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【Docker實戰之入門】Dockerfile詳細分析：構建docker鏡像（4）構建動態網站Wor

Labradors / 1466人閱讀

摘要：指定鏡像綁定端口出錯。查看容器顯示，沒有啟動成功。啟動命令網卡信息背景補充構建容器時，使用的端口映射為解決方法改為使用網卡地址，指定端口號。

代碼文件

[root@Optimus /]# cd docker-training/
[root@Optimus docker-training]# ls
centos7  mysql  php-fpm  README.md  wordpress
[root@Optimus docker-training]# cd wordpress/
[root@Optimus wordpress]# ls
Dockerfile  init.sh      readme.html      wp-admin            wp-comments-post.php  wp-content   wp-includes        wp-load.php   wp-mail.php      wp-signup.php     xmlrpc.php
index.php   license.txt  wp-activate.php  wp-blog-header.php  wp-config-sample.php  wp-cron.php  wp-links-opml.php  wp-login.php  wp-settings.php  wp-trackback.php
[root@Optimus wordpress]#

其中，除了dockerfile和init.sh，都是項目代碼文件。推薦把dockerfile放在該目錄下。

查看dockerfile

from csphere/php-fpm:5.4

add init.sh /init.sh

entrypoint ["/init.sh", "/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]

代碼文件已經了，只需要能解析運行PHP的環境和webserver的鏡像。
在/php-fpm/Dockerfile文件中，最后兩行代碼是onbuild，會在構建WordPress的時候生效。添加所有文件到/app目錄下。

ONBUILD ADD . /app
ONBUILD RUN chown -R nginx:nginx /app

文件目錄如下

[root@Optimus wordpress]#  ls
Dockerfile  init.sh      readme.html      wp-admin            wp-comments-post.php  wp-content   wp-includes        wp-load.php   wp-mail.php      wp-signup.php     xmlrpc.php
index.php   license.txt  wp-activate.php  wp-blog-header.php  wp-config-sample.php  wp-cron.php  wp-links-opml.php  wp-login.php  wp-settings.php  wp-trackback.php
[root@Optimus wordpress]#

其中Dockerfile不必要添加到/app目錄下，只要copy其他的代碼文件即可。

查看當前目錄下所有文件

[root@Optimus wordpress]# ls -a
.   Dockerfile     index.php  license.txt  wp-activate.php  wp-blog-header.php    wp-config-sample.php  wp-cron.php  wp-links-opml.php  wp-login.php  wp-settings.php  wp-trackback.php
..  .dockerignore  init.sh    readme.html  wp-admin         wp-comments-post.php  wp-content            wp-includes  wp-load.php        wp-mail.php   wp-signup.php    xmlrpc.php
[root@Optimus wordpress]#

.dockerignore文件內容

[root@Optimus wordpress]# cat .dockerignore 
Dockerfile

只有一句dockerfile，代表著除了dockerfile文件，其他文件都會copy到/app目錄下。

WordPress的dockerfile

[root@Optimus wordpress]# cat Dockerfile 
from csphere/php-fpm:5.4

add init.sh /init.sh

entrypoint ["/init.sh", "/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]
[root@Optimus wordpress]#

from執行完畢后，就會執行onbuild去添加代碼文件到/app，然后才會執行add命令。先添加文件，后執行init.sh腳本。

在執行WordPress entrypoint命令時，先執行init.sh腳本，再啟動supervisor。這里啟動supervisor，相當于啟動了Nginx和php-fpm，因為在php-fpm這個鏡像下，supervisor.conf.d目錄下只有Nginx和php-fpm的啟動文件。

entrypoint ["/init.sh", "/usr/bin/supervisord", "-n", "-c", "/etc/supervisord.conf"]

init.sh腳本

構建WordPress鏡像
dockerfile不在當前目錄下，構建鏡像

[root@Optimus /]# docker build -t csphere/wordpress:4.2 ./docker-training/wordpress/
Sending build context to Docker daemon  19.8 MB
Sending build context to Docker daemon 
Step 0 : FROM csphere/php-fpm:5.4
# Executing 2 build triggers
Trigger 0, ADD . /app
Step 0 : ADD . /app
Trigger 1, RUN chown -R nginx:nginx /app
Step 0 : RUN chown -R nginx:nginx /app
          ---> Running in 5884fc6d3da5
          ---> cac915ee5a8f
Removing intermediate container dc55f73b6381
Removing intermediate container 5884fc6d3da5
Step 1 : ADD init.sh /init.sh
          ---> da14e3eab628
Removing intermediate container e03e077ee0ad
Step 2 : ENTRYPOINT /init.sh /usr/bin/supervisord -n -c /etc/supervisord.conf
          ---> Running in 87d28377c3ea
          ---> 6d90342cc99d
Removing intermediate container 87d28377c3ea
Successfully built 6d90342cc99d
[root@Optimus /]#

