docker初探

首先安裝環境的準備，docker好像不支持32位的系統。（本人實驗得出的結果7.0系統的安裝包不一樣於6.X的）

我安裝的是CentOS6.6的虛擬機

首先配置擴展源epel

#cd  /etc/yum.repos.d/

#wget  http://mirrors.aliyun.com/repo/epel-6.repo

#yum  clean all

#yum makecache

#yum  search  docker-io

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

 * base: mirrors.aliyun.com

 * epel: mirrors.aliyun.com

 * extras: mirrors.aliyun.com

 * updates: mirrors.aliyun.com

base                                                     | 3.7 kB     00:00     

epel                                                     | 4.4 kB     00:00     

extras                                                   | 3.4 kB     00:00     

updates                                                  | 3.4 kB     00:00     

============================ N/S Matched: docker-io ============================

docker-io.x86_64 : Automates deployment of containerized applications

docker-io-devel.x86_64 : A golang registry for global request variables (source

                       : libraries)

docker-io-fish-completion.x86_64 : fish completion files for docker

docker-io-logrotate.x86_64 : cron job to run logrotate on docker containers

docker-io-pkg-devel.x86_64 : A golang registry for global request variables

                           : (source libraries)

docker-io-vim.x86_64 : vim syntax highlighting files for docker

docker-io-zsh-completion.x86_64 : zsh completion files for docker

  Name and summary matches only, use "search all" for everything.

#yum install -y docker-io

Starting cgconfig service:                                 [  OK  ]

Starting docker:                                           [  OK  ]

#service iptables stop

iptables: Setting chains to policy ACCEPT: filter nat      [  OK  ]

iptables: Flushing firewall rules:                         [  OK  ]

iptables: Unloading modules:                               [  OK  ]

# docker search centos

NAME                                DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED

centos                              The official build of CentOS.                   886       [OK]       

ansible/centos7-ansible             Ansible on Centos7                              35                   [OK]

tutum/centos                        Centos p_w_picpath with SSH access. For the root...   13                   [OK]

jdeathe/centos-ssh-apache-php       CentOS-6 6.5 x86_64 / Apache / PHP / PHP m...   9                    [OK]

blalor/centos                       Bare-bones base CentOS 6.5 p_w_picpath                9                    [OK]

jprjr/centos-php-fpm                                                                6                    [OK]

steeef/graphite-centos              CentOS 6.x with Graphite and Carbon via ng...   6                    [OK]

tutum/centos-6.4                    DEPRECATED. Use tutum/centos:6.4 instead. ...   5                    [OK]

million12/centos-supervisor         Base CentOS-7 with supervisord launcher, h...   2                    [OK]

layerworx/centos                    A general CentOS 6 p_w_picpath with the EPEL6 an...   2                    [OK]

nimmis/java-centos                  This is docker p_w_picpaths of CentOS 7 with dif...   1                    [OK]

jdeathe/centos-ssh                  CentOS-6 6.5 x86_64 / EPEL Repo. / OpenSSH...   1                    [OK]

jdeathe/centos-ssh-mysql            CentOS-6 6.5 x86_64 / MySQL. Image include...   1                    [OK]

internavenue/centos-percona         Centos-based Percona p_w_picpath.                     1                    [OK]

tcnksm/centos-node                  Dockerfile for CentOS packaging node            1                    [OK]

yajo/centos-epel                    CentOS with EPEL and fully updated              1                    [OK]

jr42/chef-solo-centos               Official CentOS base p_w_picpaths with current c...   1                    [OK]

feduxorg/centos-rails                                                               0                    [OK]

akroh/centos                        Centos 6 container that has been updated w...   0                    [OK]

snowyday/centos                     Provide for emacs and Ricty font on X11 en...   0                    [OK]

dmglab/centos                       CentOS with superpowers!                        0                    [OK]

m0ikz/centos                                                                        0                    [OK]

lighthopper/openjdk-centos          A Dockerfile for creating an OpenJDK p_w_picpath...   0                    [OK]

solict/provisionous-puppet-centos   CentOS provisions with Puppet included          0                    [OK]

insaneworks/centos                  CentOS 6.5 x86_64 + @update                     0                    [OK]

