docker深入1-尝试运行一个简单的web环境
docker深入1-尝试运行一个简单的web环境目的：在基础镜像（pcnk/base:v2）上增加一个web环境：sync
做法：启动新的container，然后逐步增加web服务，再提交到image，这里用到了端口映射，数据卷挂载。
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一、在【pcnk/base:v2】这个基础image上运行一个container【web】来安装sync所需的httpd等服务
1）container【web】
$ docker run -d -v /home/download:/home/download -v /home/datacenter:/data --name web -p 10032:22 pcnk/base:v2
152d0ca20346fc4a0d0a5a8fe04671910dcc685801f572159ae3c7f5dd2ecf43
$ docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
152d0ca20346 pcnk/base:v2 "/usr/bin/supervisor 7 seconds ago Up 6 seconds 0.0.0.0:10032->22/tcp web
$ ssh -p 10032 root@127.0.0.1
root@127.0.0.1's password:
Last login: Wed May6 10:11:26 2015 from 172.17.42.1
2）调整时间：
# mv -f /etc/localtime /etc/localtime.old
# ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
# echo 'ZONE="Asia/Shanghai"' >/etc/sysconfig/clock
# cd /home/download/vriteam-sync-0.2.4
# yum -y install wget gcc perl autoconf automake make bzip2 tar zip && yum clean all
# ./install all
3）安装php模块：
# ./install ssh2
# ./install svn
# cd /etc/php.d
# cat ssh2.ini svn.ini
; Enable ssh2 extension module
extension=ssh2.so
; Enable svn extension module
extension=svn.so
# ls /lib64/php/modules/
curl.sofileinfo.sojson.somysqli.somysql.sopdo_mysql.sopdo.sopdo_sqlite.sophar.sosqlite3.sossh2.sosvn.sozip.so
# yum clean all
4）调整httpd的配置：
# ln -s /data/supervisor.d/httpd.ini .
# ll
total 4
lrwxrwxrwx. 1 root root 28 May6 02:46 httpd.ini -> /data/supervisor.d/httpd.ini
-rw-rw-r--. 1 root root 41 May5 10:47 sshd.ini
# cd /etc/httpd/conf.d/
# mv welcome.conf /tmp/
# ln -s /data/httpd/conf.d/sync.conf .
# ll
total 16
-rw-r--r--. 1 root root 2893 Mar 12 15:07 autoindex.conf
-rw-r--r--. 1 root root691 Oct 312014 php.conf
-rw-r--r--. 1 root root366 Mar 12 15:08 README
lrwxrwxrwx. 1 root root 28 May6 02:47 sync.conf -> /data/httpd/conf.d/sync.conf
-rw-r--r--. 1 root root 1252 Mar 12 14:57 userdir.conf
# cat sync.conf
<VirtualHost *:80>
ServerAdmin pc@ec.office
ServerName sync.ec.office
DocumentRoot /data/sync/src
DirectoryIndex index.html index.php
<Directory /data/sync/src>
AllowOverride None
Require all granted
</Directory>
ErrorLog /data/log/sync-error_log
CustomLog /data/log/sync-access_log common
</VirtualHost>
二、提交成image：【pcnk/web:sync】
$ docker commit 152d0ca20346 pcnk/web:sync
三、在image【pcnk/web:sync】的基础上，创建新的container【app_sync】，映射80端口，启动httpd服务
1）container【app_sync】
$ docker run -d -v /home/download:/home/download -v /home/datacenter:/data --name app_sync -p 10042:22 -p 80:80 pcnk/web:sync
$ ssh -p 10042 root@127.0.0.1
The authenticity of host ':10042 (:10042)' can't be established.
RSA key fingerprint is 15:18:db:44:ed:03:ca:ac:15:a3:d0:ea:ac:01:7e:27.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ':10042' (RSA) to the list of known hosts.
root@127.0.0.1's password:
Last login: Wed May6 11:51:55 2015 from 172.17.42.1
# ps -ef
UID PIDPPIDC STIME TTY TIME CMD
root 1 00 12:02 ? 00:00:00 /usr/bin/python /usr/bin/supervisord
root 9 10 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
root 10 10 12:02 ? 00:00:00 /usr/sbin/sshd -D
apache 12 90 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 13 90 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 14 90 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 15 90 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 16 90 12:02 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
root 17 100 12:03 ? 00:00:00 sshd: root@pts/0
root 19 170 12:03 pts/0 00:00:00 -bash
root 36 190 12:03 pts/0 00:00:00 ps -ef
2）httpd服务的控制
# supervisorctl status httpd
httpd RUNNING pid 9, uptime 0:00:48
# chmod 777 /data/sync/src/tmp/
# chmod 777 /data/sync/src/data/
# chmod 777 /data/sync/src/install/
# chmod 777 /data/sync/src/db.cfg.php
3）通过web访问，引导安装，db这个环节略过。
四、停止之前用的container，删掉image【pcnk/web:sync】，提交成一个新的image【website/sync】，然后通过这个来启动服务
1）image【website/sync】
$ docker stop app_sync
$ docker rm app_sync
$ dcoker rmi
$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
website/sync latest 1bda5d872bf7 22 minutes ago 508 MB
pcnk/web sync b41b76b51e1a 4 hours ago 505.9 MB
pcnk/base v2 064aa35dfcef 6 hours ago 251.3 MB
centos 7 fd44297e2ddb 2 weeks ago 215.7 MB
centos centos7 fd44297e2ddb 2 weeks ago 215.7 MB
centos latest fd44297e2ddb 2 weeks ago 215.7 MB
$ docker rmi b41b76b51e1a
Untagged: pcnk/web:sync
$ docker commit -m "增加 httpd,php 服务，用于sync这个应用。" -a "pcnk" ea8daf7b62d4 website/sync
2）container【app_sync_web】
$ docker run -d -v /home/download:/home/download -v /home/datacenter:/data --name app_sync_web -p 40022:22 -p 80:80 website/sync
$ docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2ab2a9866251 website/sync:latest "/usr/bin/supervisor 6 seconds ago Up 4 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:40022->22/tcp app_sync_web
五、现在我们来看一下images之间的关联
$ docker images --tree
Warning: '--tree' is deprecated, it will be removed soon. See usage.
└─6941bfcbbfca Virtual Size: 0 B
└─41459f052977 Virtual Size: 215.7 MB
└─fd44297e2ddb Virtual Size: 215.7 MB Tags: centos:centos7, centos:latest, centos:7
└─751a85a0d00b Virtual Size: 215.7 MB
└─19b009f08542 Virtual Size: 228.1 MB
└─420cb9e73c70 Virtual Size: 251.3 MB
└─e97f94a79de0 Virtual Size: 251.3 MB
└─fde06c761bde Virtual Size: 251.3 MB
└─dbfae1099999 Virtual Size: 251.3 MB
└─064aa35dfcef Virtual Size: 251.3 MB Tags: pcnk/base:v2
└─b41b76b51e1a Virtual Size: 505.9 MB
└─1bda5d872bf7 Virtual Size: 508 MB Tags: website/sync:latest
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