查看默认docker文件系统引擎信息
[root@client ~]# docker info
Containers: 19
Running: 16
Paused: 0
Stopped: 3
Images: 18
Server Version: 1.12.6
Storage Driver: devicemapper #默认为devicemapper
停止docker服务
[root@docker ~]# service docker stop
Redirecting to /bin/systemctl stop docker.service
将OverlayFS加到module目录下
echo "overlay" > /etc/modules-load.d/overlay.conf
reboot系统
确认overlay生效
[root@docker ~]# lsmod |grep over
overlay 37831 0
配置Docker Daemon用OverlayFS启动
[root@docker ~]# vi /etc/systemd/system/docker.service.d/override.conf
[Service]
ExecStart=
ExecStart=/usr/bin/docker daemon --storage-driver=overlay
启动Docker daemon
[root@docker ~]# systemctl daemon-reload
[root@docker ~]# service docker start
Redirecting to /bin/systemctl start docker.service
查看修改后的文件系统引擎信息
[root@docker ~]# docker info |grep overlay
Storage Driver: overlay