[ceph-users] Re: Xfs kernel panic during rbd mount

Hi, A few weeks ago several of our rdb images became unresponsive after a few of our OSDs reached a near full state. Another member of the team rebooted the server that the rbd images are mounted on in an attempt to resolve the issue. In the meantime I added several more nodes to the cluster in order to get additional space. Here are some cluster details: root@rbd1:/var/log# ceph -v ceph version 12.2.12 (1436006594665279fe734b4c15d7e08c13ebd777) luminous (stable) root@rbd1:/var/log# uname -va Linux rbd1 4.15.0-48-generic #51~16.04.1-Ubuntu SMP Fri Apr 5 12:01:12 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux root@rbd1:/var/log# ceph -s cluster: id: 504b5794-34bd-44e7-a8c3-0494cf800c23 health: HEALTH_ERR crush map has legacy tunables (require argonaut, min is firefly) full ratio(s) out of order 2091546/274437905 objects misplaced (0.762%) Reduced data availability: 114 pgs inactive 1 slow requests are blocked > 32 sec. Implicated osds 152 4 stuck requests are blocked > 4096 sec. Implicated osds 6,99 services: mon: 3 daemons, quorum hqceph1,hqceph2,hqceph3 mgr: hqceph2(active), standbys: hqceph3 osd: 291 osds: 283 up, 265 in; 116 remapped pgs rgw: 1 daemon active data: pools: 17 pools, 8199 pgs objects: 91.48M objects, 292TiB usage: 880TiB used, 758TiB / 1.60PiB avail pgs: 1.390% pgs not active 2091546/274437905 objects misplaced (0.762%) 8040 active+clean 114 activating+remapped 40 active+clean+scrubbing+deep 3 active+clean+scrubbing 2 active+remapped+backfilling io: recovery: 41.4MiB/s, 12objects/s This morning I got on the server in order to map and mount the 5 or so RBD images that are shared out via samba on this server. After waiting about 10 minutes it was clear something was not 100% correct…here is what I found in the kern.log file: Aug 31 11:43:16 rbd1 kernel: [2158818.570948] libceph: mon0 10.35.1.201:6789 session established Aug 31 11:43:16 rbd1 kernel: [2158818.576306] libceph: client182797617 fsid 504b5794-34bd-44e7-a8c3-0494cf800c23 Aug 31 11:43:16 rbd1 kernel: [2158818.710199] rbd: rbd0: capacity 54975581388800 features 0x0 Aug 31 11:43:22 rbd1 kernel: [2158824.685353] XFS (rbd0): Mounting V4 Filesystem Aug 31 11:44:19 rbd1 kernel: [2158881.536794] XFS (rbd0): Starting recovery (logdev: internal) Aug 31 11:47:06 rbd1 kernel: [2159048.202835] INFO: task mount:33177 blocked for more than 120 seconds. Aug 31 11:47:06 rbd1 kernel: [2159048.203053] Not tainted 4.15.0-48-generic #51~16.04.1-Ubuntu Aug 31 11:47:06 rbd1 kernel: [2159048.203260] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 31 11:47:06 rbd1 kernel: [2159048.203523] mount D 0 33177 33011 0x00000000 Aug 31 11:47:06 rbd1 kernel: [2159048.203527] Call Trace: Aug 31 11:47:06 rbd1 kernel: [2159048.203538] __schedule+0x3d6/0x8b0 Aug 31 11:47:06 rbd1 kernel: [2159048.203542] ? __switch_to_asm+0x34/0x70 Aug 31 11:47:06 rbd1 kernel: [2159048.203546] schedule+0x36/0x80 Aug 31 11:47:06 rbd1 kernel: [2159048.203551] schedule_timeout+0x1db/0x370 Aug 31 11:47:06 rbd1 kernel: [2159048.203629] ? xfs_trans_read_buf_map+0xf8/0x330 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203634] wait_for_completion+0xb4/0x140 Aug 31 11:47:06 rbd1 kernel: [2159048.203637] ? wake_up_q+0x70/0x70 Aug 31 11:47:06 rbd1 kernel: [2159048.203691] ? xfs_trans_read_buf_map+0xf8/0x330 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203740] ? _xfs_buf_read+0x23/0x30 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203787] xfs_buf_submit_wait+0x7f/0x220 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203839] ? xfs_trans_read_buf_map+0xf8/0x330 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203887] _xfs_buf_read+0x23/0x30 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203933] xfs_buf_read_map+0x10a/0x190 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.203985] xfs_trans_read_buf_map+0xf8/0x330 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204022] xfs_read_agf+0x90/0x120 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204058] xfs_alloc_read_agf+0x49/0x1d0 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204094] xfs_alloc_pagf_init+0x29/0x60 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204141] xfs_initialize_perag_data+0x99/0x110 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204193] xfs_mountfs+0x79b/0x950 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204243] ? xfs_mru_cache_create+0x12b/0x170 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204294] xfs_fs_fill_super+0x428/0x5e0 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204300] mount_bdev+0x246/0x290 Aug 31 11:47:06 rbd1 kernel: [2159048.204349] ? xfs_test_remount_options.isra.16+0x60/0x60 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204398] xfs_fs_mount+0x15/0x20 [xfs] Aug 31 11:47:06 rbd1 kernel: [2159048.204402] mount_fs+0x3d/0x150 Aug 31 11:47:06 rbd1 kernel: [2159048.204406] vfs_kern_mount+0x67/0x110 Aug 31 11:47:06 rbd1 kernel: [2159048.204410] do_mount+0x201/0xd00 Aug 31 11:47:06 rbd1 kernel: [2159048.204414] ? __check_object_size+0xfc/0x1a0 Aug 31 11:47:06 rbd1 kernel: [2159048.204418] SyS_mount+0x95/0xe0 Aug 31 11:47:06 rbd1 kernel: [2159048.204423] do_syscall_64+0x73/0x130 Aug 31 11:47:06 rbd1 kernel: [2159048.204426] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Aug 31 11:47:06 rbd1 kernel: [2159048.204429] RIP: 0033:0x7f77a9a4fc5a Aug 31 11:47:06 rbd1 kernel: [2159048.204431] RSP: 002b:00007ffda3e83818 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 Aug 31 11:47:06 rbd1 kernel: [2159048.204435] RAX: ffffffffffffffda RBX: 0000000002424030 RCX: 00007f77a9a4fc5a Aug 31 11:47:06 rbd1 kernel: [2159048.204436] RDX: 0000000002424210 RSI: 0000000002424310 RDI: 0000000002424230 Aug 31 11:47:06 rbd1 kernel: [2159048.204438] RBP: 0000000000000000 R08: 0000000002424280 R09: 0000000000000012 Aug 31 11:47:06 rbd1 kernel: [2159048.204440] R10: 00000000c0ed0c00 R11: 0000000000000206 R12: 0000000002424230 Aug 31 11:47:06 rbd1 kernel: [2159048.204441] R13: 0000000002424210 R14: 0000000000000000 R15: 0000000000000003 Any suggestions on what I can/should do next?