022、Python+fastapi，第一个Python项目走向第22步：ubuntu 24.04 docker 安装mysql8集群、redis集群（三）

本文主要是介绍022、Python+fastapi，第一个Python项目走向第22步：ubuntu 24.04 docker 安装mysql8集群、redis集群（三），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

 这次来安装mysql8了，以前安装不是docker安装，这个我也是第一次，人人都有第一次嚒

---

前言

前面的redis安装还是花了点时间的，主要是网上教程，各有各的好，大家千万别取其长处，个人觉得这个环境影响很大？反正我照着装很多也不能安装完成。

这次安装mysql希望快点，不过也没关系，陪娃做作业，我就安装这玩意

我们直接安装集群。看时间允许，我们也安装个单机版的

---

一、MGR简介

        确保数据库稳定运行是DBA核心价值之一。通过搭建灾备库，利用复制技术同步主库的数据更新，在主库不可用时，启用备库可以快速恢复数据库服务，减少对业务的影响，同时，备库也可用于负载均衡、数据备份、统计报表等场景。带来诸多好处的同时，自然也有其弊端：增加了额外的硬件、维护成本，以及复制中主从数据延迟或不一致等多种问题。MySQL在3.23.15版本中新增了复制功能，接下来是一系列的增强和优化：row based，半同步复制，GTID，多线程，多源复制，组复制等，本文使用2016年底官方GA的Group Replicaion(下文简称MGR)

架构图： 

• MGR（MySQL Group Replication）是MySQL 5.7.17提出的集群方案，它既可以很好地保证数据一致性，又具备故障检测和转移功能，MGR还支持多节点写入，这是一项被普遍看好的技术。 
• MGR（MySQL Group Replication）是MySQL自带的一个插件，可以灵活部署。MySQL MGR集群是多个MySQL Server节点共同组成的分布式集群，每个Server都有完整的副本，它是基于行（ROW）格式的二进制日志文件。
• MGR是一个多主结构，通过组复制（Group Replication）机制实现各节点数据的一致性，这与Replication的异步复制、PXC的同步复制都不相同。
• 如图所示，DB1、DB2、DB3构成的MGR集群，集群中每个DB都有MGR层，MGR层功能也可简单理解为由Paxos模块和冲突检测Certify模块实现
• Paxos模块基于Paxos算法，确保所有节点收到相同广播消息，Transactionmessage（交易信息）就是广播消息的内容结构；冲突检测Certify（保证）模块进行冲突检测确保数据的最终一致性。
• 当DB1上有事务T1要执行时，T1对DB1来说是本地事务，对于DB2、DB3来说是远端事务；DB1在事务T1被执行后，会把执行事务T1的信息广播给集群中各个节点，包括DB1本身；通过Paxos模块广播给MGR集群中的各个节点，半数以上的节点同意并且达成共识，之后共识信息进入各个节点的冲突检测Certify模块，各个节点各自进行冲突检测验证，最终保证事务在集群中的最终一致性。
• 在冲突检测通过之后，本地事务T1在DB1直接提交即可，否则直接回滚。远端事务T1在DB2和DB3分别先更新到relaylog，然后应用到binlog，完成数据的同步，否则直接放弃该事务。
• 优点：避免脑裂：MGR中不会出现脑裂的现象；数据一致性保障：MGR的冗余能力很好，能够保证Binlog Event至少被复制到超过一半的成员上，只要同时宕机的成员不超过半数便不会导致数据丢失

 二、集群安装

1、环境

victor_t400@victort400:/home$ uname -a
Linux victort400 6.8.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 00:40:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
victor_t400@victort400:/home$ docker --version
Docker version 24.0.7, build 24.0.7-0ubuntu4

2、拉取镜像

victor_t400@victort400:/home$ docker pull mysql:8.0.20
8.0.20: Pulling from library/mysql

