[Libguestfs] Can't create any VPS using KVM template due to the error with libguestfs

[Richard W.M. Jones]

On Thu, Jan 29, 2015 at 12:16:30AM +0530, Thirumalai Nambi wrote:
> Hi,
> 
> I'm using SolusVM control panel to create KVM VPS. Suddenly, I can't make
> any VPS on Host-Node. Their build log says the SolusVM can't read the
> libguestfs in server.
> 
> During the debug, I've tried to mount existing VPS using guestmount command
> and  I can't mount the KVM image.
> 
> Please check here.
> 
> [root at msv07 /]# guestmount -i -a /dev/msv07data/kvm139_img /mnt
> libguestfs: error: guestfs_launch failed.
> See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs
> and/or run 'libguestfs-test-tool'.
> [root at msv07 /]#
> 
> 
> I've attached libguestfs-test-tool output (untitled document 1) and debug
> output of guestmount command here(untitled document 2).

The error is certainly an unusual one:

mkdtemp: /tmp/lvm4zeZR5: No such file or directory

caused by this code in the daemon:

https://github.com/libguestfs/libguestfs/blob/master/daemon/lvm-filter.c#L75

It's caused by the peculiar way that you've set up /tmp on your
host:

lrwxrwxrwx    1 root root     8 Aug 27 14:48 tmp -> /backup/
drwxrwxrwt.   4 root root  4096 Aug 27 14:48 tmp-

If you really want that setup, you might try adding a line:

/backup

to /usr/lib64/guestfs/supermin.d/hostfiles.  But really the problem is
that you shouldn't make /tmp be a symbolic link.

> Please take a look and respond asap, Last time I've opened a ticket, we got
> response after one day..
> 
> Please make this hurry, I've invested whole day on this issue. But I can't
> solve it.

Heh, you get what you pay for ...

Rich.

-- 
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