CentOS下安装docker

原文：https://yq.aliyun.com/articles/110806?spm=5176.8351553.0.0.25ec1991x2SmsT

# step 1: 安装必要的一些系统工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
# Step 2: 添加软件源信息
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# Step 3: 更新并安装 Docker-CE
sudo yum makecache fast
sudo yum -y install docker-ce
# Step 4: 开启Docker服务
sudo service docker start

注意：其他注意事项在下面的注释中
# 官方软件源默认启用了最新的软件，您可以通过编辑软件源的方式获取各个版本的软件包。例如官方并没有将测试版本的软件源置为可用，你可以通过以下方式开启。同理可以开启各种测试版本等。
# vim /etc/yum.repos.d/docker-ce.repo
#   将 [docker-ce-test] 下方的 enabled=0 修改为 enabled=1
#
# 安装指定版本的Docker-CE:
# Step 1: 查找Docker-CE的版本:
# yum list docker-ce.x86_64 --showduplicates | sort -r
#   Loading mirror speeds from cached hostfile
#   Loaded plugins: branch, fastestmirror, langpacks
#   docker-ce.x86_64            17.03.1.ce-1.el7.centos            docker-ce-stable
#   docker-ce.x86_64            17.03.1.ce-1.el7.centos            @docker-ce-stable
#   docker-ce.x86_64            17.03.0.ce-1.el7.centos            docker-ce-stable
#   Available Packages
# Step2 : 安装指定版本的Docker-CE: (VERSION 例如上面的 17.03.0.ce.1-1.el7.centos)
# sudo yum -y install docker-ce-[VERSION]
# 注意：在某些版本之后，docker-ce安装出现了其他依赖包，如果安装失败的话请关注错误信息。例如 docker-ce 17.03 之后，需要先安装 docker-ce-selinux。
# yum list docker-ce-selinux- --showduplicates | sort -r
# sudo yum -y install docker-ce-selinux-[VERSION]

# 通过经典网络、VPC网络内网安装时，用以下命令替换Step 2中的命令
# 经典网络：
# sudo yum-config-manager --add-repo http://mirrors.aliyuncs.com/docker-ce/linux/centos/docker-ce.repo
# VPC网络：
# sudo yum-config-manager --add-repo http://mirrors.could.aliyuncs.com/docker-ce/linux/centos/docker-ce.repo

2. 安装校验：

## root@iZbp12adskpuoxodbkqzjfZ:$ docker version
Client:
 Version:      17.03.0-ce
 API version:  1.26
 Go version:   go1.7.5
 Git commit:   3a232c8
 Built:        Tue Feb 28 07:52:04 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.03.0-ce
 API version:  1.26 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   3a232c8
 Built:        Tue Feb 28 07:52:04 2017
 OS/Arch:      linux/amd64
 Experimental: false

3. 启动docker

# systemctl start docker

4. 验证是否启动成功

# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2020-04-21 11:03:31 CST; 12s ago
Docs: https://docs.docker.com
Main PID: 26881 (dockerd)
Tasks: 8
Memory: 44.2M
CGroup: /system.slice/docker.service
└─26881 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.210783594+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245042409+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245058243+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245182968+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.438653606+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.538643715+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.572098105+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.572175487+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.602035014+08:00" l>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ systemd[1]: Started Docker Application Container Engine.
lines 1-20/20 (END)...skipping...
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2020-04-21 11:03:31 CST; 12s ago
Docs: https://docs.docker.com
Main PID: 26881 (dockerd)
Tasks: 8
Memory: 44.2M
CGroup: /system.slice/docker.service
└─26881 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.210783594+08:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245042409+08:00" level=warning msg="Your kernel does not support cgroup blkio weight"
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245058243+08:00" level=warning msg="Your kernel does not support cgroup blkio weight_device"
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.245182968+08:00" level=info msg="Loading containers: start."
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.438653606+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.18.0.0/16. Daem>
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.538643715+08:00" level=info msg="Loading containers: done."
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.572098105+08:00" level=info msg="Docker daemon" commit=afacb8b graphdriver(s)=overlay2 version=19.03.8
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.572175487+08:00" level=info msg="Daemon has completed initialization"
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ dockerd[26881]: time="2020-04-21T11:03:31.602035014+08:00" level=info msg="API listen on /var/run/docker.sock"
Apr 21 11:03:31 iZ2zegv3fqp39q39ghg94vZ systemd[1]: Started Docker Application Container Engine.