Digest: sha256:8b7b328a7ff6de46ef96bcf83af048cb00a1c86282bfca0cb119c84568b4caf6
Status: Downloaded newer image for mysql:8.0.20
docker.io/library/mysql:8.0.20
victor_t400@victort400:/home$ docker images
REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
mysql        latest    8251f0669c6e   3 days ago    623MB
redis        latest    9509c4dd19fb   4 weeks ago   116MB
mysql        8.0.20    be0dbf01a0f3   3 years ago   541MB
 

3、创建容器网络

victor_t400@victort400:/home$ docker network create --subnet=172.72.0.0/24 mysql-net
96ab815083147c7bdba564c92585ee6d0b64e923beea43844f1c8c9eb08a0b71
victor_t400@victort400:/home$docker network ls
NETWORK ID     NAME        DRIVER    SCOPE
90725f91b3dc   bridge      bridge    local
d009f7a9343b   host        host      local
96ab81508314   mysql-net   bridge    local
f9c89145d9ab   none        null      local
a09e80dd0716   redis-net   bridge    local
 

4、创建mysql的数据目录 

sudo mkdir -p /home/mysql-mgr/mysql-mgr-master/conf.d
sudo mkdir -p /home/mysql-mgr/mysql-mgr-master/data
sudo mkdir -p /home/mysql-mgr/mysql-mgr-slave01/conf.d
sudo mkdir -p /home/mysql-mgr/mysql-mgr-slave01/data
sudo mkdir -p /home/mysql-mgr/mysql-mgr-slave02/conf.d
sudo mkdir -p /home/mysql-mgr/mysql-mgr-slave02/data

5、拉起容器 

密码设置不要用123456，这个就可以 LzloveYou123!

docker run -d --name mysql-mgr-master -h mysql-mgr-master \-p 13066:3306 -p 33011:33011 \--net=mysql-net --ip 172.72.0.101 \-v /home/mysql-mgr/mysql-mgr-master/conf.d:/etc/mysql/conf.d \-v /home/mysql-mgr/mysql-mgr-master/data:/var/lib/mysql/ \-e MYSQL_ROOT_PASSWORD=123456 \-e TZ=Asia/Shanghai \--privileged=true mysql:8.0.20

docker run -d --name mysql-mgr-slave01 -h mysql-mgr-slave01 \-p 23066:3306 -p 33012:33012 \--net=mysql-net --ip 172.72.0.102 \-v /home/mysql-mgr/mysql-mgr-slave01/conf.d:/etc/mysql/conf.d \-v /home/mysql-mgr/mysql-mgr-slave01/data:/var/lib/mysql/ \-e MYSQL_ROOT_PASSWORD=123456 \-e TZ=Asia/Shanghai \--privileged=true mysql:8.0.20

docker run -d --name mysql-mgr-slave02 -h mysql-mgr-slave02 \-p 33066:3306 -p 33013:33013 \--net=mysql-net --ip 172.72.0.103 \-v /home/mysql-mgr/mysql-mgr-slave02/conf.d:/etc/mysql/conf.d \-v /home/mysql-mgr/mysql-mgr-slave02/data:/var/lib/mysql/ \-e MYSQL_ROOT_PASSWORD=123456 \-e TZ=Asia/Shanghai \--privileged=true mysql:8.0.20

 victor_t400@victort400:/home/mysql-mgr$ docker ps -a
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS                                                                                                   NAMES
26b69bc2a374   mysql     "docker-entrypoint.s…"   4 seconds ago   Up 2 seconds   0.0.0.0:33011->33011/tcp, :::33011->33011/tcp, 33060/tcp, 0.0.0.0:13066->3306/tcp, :::13066->3306/tcp   mysql-mgr-master
ee9ac39c7cf9   mysql     "docker-entrypoint.s…"   2 minutes ago   Up 2 minutes   0.0.0.0:33012->33012/tcp, :::33012->33012/tcp, 33060/tcp, 0.0.0.0:23066->3306/tcp, :::23066->3306/tcp   mysql-mgr-slave01
20f7e28c414e   mysql     "docker-entrypoint.s…"   2 minutes ago   Up 2 minutes   0.0.0.0:33013->33013/tcp, :::33013->33013/tcp, 33060/tcp, 0.0.0.0:33066->3306/tcp, :::33066->3306/tcp   mysql-mgr-slave02

