离线安装docker，且开放tcp2375

0、环境

因某些环境，不能联外网，所以使用docker yum源方法行不通，于是打算离线安装。

环境：contos7.4(内核需为3.10+)

# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

下载地址：https://download.docker.com/linux/static/stable/x86_64/

 

1、安装

1）setup

cd /usr/local/resource/docker

tar -xf docker-18.06.3-ce.tar

mv /usr/local/resource/docker/docker/*  /usr/bin/ # 将二进制文件移动到/user/bin，它是环境变量目录，在路径下都可以运行docker命令

2）systemd docker.service

vim /etc/systemd/system/docker.service

然后将以下内容粘贴进去：

 

[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 $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

 

授予执行权限：

chmod +x /etc/systemd/system/docker.service

然后：

systemctl daemon-reload   # 重载systemd下 xxx.service文件

systemctl start docker       # 启动Docker

systemctl enable docker.service   # 设置开机自启

测试是否成功：

systemctl status docker   # 查看Docker状态

# docker -v   # 查看Docker版本

Docker version 20.10.9, build c2ea9bc

3）开放tcp2375

因为编辑了vim /etc/systemd/system/docker.service的ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock，它默认开放了docker的2375，我们在浏览器输入http://IP:2375/version得到页面则表示我们配置一切正确