Docker社区版（CE）：为了开发人员或小团队创建基于容器的应用,与团队成员分享和自动化的开发管道。docker-ce提供了简单的安装和快速的安装，以便可以立即开始开发。docker-ce集成和优化，基础设施。
实验环境
操作系统：Ubuntu 18.04.4 LTS
LAN IP ：192.168.3.22
Docker是现代软件开发和DevOps持续集成和部署管道中不可或缺的一部分,大部分公司都使用容器化技术，降低服务器成本。
安装必要的系统资源库
root@linuxcool:~# apt-get update
root@linuxcool:~# apt-get -y install apt-transport-https ca-certificates curl software-properties-common安装GPG证3书
root@linuxcool:~# curl -fsSL https://mirrors.nwafu.edu.cn/docker-ce/linux/ubuntu/gpg | apt-key add -Docker服务器在国外，如果使用docker.io来安装docker会非常慢，有时候还会超时断开导致无法安装成功；所以，我这里使用的是国内“西北农林科技大学网络与教育技术中心”镜像加速，国内还有很多镜像加速站点，比如：阿里云、腾讯云、网易、清华大学等，
更新系统并安装Docker-CE
root@linuxcool:~# apt-get -y update
root@linuxcool:~# apt-get -y install docker-ce通过以上命令安装的是docker最新版本，如果要安装docker，请继续阅读下文，
查找Docker-CE的版本
apt-cache madison docker-ce
docker-ce | 5:19.03.8~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.7~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.6~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.5~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.4~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.3~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.2~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.1~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:19.03.0~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.9~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.8~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.7~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.6~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.5~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.4~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.3~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.2~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.1~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.0~3-0~ubuntu-bionic | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.3~ce~3-0~ubuntu | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.2~ce~3-0~ubuntu | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.1~ce~3-0~ubuntu | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.0~ce~3-0~ubuntu | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.03.1~ce~3-0~ubuntu | https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic/stable amd64 Packages
安装指定版本的Docker-CE，比如要安装19.03.8~3-0~ubuntu-bionic
root@linuxcool:~# apt-get -y install docker-ce=19.03.8~3-0~ubuntu-bionic安装校验
root@linuxcool:~# docker version
Client: Docker Engine - Community
Version: 19.03.8
API version: 1.40
Go version: go1.12.17
Git commit: afacb8b7f0
Built: Wed Mar 11 01:25:46 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: afacb8b7f0
Built: Wed Mar 11 01:24:19 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
配置镜像加速
创建daemon.json配置文件
root@linuxcool:~# vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://dockerhub.mirrors.nwafu.edu.cn/"]
}
默认daemon.json文件不存在，如果daemon.json文件不存在，自己创建
加载配置，重启docker服务
root@linuxcool:~# systemctl daemon-reload
root@linuxcool:~# systemctl restart docker验证镜像加速是否配置生效
root@linuxcool:~# docker info
Client:
Debug Mode: false
Server:
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:
apparmor
seccomp
Profile: default
Kernel Version: 5.3.0-51-generic
Operating System: Ubuntu 18.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 15.64GiB
Name: linuxcool
ID: K252:G32L:GWWN:J5FE:3MFZ:2ITG:UE7Y:Y26F:QT3Q:2PLS:HCUX:PJYZ
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://dockerhub.mirrors.nwafu.edu.cn/
Live Restore Enabled: false
WARNING: No swap limit support
Registry Mirrors默认是docker.io，如果看到Registry Mirrors变https://dockerhub.mirrors.nwafu.edu.cn说明配置已经生效。
docker服务管理
#自启服务
root@linuxcool:~# systemctl enable docker.service#服务状态
root@linuxcool:~# systemctl status docker.service#启动服务
root@linuxcool:~# systemctl start docker.service#重启服务
root@linuxcool:~# systemctl restart docker.service#停止服务
root@linuxcool:~# systemctl stop docker.service拉取镜像
root@linuxcool:~# docker pull centos:8.1.1911
8.1.1911: Pulling from library/centos
8a29a15cefae: Pull complete
Digest: sha256:fe8d824220415eed5477b63addf40fb06c3b049404242b31982106ac204f6700
Status: Downloaded newer image for centos:8.1.1911
docker.io/library/centos:8.1.1911
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