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docker1.12发布之后时隔好久才迎来2016年docker第二个最重要的版本的发布. 在这篇文章之中我们将一起看一下有哪些特性的增强并来简单体验一下.

主要变更

docker 1.13修复了很多过去的bug，同时也添加了很多新的特性，列举一些主要变化，如下：

影响

基于本次更新主要以功能增强和bug修正为主，所以对之前版本的影响不是很大。

安装前提

假定为centos7.2为宿主OS，之前如果安装有低版本的docker，最好先行删除，同时container-selinux和docker-common也一并删除。

[root@liumiaocn ~]# uname -r3.10.0-327.el7.x86_64[root@liumiaocn ~]# getconf LONG_BIT64[root@liumiaocn ~]#

安装

安装yum-utils

[root@liumiaocn ~]# yum install -y yum-utilsLoaded plugins: fastestmirror, langpacksDetermining fastest mirrors * base: mirrors.btte.net * epel: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.comPackage yum-utils-1.1.31-40.el7.noarch already installed and latest versionNothing to do[root@liumiaocn ~]# 已经安装

设定yum-config-manager

[root@liumiaocn ~]# yum-config-manager \>     --add-repo \>     https://docs.docker.com/engine/installation/linux/repo_files/centos/docker.repoLoaded plugins: fastestmirror, langpacksadding repo from: https://docs.docker.com/engine/installation/linux/repo_files/centos/docker.repograbbing file https://docs.docker.com/engine/installation/linux/repo_files/centos/docker.repo to /etc/yum.repos.d/docker.reporepo saved to /etc/yum.repos.d/docker.repo[root@liumiaocn ~]#

更新yum的package索引

[root@liumiaocn ~]# yum makecache fastLoaded plugins: fastestmirror, langpacksbase                                                                                                                        | 3.6 kB  00:00:00docker-main                                                                                                                 | 2.9 kB  00:00:00epel/x86_64/metalink                                                                                                        | 4.6 kB  00:00:00extras                                                                                                                      | 3.4 kB  00:00:00updates                                                                                                                     | 3.4 kB  00:00:00docker-main/primary_db                                                                                                      |  28 kB  00:00:02Loading mirror speeds from cached hostfile * base: mirrors.btte.net * epel: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.comMetadata Cache Created[root@liumiaocn ~]#

安装docker-engine

[root@liumiaocn ~]# rpm -e docker-common-1.10.3-59.el7.centos.x86_64[root@liumiaocn ~]#[root@liumiaocn ~]#[root@liumiaocn ~]# yum -y docker-engineLoaded plugins: fastestmirror, langpacksNo such command: docker-engine. Please use /usr/bin/yum --help[root@liumiaocn ~]# yum -y install docker-engineLoaded plugins: fastestmirror, langpacksLoading mirror speeds from cached hostfile * base: mirrors.btte.net * epel: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.aliyun.com * updates: mirrors.aliyun.comResolving Dependencies--> Running transaction check---> Package docker-engine.x86_64 0:1.13.0-1.el7.centos will be installed--> Processing Dependency: docker-engine-selinux >= 1.13.0-1.el7.centos for package: docker-engine-1.13.0-1.el7.centos.x86_64--> Processing Dependency: libltdl.so.7()(64bit) for package: docker-engine-1.13.0-1.el7.centos.x86_64--> Running transaction check---> Package docker-engine-selinux.noarch 0:1.13.0-1.el7.centos will be installed---> Package libtool-ltdl.x86_64 0:2.4.2-21.el7_2 will be installed--> Finished Dependency ResolutionDependencies Resolved=================================================================================================================================================== Package                                  Arch                      Version                                   Repository                      Size===================================================================================================================================================Installing: docker-engine                            x86_64                    1.13.0-1.el7.centos                       docker-main                     19 MInstalling for dependencies: docker-engine-selinux                    noarch                    1.13.0-1.el7.centos                       docker-main                     28 k libtool-ltdl                             x86_64                    2.4.2-21.el7_2                            base                            49 kTransaction Summary===================================================================================================================================================Install  1 Package (+2 Dependent packages)Total size: 19 MInstalled size: 65 MDownloading packages:Running transaction checkRunning transaction testTransaction test succeededRunning transactionWarning: RPMDB altered outside of yum.  Installing : docker-engine-selinux-1.13.0-1.el7.centos.noarch                                                                                1/3  Installing : libtool-ltdl-2.4.2-21.el7_2.x86_64                                                                                              2/3  Installing : docker-engine-1.13.0-1.el7.centos.x86_64                                                                                        3/3  Verifying  : libtool-ltdl-2.4.2-21.el7_2.x86_64                                                                                              1/3  Verifying  : docker-engine-selinux-1.13.0-1.el7.centos.noarch                                                                                2/3  Verifying  : docker-engine-1.13.0-1.el7.centos.x86_64                                                                                        3/3Installed:  docker-engine.x86_64 0:1.13.0-1.el7.centosDependency Installed:  docker-engine-selinux.noarch 0:1.13.0-1.el7.centos                              libtool-ltdl.x86_64 0:2.4.2-21.el7_2Complete![root@liumiaocn ~]#

启动docker

[root@liumiaocn ~]# systemctl enable docker; systemctl start docker;Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.[root@liumiaocn ~]#

确认版本

[root@liumiaocn ~]# docker versionClient: Version:      1.13.0 API version:  1.25 Go version:   go1.7.3 Git commit:   49bf474 Built:        Tue Jan 17 09:55:28 2017 OS/Arch:      linux/amd64Server: Version:      1.13.0 API version:  1.25 (minimum version 1.12) Go version:   go1.7.3 Git commit:   49bf474 Built:        Tue Jan 17 09:55:28 2017 OS/Arch:      linux/amd64 Experimental: false[root@liumiaocn ~]#

新增功能

docker新添加的特性的使用方法，比如docker system:

[root@liumiaocn ~]# docker systemUsage:  docker system COMMANDManage DockerOptions:      --help   Print usageCommands:  df          Show docker disk usage  events      Get real time events from the server  info        Display system-wide information  prune       Remove unused dataRun 'docker system COMMAND --help' for more information on a command.[root@liumiaocn ~]#

docker secret:

[root@liumiaocn ~]# docker secretUsage:  docker secret COMMANDManage Docker secretsOptions:      --help   Print usageCommands:  create      Create a secret from a file or STDIN as content  inspect     Display detailed information on one or more secrets  ls          List secrets  rm          Remove one or more secretsRun 'docker secret COMMAND --help' for more information on a command.[root@liumiaocn ~]#

总结

这篇文章中一起看了一下docker1.13中有哪些新的特性以及如何在centos上进行安装。详细的使用在后面的文章中将会进一步展开。

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