这样就建了3个docker容器节点，运行了起来

6、修改配置mysql参数配置文件

a、删除旧的配置文件

sudo rm -rf /home/mysql-mgr/mysql-mgr-master/conf.d/my.cnf
sudo rm -rf /home/mysql-mgr/mysql-mgr-slave01/conf.d/my.cnf
sudo rm -rf /home/mysql-mgr/mysql-mgr-slave02/conf.d/my.cnf

b、mysql-mgr集群master配置文件

sudo touch /home/mysql-mgr/mysql-mgr-master/conf.d/my.cnf
sudo chmod 777 /home/mysql-mgr/mysql-mgr-master/conf.d/my.cnf
sudo cat > /home/mysql-mgr/mysql-mgr-master/conf.d/my.cnf <<"EOF"
[mysqld]
user=mysql
port=3306
character_set_server=utf8mb4
secure_file_priv=''
server-id = 2024050401
default-time-zone = '+8:00'log_timestamps = SYSTEM
log-bin = 
binlog_format=row
binlog_checksum=NONE
log-slave-updates=1
skip-name-resolve
auto-increment-increment=2
auto-increment-offset=1
gtid-mode=ON
enforce-gtid-consistency=on
default_authentication_plugin=mysql_native_password
max_allowed_packet = 500Mmaster_info_repository=TABLE
relay_log_info_repository=TABLE
relay_log=mysql-mgr-master-relay-bin-ip101transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=OFF
loose-group_replication_local_address= "172.72.0.101:33011"
loose-group_replication_group_seeds= "172.72.0.101:33011,172.72.0.102:33012,172.72.0.103:33013"
loose-group_replication_bootstrap_group=OFF
loose-group_replication_ip_whitelist="172.72.0.101,172.72.0.102,172.72.0.103"report_host=172.72.0.101
report_port=3306EOF

c、 mysql-mgr集群slave01配置文件

sudo touch /home/mysql-mgr/mysql-mgr-slave01/conf.d/my.cnf
sudo chmod 777 /home/mysql-mgr/mysql-mgr-slave01/conf.d/my.cnf
sudo cat >  /home/mysql-mgr/mysql-mgr-slave01/conf.d/my.cnf <<"EOF"
[mysqld]
user=mysql
port=3306
character_set_server=utf8mb4
secure_file_priv=''
server-id = 2024050402
default-time-zone = '+8:00'
log_timestamps = SYSTEM
log-bin = 
binlog_format=row
binlog_checksum=NONE
log-slave-updates=1
gtid-mode=ON
enforce-gtid-consistency=ON
skip_name_resolve
default_authentication_plugin=mysql_native_password
max_allowed_packet = 500Mmaster_info_repository=TABLE
relay_log_info_repository=TABLE
relay_log=mysql-mgr-slave-relay-bin-ip102transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=OFFloose-group_replication_local_address= "172.72.0.102:33012"
loose-group_replication_group_seeds= "172.72.0.101:33011,172.72.0.102:33012,172.72.0.103:33013"loose-group_replication_bootstrap_group=OFF
loose-group_replication_ip_whitelist="172.72.0.101,172.72.0.102,172.72.0.103"report_host=172.72.0.102
report_port=3306EOF

