docker默认通讯方式只支持本地形式调用，不支持TCP远程，如何增加docker支持通过TCP方式管理docker，可通过配置文件形式，各个版本的方式配置不同，以下会针对某一个版本进行演示。
使用说明
演示版本
[root@test1 docker]# docker --version
Docker version 17.06.0-ce, build 02c1d87- 1
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演示系统Centos7
[root@test1 docker]# uname -a
Linux test1 3.10.0-514.21.2.el7.x86_64 #1 SMP Tue Jun 20 12:24:47 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux- 1
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配置
cat /lib/systemd/system/docker.service- 1
[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
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- 1
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将以上配置中的
ExecStart=/usr/bin/dockerd- 1
修改为
ExecStart=/usr/bin/dockerd -H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375- 1
重启docker网络
systemctl daemon-reload - 1
重启docker服务
systemctl restart docker- 1
即可进行本地或远程API调用