[Users] simfs with ploop?

[Rene C.]

Oddly enough this problem has returned - it now shows simfs again.
Nobody has explicitly changed anything. The container runs Cpanel,
could that have messed things up? It actually looks like cpanel
overrides the symlink when they add their jailshell. Have you noticed
this before?

/proc/mounts looks correct.



On Wed, Dec 18, 2013 at 10:25 AM, Rene C. <openvz at dokbua.com> wrote:
> Thanks, now I understand.
>
> So after deleting /etc/mtab I need to make as symlink from
> /proc/mounts (ln -s /proc/mounts /etc/mtab). That was the bit I was
> missing.
>
>
> On Wed, Dec 18, 2013 at 1:36 AM, Kir Kolyshkin <kir at openvz.org> wrote:
>> On 12/17/2013 12:27 AM, Rene C. wrote:
>>>
>>> Sure ....
>>>
>>> # ls -l /vza1/private/1703
>>> total 16
>>> drwxr-xr-x 2 root root 4096 Dec 15 04:10 dump
>>> drwx------ 3 root root 4096 Dec 15 04:10 root.hdd
>>> -rw-r--r-- 1 root root  443 Dec 15 04:09 Snapshots.xml
>>> -rw-r--r-- 1 root root   37 Dec 15 03:06 vzpbackup_snapshot
>>> # vzlist -o layout 1703
>>> LAYOUT
>>> ploop
>>> #
>>>
>>> Surely deleting the mount table isn't healthy, isn't it needed by
>>> something?
>>
>>
>> This is how it should look like:
>>
>> [host] # vzctl enter 1018
>> entered into CT 1018
>> [CT1018] # ls -l /etc/mtab
>> lrwxrwxrwx 1 root root 12 Nov  7 21:20 /etc/mtab -> /proc/mounts
>>
>> And /proc/mounts is showing info from the kernel which can't be wrong:
>>
>> [CT1018]# cat /proc/mounts
>> /dev/ploop51540p1 / ext4 rw,relatime,barrier=1,data=ordered,balloon_ino=12 0
>> 0
>> proc /proc proc rw,relatime 0 0
>> sysfs /sys sysfs rw,relatime 0 0
>> none /dev devtmpfs rw,relatime,mode=755 0 0
>> none /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
>> none /dev/shm tmpfs rw,relatime 0 0
>> none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
>>
>>
>>>
>>> On Tue, Dec 17, 2013 at 9:41 AM, Kir Kolyshkin <kir at openvz.org> wrote:
>>>>
>>>> On 12/16/2013 04:51 PM, Rene C. wrote:
>>>>>
>>>>> I tried just removing it, does not seem to fix anything. Need to do
>>>>> anything else? Remount, restart, anything?
>>>>
>>>>
>>>> Would be great if you can copy-paste some output from the terminal,
>>>> otherwise it's more complicated to debug.
>>>>
>>>> Maybe your CT was not really converted.
>>>>
>>>> Please show output of
>>>>
>>>> ls -l /vz/private/1703/
>>>> vzlist -o layout 1703
>>>>
>>>>
>>>> On Thu, Dec 12, 2013 at 11:43 AM, Rene C. <openvz at dokbua.com> wrote:
>>>>>>
>>>>>> Ok thanks. Just remove it, nothing else?  Need to restart the
>>>>>> container or anything?
>>>>>>
>>>>>> On Thu, Dec 12, 2013 at 10:02 AM, Kir Kolyshkin <kir at openvz.org> wrote:
>>>>>>>
>>>>>>> On 12/11/2013 06:28 PM, Rene C. wrote:
>>>>>>>>
>>>>>>>> I just noticed there is a contaner on one of our hardware nodes that
>>>>>>>> appears to have been changed to ploop, but the filesystem is still
>>>>>>>> simfs:
>>>>>>>>
>>>>>>>> # vzctl exec 1703 df -h
>>>>>>>> Filesystem            Size  Used Avail Use% Mounted on
>>>>>>>> /dev/simfs             99G   65G   29G  70% /
>>>>>>>> none                  1.0G  4.0K  1.0G   1% /dev
>>>>>>>> # vzctl convert 1703
>>>>>>>> CT is already on ploop
>>>>>>>>
>>>>>>>>
>>>>>>>> All other containers use a /dev/ploopXXXX device.
>>>>>>>>
>>>>>>>> Is this a problem? Should it be fixed? How?
>>>>>>>
>>>>>>>
>>>>>>> I guess this is caused by a record in CT's /etc/mtab. This should be
>>>>>>> harmful.
>>>>>>> If you want to fix it, just remove CT's /etc/mtab
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