安装 Docker
本文档以实战的形式介绍 Docker 的安装过程，使用的系统是 CentOS7
1 安装 Docker
如果有的话，卸载旧的Docker，否则可能会不兼容
# yum remove -y docker docker-io docker-selinux python-docer-py安装 Docker-CE社区版本
# yum -y install docker-ce 启动 Docker
# systemctl start docker# systemctl enable dockerCreated symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.# systemctl status docker● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled) Active: active (running) since Mon 2020-03-30 13:17:47 EDT; 16s ago Docs: https://docs.docker.com Main PID: 12932 (dockerd) CGroup: /system.slice/docker.service └─12932 /usr/bin/dockerd -H fd:// --containerd=/run/contain...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker dockerd: time="2020-0...Mar 30 13:17:47 Docker systemd: Started Docker A...Hint: Some lines were ellipsized, use -l to show in full.# docker versionClient: Docker Engine - Community Version: 19.03.8 API version: 1.40 Go version: go1.12.17 Git commit: afacb8b Built: Wed Mar 11 01:27:04 2020 OS/Arch: linux/amd64 Experimental: falseServer: Docker Engine - Community Engine:Version: 19.03.8API version: 1.40 (minimum version 1.12)Go version: go1.12.17Git commit: afacb8bBuilt: Wed Mar 11 01:25:42 2020OS/Arch: linux/amd64Experimental: false containerd:Version: 1.2.13GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429 runc:Version: 1.0.0-rc10GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init:Version: 0.18.0GitCommit: fec36832 指定docker 镜像加速器 （很重要，不然后期从国外下载docker镜像会直接报错，而且速度慢）
国内docker仓库加速站点
https://registry.docker-cn.comhttp://hub-mirror.c.163.comhttps://3laho3y3.mirror.aliyuncs.comhttp://f1361db2.m.daocloud.iohttps://mirror.ccs.tencentyun.comhttps://docker.mirrors.ustc.edu.cnhttp://dockerhub.azk8s.cn/ 配置加速节点
# vim /etc/docker/daemon.json{"registry-mirrors": ["https://registry.docker-cn.com" ]}注意不可见字符！
注：如果需要使用自己的本地私有仓库，写成如下：{"registry-mirrors": ["https://e9yneuymirror.aliyuncs.com" ] "insecure-registries": ["192.168.10.7:4000" ]}另外的参考配置：{"insecure-registries": ["0.0.0.0/0" ],"log-opts": { "max-size": "20m", "max-file": "5"}}3 重启相关服务
# systemctl daemon-reload # systemctl restart docker && systemctl status docker4 显示 Docker 系统信息
# docker infoClient: Debug Mode: falseServer: Containers: 0Running: 0Paused: 0Stopped: 0 Images: 0 Server Version: 19.03.8 Storage Driver: overlay2Backing Filesystem: Supports d_type: trueNative Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 7ad184331fa3e55e52b890ea95e65ba581ae3429 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd init version: fec3683 Security Options:seccomp Profile: default Kernel Version: 3.10.0-957.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 7.62GiB Name: Docker ID: SZWH:KWZM:GDQA:ZRHY:PU7A:JV23:7TX3:SYUM:J3UX:ZEOR:JG44:SDHL 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://registry.docker-cn.com Live Restore Enabled: falseWARNING: IPv4 forwarding is disabledWARNING: bridge-nf-call-iptables is disabledWARNING: bridge-nf-call-ip6tables is disabled5 测试拉取 Docker 镜像
# docker image pull centos:latestlatest: Pulling from library/centos8a29a15cefae: Pull complete Digest: sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700Status: Downloaded newer image for centos:latestdocker.io/library/centos:latest#拉取 Docker 镜像成功# docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEcentos latest 470671670cac 2 months ago 237MB总结
以上就是 Docker 的安装过程，想看 Docker 后续操作的朋友请持续关注我的文章，希望我的文章能给大家带来帮助。
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