Le 02/03/2015 22:00, Devon B. a écrit :
I couldn't figure out how to allow user/group quotas inside the
container and I couldn't find many resources other than failed
attempts or unresolved reports.
I received the same error as you and tried making a fake device using
mknod to no avail. The problem is that the rootfs (/) is always only
mounted as (rw). So then it tries to fall back to the other / in
/proc/mounts which is the block device which isn't available in the
container (for good reason probably).
I think the only possible way I had seen that quotas had worked was
using a bind mount from the container to a host mount with usrquota
enabled. However, in my case, this did not seem appealing because I
would have to maintain two filesystems for each container (rootfs and
the usrquota) and from what I remember, the users/groups had to
coexist on the host and the container so it would only be viable on
one container.
PONCET Anthony <mailto:[email protected]>
Monday, March 2, 2015 12:13 PM
Hi,
I know lxc doesn't manage or use quota, but how to used it in one
container?
I created one lv for my container, and I mounted with usrquota and
grpquota options.
But when I try to used quotacheck or quotaon (in my container), I
have an error : "impossible to use stat() on
/dev/mapper/vg_name-lv_name, file doesn't exist ".
Do you have an idea?
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Hi,
I found how to can enable quota.
1) Stop your container and edit the config file and add
"lxc.cgroup.devices.allow = b 252:x rwm".
2) Add usrquota,grpquota options in fstab from rootfs container raw IE:
"uuid=.... /path/of/your/container/rootfs fs_type
defaults,usrquota,grpquota 0 2".
3) After mounting lv in rootfs of your container with "sudo mount -a",
make (in container) a nod with "sudo mknod -m 660 /dev/dm-x 252 x" (dm-x
= path of your lv and x = minor id of your peripheral lv (ls -l /dev/dm-x)).
4) Always in container, "sudo mkdir /dev/mapper && cd /dev/mapper &&
sudo ln -s ../dm-x vg_name-lv_name && sudo touch /aquota.user && sudo
touch /aquota.group && sudo chmod 600 /aquota.* && sudo quotacheck -augv".
5) On the host, enable quota with : "sudo quotaon -ugv
/path/of/your/container/rootfs/".
But, now, when I try to set quota with quotatool or edquota -u user (in
the container), I had an error : "edquota: Unable to get the quotas
kernel to user 101001 /dev/mapper/vg_name-lv_name: Operation not permitted
edquota: Error trying quota /dev/mapper/vg_name-lv_name #101001 (101001
id): Operation not permitted
edquota: Impossibble retrieve quota information for 101,001 users.
"
Can I add a capabilities to allow this access? Or an other track?
Thanks.
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