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 <[email protected]> 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@OSS-2 opc]# lctl list_nids > > 10.99.101.18@tcp1 > > [root@OSS-2 opc]# > > > [root@OSS-2 opc]# mkfs.lustre --reformat --ost --fsname="testfs" > --index="64" --mgsnode "10.99.101.6@tcp1" --mgsnode "10.99.101.7@tcp1" > --servicenode "10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@tcp1 > > > exiting before disk write. > > [root@OSS-2 opc]# > > > [root@OSS-2 opc]# tunefs.lustre --erase-param failover.node --servicenode > 10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@tcp1 > > > Writing CONFIGS/mountdata > > > [root@OSS-2 opc]# mkdir /testfs-OST0040 > > [root@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@OSS-2 opc]# > > > [root@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@tcp1 > > > exiting before disk write. > > [root@OSS-2 opc]# > > > > > Going over to OSS-3 and trying to mount OST. > > > > [root@OSS-3 opc]# lctl list_nids > > 10.99.101.19@tcp1 > > [root@OSS-3 opc]# > > > Parameters looks same as OSS-2 > > > [root@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@tcp1 > > > exiting before disk write. > > [root@OSS-3 opc]# > > > Changing failover node to current node. > > > [root@OSS-3 opc]# tunefs.lustre --erase-param failover.node --servicenode > 10.99.101.19@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.18@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.19@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@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.19@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@tcp1:10.99.101.7@tcp1 > failover.node=10.99.101.19@tcp1 > > > exiting before disk write. > > [root@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@OSS-3 opc]# mkdir /testfs-OST0040 > > [root@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@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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