Docker配置mysql主從實現讀寫分離
阿新 • • 發佈：2019-01-09
1. 獲取mysql映象
- 獲取映象
$ sudo docker pull mysql
- 檢視映象
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql latest 7d83a47ab2d2 4 weeks ago 408MB
2. 安裝mysql-client，用於訪問mysql容器資料庫
$ sudo apt-get install mysql-client-core-5.7
3.建立工作目錄,儲存mysql資料
$ cd ~
$ mkdir docker-mysql-data
$ cd docker-mysql-data
$ mkdir mysql-master
$ mkdir mysql-slave1
4.建立主從mysql配置檔案
- 建立主mysql配置檔案
cd ~/docker-mysql-data
$ vim my-master.cnf
複製如下配置：
# Copyright (c) 2014, 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 Community Server configuration file. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql explicit_defaults_for_timestamp log-bin = mysql-bin server-id = 1 # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. #bind-address = 127.0.0.1 #log-error = /var/log/mysql/error.log # Recommended in standard MySQL setup sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # * IMPORTANT: Additional settings that can override those from this file! # The files must end with '.cnf', otherwise they'll be ignored. # !includedir /etc/mysql/conf.d/
- 建立從mysql配置檔案
cd ~/docker-mysql-data
$ vim my-slave1.cnf
複製主mysql配置檔案，注意：
將server-id = 1 修改為server-id = 2
5.執行主myqsl容器
$ sudo docker run -d -e MYSQL_ROOT_PASSWORD=123456 --name mysql-master -v /home/yangqian/docker-mysql-data/mysql-master:/var/lib/mysql -v /home/yangqian/docker-mysql-data/my-master.cnf:/etc/mysql/my.cnf -p 3306:3306 mysql
引數詳解：
run 執行一個容器
--name 後面是這個映象的名稱
-p 3306:3306 表示在這個容器中使用3306埠(第二個)對映到本機的埠號也為3306(第一個)
-d 表示使用守護程序執行，即服務掛在後臺
- 檢視主mysql容器狀態： ``` $ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e37e29f090b7 mysql "docker-entrypoint.s…" 27 minutes ago Up 27 minutes 0.0.0.0:3306->3306/tcp mysql-master
* 連線資料庫檢視
$ mysql -uroot -p123456 -h127.0.0.1
## 6.執行從mysql容器
$ sudo docker run -d -e MYSQL_ROOT_PASSWORD=123456 --name mysql-slave1 -v /home/yangqian/docker-mysql-data/mysql-slave1:/var/lib/mysql -v /home/yangqian/docker-mysql-data/my-slave1.cnf:/etc/mysql/my.cnf -p 3307:3306 mysql
* 檢視mysql容器狀態：
$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3dc37943fb7a mysql "docker-entrypoint.s…" 12 seconds ago Up 11 seconds 0.0.0.0:3307->3306/tcp mysql-slave1 e37e29f090b7 mysql "docker-entrypoint.s…" 31 minutes ago Up 31 minutes 0.0.0.0:3306->3306/tcp mysql-master
* 連線資料庫檢視
$ mysql -uroot -p123456 -h127.0.0.1 --port 3307
## 7. 主從服務配置
* 檢視容器ip,後面主從服務配置需要用到兩個容器的ip
檢視mysql容器id
$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3dc37943fb7a mysql "docker-entrypoint.s…" 8 minutes ago Up 8 minutes 0.0.0.0:3307->3306/tcp mysql-slave1 e37e29f090b7 mysql "docker-entrypoint.s…" 39 minutes ago Up 39 minutes 0.0.0.0:3306->3306/tcp mysql-master
```
# 進入主mysql容器終端
$ sudo docker exec -it e3 /bin/bash
[email protected]:/# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
27: [email protected]: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
[email protected]:/# exit
exit
# 進入從mysql容器終端
$ sudo docker exec -it 3d /bin/bash
[email protected]:/# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
29: [email protected]: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
[email protected]:/# exit
exit
- 開啟兩個終端分別用來連線主從mysql容器
# 終端1：主mysql容器 $ mysql -uroot -p123456 -h127.0.0.1 --port 3306 # 終端2：從mysql容器 $ mysql -uroot -p123456 -h127.0.0.1 --port 3307 - 主mysql容器配置
mysql> grant replication slave on *.* to 'slave'@'%' identified by 'slave';
mysql> flush privileges;
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 | 1160 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
- 從mysql容器配置
mysql> change master to master_host='172.17.0.2',master_user='slave',master_password='slave',
master_log_file='mysql-bin.000004',master_log_pos=1160,master_port=3306;
mysql> start slave;
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.17.0.2
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 1160
Relay_Log_File: 3dc37943fb7a-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 1160
Relay_Log_Space: 534
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_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: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 39f6cd9a-f870-11e7-b14e-0242ac110002
Master_Info_File: /var/lib/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)