centos7下docker的安装

背景

总结下docker的一些知识

docker安装（有网络版）

参考文章我以前试过这个帖子，建议安装高版本的docker，（20以上的，不然可能会有一些问题）

## 1、安装依赖
[root@iZo7e61fz42ik0Z ~]#yum install -y yum-utils device-mapper-persistent-data lvm2
## 2、添加docker软件源
[root@iZo7e61fz42ik0Z ~]#yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
## 3、只保留稳定版本
[root@iZo7e61fz42ik0Z ~]#yum-config-manager --disable docker-ce-edge
[root@iZo7e61fz42ik0Z ~]#yum-config-manager --disable docker-ce-test
## 4、更新包索引
[root@iZo7e61fz42ik0Z ~]#yum makecache fast
## 5、更新yum包索引
[root@iZo7e61fz42ik0Z ~]#yum list docker-ce --showduplicates|sort -r
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
Installed Packages
docker-ce.x86_64            3:18.09.0-3.el7                    docker-ce-stable
docker-ce.x86_64            18.06.1.ce-3.el7                   docker-ce-stable
docker-ce.x86_64            18.06.1.ce-3.el7                   @docker-ce-stable
docker-ce.x86_64            18.06.0.ce-3.el7                   docker-ce-stable
docker-ce.x86_64            18.03.1.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            18.03.0.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.12.1.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.12.0.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.09.1.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.09.0.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.06.2.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.06.1.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.06.0.ce-1.el7.centos            docker-ce-stable
docker-ce.x86_64            17.03.3.ce-1.el7                   docker-ce-stable
docker-ce.x86_64            17.03.2.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
# 安装指定版本
[root@iZo7e61fz42ik0Z ~]#yum -y install docker-ce-18.06.1.ce

Docker安装完毕，启动Docker服务查看一下版本

# 启动docker
[root@iZo7e61fz42ik0Z ~]#systemctl start docker
# 开机自启
[root@iZo7e61fz42ik0Z ~]#systemctl enable docker
# 查看版本
[root@iZo7e61fz42ik0Z ~]# docker version
Client:
 Version:           18.06.1-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        e68fc7a
 Built:             Tue Aug 21 17:23:03 2018
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.1-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       e68fc7a
  Built:            Tue Aug 21 17:25:29 2018
  OS/Arch:          linux/amd64
  Experimental:     false

docker安装（无网络版）

• 提前下载docker，下载docker的安装文件：https://download.docker.com/linux/static/stable/x86_64/
• 开始安装

docker  安装，这里我下载的19.03.9，后续就出现了一些端口安全的问题
#   解压docker 安装包
tar -zxvf docker-19.03.9.tgz
#  解压文件移动到到 /usr/bin
mv docker/* /usr/bin/ 
# 配置docker.service 文件
cd /etc/systemd/system/
# 把离线部署里的docker.service文件传到这个目录
可以使用sftp，或者rz命令   
# 赋予执行权限
chmod +x /etc/systemd/system/docker.service     
# 重新加载配置文件
systemctl daemon-reload
# 开机自启
systemctl enable docker.service                                          
# 启动docker
systemctl start docker   
#查看docker版本
 docker -v        

• docker.service文件

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
  
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
ExecReload=/bin/kill -s HUP
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
  
[Install]
WantedBy=multi-user.target