Docker如何安装与卸载

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准备工作

系统：centos6.x

安装

1. 关闭seLinux

vim /etc/selinux/config

修改后的值: SELINUX=disabled

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#       enforcing - SELinux security policy is enforced.
#       permissive - SELinux prints warnings instead of enforcing.
#       disabled - SELinux is fully disabled.
SELINUX=disabled
# SELINUXTYPE= type of policy in use. Possible values are:
#       targeted - Only targeted network daemons are protected.
#       strict - Full SELinux protection.
SELINUXTYPE=targeted

查看状态：sestatus

状态不为disabled，则重启

[root@iZwz9eczt2tstmhvm8mv25Z docker]# sestatus
SELinux status:                 disabled
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

2. 安装epel源

下载wget http://ftp.riken.jp/Linux/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm

# wget http://ftp.riken.jp/Linux/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
--2017-04-25 09:55:43--  http://ftp.riken.jp/Linux/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
正在解析主机 ftp.riken.jp... 134.160.38.1
正在连接 ftp.riken.jp|134.160.38.1|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：14540 (14K) [text/plain]
正在保存至: “epel-release-6-8.noarch.rpm”

100%[======================================>] 14,540      43.5K/s   in 0.3s    

2017-04-25 09:55:46 (43.5 KB/s) - 已保存 “epel-release-6-8.noarch.rpm” [14540/14540])

[root@iZwz9eczt2tstmhvm8mv25Z docker]# ls
epel-release-6-8.noarch.rpm
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

安装rpm -ivh epel-release-6-8.noarch.rpm

[root@iZwz9eczt2tstmhvm8mv25Z docker]# rpm -ivh epel-release-6-8.noarch.rpm 
warning: epel-release-6-8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing...                ########################################### [100%]
   1:epel-release           warning: /etc/yum.repos.d/epel.repo created as /etc/yum.repos.d/epel.repo.rpmnew
########################################### [100%]
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

3. 安装lxc与libcgroup

yum install lxc libcgroup

[root@iZwz9eczt2tstmhvm8mv25Z docker]# yum install lxc libcgroup
Loaded plugins: security
base                                                     | 3.7 kB     00:00     
epel                                                     | 4.3 kB     00:00     
epel/primary_db                                          | 5.9 MB     00:05     
extras                                                   | 3.4 kB     00:00     
updates                                                  | 3.4 kB     00:00     
updates/primary_db                                       | 803 kB     00:00     
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package libcgroup.x86_64 0:0.40.rc1-23.el6 will be installed
---> Package lxc.x86_64 0:1.0.9-1.el6 will be installed
--> Processing Dependency: lua-lxc(x86-64) = 1.0.9-1.el6 for package: lxc-1.0.9-1.el6.x86_64
--> Processing Dependency: lua-alt-getopt for package: lxc-1.0.9-1.el6.x86_64
--> Processing Dependency: liblxc.so.1()(64bit) for package: lxc-1.0.9-1.el6.x86_64
--> Running transaction check
---> Package lua-alt-getopt.noarch 0:0.7.0-1.el6 will be installed
---> Package lua-lxc.x86_64 0:1.0.9-1.el6 will be installed
--> Processing Dependency: lua-filesystem for package: lua-lxc-1.0.9-1.el6.x86_64
---> Package lxc-libs.x86_64 0:1.0.9-1.el6 will be installed
--> Running transaction check
---> Package lua-filesystem.x86_64 0:1.4.2-1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package               Arch          Version                  Repository   Size
================================================================================
Installing:
 libcgroup             x86_64        0.40.rc1-23.el6          base        131 k
 lxc                   x86_64        1.0.9-1.el6              epel        122 k
Installing for dependencies:
 lua-alt-getopt        noarch        0.7.0-1.el6              epel        6.9 k
 lua-filesystem        x86_64        1.4.2-1.el6              epel         24 k
 lua-lxc               x86_64        1.0.9-1.el6              epel         16 k
 lxc-libs              x86_64        1.0.9-1.el6              epel        257 k

Transaction Summary
================================================================================
Install       6 Package(s)

