启动在VMware中的Docker中的mysql

1. start VMware, then startup the centos kuber OS

2. use ssh tool connect to centos kuber os as root, and check iptables port, restart iptables if needed

iptables -L -n
v：显示详细信息，包括每条规则的匹配包数量和匹配字节数
x：在 v 的基础上，禁止自动单位换算（K、M）
n：只显示IP地址和端口号，不将ip解析为域名

  systemctl start iptables.service
  systemctl status iptables.service
  systemctl stop iptables.service

3. check and start mysql container

[root@localhost ~]# docker ps
CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS                                              NAMES
e39d8a6d7ec1        docker.io/mysql:5.7   "docker-entrypoint..."   10 days ago         Up 22 minutes       0.0.0.0:3307->3306/tcp, 0.0.0.0:32768->33060/tcp   sad_einstein
[root@localhost ~]# docker start e39d8a6d7ec1

4. once mysql container startup, login to Docker mysql image from centos kuber OS(local pc)

[root@localhost ~]# docker exec -it sad_einstein bash
root@e39d8a6d7ec1:/#

5. check and start mysql 

[root@localhost ~]# docker exec -it sad_einstein bash
root@e39d8a6d7ec1:/# service mysql status
[info] MySQL Community Server 5.7.29 is not running.


root@e39d8a6d7ec1:/# service mysql start
...
[info] MySQL Community Server 5.7.29 is started.


root@e39d8a6d7ec1:/# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29 MySQL Community Server (GPL)


mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |

6. make sure the firewall policy is active(run these cmd IN centos kuber OS, NOT in docker mysql image)

systemctl status iptables.service

7. use windows mysql tool to connect to db