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为什么docker容器启动成功几分钟后又自己关闭了？

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afra
    2252917

    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

        [root@Optimus /]# ifconfig
    docker0   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！

    [root@Optimus /]# 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:4.2
6472364a37f5db3cee78608a649b0a9772952343914212fa8125faa0bcdc4152

    clipboard.png

    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）

    [root@Optimus wordpress]# docker logs -f  wordpress
PHP 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)
[root@Optimus 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)

    [root@Optimus ~]# docker logs -f  wordpress
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 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)
[root@Optimus ~]#

    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：

    1. 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。
    
[root@Optimus ~]# 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 

    [root@Optimus ~]# ifconfig eth1
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: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

    [root@Optimus /]# 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 
a6aae74c483a9d662594695dc420d183bdb0ad52fdc844783456d40a22e5114a

    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

    [root@Optimus /]# docker ps -a
CONTAINER 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。

    clipboard.png

    查看容器状态

    此时，再次查看容器，已经关闭了，状态为excited

    [root@Optimus /]# docker ps -a
CONTAINER 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：

    1. 构建WordPress镜像的详细过程
    2. 构建DB镜像的详细过程
    3. 构建php-fpm镜像的详细过程
    mysqldocker
    阅读 9.9k
    2 个回答
    得票最新
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    CrazyCodes
      16.9k1842
      ✓ 已被采纳
      docker logs 容器id

      自己动手、丰衣足食，logs下把错误信息贴出来

      头像
      Feng_Yu
        12.6k62139

        看看log，肯定出错挂掉了了

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