centos 7 开启docker的2375端口

大家好，又见面了，我是你们的朋友全栈君。

首先在Centos7下安装docker，

然后修改配置文件信息，运行命令

vim /usr/lib/systemd/system/docker.service

在配置信息中找到

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:2375

在末尾加上

-H tcp://0.0.0.0:2375

如下面显示的一样

[root@localhost ~]# vim /usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
BindsTo=containerd.service
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket

[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 fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:2375
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s

# 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

# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this option.
TasksMax=infinity

# 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

[Install]

这样就设置成功了

然后在检查一下防火墙的的状态，可以在防火墙中开放该端口，也可以直接关闭防火墙

我是直接关闭防火墙的，如下

查看防火墙状态 systemctl status firewalld.service

绿的running表示防火墙开启

执行关闭命令 systemctl stop firewalld.service

再次执行查看防火墙命令 systemctl status firewalld.service

执行开机禁用防火墙自启命令 systemctl disable firewalld.service