#docker pull  jdeathe/centos-ssh-mysql  //下載docker鏡像名爲jdeathe/centos-ssh-mysql

Pulling repository jdeathe/centos-ssh-mysql

8f3141d0a29c: Pulling dependent layers 

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Status: Downloaded newer p_w_picpath for jdeathe/centos-ssh-mysql:latest

#docker run -i  -t jdeathe/centos-ssh-mysql  bash  //交互式登陸docker

bash: warning: setlocale: LC_CTYPE: cannot change locale (en_US.UTF-8): No such file or directory

bash: warning: setlocale: LC_COLLATE: cannot change locale (en_US.UTF-8): No such file or directory

bash: warning: setlocale: LC_MESSAGES: cannot change locale (en_US.UTF-8): No such file or directory

bash: warning: setlocale: LC_NUMERIC: cannot change locale (en_US.UTF-8): No such file or directory

bash: warning: setlocale: LC_TIME: cannot change locale (en_US.UTF-8): No such file or directory

[root@42cf5f62dfa2 /]# ls

bin  etc   lib    lost+found  mnt  proc  sbin     srv  tmp  var

dev  home  lib64  media       opt  root  selinux  sys  usr  

# docker run -i  -t jdeathe/centos-ssh-mysql /bin/sh  //交互式登陸docker 當前shell爲 /bin/sh

sh-4.1# ls

bin  etc   lib    lost+found  mnt  proc  sbin     srv  tmp  var

dev  home  lib64  media       opt  root  selinux  sys  usr

sh-4.1# 

sh-4.1#exit

#docker ps -a |grep  mysql

8a6344f013a9        jdeathe/centos-ssh-mysql:latest   "/bin/sh"              33 minutes ago      Exited (2) 11 minutes ago                       cocky_morse         

d4a564d0769a        jdeathe/centos-ssh-mysql:latest   "/bin/bash"            34 minutes ago      Exited (0) 34 minutes ago                       desperate_bohr      

42cf5f62dfa2        jdeathe/centos-ssh-mysql:latest   "bash"                 44 minutes ago      Exited (0) 41 minutes ago                       evil_morse          

#docker commit -m "jdeathe/centos-ssh-mysql+httpd" evil_morse apache  //建立本身的鏡像 apache，在原來的鏡像上安裝了http的服務

7ab0efe81674f51e0482d0b2b834926430fd974b162ef5ebbbd2f7d0b8f8baef

#docker p_w_picpaths  //查看本身建立的鏡像

REPOSITORY                 TAG                 IMAGE ID            CREATED             VIRTUAL SIZE

apache                     latest              7ab0efe81674        14 seconds ago      331.1 MB

jdeathe/centos-ssh-mysql   latest              8f3141d0a29c        3 weeks ago         331.1 MB

jdeathe/centos-ssh         latest              171447906a92        3 weeks ago         251.7 MB 

搭建本身的docker倉庫

#yum install -y docker-registry

啓動docker倉庫：

#service   docker-registry  start  // 7.0系統 #systemctl  start  docker-registry

配置防火牆；

# firewall-cmd --permanent --add-port=5000/tcp

# firewall-cmd --reload

#docker tag apache-1 server0.example.com:5000/httpd //上傳鏡像到倉庫

#docker push server0.example.com:5000/httpd

#docker pull server0.example.com:5000/httpd   //從倉庫拉取鏡像：

#docker save --output=rhel-apache.tar apache //輸出鏡像到文件

#tar -tf rhel-apache.tar

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repositories

此文件包含了鏡像重建所必須的全部層，能夠把它拷貝到其餘docker主機，使用docker load加載