centos7-linux安装docker(离线方式)

1. 下载docker的安装文件

https://download.docker.com/linux/static/stable/x86_64/

下载的是：docker-20.10.7.tgz 这个压缩文件

• 将docker-20.10.7.tgz文件上传到centos7-linux系统上，用ftp工具上传即可

• 3. 解压

  [root@localhost java]# tar -zxvf docker-20.10.7.tgz
  

  4. 将解压出来的docker文件复制到 /usr/bin/ 目录下

  [root@localhost java]# cp docker/* /usr/bin/
  

  5. 进入/etc/systemd/system/目录,并创建docker.service文件

  [root@localhost java]# cd /etc/systemd/system/
  [root@localhost system]# touch docker.service
  

  6. 打开docker.service文件,将以下内容复制

  [root@localhost system]# vi docker.service
  

  注意： --insecure-registry=192.168.200.128 此处改为你自己服务器ip

  [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 --selinux-enabled=false --insecure-registry=192.168.200.128
  ExecReload=/bin/kill -s HUP $MAINPID
  # 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
  

  7. 给docker.service文件添加执行权限

  [root@localhost system]# chmod 777 /etc/systemd/system/docker.service 
  

  8. 重新加载配置文件（每次有修改docker.service文件时都要重新加载下）

  [root@localhost system]# systemctl daemon-reload 
  

  9. 启动

  [root@localhost system]# systemctl start docker
  

  10. 设置开机启动

  [root@localhost system]# systemctl enable docker.service
  

  11. 查看docker状态

  [root@localhost system]# systemctl status docker
  

  出现下面这个界面就代表docker安装成功。

  

• 配置镜像加速器,默认是到国外拉取镜像速度慢,可以配置国内的镜像如：阿里、网易等等。下面配置一下网易的镜像加速器。打开docker的配置文件: /etc/docker/daemon.json文件：

• [root@localhost docker]# vi /etc/docker/daemon.json
  

  配置如下:

  {"registry-mirrors": ["http://hub-mirror.c.163.com"]}
  

  配置完后:wq保存配置并重启docker 一定要重启不然加速是不会生效的！！！

  [root@localhost docker]# service docker restart