docker 1.12是今年docker迄今发布的最为重要的一个版本，它大大增强了docker的内置编排机制。在一直被诟病的集群的构成方面也交出了自己的答卷。虽然增加的功能让你在使用的时候有一种在使用kubernetes的感觉，但这个世界不就是这样么，你有的我也有，我有的是原生态。闲话不说，安装。
设定Yum
docker缺省的Yum库使用的是main，基本上是稳定的版本。目前该版本为1.10。而在centos上安装只需要设定为experimental。将其baseurl设定为https://yum.dockerproject.org/repo/experimental/centos/7/即可。以后升到1.99估计也可以用同样的花招抢先试用吧。以下为设定方式：
cat > /etc/yum
.repos.d/docker
.repo <<-EOF
[dockerrepo]
name=Docker Repository
baseurl=https://yum
.dockerproject.org/repo/experimental/centos/
7/
enabled=
1
gpgcheck=
1
gpgkey=https://yum
.org/gpg
EOF
确认旧的docker相关的组件并删除
你的机器上一定有用centos简易安装方式yum install docker安装的各种docker组件。安装1.12之前先把它们删掉吧，不然后面有可能还是会提示你删除的。
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[root@host32 ~]
# rpm -qa |grep docker
docker-selinux-
1.10.3-
44.el7
.centos.x86_64
docker-common-
.x86_64
docker-forward-journald-
.x86_64
docker-
.x86_64
[root@host32 ~]
#
[root@host32 ~]
# yum -y remove docker-selinux-1.10.3-44.el7.centos.x86_64
[root@host32 ~]
# yum -y remove docker-common-1.10.3-44.el7.centos.x86_64
[root@host32 ~]
# yum -y remove docker-forward-journald-1.10.3-44.el7.centos.x86_64
[root@host32 ~]
# yum -y remove docker-1.10.3-44.el7.centos.x86_64
安装docker-engine
安装命令：yum -y install docker-engine
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[root@host32 ~]
# yum install -y docker-engine
Loaded plugins: fastestmirror,langpacks
dockerrepo |
2.9 kB
00:
00
dockerrepo/primary_db |
49 kB
03
Loading mirror speeds from cached hostfile
* base: mirrors
.tuna.tsinghua.edu.cn
* epel: mirror
.premi.st
* extras: mirrors
.cn
* updates: mirrors
.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package docker-engine
.x86_64
0:
1.12.0-
1.el7
.centos will be installed
--> Processing Dependency: docker-engine-selinux >=
.centos for package: docker-engine-
.x86_64
--> Running transaction check
---> Package docker-engine-selinux
.noarch .centos will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
docker-engine x86_64
.centos dockerrepo
19 M
Installing for dependencies:
docker-engine-selinux noarch
28 k
Transaction Summary
===================================================================================================================================================
Install
1 Package (+
1 Dependent package)
Total download size:
19 M
Installed size:
79 M
Downloading packages:
warning: /var/cache/yum/x86_64/
7/dockerrepo/packages/docker-engine-selinux-
.noarch.rpm: Header V4 RSA/SHA512 Signature,key ID
2c52609d: NOKEY
Public key for docker-engine-selinux-
.rpm is not installed
(
1/
2): docker-engine-selinux-
.rpm |
28 kB
02
(
2/
2): docker-engine-
.x86_64
.rpm |
19 MB
07:
34
---------------------------------------------------------------------------------------------------------------------------------------------------
Total
43 kB/s |
34
Retrieving key from https://yum
.org/gpg
Importing GPG key
0x2C52609D:
Userid :
"Docker Release Tool (releasedocker) <docker@docker.com>"
Fingerprint:
5811 8e89 f3a9
1289 7c07
0adb f762
2157 2c52
609d
From : https://yum
.org/gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : docker-engine-selinux-
.noarch 2
Installing : docker-engine-
.x86_64
2
Verifying : docker-engine-selinux-
2
Verifying : docker-engine-
2
Installed:
docker-engine
.centos
Dependency Installed:
docker-engine-selinux
.centos
Complete!
[root@host32 ~]
#
设定自启动
命令：systemctl enable docker
启动docker服务
命令：systemctl start docker
确认docker版本
命令：docker info
确认server version为1.12
[root@host32 ~]# docker info
Containers: 1
Running: 0
Paused: 0
Stopped: 1
Images: 3
Server Version: .0
Storage Driver: devicemapper
Pool Name: docker-253:0-19943542-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 2.443 GB
Data Space Total: 107.4 GB
Data Space Available: 1.789 GB
Metadata 3.568 MB
Metadata 2.147 GB
Metadata 1.789 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/Metadata
Library 1.02.107-RHEL7 (2015-10-14)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge null host overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel 3.10327.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
cpus: 1
Total Memory: 1.939 GiB
Name: host32
ID: F5ZC:SZXG:H3MC:3UHT:N3K3:XLYQ:IC6I:ZQN5:2TPK:T7RT:AIJB:Z3IM
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: bridge-nf-call-ip6tables is disabled
Experimental: true
Insecure Registries:
127.0.0.0/8
[root@host32 ~]#
转载自：http://blog.csdn.net/liumiaocn/article/details/52130852