d、 mysql-mgr集群slave02配置文件

sudo touch /home/mysql-mgr/mysql-mgr-slave02/conf.d/my.cnf
sudo chmod 777 /home/mysql-mgr/mysql-mgr-slave02/conf.d/my.cnf
sudo cat > /home/mysql-mgr/mysql-mgr-slave02/conf.d/my.cnf <<"EOF"
[mysqld]
user=mysql
port=3306
character_set_server=utf8mb4
secure_file_priv=''
server-id = 2024050403
default-time-zone = '+8:00'
log_timestamps = SYSTEM
log-bin = 
binlog_format=row
binlog_checksum=NONE
log-slave-updates=1
gtid-mode=ON
enforce-gtid-consistency=ON
skip_name_resolve
default_authentication_plugin=mysql_native_password
max_allowed_packet = 500Mmaster_info_repository=TABLE
relay_log_info_repository=TABLE
relay_log=mysql-mgr-slave-relay-bin-ip103transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
loose-group_replication_start_on_boot=OFF
loose-group_replication_local_address= "172.72.0.103:33013"
loose-group_replication_group_seeds= "172.72.0.101:33011,172.72.0.102:33012,172.72.0.103:33013"
loose-group_replication_bootstrap_group=OFF
loose-group_replication_ip_whitelist="172.72.0.101,172.72.0.102,172.72.0.103"report_host=172.72.0.103
report_port=3306EOF

sudo chmod 644 /home/mysql-mgr/mysql-mgr-master/conf.d/my.cnf
sudo chmod 644 /home/mysql-mgr/mysql-mgr-slave01/conf.d/my.cnf
sudo chmod 644 /home/mysql-mgr/mysql-mgr-slave02/conf.d/my.cnf

7、重启容器

docker restart `docker ps -a |grep mysql-mgr |awk -F " " '{print $1}'`

 结果：

victor_t400@victort400:/home$ docker restart `docker ps -a |grep mysql-mgr |awk -F " " '{print $1}'`
3bba9175355e
329c7a28c17c
68df336dad9b

8、进入容器，配置集群

a、进入主节点

红色部分代表要操作的 

进入主节点容器

victor_t400@victort400:/home$ docker exec -it mysql-mgr-master /bin/bash

登录mysql
root@mysql-mgr-master:/# mysql -uroot -p

输入密码
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.20 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.

查看hostname，server_id和server_uuid

mysql> select @@hostname,@@server_id,@@server_uuid;
+------------------+-------------+--------------------------------------+
| @@hostname       | @@server_id | @@server_uuid                        |
+------------------+-------------+--------------------------------------+
| mysql-mgr-master |  2024050401 | 54c9ae3b-09f8-11ef-9b8d-0242ac480065 |
+------------------+-------------+--------------------------------------+
1 row in set (0.01 sec)

主节点安装MGR插件

mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Query OK, 0 rows affected (0.06 sec)

显示安装的插件

mysql> show plugins;
+---------------------------------+----------+--------------------+----------------------+---------+
| Name                            | Status   | Type               | Library              | License |
+---------------------------------+----------+--------------------+----------------------+---------+
太多了，删除一部分
| mysqlx_cache_cleaner            | ACTIVE   | AUDIT              | NULL                 | GPL     |
| mysqlx                          | ACTIVE   | DAEMON             | NULL                 | GPL     |
| group_replication               | ACTIVE   | GROUP REPLICATION  | group_replication.so | GPL     |
+---------------------------------+----------+--------------------+----------------------+---------+
45 rows in set (0.01 sec)

这里开始设置复制账号（所有节点执行）

mysql> SET SQL_LOG_BIN=0;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE USER repl@'%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.04 sec)

mysql> GRANT REPLICATION SLAVE ON *.* TO repl@'%';
Query OK, 0 rows affected (0.04 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

mysql> SET SQL_LOG_BIN=1;
Query OK, 0 rows affected (0.00 sec)

mysql> CHANGE MASTER TO MASTER_USER='repl', MASTER_PASSWORD='123456' FOR CHANNEL 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.74 sec)

启动MGR主模式，启动MGR，在主库上执行

mysql> SET GLOBAL group_replication_bootstrap_group=ON;
Query OK, 0 rows affected (0.00 sec)

mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (4.43 sec)

mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
Query OK, 0 rows affected (0.00 sec)

