[CentOS] LVM lvresize/lvextend requires some space in /etc to grow a logical volume?
Stefan Held
obi at unixkiste.org
Tue Sep 20 01:38:00 UTC 2011
Am Montag, den 19.09.2011, 19:15 -0400 schrieb Johnny Tan:
> Anyway, here's the real issue with LVM, at least in CentOS-6:
>
You would deal with the same issues in older lvm versions.
> [root at jttest ~]# df
> Filesystem 1K-blocks Used Available Use% Mounted on
> /dev/mapper/vg_main-lv_root
> 1548144 1548144 0 100% /
>
Do i read that correctly and 1548144 1K Blocks are about 1,5G of Root
File System? Please tell me you have a seperated /var for log files.
If not, for production use, install a tool which gives you a warning
when reaching the 5% Level.
> [root at jttest ~]# lvextend -L 2G /dev/vg_main/lv_root
> /etc/lvm/archive/.lvm_jttest.pp.local_5523_51321310: write error
> failed: No space left on device
> Volume group "vg_main" metadata archive failed.
> /etc/lvm/cache/.cache.tmp: write error failed: No space left on device
>
> So I can't extend a logical volume if there's no space in /etc?
lvm tries to be helpfull if you ran into a power failure and can then
recover due his tmp files in /etc.
> Granted, I only need to delete like 2k worth of files in the same
> logical volume as /etc to make the above work, but I don't recall
> lvresize or lvextend requiring space in /etc to do a resize. Has this
> always been the case? I don't have any 5.x servers handy to test this
> with. Can anyone verify?
>
You will have the same problem, i think this procedure is the same in
all lvm2 versions, which seems a long time now.
> If this is new, this seems less-than-ideal. /etc itself rarely fills
> up, so, in theory, I could make it its own LV, but that's even less
> ideal. For now, I'll stick to deleting just enough to do the
> extend/resize.
>
This is why the older unix guys always seperate stuff from / which could
fill up the root file system. ;)
--
Stefan Held VI has only 2 Modes:
obi unixkiste org The first one is for beeping all the time,
FreeNode: foo_bar the second destroys the text.
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