Thanks, If the OSDs have a newer epoch of the OSDMap than the MON it won't work. How can I verify this? (i.e the epoch of the monitor vs the epoch of the osd(s)) Cheers, Sean On 19/02/2020, at 7:25 PM, Wido den Hollander <wido@xxxxxxxx<mailto:wido@xxxxxxxx>> wrote: On 2/19/20 5:45 AM, Sean Matheny wrote: I wanted to add a specific question to the previous post, in the hopes it’s easier to answer. We have a Luminous monitor restored from the OSDs using ceph-object-tool, which seems like the best chance of any success. We followed this rough process: https://tracker.ceph.com/issues/24419 The monitor has come up (as a single monitor cluster), but it’s reporting wildly inaccurate info, such as the number of osds that are down (157 but all 223 are down), and hosts (1, but all 14 are down). Have you verified that the MON's database has the same epoch of the OSDMap (or newer) as all the other OSDs? If the OSDs have a newer epoch of the OSDMap than the MON it won't work. The OSD Daemons are still off, but I’m not sure if starting them back up with this monitor will make things worse. The fact that this mon daemon can’t even see how many OSDs are correctly down makes me think that nothing good will come from turning the OSDs back on. Do I run risk of further corruption (i.e. on the Ceph side, not client data as the cluster is paused) if I proceed and turn on the osd daemons? Or is it worth a shot? Are these Ceph health metrics commonly inaccurate until it can talk to the daemons? The PG stats will be inaccurate indeed and the number of OSDs can vary as long as they aren't able to peer with each other and the MONs. (Also other commands like `ceph osd tree` agree with the below `ceph -s` so far) Many thanks for any wisdom… I just don’t want to make things (unnecessarily) much worse. Cheers, Sean root@ntr-mon01:/var/log/ceph# ceph -s cluster: id: ababdd7f-1040-431b-962c-c45bea5424aa health: HEALTH_WARN pauserd,pausewr,noout,norecover,noscrub,nodeep-scrub flag(s) set 157 osds down 1 host (15 osds) down Reduced data availability: 12225 pgs inactive, 885 pgs down, 673 pgs peering Degraded data redundancy: 14829054/35961087 objects degraded (41.236%), 2869 pgs degraded, 2995 pgs undersized services: mon: 1 daemons, quorum ntr-mon01 mgr: ntr-mon01(active) osd: 223 osds: 66 up, 223 in flags pauserd,pausewr,noout,norecover,noscrub,nodeep-scrub data: pools: 14 pools, 15220 pgs objects: 10.58M objects, 40.1TiB usage: 43.0TiB used, 121TiB / 164TiB avail pgs: 70.085% pgs unknown 10.237% pgs not active 14829054/35961087 objects degraded (41.236%) 10667 unknown 2869 active+undersized+degraded 885 down 673 peering 126 active+undersized On 19/02/2020, at 10:18 AM, Sean Matheny <s.matheny@xxxxxxxxxxxxxx<mailto:s.matheny@xxxxxxxxxxxxxx><mailto:s.matheny@xxxxxxxxxxxxxx>> wrote: Hi folks, Our entire cluster is down at the moment. We started upgrading from 12.2.13 to 14.2.7 with the monitors. The first monitor we upgraded crashed. We reverted to luminous on this one and tried another, and it was fine. We upgraded the rest, and they all worked. Then we upgraded the first one again, and after it became the leader, it died. Then the second one became the leader, and it died. Then the third became the