重启服务器之后，Autodl的目录限额失效，附解决方案-马春杰杰

1、同一个磁盘，被挂载到多个路径

比如autodl-202-2这个容器，/dev/sda是挂载到宿主机的/autodl2下，而/autodl2则被挂载到autodl-202-2容器的多个路径：/disk和/autodl-share-tmp

(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device show autodl-202-2
gpu:
  type: gpu
sda:
  path: /dev/sda
  type: unix-block
sharedisk:
  path: /disk
  source: /autodl2/lxd-autodl2
  type: disk
tmpdisk:
  path: /autodl-share-tmp
  source: /autodl2/autodl-share-tmp
  type: disk

(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device show autodl-202-2

gpu:

type: gpu

sda:

path: /dev/sda

type: unix-block

sharedisk:

path: /disk

source: /autodl2/lxd-autodl2

type: disk

tmpdisk:

path: /autodl-share-tmp

source: /autodl2/autodl-share-tmp

type: disk

这就会导致一个问题，就是project quota同时只会被其中一个路径启用，所以我们期望的/disk未能启用，而/autodl-share-tmp则启用了，可以通过下面这个命令来确认：

root@autodl-202-2:~# sudo quotaon /dev/sda
quotaon: using . on /dev/sda [/autodl-share-tmp]: File exists

1 2	root@autodl-202-2:~# sudo quotaon /dev/sda quotaon: using . on /dev/sda [/autodl-share-tmp]: File exists

恢复方法也比较简单，在宿主机上先卸载/autodl-share-tmp再挂载即可：

lxc config device remove autodl-202-2 tmpdisk
lxc config device add autodl-202-2 tmpdisk disk source=/autodl2/autodl-share-tmp path=/autodl-share-tmp

1 2	lxc config device remove autodl-202-2 tmpdisk lxc config device add autodl-202-2 tmpdisk disk source=/autodl2/autodl-share-tmp path=/autodl-share-tmp

2、unix-block挂载的磁盘错误

这种情况比价少见，多见于服务器新增磁盘的情况。比如我们今天就是新增了一块磁盘，结果导致原本的/disk是/dev/sdc，结果变成了/dev/sdd，所以自然无法启用限额。

(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device show autodl-202-4
gpu:
  type: gpu
sdc:
  path: /dev/sdc
  type: unix-block
sharedisk:
  path: /disk
  source: /disk/lxd-autodl4
  type: disk
tmpdisk:
  path: /autodl-share-tmp
  source: /autodl2/autodl-share-tmp
  type: disk
(base) mcj@SDAI202-PowerEdge-T630:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            26G  3.5M   26G   1% /run
/dev/sdc2       187G   75G  103G  43% /
tmpfs           126G     0  126G   0% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
efivarfs        304K  214K   85K  72% /sys/firmware/efi/efivars
/dev/sdc3       691G  544G  112G  83% /home
/dev/sdc1       487M  6.1M  480M   2% /boot/efi
/dev/sdd        3.6T  3.2T  252G  93% /disk
/dev/sde1       7.3T  5.9T 1006G  86% /disk1
/dev/sda        5.5T  942G  4.3T  18% /autodl2
tmpfs           1.0M     0  1.0M   0% /var/snap/lxd/common/ns
tmpfs            26G   60K   26G   1% /run/user/1000
tmpfs            26G   64K   26G   1% /run/user/1017
tmpfs            26G   68K   26G   1% /run/user/1013
tmpfs            26G   64K   26G   1% /run/user/1010

(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device show autodl-202-4

gpu:

type: gpu

sdc:

path: /dev/sdc

type: unix-block

sharedisk:

path: /disk

source: /disk/lxd-autodl4

type: disk

tmpdisk:

path: /autodl-share-tmp

source: /autodl2/autodl-share-tmp

type: disk

(base) mcj@SDAI202-PowerEdge-T630:~$ df -h

Filesystem Size Used Avail Use% Mounted on

tmpfs 26G 3.5M 26G 1% /run

/dev/sdc2 187G 75G 103G 43% /

tmpfs 126G 0 126G 0% /dev/shm

tmpfs 5.0M 4.0K 5.0M 1% /run/lock

efivarfs 304K 214K 85K 72% /sys/firmware/efi/efivars

/dev/sdc3 691G 544G 112G 83% /home

/dev/sdc1 487M 6.1M 480M 2% /boot/efi

/dev/sdd 3.6T 3.2T 252G 93% /disk

/dev/sde1 7.3T 5.9T 1006G 86% /disk1

/dev/sda 5.5T 942G 4.3T 18% /autodl2

tmpfs 1.0M 0 1.0M 0% /var/snap/lxd/common/ns

tmpfs 26G 60K 26G 1% /run/user/1000

tmpfs 26G 64K 26G 1% /run/user/1017

tmpfs 26G 68K 26G 1% /run/user/1013

tmpfs 26G 64K 26G 1% /run/user/1010

这种情况恢复起来也很简单，只需要先卸载sdc，再挂载sdd即可。

(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device remove autodl-202-4 sdc
Device sdc removed from autodl-202-4
(base) mcj@SDAI202-PowerEdge-T630:~$ lxc config device add autodl-202-4 sdd unix-block path=/dev/sdd
Device sdd added to autodl-202-4
(base) mcj@SDAI202-PowerEdge-T630:~$ lxc exec autodl-202-4 -- quotaon -Ppv /disk
project quota on /disk (/dev/sdd) is on (enforced)
(base) mcj@SDAI202-PowerEdge-T630:~$