預設情況下，Docker只允許通過unix socket通訊操作Docker daemon，但有時我們想通過HTTP呼叫其Rest API，需單獨配置啟動引數

為了使配置永久生效，在Ubuntu環境下修改其配置檔案/etc/default/docker，加入DOCKER_OPTS="-H=unix:///var/run/docker.sock -H=0.0.0.0:6732"，重啟Docker服務，可通過瀏覽器訪問設定主機：埠號（6372）/ Docker API操作Docker，後續會補充基於API如何做一個簡單的管理工具，先來一張雛形圖

# Docker Upstart and SysVinit configuration file

# Customize location of Docker binary (especially for development testing).
#DOCKER="/usr/local/bin/docker"

# Use DOCKER_OPTS to modify the daemon startup options.
#DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"
DOCKER_OPTS="-H=unix:///var/run/docker.sock -H=0.0.0.0:6732"
# If you need Docker to use an HTTP proxy, it can also be specified here.
#export http_proxy="http://127.0.0.1:3128/"

# This is also a handy place to tweak where Docker's temporary files go.
#export TMPDIR="/mnt/bigdrive/docker-tmp"