leader, and it died, leaving mon 4 and 5 unable to form a quorum. We tried creating a single monitor cluster by editing the monmap of mon05, and it died in the same way, just without the paxos negotiation first. We have tried to revert to a luminous (12.2.12) monitor backup taken a few hours before the crash. The mon daemon will start, but is flooded with blocked requests and unknown pgs after a while. For better or worse we removed the “noout” flag and 144 of 232 OSDs are now showing as down: cluster: id: ababdd7f-1040-431b-962c-c45bea5424aa health: HEALTH_ERR noout,nobackfill,norecover flag(s) set 101 osds down 9 hosts (143 osds) down 1 auth entities have invalid capabilities Long heartbeat ping times on back interface seen, longest is 15424.178 msec Long heartbeat ping times on front interface seen, longest is 14763.145 msec Reduced data availability: 521 pgs inactive, 48 pgs stale 274 slow requests are blocked > 32 sec 88 stuck requests are blocked > 4096 sec 1303 slow ops, oldest one blocked for 174 sec, mon.ntr-mon01 has slow ops too many PGs per OSD (299 > max 250) services: mon: 1 daemons, quorum ntr-mon01 (age 3m) mgr: ntr-mon01(active, since 30m) mds: cephfs:1 {0=akld2e18u42=up:active(laggy or crashed)} osd: 223 osds: 66 up, 167 in flags noout,nobackfill,norecover rgw: 2 daemons active (ntr-rgw01, ntr-rgw02) data: pools: 14 pools, 15220 pgs objects: 35.26M objects, 134 TiB usage: 379 TiB used, 1014 TiB / 1.4 PiB avail pgs: 3.423% pgs unknown 14651 active+clean 521 unknown 48 stale+active+clean io: client: 20 KiB/s rd, 439 KiB/s wr, 7 op/s rd, 54 op/s wr These luminous OSD daemons are not down, but are all in fact running. They just have no comms with the monitor: 2020-02-19 10:12:33.565680 7ff222e24700 1 osd.0 pg_epoch: 305104 pg[100.37as3( v 129516'2 (0'0,129516'2] local-lis/les=297268/297269 n=0 ec=129502/129502 lis/c 297268/297268 les/c/f 297269/297358/0 297268/297268/161526) [41,192,216,0,160,117]p41(0) r=3 lpr=305101 crt=129516'2 lcod 0'0 unknown NOTIFY mbc={}] state<Start>: transitioning to Stray 2020-02-19 10:12:33.565861 7ff222e24700 1 osd.0 pg_epoch: 305104 pg[4.53c( v 305046'1933429 (304777'1931907,305046'1933429] local-lis/les=298009/298010 n=7350 ec=768/768 lis/c 298009/298009 les/c/f 298010/298010/0 297268/298009/298009) [0,61,103] r=0 lpr=305101 crt=305046'1933429 lcod 0'0 mlcod 0'0 unknown mbc={}] state<Start>: transitioning to Primary 2020-02-19 10:12:33.566742 7ff222e24700 1 osd.0 pg_epoch: 305104 pg[100.des4( v 129516'1 (0'0,129516'1] local-lis/les=292010/292011 n=1 ec=129502/129502 lis/c 292010/292010 les/c/f 292011/292417/0 292010/292010/280955) [149,62,209,187,0,98]p149(0) r=4 lpr=305072 crt=129516'1 lcod 0'0 unknown NOTIFY mbc={}] state<Start>: transitioning to Stray 2020-02-19 10:12:33.566896 7ff23ccd9e00 0 osd.0 305104 done with init, starting boot process 2020-02-19 10:12:33.566956 7ff23ccd9e00 1 osd.0 305104 start_boot One oddity in our deployment is that there was a test mds instance, and it is running mimic. I shut it down, as the monitor trace has an MDS call in it, but the nautilus monitors still die the same way. "mds": { "ceph version 13.2.8 (5579a94fafbc1f9cc913a0f5d362953a5d9c3ae0) mimic (stable)": 1 }, ... -11> 2020-02-18 