修改docker默认储存目录

docker镜像默认存储路径在  /var/lib/docker/ 下 ，在实际部署中，经常碰到客户的 / 分区只给到20g  , 甚至更小，而我们的每个镜像又达到1G ,这就需要我们在部署的时候根据磁盘空间合理选择存储目录。

在ExecStart 后面加上参数如下，将docker的默认存储目录改至 /app/dockers 目录下  

   --graph /app/dockers

systemctl restart docker.service    重启docker 服务后生效

 

cat  /lib/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

After=network.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 $DOCKER_OPTS --insecure-registry=docker.zhixueyun.com:5000 --graph /app/dockers

ExecReload=/bin/kill -s HUP $MAINPID

EnvironmentFile=-/etc/default/docker

 

# 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

[Install]

WantedBy=multi-user.target