CentOS 下修改 Devicemapper 存储驱动为 Direct-lvm 模式

sudo systemctl stop docker

RHEL / CentOS的：device-mapper-persistent-data，lvm2，和所有的依赖

sudo pvcreate /dev/sdb

sudo vgcreate dockervg /dev/sdb

sudo lvcreate --wipesignatures y -n data dockervg -L 35Gsudo lvcreate --wipesignatures y -n metadata dockervg -L 1G

sudo lvconvert -y --zero n -c 512K --thinpool dockervg/data --poolmetadata dockervg/metadata

cat>>/etc/lvm/profile/dockervg-data.profile<<EOFactivation {   thin_pool_autoextend_threshold=80   thin_pool_autoextend_percent=20}EOF

sudo lvcreate --wipesignatures y -n dockerdir dockervg -l+100%FREE

lvchange --metadataprofile dockervg-data dockervg/data

lvs -o+seg_monitor

mkfs -t xfs /dev/dockervg/dockerdirmkdir /var/lib/dockermount/dev/dockervg/dockerdir/var/lib/docker
cat>> /etc/fstab <<EOF/dev/dockervg/dockerdir /var/lib/docker xfs defaults 0 0EOF

sudo pvdisplay |grep dockerPV Name               /dev/sdbVG Name               docker

sudo vgextend docker /dev/sdcinfo: Physical volume "/dev/sdc" successfully created.info: Volume group "docker" successfully extended

sudo lvextend -l+100%FREE  -n docker/dockerresize2fs /dev/docker/docker-l+100%FREE: 表示使用全部空闲空间，改为-L 10G指定扩展大小；-n docker/thinpool: 指定逻辑卷名(卷组/逻辑卷名)

# LV扩容重启后，可能会出现“Non existing device" 的提示，需要对LV卷进行激活操作:
sudo lvchange -ay docker/thinpool