查看MGR组信息 

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST  | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 54c9ae3b-09f8-11ef-9b8d-0242ac480065 | 172.72.0.101 |        3306 | ONLINE       | PRIMARY     | 8.0.20         |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
1 row in set (0.00 sec)

mysql>
 

重启了一下，就全关了，为什么啊为什么啊，前面拉起时，没有--restart always 设置，所以不自启动，后面我们再来设置，现在用下面的来

victor_t400@victort400:~$ docker start 26b69bc2a374
26b69bc2a374
victor_t400@victort400:~$ docker start ee9ac39c7cf9
ee9ac39c7cf9
victor_t400@victort400:~$ docker start 20f7e28c414e
20f7e28c414e

docker update --restart=always   容器名称

b、进入slave01节点 

进入从节点01容器

victor_t400@victort400:/home$ docker exec -it mysql-mgr-slave01 /bin/bash

进入数据库
root@mysql-mgr-slave01:/# mysql -uroot -p
Enter password:在这里搞半天，输入密码不行，结果是不需要密码，不是明明我前面设置密码的，而且和主节点一模一样，主节点需要密码，他不要，你说见鬼了，
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 17
Server version: 8.0.20 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.

slave01安装MGR插件
mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Query OK, 0 rows affected (0.07 sec)

显示插件

mysql> show plugins;
+---------------------------------+----------+--------------------+----------------------+---------+
| Name                            | Status   | Type               | Library              | License |
+---------------------------------+----------+--------------------+----------------------+---------+
| binlog                          | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
。。。。。。。
| mysqlx_cache_cleaner            | ACTIVE   | AUDIT              | NULL                 | GPL     |
| mysqlx                          | ACTIVE   | DAEMON             | NULL                 | GPL     |
| group_replication               | ACTIVE   | GROUP REPLICATION  | group_replication.so | GPL     |
+---------------------------------+----------+--------------------+----------------------+---------+
45 rows in set (0.00 sec)

设置复制账号

mysql> SET SQL_LOG_BIN=0;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE USER repl@'%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.09 sec)

mysql> GRANT REPLICATION SLAVE ON *.* TO repl@'%';
Query OK, 0 rows affected (0.06 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> SET SQL_LOG_BIN=1;
Query OK, 0 rows affected (0.00 sec)

mysql> CHANGE MASTER TO MASTER_USER='repl', MASTER_PASSWORD='123456' FOR CHANNEL 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.64 sec)

加入MGR从节点01：

mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (5.02 sec)

查看MGR组信息，有两个了

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST  | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 54c9ae3b-09f8-11ef-9b8d-0242ac480065 | 172.72.0.101 |        3306 | ONLINE       | PRIMARY     | 8.0.20         |
| group_replication_applier | 6607103a-09f8-11ef-bb93-0242ac480066 | 172.72.0.102 |        3306 | RECOVERING   | SECONDARY   | 8.0.20         |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
2 rows in set (0.00 sec)

mysql>
 

c、进入进入slave02节点

和节点slave01一样，就不说明了，一步一步来好了，有些可以一起执行，但是一步步好像也不费什么事情 

docker exec -it mysql-mgr-slave02 bash
--------------------------- 
mysql -uroot -p
-------------------------------
-----后面都是在mysql执行，可以一把梭
INSTALL PLUGIN group_replication SONAME 'group_replication.so';
show plugins;
SET SQL_LOG_BIN=0;
CREATE USER repl@'%' IDENTIFIED BY '123456';
GRANT REPLICATION SLAVE ON *.* TO repl@'%';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='repl', MASTER_PASSWORD='123456' FOR CHANNEL 'group_replication_recovery';
START GROUP_REPLICATION;
SELECT * FROM performance_schema.replication_group_members;

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST  | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 54c9ae3b-09f8-11ef-9b8d-0242ac480065 | 172.72.0.101 |        3306 | ONLINE       | PRIMARY     | 8.0.20         |
| group_replication_applier | 6607103a-09f8-11ef-bb93-0242ac480066 | 172.72.0.102 |        3306 | ONLINE       | SECONDARY   | 8.0.20         |
| group_replication_applier | 6dedeb9f-09f8-11ef-8447-0242ac480067 | 172.72.0.103 |        3306 | ONLINE       | SECONDARY   | 8.0.20         |
+---------------------------+--------------------------------------+--------------+-------------+--------------+-------------+----------------+
3 rows in set (0.00 sec)