查看鏡像

[root@Optimus /]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED              VIRTUAL SIZE
csphere/wordpress   4.2                 6d90342cc99d        About a minute ago   747.3 MB
csphere/mysql       5.5                 e147ac2a588e        3 days ago           752.7 MB
csphere/php-fpm     5.4                 1b08c94ce801        5 days ago           709.7 MB
csphere/centos      7.1                 fd1f7619e63e        6 days ago           613 MB
centos              centos7.1.1503      879c6d07c60e        6 weeks ago          212.1 MB
[root@Optimus /]#

已經有了DB、php-fpm，現在構建一個應用鏡像，并連接DB container。

[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                 COMMAND                CREATED             STATUS                    PORTS                                   NAMES
8e266cd27a63        csphere/mysql:5.5     "/scripts/start"       16 hours ago        Up 16 hours               22/tcp, 0.0.0.0:3307->3306/tcp          newdb               
e274049db704        csphere/php-fpm:5.4   "/usr/bin/supervisor   5 days ago          Up 5 days                 22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp   website             
2d36dbfc72a0        csphere/centos:7.1    "/usr/bin/supervisor   6 days ago          Up 6 days                 0.0.0.0:2222->22/tcp                    base                
0d1f6225836b        centos                "/bin/bash"            7 days ago          Exited (127) 7 days ago                                           naughty_engelbart   
[root@Optimus /]#

查看當前主機的內網網卡的主機地址（服務器的內部IP地址）

[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 /]#

（我的主機在eth0下沒有IP地址，查看其它的網卡eth1）

[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:224369799 errors:0 dropped:0 overruns:0 frame:0
      TX packets:78309983 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:42464926703 (39.5 GiB)  TX bytes:107190159141 (99.8 GiB)
      Memory:d0940000-d095ffff

運行docker WordPress

docker run -d -p 80:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2
-e 可以傳入環境變量給container。在inut,sh文件中有三個參數需要傳給container。
WORDPRESS_DB_HOST=連哪臺數據庫。
端口映射為3306端口不需要改。
-e可以使用多次。-p可以使用多次。-d不可以使用多次。
WORDPRESS_DB_USER=admin
WOREDPRESS_DB_PASSWORD=csphere2015
指定鏡像 csphere/wordpress:4.2

綁定80端口出錯。想重新端口映射，名字沖突。刪除container，重新端口映射，8080和8000均不成功。最后用9090做端口映射。

[root@Optimus /]# docker run -d -p 80:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2 
f0bf3b9ecdf026b06bd79cdcf364354eab8760a7d2ee5fdd5fb715f997a7a649
Error response from daemon: Cannot start container f0bf3b9ecdf026b06bd79cdcf364354eab8760a7d2ee5fdd5fb715f997a7a649: Error starting userland proxy: listen tcp 0.0.0.0:80: bind: address already in use
[root@Optimus /]# docker run -d -p 8080:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2 
Error response from daemon: Conflict. The name "wordpress" is already in use by container f0bf3b9ecdf0. You have to delete (or rename) that container to be able to reuse that name.
[root@Optimus /]# docker rm wordpress
wordpress
[root@Optimus /]# docker run -d -p 8080:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2 
2a9942d2ce32aa673d14563378d18b53970ede65b6599cb9880fe6d86010cc77
Error response from daemon: Cannot start container 2a9942d2ce32aa673d14563378d18b53970ede65b6599cb9880fe6d86010cc77: Bind for 0.0.0.0:8080 failed: port is already allocated
[root@Optimus /]# docker rm wordpress
wordpress
[root@Optimus /]# docker run -d -p 8000:80 --name wordpress -e WORDPRESS_DB_HOST=10.10.4.182 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2 
85c51e130edc625c9c77040a8ba0c1f4dfcdbf419daec74f97cb3d9a385202f7
Error response from daemon: Cannot start container 85c51e130edc625c9c77040a8ba0c1f4dfcdbf419daec74f97cb3d9a385202f7: Error starting userland proxy: listen tcp 0.0.0.0:8000: bind: address already in use
[root@Optimus /]# docker rm wordpress
wordpress
[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 
18e21a1d127f1f99f12d67a67ee8a26391f992d7e93fbd2c78d45235c475e74a
[root@Optimus /]#

