[系统运维]部署Docker容器虚拟化平台及镜像加速地址

部署环境：
操作系统：CentOS 7
Docker环境依赖包

yum install -y yum-utils device-mapper-persistent-data lvm2

配置国内Docker-ce yum源

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装Docker程序

[root@centos7 ~]# yum install docker-ce docker-ce-cli containerd.io -y

docker-ce-cli -- docker命令行工具包
containerd.io -- 容器接口相关包

启动Docker 并将服务加载到自动启动项

systemctl start docker && systemctl enable docker

查看Docker版本信息

docker version

查看Docker运行信息
docker info

[root@centos7 ~]# docker info
	Client:
	 Context:    default
	 Debug Mode: false
	 Plugins:
	  app: Docker App (Docker Inc., v0.9.1-beta3)
	  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
	  scan: Docker Scan (Docker Inc., v0.8.0)

	Server:
	 Containers: 0
	  Running: 0
	  Paused: 0
	  Stopped: 0
	 Images: 0
	 Server Version: 20.10.7
	 Storage Driver: overlay2
	  Backing Filesystem: extfs
	  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.runtime.v1.linux runc io.containerd.runc.v2
	 Default Runtime: runc
	 Init Binary: docker-init
	 containerd version: e25210fe30a0a703442421b0f60afac609f950a3
	 runc version: v1.0.1-0-g4144b63
	 init version: de40ad0
	 Security Options:
	  seccomp
	   Profile: default
	 Kernel Version: 3.10.0-1160.el7.x86_64
	 Operating System: CentOS Linux 7 (Core)
	 OSType: linux
	 Architecture: x86_64
	 CPUs: 2
	 Total Memory: 1.79GiB
	 Name: centos7
	 ID: BHJ4:X6ND:J23A:64TD:GEAN:3OZZ:YYVF:6PDB:DI2Y:R45K:BAL7:A3W5
	 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
	 Live Restore Enabled: false

 搜索Centos 镜像

 [root@centos7 ~]# docker search centos
	NAME                              DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
	centos                            The official build of CentOS.                   6669      [OK]       
	ansible/centos7-ansible           Ansible on Centos7                              134                  [OK]
	consol/centos-xfce-vnc            Centos container with "headless" VNC session…   129                  [OK]
	jdeathe/centos-ssh                OpenSSH / Supervisor / EPEL/IUS/SCL Repos - …   118                  [OK]
	centos/systemd                    systemd enabled base container.                 101                  [OK]
	centos/mysql-57-centos7           MySQL 5.7 SQL database server                   91                   
	imagine10255/centos6-lnmp-php56   centos6-lnmp-php56                              58                   [OK]
	tutum/centos                      Simple CentOS docker image with SSH access      48                   
	jdeathe/centos-ssh-apache-php     Apache PHP - CentOS.                            31                   [OK]
	kinogmt/centos-ssh                CentOS with SSH                                 29                   [OK]
	guyton/centos6                    From official centos6 container with full up…   10                   [OK]
	nathonfowlie/centos-jre           Latest CentOS image with the JRE pre-install…   8                    [OK]
	centos/tools                      Docker image that has systems administration…   7                    [OK]
	drecom/centos-ruby                centos ruby                                     6                    [OK]
	mamohr/centos-java                Oracle Java 8 Docker image based on Centos 7    3                    [OK]
	darksheer/centos                  Base Centos Image -- Updated hourly             3                    [OK]
	miko2u/centos6                    CentOS6 日本語環境                                   2                    [OK]
	dokken/centos-7                   CentOS 7 image for kitchen-dokken               2                    
	indigo/centos-maven               Vanilla CentOS 7 with Oracle Java Developmen…   2                    [OK]
	amd64/centos                      The official build of CentOS.                   2                    
	mcnaughton/centos-base            centos base image                               1                    [OK]
	blacklabelops/centos              CentOS Base Image! Built and Updates Daily!     1                    [OK]
	myheritage/centos7-git-java       CentOs based docker image for Jenkins slave     1                    [OK]
	smartentry/centos                 centos with smartentry                          0                    [OK]
	starlabio/centos-native-build     Our CentOS image for native builds              0                    [OK]

下载Docker centos镜像

docker pull centos

修改Docker 镜像加速器，提升pull的速度
登录 https://cr.console.aliyun.com
配置镜像加速器：

sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://s7cngrav.mirror.aliyuncs.com","https://docker.mirrors.ustc.edu.cn/","https://hub-mirror.c.163.com/","https://reg-mirror.qiniu.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

配置docker路由策略

vim /etc/sysctl.d/99-sysctl.conf
# 添加配置：
net.ipv4.ip_forward = 1