45.3

-- 进入容器中
[root@hd49 ~]# docker exec -it mysql56b /bin/bash

-- 进入mysql命令行
root@1694afdf240c:/# mysql -uroot -p数据库密码
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 15
Server version: 5.6.43-log MySQL Community Server (GPL)Copyright (c) 2000, 2019, 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.
-- 查询本机器作为 master的日志情况
mysql> show master status-> ;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 |     1201 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
-- 结尾用 \G 的话会更加清晰
mysql> show master status\G
*************************** 1. row ***************************File: mysql-bin.000004Position: 1201Binlog_Do_DB: Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)mysql>

-- 进入到两台机器的 mysql容器的命令行界面

--进容器的 命令   docker exec -it  容器id  /bin/bash

--通过一下命令 mysql -u用户名  -p密码 进入到mysq的命令行界面

-- 在 A 机器上创建 B 机子可以登录的账户
GRANT replication slave ON *.* TO '用户名a'@'%' IDENTIFIED BY '密码a';
flush privileges;-- 在 B 机器上创建 A 机器可以登录的账户
GRANT replication slave ON *.* TO '用户名b'@'%' IDENTIFIED BY '密码b';
flush privileges;  -- 

-- 给 A 安排master  他的主是 B
change master to master_host='ip b',master_port=3309,master_user='用户名b',master_password='密码b',master_log_file='mysql-bin.000004',master_log_pos=408;

-- 给 B 安排maser  他的主是 A change master to master_host='ip a',master_port=3309,master_user='用户名a',master_password='密码b',master_log_file='mysql-bin.000004',master_log_pos=419; 

mysql> show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 主节点的ipMaster_User: sijiuMaster_Port: 3309Connect_Retry: 60Master_Log_File: mysql-bin.000004Read_Master_Log_Pos: 1326Relay_Log_File: mysqld-relay-bin.000002Relay_Log_Pos: 1201Relay_Master_Log_File: mysql-bin.000004Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 1326Relay_Log_Space: 1375Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 2Master_UUID: b8378125-1faf-11e9-b17a-0242ac110003Master_Info_File: /var/lib/mysql/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update itMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0
1 row in set (0.00 sec)

启动命令为docker run -d -p 8091:80  -p 3307:3306 --name nginx_a   nginx

其中nginx_a 为容器名8091映射容器内端口803307映射容器内端口3306  3306为stream中的listen监听端口

docker cp nginx.conf nginx_a:/etc/nginx/

nginx -s reload

[root@hd50 nginx-1.15.8]# cat nginx.conf user  nginx;
worker_processes  1;error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;events {worker_connections  1024;
}http {include       /etc/nginx/mime.types;default_type  application/octet-stream;log_format  main  '$remote_addr - $remote_user [$time_local] "$request" ''$status $body_bytes_sent "$http_referer" ''"$http_user_agent" "$http_x_forwarded_for"';access_log  /var/log/nginx/access.log  main;sendfile        on;#tcp_nopush     on;keepalive_timeout  65;#gzip  on;include /etc/nginx/conf.d/*.conf;
}
# 相比原来添加了 stream模块
stream {upstream mysql {server ip1:3309 weight=5;server ip2:3309 weight=5;}server {listen 3306 ;# 数据库服务器监听端口proxy_connect_timeout 10s;proxy_timeout 300s; # 设置客户端和代理之间的超时时间，如果5分钟内没有操作将自动断开proxy_pass mysql;}
}