[lustre-discuss] Odd behavior with tunefs.lustre and device index
Andreas Dilger
adilger at whamcloud.com
Wed Jan 24 17:52:13 PST 2024
This is more like a bug report and should be filed in Jira.
That said, no guarantee that someone would be able to
work on this in a timely manner.
On Jan 24, 2024, at 09:47, Backer via lustre-discuss <lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>> wrote:
Just pushing it on to the top of inbox :) Or is there any other distribution list that is more appropriate for this type of questions? I am also trying devel mailing list.
On Sun, 21 Jan 2024 at 18:34, Backer <backer.kolo at gmail.com<mailto:backer.kolo at gmail.com>> wrote:
Just to clarify. OSS-2 is completely powered off (hard power off without any graceful shutdown) before start working on OSS-3.
On Sun, 21 Jan 2024 at 12:12, Backer <backer.kolo at gmail.com<mailto:backer.kolo at gmail.com>> wrote:
Hi All,
I am seeing a behavior with tunefs.lustre. After changing the failover node and trying to mount an OST, getting getting the following error:
The target service's index is already in use. (/dev/sdd)
After the above error, and performing --writeconf once, I can repeat these steps (see below) any number of times and any OSS without --writeconf.
This is an effort to mount an OST to a new OSS. I reproduced this issue after simplifying some steps and reproducing the behavior (see below) consistently. I was wondering if anyone could help me to understand this?
[root at OSS-2 opc]# lctl list_nids
10.99.101.18 at tcp1
[root at OSS-2 opc]#
[root at OSS-2 opc]# mkfs.lustre --reformat --ost --fsname="testfs" --index="64" --mgsnode "10.99.101.6 at tcp1" --mgsnode "10.99.101.7 at tcp1" --servicenode "10.99.101.18 at tcp1" "/dev/sdd"
Permanent disk data:
Target: testfs:OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
device size = 51200MB
formatting backing filesystem ldiskfs on /dev/sdd
target name testfs:OST0040
kilobytes 52428800
options -J size=1024 -I 512 -i 69905 -q -O extents,uninit_bg,mmp,dir_nlink,quota,project,huge_file,^fast_commit,flex_bg -G 256 -E resize="4290772992",lazy_journal_init="0",lazy_itable_init="0" -F
mkfs_cmd = mke2fs -j -b 4096 -L testfs:OST0040 -J size=1024 -I 512 -i 69905 -q -O extents,uninit_bg,mmp,dir_nlink,quota,project,huge_file,^fast_commit,flex_bg -G 256 -E resize="4290772992",lazy_journal_init="0",lazy_itable_init="0" -F /dev/sdd 52428800k
Writing CONFIGS/mountdata
[root at OSS-2 opc]# tunefs.lustre --dryrun /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Permanent disk data:
Target: testfs:OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
exiting before disk write.
[root at OSS-2 opc]#
[root at OSS-2 opc]# tunefs.lustre --erase-param failover.node --servicenode 10.99.101.18 at tcp1 /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Permanent disk data:
Target: testfs:OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Writing CONFIGS/mountdata
[root at OSS-2 opc]# mkdir /testfs-OST0040
[root at OSS-2 opc]# mount -t lustre /dev/sdd /testfs-OST0040
mount.lustre: increased '/sys/devices/platform/host5/session3/target5:0:0/5:0:0:1/block/sdd/queue/max_sectors_kb' from 1024 to 16384
[root at OSS-2 opc]#
[root at OSS-2 opc]# tunefs.lustre --dryrun /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Permanent disk data:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
exiting before disk write.
[root at OSS-2 opc]#
Going over to OSS-3 and trying to mount OST.
[root at OSS-3 opc]# lctl list_nids
10.99.101.19 at tcp1
[root at OSS-3 opc]#
Parameters looks same as OSS-2
[root at OSS-3 opc]# tunefs.lustre --dryrun /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Permanent disk data:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
exiting before disk write.
[root at OSS-3 opc]#
Changing failover node to current node.
[root at OSS-3 opc]# tunefs.lustre --erase-param failover.node --servicenode 10.99.101.19 at tcp1 /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.18 at tcp1
Permanent disk data:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1042
(OST update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.19 at tcp1
<waits here for MPP time out (multi mount protection>
After it completes the write, for some reason this OST is being marked as 'first_time' flag 0x1062 in next command.
[root at OSS-3 opc]# tunefs.lustre --dryrun /dev/sdd
checking for existing Lustre data: found
Read previous values:
Target: testfs-OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.19 at tcp1
Permanent disk data:
Target: testfs:OST0040
Index: 64
Lustre FS: testfs
Mount type: ldiskfs
Flags: 0x1062
(OST first_time update no_primnode )
Persistent mount opts: ,errors=remount-ro
Parameters: mgsnode=10.99.101.6 at tcp1:10.99.101.7 at tcp1 failover.node=10.99.101.19 at tcp1
exiting before disk write.
[root at OSS-3 opc]#
Mount doesn't work here because it is marked as first time and this OST is not first time as it was already mounted using OST-2 OSS, and MGS knows about it.
[root at OSS-3 opc]# mkdir /testfs-OST0040
[root at OSS-3 opc]# mount -t lustre /dev/sdd /testfs-OST0040
mount.lustre: mount /dev/sdd at /testfs-OST0040 failed: Address already in use
The target service's index is already in use. (/dev/sdd)
[root at OSS-3 opc]#
>From here, if I do tunefs.lustre with --writeconf, it works. Once this is done, repeating the above experiment any number of times on any servers works fine as expected without using --writeconf. (FYI Note: --writeconfig is mentioned as a dangerous command)
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Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Whamcloud
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