Total download size: 557 k
Installed size: 1.3 M
Is this ok [y/N]: y
Downloading Packages:
(1/6): libcgroup-0.40.rc1-23.el6.x86_64.rpm              | 131 kB     00:00     
(2/6): lua-alt-getopt-0.7.0-1.el6.noarch.rpm             | 6.9 kB     00:00     
(3/6): lua-filesystem-1.4.2-1.el6.x86_64.rpm             |  24 kB     00:00     
(4/6): lua-lxc-1.0.9-1.el6.x86_64.rpm                    |  16 kB     00:00     
(5/6): lxc-1.0.9-1.el6.x86_64.rpm                        | 122 kB     00:00     
(6/6): lxc-libs-1.0.9-1.el6.x86_64.rpm                   | 257 kB     00:00     
--------------------------------------------------------------------------------
Total                                           675 kB/s | 557 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
** Found 3 pre-existing rpmdb problem(s), 'yum check' output follows:
2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of libMySQLclient.so.16()(64bit)
2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of libmysqlclient.so.16(libmysqlclient_16)(64bit)
2:postfix-2.6.6-6.el6_5.x86_64 has missing requires of mysql-libs
  Installing : lxc-libs-1.0.9-1.el6.x86_64                                  1/6 
  Installing : lua-filesystem-1.4.2-1.el6.x86_64                            2/6 
  Installing : lua-lxc-1.0.9-1.el6.x86_64                                   3/6 
  Installing : lua-alt-getopt-0.7.0-1.el6.noarch                            4/6 
  Installing : lxc-1.0.9-1.el6.x86_64                                       5/6 
  Installing : libcgroup-0.40.rc1-23.el6.x86_64                             6/6 
  Verifying  : lua-lxc-1.0.9-1.el6.x86_64                                   1/6 
  Verifying  : lxc-libs-1.0.9-1.el6.x86_64                                  2/6 
  Verifying  : lxc-1.0.9-1.el6.x86_64                                       3/6 
  Verifying  : lua-alt-getopt-0.7.0-1.el6.noarch                            4/6 
  Verifying  : libcgroup-0.40.rc1-23.el6.x86_64                             5/6 
  Verifying  : lua-filesystem-1.4.2-1.el6.x86_64                            6/6 

Installed:
  libcgroup.x86_64 0:0.40.rc1-23.el6          lxc.x86_64 0:1.0.9-1.el6         

Dependency Installed:
  lua-alt-getopt.noarch 0:0.7.0-1.el6    lua-filesystem.x86_64 0:1.4.2-1.el6   
  lua-lxc.x86_64 0:1.0.9-1.el6           lxc-libs.x86_64 0:1.0.9-1.el6         

Complete!
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

4. 安装docker-io

yum install docker-io

[root@iZwz9eczt2tstmhvm8mv25Z docker]# yum install docker-io
Loaded plugins: security
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package docker-io.x86_64 0:1.7.1-2.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package            Arch            Version                 Repository     Size
================================================================================
Installing:
 docker-io          x86_64          1.7.1-2.el6             epel          4.6 M

Transaction Summary
================================================================================
Install       1 Package(s)

Total download size: 4.6 M
Installed size: 19 M
Is this ok [y/N]: y 
Downloading Packages:
docker-io-1.7.1-2.el6.x86_64.rpm                         | 4.6 MB     00:04     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : docker-io-1.7.1-2.el6.x86_64                                 1/1 
  Verifying  : docker-io-1.7.1-2.el6.x86_64                                 1/1 

Installed:
  docker-io.x86_64 0:1.7.1-2.el6                                                

Complete!
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

5. 启动docker进程

/etc/init.d/docker start

[root@iZwz9eczt2tstmhvm8mv25Z docker]# /etc/init.d/docker start
Starting cgconfig service:                                 [  OK  ]
Starting docker:                                       [确定]
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

6. 查看docker进程

ps -ef|grep docker or /etc/init.d/docker status

卸载

yum remove docker-io

常见问题

启动不了

查看启动日志

docker -d

[root@iZwz9eczt2tstmhvm8mv25Z docker]# /etc/init.d/docker status
docker 已死，但 pid 文件仍存
[root@iZwz9eczt2tstmhvm8mv25Z docker]# docker -d
WARN[0000] You are running linux kernel version 2.6.32-573.22.1.el6.x86_64, which might be unstable running docker. Please upgrade your kernel to 3.10.0. 
docker: relocation error: docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

解决方式

安装：yum install device-mapper-event-libs

重启并查看其状态

[root@iZwz9eczt2tstmhvm8mv25Z docker]# /etc/init.d/docker restart
停止 docker：                                              [失败]
Starting docker:                                       [确定]
[root@iZwz9eczt2tstmhvm8mv25Z docker]# /etc/init.d/docker status
docker (pid  17162) 正在运行...
[root@iZwz9eczt2tstmhvm8mv25Z docker]#

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