On Wed, 24 Jul 2019 at 22:12, Matthew Benstead <matthewb@xxxxxxx> wrote:
So looking more closely at the trusted.glusterfs.dht attributes from the bricks it looks like they cover the entire range... and there is no range left for gluster07.
The first 6 bricks range from 0x00000000 to 0xffffffff - so... is there a way to re-calculate what the dht values should be? Each of the bricks should have a gap
Gluster05 00000000 -> 2aaaaaa9
Gluster06 2aaaaaaa -> 55555553
Gluster01 55555554 -> 7ffffffd
Gluster02 7ffffffe -> aaaaaaa7
Gluster03 aaaaaaa8 -> d5555551
Gluster04 d5555552 -> ffffffff
Gluster07 None
If we split the range into 7 servers that would be a gap of about 0x24924924 for each server.
Now in terms of the gluster07 brick, about 2 years ago the RAID array the brick was stored on became corrupted. I ran the remove-brick force command, then provisioned a new server, ran the add-brick command and then restored the missing files from backup by copying them back to the main gluster mount (not the brick).
Did you run a rebalance after performing the add-brick? Without a rebalance/fix-layout , the layout for existing directories on the volume will not be updated to use the new brick as well.
That the layout does not include the new brick in the root dir is in itself is not a problem. Do you create a lot of files directly in the root of the volume? If yes, you might want to run a rebalance. Otherwise, if you mostly create files in newly added directories, you can probably ignore this. You can check the layout for directories on the volume and see if they incorporate the brick7.
I would expect a lookup on the root to have set an xattr on the brick with an empty layout range . The fact that the xattr does not exist at all on the brick is what I am looking into.
It looks like prior to that event this was the layout - which would make sense given the equal size of the 7 bricks:
gluster02.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x000000010000000048bfff206d1ffe5f
gluster05.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000b5dffce0da3ffc1f
gluster04.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000917ffda0b5dffcdf
gluster03.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x00000001000000006d1ffe60917ffd9f
gluster01.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000245fffe048bfff1f
gluster07.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x000000010000000000000000245fffdf
gluster06.pcic.uvic.ca | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000da3ffc20ffffffff
Which yields the following:
00000000 -> 245fffdf Gluster07
245fffe0 -> 48bfff1f Gluster01
48bfff20 -> 6d1ffe5f Gluster02
6d1ffe60 -> 917ffd9f Gluster03
917ffda0 -> b5dffcdf Gluster04
b5dffce0 -> da3ffc1f Gluster05
da3ffc20 -> ffffffff Gluster06
Is there some way to get back to this?
Thanks,
-Matthew
--
Matthew Benstead
System Administrator
Pacific Climate Impacts Consortium
University of Victoria, UH1
PO Box 1800, STN CSC
Victoria, BC, V8W 2Y2
Phone: +1-250-721-8432
Email: matthewb@xxxxxxxOn 7/18/19 7:20 AM, Matthew Benstead wrote:
Hi Nithya,
No - it was added about a year and a half ago. I have tried re-mounting the volume on the server, but it didn't add the attr:
[root@gluster07 ~]# umount /storage/
[root@gluster07 ~]# cat /etc/fstab | grep "/storage"
10.0.231.56:/storage /storage glusterfs defaults,log-level=WARNING,backupvolfile-server=10.0.231.51 0 0
[root@gluster07 ~]# mount /storage/
[root@gluster07 ~]# df -h /storage/
Filesystem Size Used Avail Use% Mounted on
10.0.231.56:/storage 255T 194T 62T 77% /storage
[root@gluster07 ~]# getfattr --absolute-names -m . -d -e hex /mnt/raid6-storage/storage/
# file: /mnt/raid6-storage/storage/
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a756e6c6162656c65645f743a733000
trusted.gfid=0x00000000000000000000000000000001
trusted.glusterfs.6f95525a-94d7-4174-bac4-e1a18fe010a2.xtime=0x5d307baa00023ec0
trusted.glusterfs.quota.dirty=0x3000
trusted.glusterfs.quota.size.2=0x00001b71d5279e000000000000763e32000000000005cd53
trusted.glusterfs.volume-id=0x6f95525a94d74174bac4e1a18fe010a2
Thanks,
-Matthew
On 7/17/19 10:04 PM, Nithya Balachandran wrote:
Hi Matthew,
Was this node/brick added to the volume recently? If yes, try mounting the volume on a fresh mount point - that should create the xattr on this as well.
Regards,Nithya
On Wed, 17 Jul 2019 at 21:01, Matthew Benstead <matthewb@xxxxxxx> wrote:
Hello,
I've just noticed one brick in my 7 node distribute volume is missing
the trusted.glusterfs.dht xattr...? How can I fix this?
I'm running glusterfs-5.3-2.el7.x86_64 on CentOS 7.
All of the other nodes are fine, but gluster07 from the list below does
not have the attribute.
$ ansible -i hosts gluster-servers[0:6] ... -m shell -a "getfattr -m .
--absolute-names -n trusted.glusterfs.dht -e hex
/mnt/raid6-storage/storage"
...
gluster05 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000000000002aaaaaa9
gluster03 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000aaaaaaa8d5555551
gluster04 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000d5555552ffffffff
gluster06 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x00000001000000002aaaaaaa55555553
gluster02 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x00000001000000007ffffffeaaaaaaa7
gluster07 | FAILED | rc=1 >>
/mnt/raid6-storage/storage: trusted.glusterfs.dht: No such
attributenon-zero return code
gluster01 | SUCCESS | rc=0 >>
# file: /mnt/raid6-storage/storage
trusted.glusterfs.dht=0x0000000100000000555555547ffffffd
Here are all of the attr's from the brick:
[root@gluster07 ~]# getfattr --absolute-names -m . -d -e hex
/mnt/raid6-storage/storage/
# file: /mnt/raid6-storage/storage/
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a756e6c6162656c65645f743a733000
trusted.gfid=0x00000000000000000000000000000001
trusted.glusterfs.6f95525a-94d7-4174-bac4-e1a18fe010a2.xtime=0x5d2dee800001fdf9
trusted.glusterfs.quota.dirty=0x3000
trusted.glusterfs.quota.size.2=0x00001b69498a1400000000000076332e000000000005cd03
trusted.glusterfs.volume-id=0x6f95525a94d74174bac4e1a18fe010a2
And here is the volume information:
[root@gluster07 ~]# gluster volume info storage
Volume Name: storage
Type: Distribute
Volume ID: 6f95525a-94d7-4174-bac4-e1a18fe010a2
Status: Started
Snapshot Count: 0
Number of Bricks: 7
Transport-type: tcp
Bricks:
Brick1: 10.0.231.50:/mnt/raid6-storage/storage
Brick2: 10.0.231.51:/mnt/raid6-storage/storage
Brick3: 10.0.231.52:/mnt/raid6-storage/storage
Brick4: 10.0.231.53:/mnt/raid6-storage/storage
Brick5: 10.0.231.54:/mnt/raid6-storage/storage
Brick6: 10.0.231.55:/mnt/raid6-storage/storage
Brick7: 10.0.231.56:/mnt/raid6-storage/storage
Options Reconfigured:
changelog.changelog: on
features.quota-deem-statfs: on
features.read-only: off
features.inode-quota: on
features.quota: on
performance.readdir-ahead: on
nfs.disable: on
geo-replication.indexing: on
geo-replication.ignore-pid-check: on
transport.address-family: inet
Thanks,
-Matthew
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