 

这里可以看到3个都online 下面就测试了

只有主节点可以写入，其他节点只读，MGR单主模式搭建成功。

 9、测试一下

内网测试（docker内网，我们进入到容器里面测试的）

目前我们还在slave02节点，下面创建一个数据库，结果--super-read-only应该是只读的意思，不让写

mysql> CREATE DATABASE test_mgr CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ERROR 1290 (HY000): The MySQL server is running with the --super-read-only option so it cannot execute this statement

那我们退出 slave02节点，进入slave01节点

victor_t400@victort400:/home$ docker exec -it mysql-mgr-slave01 /bin/bash
root@mysql-mgr-slave01:/# mysql -uroot -p
Enter password:我是直接回车

mysql> CREATE DATABASE test_mgr CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ERROR 1290 (HY000): The MySQL server is running with the --super-read-only option so it cannot execute this statement
mysql>

那我们重新打开一个ssh终端 ，进入主节点，可以看到，同样代码，主节点是可以创建数据库的

victor_t400@victort400:~$ docker exec -it mysql-mgr-master /bin/bash                                                                                
root@mysql-mgr-master:/# mysql -uroot -p
Enter password:这里要输密码

mysql> CREATE DATABASE test_mgr CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Query OK, 1 row affected (0.34 sec)

mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test_mgr           |
+--------------------+
5 rows in set (0.02 sec)
 

创建一张表

mysql> use test_mgr;
Database changed

mysql> create table bookuser(
    ->     id INT PRIMARY KEY AUTO_INCREMENT, -- id
    ->     username varchar(32),  --
    ->     userphone char(11), --
    ->     userpassword varchar(45)  --
    -> );
Query OK, 0 rows affected (1.60 sec)

mysql> show tables;
+--------------------+
| Tables_in_test_mgr |
+--------------------+
| bookuser           |
| employees          |
+--------------------+
2 rows in set (0.00 sec)
 

 插入数据

insert into test_mgr.bookuser(id,username,userphone,userpassword) values (1,'Jack1','12345678911','good#111');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (2,'Jack2','12345678912','good#113');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (3,'Jack3','12345678913','good#112');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (4,'Jack4','12345678914','good#113');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (5,'Jack5','12345678915','good#144');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (6,'Jack6','12345678916','good#133');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (7,'Jack7','12345678917','good#144');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (8,'Jack8','12345678918','good#145');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (9,'Jack9','12345678919','good#112');
insert into test_mgr.bookuser(id,username,userphone,userpassword) values (10,'Jack10','12345678921','good#1178');

查询数据

mysql> select *from bookuser;
+----+----------+-------------+--------------+
| id | username | userphone   | userpassword |
+----+----------+-------------+--------------+
|  2 | Jack2    | 12345678912 | good#113     |
|  3 | Jack3    | 12345678913 | good#112     |
|  4 | Jack4    | 12345678914 | good#113     |
|  5 | Jack5    | 12345678915 | good#144     |
|  6 | Jack6    | 12345678916 | good#133     |
|  7 | Jack7    | 12345678917 | good#144     |
|  8 | Jack8    | 12345678918 | good#145     |
|  9 | Jack9    | 12345678919 | good#112     |
| 10 | Jack10   | 12345678921 | good#1178    |
+----+----------+-------------+--------------+
9 rows in set (0.00 sec)
 

 我们刚才那个终端还没有关掉，过去测试一下；

在 mysql-mgr-slave01数据库中

显示数据库，可以看到有喔，这可是在主节点那边建的，说明同步过来了

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test_mgr           |
+--------------------+
5 rows in set (0.01 sec)

显示tables 有啊有

mysql> use test_mgr;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+--------------------+
| Tables_in_test_mgr |
+--------------------+
| bookuser           |
| employees          |
+--------------------+
2 rows in set (0.00 sec)

