修改docker默认存储目录

安装启动docker

[root@localhost docker]# yum -y install docker-ce
Installed:
  docker-ce.x86_64 3:24.0.6-1.el7                                                                                                                     

Dependency Installed:
  docker-ce-rootless-extras.x86_64 0:24.0.6-1.el7                                                                                                     

Complete!
[root@localhost docker]# systemctl enable docker --now
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

编写daemon.json配置文件在/etc/docker/目录中

[root@localhost docker]# tee /etc/docker/daemon.json <<-EOF
> {
>   "data-root": "/www/docker"
> }
> EOF
{
  "data-root": "/www/docker"
}
[root@localhost docker]# 
[root@localhost docker]# 
[root@localhost docker]# 
[root@localhost docker]# cat /etc/docker/daemon.json 
{
  "data-root": "/www/docker"
}

启动docker服务

[root@localhost docker]# systemctl daemon-reload 
[root@localhost docker]# systemctl restart docker

检查配置是否生效

[root@localhost docker]# docker info |grep -y dir:
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
 Docker Root Dir: /www/docker

配置二

# 修改docker的根目录（默认根目录为：/var/lib/docker），根据需要来确定是否要修改
# 修改根目录，只是在启动命令后增加“--graph=/data/lib/docker”

$ vim /usr/lib/systemd/system/docker.service    # 跳转到14行，修改如下
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --graph=/data/lib/docker