centos7-linux安装docker（离线⽅式）1. 下载docker的安装⽂件
下载的是：docker-18. 这个压缩⽂件
2. 将docker-18.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-18.
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=docs.docker
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.
linux离线安装nginx详细教程#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。
12. 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": ["163"]}
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

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