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

[root@Docker ]# yum remove -y docker docker-io docker-selinuxpython-docer-py

安装 Docker-CE社区版本

[root@Docker ]# yum -y install docker-ce

启动 Docker

[root@Docker ]# systemctl start docker

[root@Docker ]# systemctl enable docker

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

[root@Docker ]# 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[12932 ]: time="2020-0...

Mar 30 13:17:47 Docker systemd[1 ]: Started Docker A...

Hint: Some lines were ellipsized, use -l to show in full.

[root@Docker ]# docker version

Client: 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: false

Server: Docker Engine - Community

Engine:

Version: 19.03.8

API version: 1.40 (minimum version 1.12)

Go version: go1.12.17

Git commit: afacb8b

Built: Wed Mar 11 01:25:42 2020

OS/Arch: linux/amd64

Experimental: false

containerd:

Version: 1.2.13

GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429

runc:

Version: 1.0.0-rc10

GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd

docker-init:

Version: 0.18.0

GitCommit: fec3683

2 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.com

http://hub-mirror.c.163.com

https://3laho3y3.mirror.aliyuncs.com

http://f1361db2.m.daocloud.io

https://mirror.ccs.tencentyun.com

https://docker.mirrors.ustc.edu.cn

http://dockerhub.azk8s.cn/

配置加速节点

[root@Docker ]# 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

[root@Docker ]# systemctl daemon-reload

[root@Docker ]# systemctl restart docker && systemctl status docker

4 显示 Docker 系统信息

[root@Docker ]# docker infoClient: Debug Mode: falseServer: Containers: 0 Running: 0 Paused: 0 Stopped: 0 Images: 0 Server Version: 19.03.8 Storage Driver: overlay2 Backing Filesystem: Supports d_type: true

Native Overlay Diff: true

Logging Driver: json-file

Cgroup Driver: cgroupfs

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: 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: false

WARNING: IPv4 forwarding is disabled

WARNING: bridge-nf-call-iptables is disabled

WARNING: bridge-nf-call-ip6tables is disabled

5 测试拉取 Docker 镜像

[root@Docker ]# docker image pull centos:latest

latest: Pulling from library/centos

8a29a15cefae: Pull complete

Digest: sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700

Status: Downloaded newer image for centos:latest

docker.io/library/centos:latest

#拉取 Docker 镜像成功

[root@Docker ]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

centos 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。