查看容器

[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                   COMMAND                CREATED             STATUS                     PORTS                                   NAMES
18e21a1d127f        csphere/wordpress:4.2   "/init.sh /usr/bin/s   5 minutes ago       Exited (1) 4 minutes 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

顯示exited，沒有啟動成功。刪除WordPress，重啟，查看容器，啟動成功。

[root@Optimus /]# docker rm wordpress
wordpress
[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                 COMMAND                CREATED             STATUS                    PORTS                                   NAMES
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   
[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 
fcf40517154261e3b7768272d1c856df63f5703455ccd229d22ba57ab9656163
[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                   COMMAND                CREATED             STATUS                    PORTS                                   NAMES
fcf405171542        csphere/wordpress:4.2   "/init.sh /usr/bin/s   3 seconds ago       Up 2 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   
[root@Optimus /]#

使用80端口做映射，訪問的時候可以不用加端口號訪問。否則要加上端口號。
出錯：成功啟動過了幾分鐘，發現，又excited了。。

[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                   COMMAND                CREATED             STATUS                     PORTS                                   NAMES
fcf405171542        csphere/wordpress:4.2   "/init.sh /usr/bin/s   2 minutes ago       Exited (1) 2 minutes 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   
[root@Optimus /]#

訪問失敗

查看出錯日志

[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]#

有人建議我，臨時進入docker連接數據庫，運行如下：

root@Optimus ~]# docker run -it wordpress bash
Unable to find image "wordpress:latest" locally
latest: Pulling from wordpress

632d62e9ff45: Pulling fs layer 
2309d29c605a: Pull complete 
b5c24cf2be08: Pull complete 
4b0489c8c5ad: Pull complete 
0e18f8fbae80: Pull complete 
ae8ee28d33fd: Pull complete 
4e6bd1f11ffa: Pull complete 
b150aee2f63a: Pull complete 
bda04964adbb: Pull complete 
765636a32409: Pull complete 
9f39310817a4: Pull complete 
d5965880f205: Pull complete 
bc291240dd82: Pull complete 
ed3c4a2166ea: Pull complete 
7f9f8040b904: Pull complete 
30d2ca86be32: Pull complete 
9796545de9ab: Pull complete 
96f8917e11d8: Pull complete 
b3aebdc4c86d: Pull complete 
dfc5c74517f4: Pull complete 
b74ab8ff8171: Pull complete 
f8f5b923aa4a: Pull complete 
d336bb27db75: Pull complete 
76d91343f4f9: Pull complete 
640a07199820: Pull complete 
5fb5a73259de: Pull complete 
1ff113204b89: Pull complete 
f0d30083f45e: Pull complete 
95cf8f007a47: Pull complete 
e54ef1de6066: Pull complete 
4c985e73a00d: Pull complete 
2b1f410ae0f1: Pull complete 
f6e007144096: Pull complete 
86b573b7bc9b: Pull complete 
a1c0c746f816: Pull complete 
df87483bb3b4: Pull complete 
906569adf667: Pull complete 
5bdd010bcd76: Pull complete 
c9986e430552: Pull complete 
b027afd30886: Pull complete 
Digest: sha256:b277723a281b94d5d28058b346361704f84caa681ff45ccf89f68bf3ba96e788
Status: Downloaded newer image for wordpress:latest

root@de644e92ee52:/var/www/html#

shell命令沒有指定鏡像，系統找不到最新版本的WordPress鏡像，pull了一個新的WordPress鏡像，構建了容器，然后進入了這個容器。好像不對。
刪除這個容器：

[root@Optimus ~]# docker ps -a
CONTAINER ID        IMAGE                 COMMAND                CREATED             STATUS                      PORTS                                   NAMES
de644e92ee52        wordpress             "docker-entrypoint.s   8 minutes ago       Exited (0) 37 seconds ago                                           mad_hodgkin         
8e266cd27a63        csphere/mysql:5.5     "/scripts/start"       45 hours ago        Up 45 hours                 22/tcp, 0.0.0.0:3307->3306/tcp          newdb               
e274049db704        csphere/php-fpm:5.4   "/usr/bin/supervisor   7 days ago          Up 7 days                   22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp   website             
2d36dbfc72a0        csphere/centos:7.1    "/usr/bin/supervisor   8 days ago          Up 8 days                   0.0.0.0:2222->22/tcp                    base                
0d1f6225836b        centos                "/bin/bash"            9 days ago          Exited (127) 9 days ago                                             naughty_engelbart   
[root@Optimus ~]# docker rm mad_hodgkin
mad_hodgkin
[root@Optimus ~]#

