配置docker官方源并用yum安装docker

一、docker的官方安装文档：

https://docs.docker.com/engine/installation/linux/centos/

由docker给的文档可以看出它也只是去配置了一个docker的yum源、然后就通过这个源来安装docker了；在这个文档下我们采用手工配置

的方式

二、配置一个docker用的源：

　　1、为docker 增加一个新的yum配置文件；touch /etc/yum.repos.d/docker.repo

touch /etc/yum.repos.d/docker.repo

　　2、docker.repo的内容如下

[docker-ce-stable]name=Docker CE Stable - $basearchbaseurl=https://download.docker.com/linux/centos/7/$basearch/stableenabled=1gpgcheck=0 #我把这里设置成了0、说明我信任了这个源，不对它的rpm进行检察gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-stable-debuginfo]name=Docker CE Stable - Debuginfo $basearchbaseurl=https://download.docker.com/linux/centos/7/debug-$basearch/stableenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-stable-source]name=Docker CE Stable - Sourcesbaseurl=https://download.docker.com/linux/centos/7/source/stableenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-edge]name=Docker CE Edge - $basearchbaseurl=https://download.docker.com/linux/centos/7/$basearch/edgeenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-edge-debuginfo]name=Docker CE Edge - Debuginfo $basearchbaseurl=https://download.docker.com/linux/centos/7/debug-$basearch/edgeenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-edge-source]name=Docker CE Edge - Sourcesbaseurl=https://download.docker.com/linux/centos/7/source/edgeenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-test]name=Docker CE Test - $basearchbaseurl=https://download.docker.com/linux/centos/7/$basearch/testenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-test-debuginfo]name=Docker CE Test - Debuginfo $basearchbaseurl=https://download.docker.com/linux/centos/7/debug-$basearch/testenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg[docker-ce-test-source]name=Docker CE Test - Sourcesbaseurl=https://download.docker.com/linux/centos/7/source/testenabled=0gpgcheck=1gpgkey=https://download.docker.com/linux/centos/gpg

 

三、安装docker:

sudo yum install docker-ceLoaded plugins: fastestmirror, langpacksLoading mirror speeds from cached hostfileResolving Dependencies--> Running transaction check---> Package docker-ce.x86_64 0:17.03.1.ce-1.el7.centos will be installed--> Processing Dependency: docker-ce-selinux >= 17.03.1.ce-1.el7.centos for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64--> Running transaction check---> Package docker-ce-selinux.noarch 0:17.03.1.ce-1.el7.centos will be installed--> Finished Dependency ResolutionDependencies Resolved===================================================================================================================================== Package                          Arch                  Version                                Repository                       Size=====================================================================================================================================Installing: docker-ce                        x86_64                17.03.1.ce-1.el7.centos                docker-ce-stable                 19 MInstalling for dependencies: docker-ce-selinux                noarch                17.03.1.ce-1.el7.centos                docker-ce-stable                 28 kTransaction Summary=====================================================================================================================================Install  1 Package (+1 Dependent package)Total download size: 19 MInstalled size: 19 MIs this ok [y/d/N]: y

 

四、直接下载rpm包的方式来安装：

　　1、我在安装docker的时候发现下载的速度只有3kB/s 然而文件大小有19M；就在我感觉安装无望的时候、我机智的想到了自己直接把rpm下载下来

　　看了下docker.repo 、发现centos7的源地址是 https://download.docker.com/linux/centos/7/$basearch/stable 所以我只要去

https://download.docker.com/linux/centos/7/x86_64/stable/Packages/

　　用迅雷(我是会员有加速)把rpm包下载下来就行了

　　下载如下文件：

docker-ce-17.03.0.ce-1.el7.centos.x86_64.rpm docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch.rpm

 

五、安装docker:

lltotal 19096-rwxrwxrwx 1 jianglexing jianglexing 19521288 May 30 20:05 docker-ce-17.03.0.ce-1.el7.centos.x86_64.rpm-rw-r--r-- 1 jianglexing jianglexing    29108 May 30 20:15 docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch.rpm[root@workstudio docker]# yum localinstall *Loaded plugins: fastestmirror, langpacksExamining docker-ce-17.03.0.ce-1.el7.centos.x86_64.rpm: docker-ce-17.03.0.ce-1.el7.centos.x86_64Marking docker-ce-17.03.0.ce-1.el7.centos.x86_64.rpm to be installedExamining docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch.rpm: docker-ce-selinux-17.03.0.ce-1.el7.centos.noarchMarking docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch.rpm to be installedResolving Dependencies--> Running transaction check---> Package docker-ce.x86_64 0:17.03.0.ce-1.el7.centos will be installed---> Package docker-ce-selinux.noarch 0:17.03.0.ce-1.el7.centos will be installed--> Finished Dependency ResolutionDependencies Resolved===================================================================================================================================== Package                 Arch         Version                          Repository                                               Size=====================================================================================================================================Installing: docker-ce               x86_64       17.03.0.ce-1.el7.centos          /docker-ce-17.03.0.ce-1.el7.centos.x86_64                65 M docker-ce-selinux       noarch       17.03.0.ce-1.el7.centos          /docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch        43 kTransaction Summary=====================================================================================================================================Install  2 PackagesTotal size: 65 MInstalled size: 65 MIs this ok [y/d/N]: yDownloading packages:Running transaction checkRunning transaction testTransaction test succeededRunning transaction  Installing : docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch                                                                  1/2 setsebool:  SELinux is disabled.libsemanage.semanage_direct_install_info: Overriding docker module at lower priority 100 with module at priority 400.  Installing : docker-ce-17.03.0.ce-1.el7.centos.x86_64                                                                          2/2   Verifying  : docker-ce-17.03.0.ce-1.el7.centos.x86_64                                                                          1/2   Verifying  : docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch                                                                  2/2 Installed:  docker-ce.x86_64 0:17.03.0.ce-1.el7.centos                    docker-ce-selinux.noarch 0:17.03.0.ce-1.el7.centos                   Complete!

 

六、启动docker:

[root@workstudio docker]# systemctl start docker[root@workstudio docker]# ps -ef | grep dockerroot       4458      1  1 20:22 ?        00:00:00 /usr/bin/dockerdroot       4465   4458  0 20:22 ?        00:00:00 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainerd/containerd --shim docker-containerd-shim --runtime docker-runcroot       4589   4333  0 20:22 pts/1    00:00:00 grep --color=auto docker

 

七、测试docker是否能成功运行：

[root@workstudio docker]# docker run hello-worldUnable to find image 'hello-world:latest' locallylatest: Pulling from library/hello-world78445dd45222: Pull complete Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7Status: Downloaded newer image for hello-world:latestHello from Docker!This message shows that your installation appears to be working correctly.To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. 3. The Docker daemon created a new container from that image which runs the    executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it    to your terminal.To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bashShare images, automate workflows, and more with a free Docker ID: https://cloud.docker.com/For more examples and ideas, visit: https://docs.docker.com/engine/userguide/

如下是第一次运行hello-world 这个docker-image 由于它还不存在于本地、所以要下载它、这可能要用一点时间！