Docker:无法连接容器中的mysql

Question

• 环境

  • Macbook pro 10.10

  • DockerToolbox 1.8 & Docker 1.8.2

• 先看一下错误输出吧

$ mysql -uroot -p -h192.168.99.100 -P3306        
Enter password: 
ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.99.100' (61)

$ mysqladmin -h192.168.99.100 --port=3306 version                                                                                                                                                      127 ↵
mysqladmin: connect to server at '192.168.99.100' failed
error: 'Can't connect to MySQL server on '192.168.99.100' (61)'
Check that mysqld is running on 192.168.99.100 and that the port is 3306.
You can check this by doing 'telnet 192.168.99.100 3306'

DEBUG的过程

• 容器状态&端口映射

$ docker ps -l 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
b20584bc086e        sunzy/mysql         "/usr/bin/mysqld_safe"   21 minutes ago      Up 21 minutes       0.0.0.0:3306->3306/tcp   mysql

• 宿主机的IP

$ docker-machine ls
NAME      ACTIVE   DRIVER       STATE     URL                         SWARM
default   *        virtualbox   Running   tcp://192.168.99.100:2376   
$ docker-machine ls
NAME      ACTIVE   DRIVER       STATE     URL                         SWARM
default   *        virtualbox   Running   tcp://192.168.99.100:2376   

• PING

$ ping 192.168.99.100                                                                                                                                                                                    1 ↵
PING 192.168.99.100 (192.168.99.100): 56 data bytes
64 bytes from 192.168.99.100: icmp_seq=0 ttl=64 time=0.347 ms
64 bytes from 192.168.99.100: icmp_seq=1 ttl=64 time=0.388 ms
64 bytes from 192.168.99.100: icmp_seq=2 ttl=64 time=0.272 ms

• Telnet

$ telnet 192.168.99.100 3306                                                                                                                                                                             1 ↵
Trying 192.168.99.100...
telnet: connect to address 192.168.99.100: Connection refused
telnet: Unable to connect to remote host

• 在容器内连接

# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.5.44-0ubuntu0.14.04.1 (Ubuntu)

Copyright (c) 2000, 2015, 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.

mysql> 
mysql> 

• mysql允许任意IP连接

mysql> select user,host,password from mysql.user;
+------------------+--------------+-------------------------------------------+
| user             | host         | password                                  |
+------------------+--------------+-------------------------------------------+
| root             | localhost    | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root             | e611e15f9c9d | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root             | 127.0.0.1    | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root             | ::1          |                                           |
| debian-sys-maint | localhost    | *1BD91232C0D2D2B5500129217CEF09B7EE71ABEC |
| root             | %            | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+------------------+--------------+-------------------------------------------+

Answer 1

갑자기 vagrant를 사용하기 전에 이런 상황을 겪었던 기억이 나네요. 그런데 신고 내용은 2013-초기 통신 패킷을 읽는 중 MySQL 서버 연결이 끊어졌습니다오류=>

1. mysql 구성 파일 열기

   sudo vim /etc/mysql/my.cnf

2. bind-address를 찾아 127.0.0.1을 0.0.0.0으로 변경하거나

   행을 주석 처리하세요.
3. mysql 다시 시작

해봤는데 잘 되더라구요

Answer 2

호스트의 방화벽이 켜져 있나요? sudo 서비스 iptables 상태를 확인하세요.

호스트 시스템에서 sudo netstat -lnp | grep 3306을 실행하여 어떤 프로세스가 포트 3306을 사용하고 있는지 확인하세요.

Answer 3

으아악

连接到该 MySQL 服务

으아악

관련 로그

으아악