09:50:00.800 7fd164a1a700 5 mon.ntr-mon02@1(leader).paxos(paxos recovering c 85448935..85449502) is_readable = 0 - now=2020-02-18 09:50:00.804429 lease_expire=0.000000 has v0 lc 85449502 -10> 2020-02-18 09:50:00.800 7fd164a1a700 5 mon.ntr-mon02@1(leader).paxos(paxos recovering c 85448935..85449502) is_readable = 0 - now=2020-02-18 09:50:00.804446 lease_expire=0.000000 has v0 lc 85449502 -9> 2020-02-18 09:50:00.800 7fd164a1a700 5 mon.ntr-mon02@1(leader).paxos(paxos recovering c 85448935..85449502) is_readable = 0 - now=2020-02-18 09:50:00.804460 lease_expire=0.000000 has v0 lc 85449502 -8> 2020-02-18 09:50:00.800 7fd164a1a700 4 set_mon_vals no callback set -7> 2020-02-18 09:50:00.800 7fd164a1a700 4 mgrc handle_mgr_map Got map version 2301191 -6> 2020-02-18 09:50:00.804 7fd164a1a700 4 mgrc handle_mgr_map Active mgr is now v1:10.31.88.17:6801/2924412 -5> 2020-02-18 09:50:00.804 7fd164a1a700 0 log_channel(cluster) log [DBG] : monmap e25: 5 mons at {ntr-mon01=v1:10.31.88.14:6789/0,ntr-mon02=v1:10.31.88.15:6789/0,ntr-mon03=v1:10.31.88.16:6789/0,ntr-mon04=v1:10.31.88.17:6789/0,ntr-mon05=v1:10.31.88.18:6789/0} -4> 2020-02-18 09:50:00.804 7fd164a1a700 10 log_client _send_to_mon log to self -3> 2020-02-18 09:50:00.804 7fd164a1a700 10 log_client log_queue is 3 last_log 3 sent 2 num 3 unsent 1 sending 1 -2> 2020-02-18 09:50:00.804 7fd164a1a700 10 log_client will send 2020-02-18 09:50:00.806845 mon.ntr-mon02 (mon.1) 3 : cluster [DBG] monmap e25: 5 mons at {ntr-mon01=v1:10.31.88.14:6789/0,ntr-mon02=v1:10.31.88.15:6789/0,ntr-mon03=v1:10.31.88.16:6789/0,ntr-mon04=v1:10.31.88.17:6789/0,ntr-mon05=v1:10.31.88.18:6789/0} -1> 2020-02-18 09:50:00.804 7fd164a1a700 5 mon.ntr-mon02@1(leader).paxos(paxos active c 85448935..85449502) is_readable = 1 - now=2020-02-18 09:50:00.806920 lease_expire=2020-02-18 09:50:05.804479 has v0 lc 85449502 0> 2020-02-18 09:50:00.812 7fd164a1a700 -1 *** Caught signal (Aborted) ** in thread 7fd164a1a700 thread_name:ms_dispatch ceph version 14.2.7 (3d58626ebeec02d8385a4cefb92c6cbc3a45bfe8) nautilus (stable) 1: (()+0x11390) [0x7fd171e98390] 2: (gsignal()+0x38) [0x7fd1715e5428] 3: (abort()+0x16a) [0x7fd1715e702a] 4: (__gnu_cxx::__verbose_terminate_handler()+0x135) [0x7fd173673bf5] 5: (__cxxabiv1::__terminate(void (*)())+0x6) [0x7fd173667bd6] 6: (()+0x8b6c21) [0x7fd173667c21] 7: (()+0x8c2e34) [0x7fd173673e34] 8: (std::__throw_out_of_range(char const*)+0x3f) [0x7fd17367f55f] 9: (MDSMonitor::maybe_resize_cluster(FSMap&, int)+0xcf0) [0x79ae00] 10: (MDSMonitor::tick()+0xc9) [0x79c669] 11: (MDSMonitor::on_active()+0x28) [0x785e88] 12: (PaxosService::_active()+0xdd) [0x6d4b2d] 13: (Context::complete(int)+0x9) [0x600789] 14: (void finish_contexts<std::__cxx11::list<Context*, std::allocator<Context*> > >(CephContext*, std::__cxx11::list<Context*, std::allocator<Context*> >&, int)+0xa8) [0x6299a8] 15: (Paxos::finish_round()+0x76) [0x6cb276] 16: (Paxos::handle_last(boost::intrusive_ptr<MonOpRequest>)+0xbff) [0x6cc47f] 17: (Paxos::dispatch(boost::intrusive_ptr<MonOpRequest>)+0x24b) [0x6ccf2b] 18: (Monitor::dispatch_op(boost::intrusive_ptr<MonOpRequest>)+0x15c5) [0x5fa6f5] 19: (Monitor::_ms_dispatch(Message*)+0x4d2) [0x5fad42] 20: (Monitor::ms_dispatch(Message*)+0x26) [0x62b046] 21: (Dispatcher::ms_dispatch2(boost::intrusive_ptr<Message> const&)+0x26) [0x6270b6] 22: (DispatchQueue::entry()+0x1219) [0x7fd1732b7e59] 23: (DispatchQueue::DispatchThread::entry()+0xd) [0x7fd17336836d] 24: (()+0x76ba) [0x7fd171e8e6ba] 25: (clone()+0x6d) [0x7fd1716b741d] ... Ceph versions output { "mon": { "ceph version 12.2.13 (584a20eb0237c657dc0567da126be145106aa47e) luminous (stable)": 1, "ceph version 14.2.7 (3d58626ebeec02d8385a4cefb92c6cbc3a45bfe8) nautilus (stable)": 4 }, "mgr": { "ceph version 12.2.12 (1436006594665279fe734b4c15d7e08c13ebd777) luminous (stable)": 1, "ceph version 12.2.13 (584a20eb0237c657dc0567da126be145106aa47e) luminous (stable)": 1, "ceph version 14.2.7 (3d58626ebeec02d8385a4cefb92c6cbc3a45bfe8) nautilus (stable)": 2 }, "osd": { "ceph version 12.2.11 (26dc3775efc7bb286a1d6d66faee0ba30ea23eee) luminous (stable)": 175, "ceph version 12.2.12 (1436006594665279fe734b4c15d7e08c13ebd777) luminous (stable)": 32, "ceph version 12.2.13 (584a20eb0237c657dc0567da126be145106aa47e) luminous (stable)": 16 }, "mds": { "ceph version 13.2.8 (5579a94fafbc1f9cc913a0f5d362953a5d9c3ae0) mimic (stable)": 1 }, "rgw": { "ceph version 12.2.12 (1436006594665279fe734b4c15d7e08c13ebd777) luminous (stable)": 2 }, "overall": { "ceph version 12.2.11 (26dc3775efc7bb286a1d6d66faee0ba30ea23eee) luminous (stable)": 175, "ceph version 12.2.12 (1436006594665279fe734b4c15d7e08c13ebd777) luminous (stable)": 35, "ceph version 12.2.13 (584a20eb0237c657dc0567da126be145106aa47e) luminous (stable)": 18, "ceph version 13.2.8 (5579a94fafbc1f9cc913a0f5d362953a5d9c3ae0) mimic (stable)": 1, "ceph version 14.2.7 (3d58626ebeec02d8385a4cefb92c6cbc3a45bfe8) nautilus (stable)": 6 } } We’ve filed a bug report with the actions of the actual cascading crash described above (when we upgraded mon01 and it became the leader): https://tracker.ceph.com/issues/44185 (parts here copied from that report) Right now we’re not sure what the best path to some sort of recovery would be. All OSD Daemons are still on Luminous, so AFAICT, we could build the monitor db from the OSDs with https://github.com/ceph/ceph/blob/luminous/doc/rados/troubleshooting/troubleshooting-mon.rst#recovery-using-osds which describes using this script: #!/bin/bash hosts="ntr-sto01 ntr-sto02" ms=/tmp/mon-store/ mkdir $ms # collect the cluster map from OSDs for host in $hosts; do echo $host rsync -avz $ms root@$host:$ms rm -rf $ms ssh root@$host <<EOF for osd in /var/lib/ceph/osd/ceph-*; do ceph-objectstore-tool --data-path \$osd --op update-mon-db --mon-store-path $ms done EOF rsync -avz root@$host:$ms $ms done If this is our best idea to try, should we try the mon store from the above script on a luminous or nautilus mon daemon? Any other ideas to try at this dark hour? : \ Cheers, Sean _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx><mailto:ceph-users@xxxxxxx> To unsubscribe send an email to ceph-users-leave@xxxxxxx<mailto:ceph-users-leave@xxxxxxx><mailto:ceph-users-leave@xxxxxxx> _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx> To unsubscribe send an email to ceph-users-leave@xxxxxxx<mailto:ceph-users-leave@xxxxxxx> _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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