August 2022 - ceph-users

rgw multisite sync not syncing data, error: RGW-SYNC:data:init_data_sync_status: ERROR: failed to read remote data log shards

by Christian Rohmann

Hey ceph-users, I setup a multisite sync between two freshly setup Octopus clusters. In the first cluster I created a bucket with some data just to test the replication of actual data later. I then followed the instructions on https://docs.ceph.com/en/octopus/radosgw/multisite/#migrating-a-single-site… to add a second zone. Things went well and both zones are now happily reaching each other and the API endpoints are talking. Also the metadata is in sync already - both sides are happy and I can see bucket listings and users are "in sync": > # radosgw-admin sync status > realm 13d1b8cb-dc76-4aed-8578-2ce5d3d010e8 (obst) > zonegroup 17a06c15-2665-484e-8c61-cbbb806e11d2 (obst-fra) > zone 6d2c1275-527e-432f-a57a-9614930deb61 (obst-rgn) > metadata sync no sync (zone is master) > data sync source: c07447eb-f93a-4d8f-bf7a-e52fade399f3 (obst-az1) > init > full sync: 128/128 shards > full sync: 0 buckets to sync > incremental sync: 0/128 shards > data is behind on 128 shards > behind shards: [0...127] > and on the other side ... > # radosgw-admin sync status > realm 13d1b8cb-dc76-4aed-8578-2ce5d3d010e8 (obst) > zonegroup 17a06c15-2665-484e-8c61-cbbb806e11d2 (obst-fra) > zone c07447eb-f93a-4d8f-bf7a-e52fade399f3 (obst-az1) > metadata sync syncing > full sync: 0/64 shards > incremental sync: 64/64 shards > metadata is caught up with master > data sync source: 6d2c1275-527e-432f-a57a-9614930deb61 (obst-rgn) > init > full sync: 128/128 shards > full sync: 0 buckets to sync > incremental sync: 0/128 shards > data is behind on 128 shards > behind shards: [0...127] > also the newly created buckets (read: their metadata) is synced. What is apparently not working in the sync of actual data. Upon startup the radosgw on the second site shows: > 2021-06-25T16:15:06.445+0000 7fe71eff5700 1 RGW-SYNC:meta: start > 2021-06-25T16:15:06.445+0000 7fe71eff5700 1 RGW-SYNC:meta: realm > epoch=2 period id=f4553d7c-5cc5-4759-9253-9a22b051e736 > 2021-06-25T16:15:11.525+0000 7fe71dff3700 0 > RGW-SYNC:data:sync:init_data_sync_status: ERROR: failed to read remote > data log shards > also when issuing # radosgw-admin data sync init --source-zone obst-rgn it throws > 2021-06-25T16:20:29.167+0000 7f87c2aec080 0 > RGW-SYNC:data:init_data_sync_status: ERROR: failed to read remote data > log shards Does anybody have any hints on where to look for what could be broken here? Thanks a bunch, Regards Christian

2 months

3
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Small RGW objects and RADOS 64KB minimun size

by Loïc Dachary

Bonjour, Reading Karan's blog post about benchmarking the insertion of billions objects to Ceph via S3 / RGW[0] from last year, it reads: > we decided to lower bluestore_min_alloc_size_hdd to 18KB and re-test. As represented in chart-5, the object creation rate found to be notably reduced after lowering the bluestore_min_alloc_size_hdd parameter from 64KB (default) to 18KB. As such, for objects larger than the bluestore_min_alloc_size_hdd , the default values seems to be optimal, smaller objects further require more investigation if you intended to reduce bluestore_min_alloc_size_hdd parameter. There also is a mail thread dated 2018 on this topic as well, with the same conclusion although using RADOS directly and not RGW[3]. I read the RGW data layout page in the documentation[1] and concluded that by default every object inserted with S3 / RGW will indeed use at least 64kb. A pull request from last year[2] seems to confirm it and also suggests modifying bluestore_min_alloc_size_hdd has adverse side effects. That being said, I'm curious to know if people developed strategies to cope with this overhead. Someone mentioned packing objects together client side to make them larger. But maybe there are simpler ways to do the same? Cheers [0] https://www.redhat.com/en/blog/scaling-ceph-billion-objects-and-beyond [1] https://docs.ceph.com/en/latest/radosgw/layout/ [2] https://github.com/ceph/ceph/pull/32809 [3] https://www.spinics.net/lists/ceph-users/msg45755.html -- Loïc Dachary, Artisan Logiciel Libre

