这篇文章将为大家详细讲解有关Docker如何安装与卸载，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
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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