查看數據庫用戶

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

網卡信息

[root@Optimus centos7]# 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:98676 errors:0 dropped:0 overruns:0 frame:0
      TX packets:148581 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:4576610 (4.3 MiB)  TX bytes:222704957 (212.3 MiB)

使用IP地址172.17.42.1構建容器

[root@Optimus /]# docker run -d -p 9090:80 --name wordpress -e WORDPRESS_DB_HOST=172.17.42.1 -e WORDPRESS_DB_USER=admin -e WORDPRESS_DB_PASSWORD=csphere2015 csphere/wordpress:4.2
6a1942015dd23bbf6252f1a4836ada09ffb40a6e8f815480b22e31ab1f2847ed
[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                   COMMAND                CREATED             STATUS                    PORTS                                   NAMES
6a1942015dd2        csphere/wordpress:4.2   "/init.sh /usr/bin/s   6 seconds ago       Up 3 seconds              22/tcp, 443/tcp, 0.0.0.0:9090->80/tcp   wordpress           
8e266cd27a63        csphere/mysql:5.5       "/scripts/start"       47 hours ago        Up 47 hours               22/tcp, 0.0.0.0:3307->3306/tcp          newdb               
e274049db704        csphere/php-fpm:5.4     "/usr/bin/supervisor   7 days ago          Up 7 days                 22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp   website             
2d36dbfc72a0        csphere/centos:7.1      "/usr/bin/supervisor   8 days ago          Up 8 days                 0.0.0.0:2222->22/tcp                    base                
0d1f6225836b        centos                  "/bin/bash"            9 days ago          Exited (127) 9 days ago                                           naughty_engelbart   
[root@Optimus /]#

訪問172.17.42.1:9090失敗。

再次查看容器

[root@Optimus /]# docker ps -a
CONTAINER ID        IMAGE                   COMMAND                CREATED             STATUS                          PORTS                                   NAMES
6a1942015dd2        csphere/wordpress:4.2   "/init.sh /usr/bin/s   2 minutes ago       Exited (1) About a minute ago                                           wordpress           
8e266cd27a63        csphere/mysql:5.5       "/scripts/start"       47 hours ago        Up 47 hours                     22/tcp, 0.0.0.0:3307->3306/tcp          newdb               
e274049db704        csphere/php-fpm:5.4     "/usr/bin/supervisor   7 days ago          Up 7 days                       22/tcp, 443/tcp, 0.0.0.0:8080->80/tcp   website             
2d36dbfc72a0        csphere/centos:7.1      "/usr/bin/supervisor   8 days ago          Up 8 days                       0.0.0.0:2222->22/tcp                    base                
0d1f6225836b        centos                  "/bin/bash"            9 days ago          Exited (127) 9 days ago                                                 naughty_engelbart   
[root@Optimus /]#

查看日志

[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"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
PHP Warning:  mysqli::mysqli(): (28000/1045): Access denied for user "admin"@"172.17.0.28" (using password: YES) in - on line 7

MySQL Connection Error: (1045) Access denied for user "admin"@"172.17.0.28" (using password: YES)
[root@Optimus /]#
問題描述

通過docker run啟動一個 WordPress 應用的 docker 容器時，顯示啟動成功為UP狀態，但無法訪問
WordPress 應用，并且幾分鐘后 container 的狀態變為excited。

啟動命令

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

網卡信息

    [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

背景補充

構建DB容器時，使用的端口映射為3307:3306.
解決方法

改為使用docker0網卡地址172.17.42.1，指定3307端口號。網頁訪問地址為eth1:9090,也就是10.10.4.182:9090.訪問成功！

[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

成功。

配置WordPress時，如果沒有配置數據庫以及數據庫用戶和密碼時，在第一頁需要填寫連接哪個數據庫、數據庫服務器是哪臺IP地址或者域名。這里已經設置好了，所以不需要再填寫。

選擇簡體中文，點擊繼續.
用戶名：admin
密碼：admin

安裝完成

登錄

登錄成功

訪問WordPress主頁

基礎環境鏡像+中間件鏡像+WordPress的應用鏡像
其中WordPress可以是自己的應用程序。

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