原因: 数据盘挂载未使用uuid,重启后数据盘盘符随机变更,挂载无法识别盘符,而导致重启失败
先将启动故障的机器关机
控制台关机故障机器
卸载故障机器系统盘,挂载到一台临时机上
· 将故障机系统盘卸载,重新作为数据盘挂载到同可用区的新机器上
· 如果没有同可用区机,可临时按需申请一台低配,使用后删除
#系统查看故障系统盘是否已被识别
#fdisk -l
...
Disk /dev/vdc: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000cec4e
Device Boot Start End Blocks Id System
/dev/vdc1 * 2048 83886046 41941999+ 83 Linux
#创建临时挂载目录
#mkdir /mnt/test
#临时机器上挂载上故障机系统盘
# mount -t xfs -o rw /dev/vdc1 /mnt/test
注释fastab数据盘挂载项
#注释数据盘挂载项
# vi /mnt/test/etc/fstab
...
#/dev/vdb /disk/ssd xfs defaults,noatime,x-systemd.device-timeout=1000 0 0
#系统卸载故障系统盘
# umount /mnt/test
#云厂控制台,临时机卸载掉故障机系统盘
重新挂载故障机系统盘
将故障机系统盘配置注释后,重新挂载到故障机
#启动主机,查看数据盘uuid
# blkid
/dev/vda1: UUID="207b19exxxxxxxxxx-9098af381e72" TYPE="ext4"
/dev/vdb: UUID="9516f0exxxxxxxxxx-c0055474af43" TYPE="xfs"
#修改数据盘挂载为uuid方式
# vi /etc/fstab
...
UUID="9516f0exxxxxxxxxx-c0055474af43" /disk/ssd xfs defaults,noatime,x-systemd.device-timeout=1000 0 0
#挂载重新挂载磁盘
# mount -a
#如果扩容磁盘空间升级
# growpart /dev/vda 2
# xfs_growfs /dev/vda2
CentOS7单用户重置密码
#参看文档
https://support.huaweicloud.com/trouble-ecs/ecs_trouble_0312.html#ecs_trouble_0312__section7789402115