CentOS7 安装Docker
1、安装
step 1: 安装必要的一些系统工具
yum install -y yum-utils device-mapper-persistent-data lvm2
Step 2: 添加软件源信息
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Step 3: 更新yum索引列表并安装Docker引擎
yum makecache fast
yum索引列表没有更新可以直接使用yum makecache
yum install docker-ce
Step 4: 开启Docker服务
service docker start
2、测试是否安装成功
docker version
3、配置下载docker镜像的仓库
step 1:进入aliyun.com,点击控制台,登录
step 2: 搜索 ‘容器镜像服务’
step 3:找到镜像加速器
step 4:回到linux控制台
输入
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://你自己的,每个人不一样.mirror.aliyuncs.com"] } EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
4、测试HelloWorld镜像
[root@tcq-gdyt docker]# docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 2db29710123e: Pull complete Digest: sha256:2498fce14358aa50ead0cc6c19990fc6ff866ce72aeb5546e1d59caac3d0d60f Status: Downloaded newer image for hello-world:latest Hello 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. (amd64) 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 bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/ [root@tcq-gdyt docker]# [root@tcq-gdyt docker]# ps -ef | grep docker root 18362 1 0 10:00 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock root 21371 22728 0 10:07 pts/3 00:00:00 grep --color=auto docker [root@tcq-gdyt docker]# docker images; REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest feb5d9fea6a5 13 months ago 13.3kB
5、docker数据目录迁移(修改文件存储位置)(此步可以需要时再做)
step 1: 查看docker原文件目录,并停掉docker 服务
[root@tcq-gdyt docker]# docker info Client: Context: default Debug Mode: false Plugins: app: Docker App (Docker Inc., v0.9.1-beta3) buildx: Docker Buildx (Docker Inc., v0.9.1-docker) scan: Docker Scan (Docker Inc., v0.21.0) Server: Containers: 1 Running: 0 Paused: 0 Stopped: 1 Images: 2 Server Version: 20.10.21 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true userxattr: false Logging Driver: json-file Cgroup Driver: cgroupfs Cgroup Version: 1 Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc Default Runtime: runc Init Binary: docker-init containerd version: 1c90a442489720eec95342e1789ee8a5e1b9536f runc version: v1.1.4-0-g5fd4c4d init version: de40ad0 Security Options: seccomp Profile: default Kernel Version: 3.10.0-1127.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 7.795GiB Name: tcq-gdyt.grgit.com ID: QN6B:LBRO:ILLU:7Z7Y:RFKW:RKCM:VCHN:R5F5:4IZ6:FRHS:LJJ5:5G5A Docker Root Dir: /var/lib/docker Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Registry Mirrors: https://qfq51k37.mirror.aliyuncs.com/ Live Restore Enabled: false
停掉服务
service docker stop
step2: 创建新的存储位置
mkdir -p /home/dockerRoot
将数据复制到新目录
cp -a /var/lib/docker /home/dockerRoot/
备份原目录
mv -u /var/lib/docker/ /var/lib/docker.bak
step3:修改配置文件
vim /etc/docker/paemon.json
{ "registry-mirrors": ["https://你只自己的.mirror.aliyuncs.com"], "data-root":"/home/dockerRooot/docker" }
step4:重启docker
service docker start
查看是否修改成功
docker info
查看 docker root dir
docker下载链接(Centos7) https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
参考:https://blog.csdn.net/m0_51338272/article/details/122801639