查询数据

 mysql> select *from bookuser;
+----+----------+-------------+--------------+
| id | username | userphone   | userpassword |
+----+----------+-------------+--------------+
|  2 | Jack2    | 12345678912 | good#113     |
|  3 | Jack3    | 12345678913 | good#112     |
|  4 | Jack4    | 12345678914 | good#113     |
|  5 | Jack5    | 12345678915 | good#144     |
|  6 | Jack6    | 12345678916 | good#133     |
|  7 | Jack7    | 12345678917 | good#144     |
|  8 | Jack8    | 12345678918 | good#145     |
|  9 | Jack9    | 12345678919 | good#112     |
| 10 | Jack10   | 12345678921 | good#1178    |
+----+----------+-------------+--------------+
9 rows in set (0.00 sec)

进入slave02中，也是可以的啊

mysql> select *from test_mgr.bookuser;
+----+----------+-------------+--------------+
| id | username | userphone   | userpassword |
+----+----------+-------------+--------------+
|  2 | Jack2    | 12345678912 | good#113     |
|  3 | Jack3    | 12345678913 | good#112     |
|  4 | Jack4    | 12345678914 | good#113     |
|  5 | Jack5    | 12345678915 | good#144     |
|  6 | Jack6    | 12345678916 | good#133     |
|  7 | Jack7    | 12345678917 | good#144     |
|  8 | Jack8    | 12345678918 | good#145     |
|  9 | Jack9    | 12345678919 | good#112     |
| 10 | Jack10   | 12345678921 | good#1178    |
+----+----------+-------------+--------------+
9 rows in set (0.00 sec)
 

那我们集群安装就结束了，祝大家明天五一最后一天开开心心玩。

忘了，外网还没测试呢？用nvicat测试

先开放端口13066   23066   33066

sudo ufw allow 13066
sudo ufw allow 23066
sudo ufw allow 33066
sudo ufw reload

 

看看我们插入的数据还在。 

10、还有个问题没解决

服务器重启后，mysql没启动，得设置下自启动

victor_t400@victort400:~$ docker ps -a
CONTAINER ID   IMAGE          COMMAND                  CREATED       STATUS                          PORTS                                                                                                NAMES
3bba9175355e   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Exited (0) About a minute ago                                                                                                        mysql-mgr-slave02
329c7a28c17c   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Exited (0) About a minute ago                                                                                                        mysql-mgr-slave01
68df336dad9b   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Exited (0) About a minute ago                                                                                                        mysql-mgr-master
 

#注意容器id用自己的
docker start 3bba9175355e
docker update --restart=always 3bba9175355e
docker start 329c7a28c17c
docker update --restart=always 329c7a28c17c
docker start 68df336dad9b
docker update --restart=always 68df336dad9b

 重启后，好了，完工

victor_t400@victort400:~$ docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED       STATUS         PORTS                                                                                                   NAMES
3bba9175355e   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Up 5 minutes   0.0.0.0:33013->33013/tcp, :::33013->33013/tcp, 33060/tcp, 0.0.0.0:33066->3306/tcp, :::33066->3306/tcp   mysql-mgr-slave02
329c7a28c17c   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Up 5 minutes   0.0.0.0:33012->33012/tcp, :::33012->33012/tcp, 33060/tcp, 0.0.0.0:23066->3306/tcp, :::23066->3306/tcp   mysql-mgr-slave01
68df336dad9b   mysql:8.0.20   "docker-entrypoint.s…"   2 hours ago   Up 5 minutes   0.0.0.0:33011->33011/tcp, :::33011->33011/tcp, 33060/tcp, 0.0.0.0:13066->3306/tcp, :::13066->3306/tcp   mysql-mgr-master
 

总结

redis和mysql安装，以前都是现成的，或者别人安装好的，自己装有时候用宝塔，还有些像php的环境，很少自己装，集群更加没装过，这样感谢csdn的朋友们提供的教程，不过也花了我很多时间，版本问题才是最大的问题，很多不一样

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