【Docker】为什么docker容器启动成功几分钟后又自己关闭了？
总结
问题描述
通过docker run启动一个 WordPress 应用的 docker 容器时，显示启动成功为UP状态，但无法访问
WordPress 应用，并且几分钟后 container 的状态变为excited。
启动命令
docker run -d -p 9090:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2网卡信息
[[email protected] /]# ifconfigdocker0 Link encap:Ethernet HWaddr 02:C4:0F:42:9D:A4
inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::ac31:7eff:fe21:61bb/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:99200 errors:0 dropped:0 overruns:0 frame:0
TX packets:149257 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5452754 (5.2 MiB) TX bytes:222793983 (212.4 MiB)
eth0 Link encap:Ethernet HWaddr 00:1E:67:4E:3D:7B
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Memory:d0960000-d097ffff
eth1 Link encap:Ethernet HWaddr 00:1E:67:4E:3D:7C
inet addr:10.10.4.182 Bcast:10.10.4.255 Mask:255.255.255.0
inet6 addr: fe80::21e:67ff:fe4e:3d7c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:225323670 errors:0 dropped:0 overruns:0 frame:0
TX packets:78415571 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:42781224797 (39.8 GiB) TX bytes:107201976978 (99.8 GiB)
Memory:d0940000-d095ffff
背景补充
构建DB容器时，使用的端口映射为3307:3306.解决方法
改为使用docker0网卡地址172.17.42.1，指定3307端口号。网页访问地址为eth1:9090,也就是10.10.4.182:9090.访问成功！
[[email protected] /]# docker run -d -p 9090:80 --name wordpress -e WORDPRESS_DB_HOST=172.17.42.1:3307 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.26472364a37f5db3cee78608a649b0a9772952343914212fa8125faa0bcdc4152
感谢@CrazyCodes和@Feng_Yu两位的帮助！
原问题
补充信息
出错信息1（第一次docker run的日志显示的是admin'@'172.17.0.22）
[[email protected] wordpress]# docker logs -f wordpressPHP Notice: Undefined offset: 1 in - on line 4
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.22' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.22' (using password: YES)
[[email protected] wordpress]#
错误信息2(删除容器，再重新docker run，显示的错误信息变成了admin'@'172.17.0.25)
[[email protected] ~]# docker logs -f wordpressPHP Notice: Undefined offset: 1 in - on line 4
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Notice: Undefined offset: 1 in - on line 4
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
PHP Warning: mysqli::mysqli(): (28000/1045): Access denied for user 'admin'@'172.17.0.25' (using password: YES) in - on line 7
MySQL Connection Error: (1045) Access denied for user 'admin'@'172.17.0.25' (using password: YES)
[[email protected] ~]#
改用docker0网卡的IP地址172.17.42.1仍然不行。
查看数据库用户信息如下
查看数据库用户
MariaDB [(none)]> select * from mysql.user;| Host | User | Password | Select_priv | Insert_priv | Update_priv | Delete_priv | Create_priv | Drop_priv | Reload_priv | Shutdown_priv | Process_priv | File_priv | Grant_priv | References_priv | Index_priv | Alter_priv | Show_db_priv | Super_priv | Create_tmp_table_priv | Lock_tables_priv | Execute_priv | Repl_slave_priv | Repl_client_priv | Create_view_priv | Show_view_priv | Create_routine_priv | Alter_routine_priv | Create_user_priv | Event_priv | Trigger_priv | Create_tablespace_priv | ssl_type | ssl_cipher | x509_issuer | x509_subject | max_questions | max_updates | max_connections | max_user_connections | plugin | authentication_string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| localhost | root | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 0 | 0 | |||||||
| 9ad32fb968fe | root | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 0 | 0 | |||||||
| 127.0.0.1 | root | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 0 | 0 | |||||||
| ::1 | root | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 0 | 0 | |||||||
