[Pkg-iscsi-maintainers] Bug#498616: Unmounting LVM'd isci based filesystem

[Javier Barroso]

On 08/06/10 16:24, Ritesh Raj Sarraf wrote:
> I'm planning an upload in a day or two and I want to fix this bug. I have taken
> your patches and cooked up something.
>
> While testing, I realized that it looks like udev itself is taking care of
> activating/de-activating iscsi devices.
>
> Now I can still go ahead with the patches applied and upload it or else drop
> the patches and offload that task to udev. Comments ?
>    
If udev umount lvm devices, then it is ok (drop this patch). Maybe lvm 
maintainer knows better who should umount these _netdev devices ?

I can test your new upload and tell you if I see any issue

Thank you very much

>
> Ritesh
>
>
> On Monday 19 Jan 2009 04:30:29 Javier Barroso wrote:
>    
>> Hello,
>>
>> I have a similar patch for this issue (but the first in this bug seems
>> fine too), so I'm not attaching my patch, but yes a complementary patch.
>>
>> I think unmounting lvm filesystem is necesary. This patch, umount LVM
>> filesystem from iscsi disk:
>>
>> --- umountiscsi.sh.orig 2009-01-18 23:35:41.000000000 +0100
>> +++ umountiscsi.sh      2009-01-18 23:36:44.000000000 +0100
>> @@ -31,6 +31,16 @@
>>          done
>>       done
>>       log_end_msg 0
>> +    if [ -x /sbin/lvs ]; then
>> +           log_daemon_msg "Unmounting iscsi-backed LVM filesystems"
>> +           for DEVICE in $(mount | awk  '/_netdev/ {print $1}'); do
>> +               if lvs "$DEVICE"&>  /dev/null; then
>> +                   log_progress_msg $DEVICE
>> +                   umount $DEVICE
>> +               fi
>> +           done
>> +    fi
>> +    log_end_msg 0
>>
>> We (as debian user) have another problem with lenny and iscsi + lvm +
>> multipath (should I open another bug?). I try to explain it here:
>>
>> # pwd
>> /etc/rc6.d
>> # ls -1 *multipath* *iscsi* *lvm*
>> K20multipath-tools
>> K80umountiscsi.sh
>> K81open-iscsi
>> S50lvm
>> S50lvm2
>>
>> Suppose I have a pv in iscsi lun, and over it a vg, who has a lv.
>> So if multipath is down, how umountiscsi is capable to unmount lvm volume?
>>
>> My server hangs forever when is rebooting or shutting down. With sys+rq W
>> debian said to me there is a process lvchange who is blocked. I can read
>> in redhat issue tracker [1] about similar bug in redhat systems.
>>
>> Is it possible to "full" support lvm inside iscsi luns ?
>>
>> Any help is apreciatte.
>>
>> Thank you.
>>
>> [1] https://bugzilla.redhat.com/show_bug.cgi?id=212265
>>
>> Debian Rocks!
>>