11:58 p.m.
Hello all,
Following this report below, I did a reboot. Now I have a real question.
I added the VG, LV and mount point to this node using the port 9090 web
interface.
Now the volume group isn't active and will not mount, causing the boot
to hang.
I am able to do "vgchange -ay data" and then a manual mount in rescue mode.
Any feedback on the best way to add a new volume group to an empty
partition (sdb) would be appreciated. Prior to using the web interface,
I was having failures using the manual tools to /dev/sdb with an error
"device /dev/sdb excluded by filter" which I suspect is related.
Thanks
Matt
On 09/04/2018 01:23 PM, Matt Simonsen wrote:
Hello,
I'm running oVirt with several data centers, some with NFS storage and
some with local storage.
I had problems in the past with a large pool and local storage. The
problem was nodectl showed the pool being too full (I think >80%), but
it was only the images that made the pool "full" -- and this storage
was carefully setup such that there was no chance it would actually
fill. The LVs for oVirt itself were all under 20%, yet nodectl still
reported the pool was too full.
My solution so far has been to use our RAID card tools, so that sda is
the oVirt node install, and sdb is for images. There are probably
other good reasons for me to handle it this way, for example being
able to use different RAID levels, but I'm hoping someone can confirm
my partitioning below doesn't have some risk I'm now yet aware of.
I setup a new volume group for images, as below:
[root@node4-g8-h4 multipath]# pvs
PV VG Fmt Attr PSize
PFree
/dev/mapper/3600508b1001c7e172160824d7b204c3b2 onn_node4-g8-h4 lvm2
a-- <119.00g <22.85g
/dev/sdb1 data lvm2 a-- 1.13t
<361.30g
[root@node4-g8-h4 multipath]# vgs
VG #PV #LV #SN Attr VSize VFree
data 1 1 0 wz--n- 1.13t <361.30g
onn_node4-g8-h4 1 13 0 wz--n- <119.00g <22.85g
[root@node4-g8-h4 multipath]# lvs
LV VG Attr LSize
Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
images_main data -wi-ao---- 800.00g
home onn_node4-g8-h4 Vwi-aotz--
1.00g pool00 4.79
ovirt-node-ng-4.2.5.1-0.20180816.0 onn_node4-g8-h4 Vwi---tz-k
64.10g pool00 root
ovirt-node-ng-4.2.5.1-0.20180816.0+1 onn_node4-g8-h4 Vwi---tz--
64.10g pool00 ovirt-node-ng-4.2.5.1-0.20180816.0
ovirt-node-ng-4.2.6-0.20180903.0 onn_node4-g8-h4 Vri---tz-k
64.10g pool00
ovirt-node-ng-4.2.6-0.20180903.0+1 onn_node4-g8-h4 Vwi-aotz--
64.10g pool00 ovirt-node-ng-4.2.6-0.20180903.0 4.83
pool00 onn_node4-g8-h4 twi-aotz--
91.10g 8.94 0.49
root onn_node4-g8-h4 Vwi---tz--
64.10g pool00
swap onn_node4-g8-h4 -wi-ao---- 4.00g
tmp onn_node4-g8-h4 Vwi-aotz--
1.00g pool00 4.87
var onn_node4-g8-h4 Vwi-aotz--
15.00g pool00 3.31
var_crash onn_node4-g8-h4 Vwi-aotz--
10.00g pool00 2.86
var_log onn_node4-g8-h4 Vwi-aotz--
8.00g pool00 3.57
var_log_audit onn_node4-g8-h4 Vwi-aotz--
2.00g pool00 4.89
The images_main is setup as "Block device for filesystems" with ext4.
Is there any reason I should consider pool for thinly provisioned
volumes? I don't need to over-allocate storage and it seems to me
like a fixed partition is ideal. Please confirm or let me know if
there's anything else I should consider.
Thanks
Matt
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