| localhost | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | 0 | 0 | 0 | 0 | ||||||||
| 9ad32fb968fe | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | 0 | 0 | 0 | 0 | ||||||||
| % | admin | *318BF8C339F1F04B052E3D1ED22C2B5873740C5A | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 0 | 0 | ||||||
| localhost | admin | *318BF8C339F1F04B052E3D1ED22C2B5873740C5A | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | 0 | 0 | 0 | 0 | ||||||
| 127.0.0.1 | admin | *318BF8C339F1F04B052E3D1ED22C2B5873740C5A | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | 0 | 0 | 0 | 0 |
构建镜像过程
构建过程中的几个小问题：
- 使用的
WORDPRESS_DB_HOST地址是eth1网卡的地址。原本应该用eth0网卡的地址，但是ifconfig eth0显示没有IP地址。我就拿eth1网卡代替了。
[[email protected] ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:1E:67:4E:3D:7B
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Memory:d0960000-d097ffff
[[email protected] ~]# ifconfig eth1eth1 Link encap:Ethernet HWaddr 00:1E:67:4E:3D:7C
inet addr:10.10.4.182 Bcast:10.10.4.255 Mask:255.255.255.0
inet6 addr: fe80::21e:67ff:fe4e:3d7c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:225279050 errors:0 dropped:0 overruns:0 frame:0
TX packets:78413400 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:42774258179 (39.8 GiB) TX bytes:107200782231 (99.8 GiB)
Memory:d0940000-d095ffff
2. 构建DB容器 docker run的时候，使用的是3307:3306做端口映射。本应该用3306:3306作为端口映射，但是由于3306端口被占用，所以我自己用了3307做了替换。
启动docker容器
[[email protected] /]# docker run -d -p 9090:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2a6aae74c483a9d662594695dc420d183bdb0ad52fdc844783456d40a22e5114a
这里启动一个WordPress的docker容器，端口映射为9090，因为80端口已经占用了。
容器名为WordPress，宿主机地址是eth1的网卡地址10.10.4.182。(这里原本要用内网网卡eth0的IP地址，但是ifconfig eth0 显示没有IP地址，我换成了eth1的IP地址)
三个环境变量WORDPRESS_DB_HOST、WORDPRESS_DB_USER、WORDPRESS_DB_PASSWORD在脚本init.sh中定义。
使用的是csphere/wordpress:4.2 这个镜像。
查看docker容器
查看docker容器状态，是UP状态，启动成功
[[email protected] /]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a6aae74c483a csphere/wordpress:4.2 "/init.sh /usr/bin/s 5 seconds ago Up 4 seconds 22/tcp, 443/tcp, 0.0.0.0:9090->80/tcp wordpress
8e266cd27a63 csphere/mysql:5.5 "/scripts/start" 23 hours ago Up 23 hours 22/tcp, 0.0.0.0:3307->3306/tcp newdb
e274049db704 csphere/php-fpm:5.4 "/usr/bin/supervisor 6 days ago Up 6 days 22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp website
2d36dbfc72a0 csphere/centos:7.1 "/usr/bin/supervisor 7 days ago Up 7 days 0.0.0.0:2222->22/tcp base
0d1f6225836b centos "/bin/bash" 8 days ago Exited (127) 8 days ago naughty_engelbart
说明：这里使用的DB容器端口映射使用的3307端口，因为3306端口本地已经被占用了。
访问应用
访问页面的时候，出错。
查看容器状态
此时，再次查看容器，已经关闭了，状态为excited
[[email protected] /]# docker ps -aCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a6aae74c483a csphere/wordpress:4.2 "/init.sh /usr/bin/s About a minute ago Exited (1) About a minute ago wordpress
8e266cd27a63 csphere/mysql:5.5 "/scripts/start" 23 hours ago Up 23 hours 22/tcp, 0.0.0.0:3307->3306/tcp newdb
e274049db704 csphere/php-fpm:5.4 "/usr/bin/supervisor 6 days ago Up 6 days 22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp website
2d36dbfc72a0 csphere/centos:7.1 "/usr/bin/supervisor 7 days ago Up 7 days 0.0.0.0:2222->22/tcp base
0d1f6225836b centos "/bin/bash" 8 days ago Exited (127) 8 days ago naughty_engelbart
删除WordPress容器，用同样的方法再重新启动，还是同样的问题：显示启动成功UP状态后，再次查看又变成excited状态，无法访问网页应用。
下面是一些操作过程中的步骤：
- 构建WordPress镜像的详细过程
- 构建DB镜像的详细过程
- 构建php-fpm镜像的详细过程
回答
docker logs 容器id自己动手、丰衣足食，logs下把错误信息贴出来
看看log，肯定出错挂掉了了
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