11:30 p.m.
First of all you diddn't 'mkfs.xfs -i size=512' . You just 'mkfs.xfs'
, whis is not good and could have caused your VM problems. Also , check with xfs_info the
isize of the FS.
You have to find the uuid of the disks of the affected VM.Then go to the removed host,and
find that file -> this is the so called shard1.Then you need to find the gfid of the
file.The easiest way is to go to the "dead" cluster and find the hard links in
the .gluster directory.
Something like this:
ssh old host (the one specified in the remove-brick)cd
/gluster_bricks/data/data/<storage uuid>/images/<disk uuid>ls -li <disk
name> -> take the first numberfind /gluster_bricks/data/data -inum <number from
ls>
It should show you both the file and the gfid.
Then copy the file from images/<disk uuid>/file.Go to
/gluster_bricks/data/data/.shardList all files of:
ls -l <gfid string from find>.*
These are your shards. Just cat first file + shards (in the number order) into another
file.
This should be your VM disk.
Best Regards,Strahil Nikolov
On Tue, Aug 3, 2021 at 12:58, David White via Users<users(a)ovirt.org> wrote: Hi
Patrick,
This would be amazing, if possible.
Checking /gluster_bricks/data/data on the host where I've removed (but not replaced)
the bricks, I see a single directory.
When I go into that directory, I see two directories:
dom_md
images
If I go into the images directory, I think I see the hash folders that you're
referring to, and inside each of those, I see the 3 files you referenced.
Unfortunately, those files clearly don't have all of the data.
The parent folder for all of the hash folders is only 687M.
[root@cha1-storage data]# du -skh *
687M 31366488-d845-445b-b371-e059bf71f34f
And the "iso" files are small. The one I'm looking at now is only 19M.
It appears that most of the actual data is located in
/gluster_bricks/data/data/.glusterfs, and all of those folders are totally random,
incomprehensible directories that I'm not sure how to understand.
Perhaps you were on an older version of Gluster, and the actual data hierarchy is
different?
I don't know. But I do see the 3 files you referenced, so that's a start, even if
they are nowhere near the correct size.
Sent with ProtonMail Secure Email.
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, August 3rd, 2021 at 1:49 AM, Patrick Lomakin <patrick.lomakin(a)gmail.com>
wrote:
Greetings, I once wondered how data is stored between replicated
bricks. Specifically, how disks are stored on the storage domain in Gluster. I checked a
mounted brick via the standard path (path may be different) /gluster/data/data and saw
many directories there. Maybe the hierarchy is different, can't check now. But in the
end I got a list of directories. Each directory name is a disk image hash. After going to
a directory such as /HASH there were 3 files. The first is a disk in raw/iso/qcow2 format
(but the file has no extension, I looked at the size) the other two files are the
configuration and metadata. I downloaded the disk image file (.iso) to my computer via the
curl command and service www.station307.com (no ads). And I got the original .iso which
uploaded to the storage domain through the hosted engine interface. Maybe this way you can
download the disk image to your computer and then load it via the GUI and connect it to a
virtual machine. Good luck!
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