解决centos7和docker1.9没有配置文件问题
http://www.itnpc.com/news/web/145083113731628.html如果没有/etc/sysconfig/docker这个配置文件
1.vim/lib/systemd/system/docker.service
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target docker.socket
Requires=docker.socket
Type=notify
EnvironmentFile=/etc/sysconfig/docker
ExecStart=/usr/bin/dockerd $OPTIONS
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
MountFlags=slave
WantedBy=multi-user.target
或：
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target
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
EnvironmentFile=/etc/sysconfig/docker
ExecStart=/usr/bin/dockerd $OPTIONS
#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
WantedBy=multi-user.target
2.vim /etc/sysconfig/docker
# /etc/sysconfig/docker# Modify these options if you want to change the way the docker daemon runs
OPTIONS='-H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock'
DOCKER_CERT_PATH=/etc/docker
# If you want to add your own registry to be used for docker search and docker
# pull use the ADD_REGISTRY option to list a set of registries, each prepended
# with --add-registry flag. The first registry added will be the first registry
# searched.
# ADD_REGISTRY='--add-registry registry.access.redhat.com'
# If you want to block registries from being used, uncomment the BLOCK_REGISTRY
# option and give it a set of registries, each prepended with --block-registry
# flag. For example adding docker.io will stop users from downloading images
# from docker.io
# BLOCK_REGISTRY='--block-registry'
# If you have a registry secured with https but do not have proper certs
# distributed, you can tell docker to not look for full authorization by
# adding the registry to the INSECURE_REGISTRY line and uncommenting it.
INSECURE_REGISTRY='--insecure-registry dl.dockerpool.com:5000'
# On an SELinux system, if you remove the --selinux-enabled option, you
# also need to turn on the docker_transition_unconfined boolean.
# setsebool -P docker_transition_unconfined 1
# Location used for temporary files, such as those created by
# docker load and build operations. Default is /var/lib/docker/tmp
# Can be overriden by setting the following environment variable.
# DOCKER_TMPDIR=/var/tmp
# Controls the /etc/cron.daily/docker-logrotate cron job status.
# To disable, uncomment the line below.
# LOGROTATE=false3.重启docker
systemctl daemon-reload
systemctl restart docker
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