docker 系列1 安装
一.使用存储库安装
我这里使用腾讯云centos 7系统
[root@VM_0_12_centos opt]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core)
1. 安装yum-utils软件包(提供yum-config-manager 实用程序)
[root@VM_0_12_centos ~]# sudo yum install -y yum-utils
2.设置稳定的存储库
sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo
3. 安装最新版本的docker engine和容器,或安装特定版本,这里选择安装特定版本,这里在存储库中列出可用版本,然后选择并安装:
[root@VM_0_12_centos ~]# yum list docker-ce --showduplicates | sort -r Loading mirror speeds from cached hostfile Loaded plugins: fastestmirror, langpacks docker-ce.x86_64 3:19.03.8-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.7-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.6-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.5-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.4-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.3-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.2-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.1-3.el7 docker-ce-stable docker-ce.x86_64 3:19.03.0-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.9-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.8-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.7-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.6-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.5-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.4-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.3-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.2-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.1-3.el7 docker-ce-stable docker-ce.x86_64 3:18.09.0-3.el7 docker-ce-stable docker-ce.x86_64 18.06.3.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.2.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable docker-ce.x86_64 18.03.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 18.03.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.12.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.12.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.09.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.09.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.06.2.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.06.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.06.0.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.3.ce-1.el7 docker-ce-stable docker-ce.x86_64 17.03.2.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.1.ce-1.el7.centos docker-ce-stable docker-ce.x86_64 17.03.0.ce-1.el7.centos docker-ce-stable
这里选择特定版本安装
[root@VM_0_12_centos ~]# sudo yum install docker-ce-18.09.1 docker-ce-cli-18.09.1 containerd.io
Docker已安装但尚未启动。docker组已创建,但没有用户添加到该组,查看版本号
[root@VM_0_12_centos ~]# docker version Client: Version: 18.09.1 API version: 1.39 Go version: go1.10.6 Git commit: 4c52b90 Built: Wed Jan 9 19:35:01 2019 OS/Arch: linux/amd64 Experimental: false Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
4.启动docker
[root@VM_0_12_centos ~]# sudo systemctl start docker
5.通过运行hello-world 镜像来验证是否正确安装了Docker Engine
[root@VM_0_12_centos ~]# sudo docker run hello-world
此命令会下载镜像并运行一个容器,容器运行时,它会打印参考消息并退出
[root@VM_0_12_centos ~]# sudo systemctl start docker [root@VM_0_12_centos ~]# sudo docker run hello-world Unable to find image 'hello-world:latest' locally Trying to pull repository docker.io/library/hello-world ... latest: Pulling from docker.io/library/hello-world 0e03bdcc26d7: Pull complete Digest: sha256:8e3114318a995a1ee497790535e7b88365222a21771ae7e53687ad76563e8e76 Status: Downloaded newer image for docker.io/hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly.
Docker Engine已安装并正在运行。您需要使用sudo来运行Docker命令,用于linux主机更好地与docker配合是可选的,参考:https://docs.docker.com/engine/install/linux-postinstall/
6. 查看所有容器
这里可以看到刚创建的容器,以及容器中的镜像为hello-world. 注意到状态为Exited,因为该镜像的应用为后端进程,执行后容器便退出了,后面说到容器时再介绍
[root@VM_0_12_centos ~]# docker container ls -all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 218266cad2b6 hello-world "/hello" 10 seconds ago Exited (0) 9 seconds ago condescending_lichterman
安装官方参考:https://docs.docker.com/engine/install/centos/
文档中还包括卸载docker旧版本,升级docker版本
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