Docker 1 12新功能探索（1） centos7上安裝docker1 12
阿新 • • 發佈：2018-12-10
docker 1.12是今年docker迄今釋出的最為重要的一個版本，它大大增強了docker的內建編排機制。在一直被詬病的叢集的構成方面也交出了自己的答卷。雖然增加的功能讓你在使用的時候有一種在使用kubernetes的感覺，但這個世界不就是這樣麼，你有的我也有，我有的是原生態。閒話不說，安裝。
| Linux | 版本 |
|---|---|
| CentOS | 7.2 |
設定Yum
docker預設的Yum庫使用的是main，基本上是穩定的版本。目前該版本為1.10。而在centos上安裝只需要設定為experimental。將其baseurl設定為
https://yum.dockerproject.org/repo/experimental/centos/7/即可。以後升到1.99估計也可以用同樣的花招搶先試用吧。以下為設定方式：
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.dockerproject.org/gpg
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確認舊的docker相關的元件並刪除
你的機器上一定有用centos簡易安裝方式yum install docker安裝的各種docker元件。安裝1.12之前先把它們刪掉吧，不然後面有可能還是會提示你刪除的。
[[email protected] ~]# rpm -qa |grep docker
docker-selinux-1.10.3-44.el7.centos.x86_64
docker-common-1.10.3-44.el7.centos.x86_64
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安裝docker-engine
安裝命令：yum -y install docker-engine
[[email protected] ~]# yum install -y docker-engine
Loaded plugins: fastestmirror, langpacks
dockerrepo | 2.9 kB 00:00:00
dockerrepo/primary_db | 49 kB 00:00:03
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* epel: mirror.premi.st
* extras: mirrors.tuna.tsinghua.edu.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 >= 1.12.0-1.el7.centos for package: docker-engine-1.12.0-1.el7.centos.x86_64
--> Running transaction check
---> Package docker-engine-selinux.noarch 0:1.12.0-1.el7.centos will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
docker-engine x86_64 1.12.0-1.el7.centos dockerrepo 19 M
Installing for dependencies:
docker-engine-selinux noarch 1.12.0-1.el7.centos dockerrepo 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-1.12.0-1.el7.centos.noarch.rpm: Header V4 RSA/SHA512 Signature, key ID 2c52609d: NOKEY
Public key for docker-engine-selinux-1.12.0-1.el7.centos.noarch.rpm is not installed
(1/2): docker-engine-selinux-1.12.0-1.el7.centos.noarch.rpm | 28 kB 00:00:02
(2/2): docker-engine-1.12.0-1.el7.centos.x86_64.rpm | 19 MB 00:07:34
---------------------------------------------------------------------------------------------------------------------------------------------------
Total 43 kB/s | 19 MB 00:07:34
Retrieving key from https://yum.dockerproject.org/gpg
Importing GPG key 0x2C52609D:
Userid : "Docker Release Tool (releasedocker) <[email protected]>"
Fingerprint: 5811 8e89 f3a9 1289 7c07 0adb f762 2157 2c52 609d
From : https://yum.dockerproject.org/gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : docker-engine-selinux-1.12.0-1.el7.centos.noarch 1/2
Installing : docker-engine-1.12.0-1.el7.centos.x86_64 2/2
Verifying : docker-engine-selinux-1.12.0-1.el7.centos.noarch 1/2
Verifying : docker-engine-1.12.0-1.el7.centos.x86_64 2/2
Installed:
docker-engine.x86_64 0:1.12.0-1.el7.centos
Dependency Installed:
docker-engine-selinux.noarch 0:1.12.0-1.el7.centos
Complete!
[[email protected] ~]#- 1
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設定自啟動
命令：systemctl enable docker
啟動docker服務
命令：systemctl start docker
確認docker版本
命令：docker info
確認server version為1.12
[[email protected] ~]# docker info
Containers: 1
Running: 0
Paused: 0
Stopped: 1
Images: 3
Server Version: 1.12.0
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 Space Used: 3.568 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 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 Version: 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 Version: 3.10.0-327.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
Debug 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
[[email protected] ~]#- 1
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