3 months, 3 weeks

4
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MDS crash on FAILED ceph_assert(cur->is_auth())

by Peter van Heusden

I am running Ceph 15.2.13 on CentOS 7.9.2009 and recently my MDS servers have started failing with the error message In function 'void Server::handle_client_open(MDRequestRef&)' thread 7f0ca9908700 time 2021-06-28T09:21:11.484768+0200 /home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/gigantic/release/15.2.13/rpm/el7/BUILD/ceph-15.2.13/src/mds/Server.cc: 4149: FAILED ceph_assert(cur->is_auth()) Complete log is: https://gist.github.com/pvanheus/4da555a6de6b5fa5e46cbf74f5500fbd ceph status output is: # ceph status cluster: id: ed7b2c16-b053-45e2-a1fe-bf3474f90508 health: HEALTH_WARN 30 OSD(s) experiencing BlueFS spillover insufficient standby MDS daemons available 1 MDSs report slow requests 2 mgr modules have failed dependencies 4347046/326505282 objects misplaced (1.331%) 6 nearfull osd(s) 23 pgs not deep-scrubbed in time 23 pgs not scrubbed in time 8 pool(s) nearfull services: mon: 3 daemons, quorum ceph-mon1,ceph-mon2,ceph-mon3 (age 22m) mgr: ceph-mon1(active, since 11w), standbys: ceph-mon2, ceph-mon3 mds: SANBI_FS:2 {0=ceph-mon1=up:active(laggy or crashed),1=ceph-mon2=up:stopping} osd: 54 osds: 54 up (since 2w), 54 in (since 11w); 50 remapped pgs data: pools: 8 pools, 833 pgs objects: 42.37M objects, 89 TiB usage: 159 TiB used, 105 TiB / 264 TiB avail pgs: 4347046/326505282 objects misplaced (1.331%) 782 active+clean 49 active+clean+remapped 1 active+clean+scrubbing+deep 1 active+clean+remapped+scrubbing io: client: 29 KiB/s rd, 427 KiB/s wr, 37 op/s rd, 48 op/s wr When restarting a MDS it goes through states replace, reconnect, resolve and finally sets itself to active before this crash happens. Any advice on what to do? Thanks, Peter P.S. apologies if you received this email more than once - I have had some trouble figuring out the correct mailing list to use.

4 months, 3 weeks

3
5
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cephadm cluster move /var/lib/docker to separate device fails

by Karsten Nielsen

Hi, I have setup a ceph cluster with cephadm with docker backend. I want to move /var/lib/docker to a separate device to get better performance and less load on the OS device. I tried that by stopping docker copy the content of /var/lib/docker to the new device and mount the new device to /var/lib/docker. The other containers started as expected and continues to work and run as expected. But the ceph containers seems to be broken. I am not able to get them back in working state. I have tried to remove the host with `ceph orch host rm itcnchn-bb4067` and readd it but no effect. The strange thing is that 2 of 4 containers comes up as expected. ceph orch ps itcnchn-bb4067 NAME HOST STATUS REFRESHED AGE VERSION IMAGE NAME IMAGE ID CONTAINER ID crash.itcnchn-bb4067 itcnchn-bb4067 running (18h) 10m ago 4w 15.2.7 docker.io/ceph/ceph:v15 2bc420ddb175 2af28c4571cf mds.cephfs.itcnchn-bb4067.qzoshl itcnchn-bb4067 error 10m ago 4w <unknown> docker.io/ceph/ceph:v15 <unknown> <unknown> mon.itcnchn-bb4067 itcnchn-bb4067 error 10m ago 18h <unknown> docker.io/ceph/ceph:v15 <unknown> <unknown> rgw.ikea.dc9-1.itcnchn-bb4067.gtqedc itcnchn-bb4067 running (18h) 10m ago 4w 15.2.7 docker.io/ceph/ceph:v15 2bc420ddb175 00d000aec32b Docker logs from the active manager does not say much about what is wrong debug 2021-01-05T09:57:52.537+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring mds.cephfs.itcnchn-bb4067.qzoshl (unknown last config time)... debug 2021-01-05T09:57:52.541+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring daemon mds.cephfs.itcnchn-bb4067.qzoshl on itcnchn-bb4067 debug 2021-01-05T09:57:52.973+0000 7fdb64e88700 0 log_channel(cluster) log [DBG] : pgmap v347: 241 pgs: 241 active+clean; 18 GiB data, 50 GiB used, 52 TiB / 52 TiB avail; 18 KiB/s rd, 78 KiB/s wr, 24 op/s debug 2021-01-05T09:57:53.085+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring mon.itcnchn-bb4067 (unknown last config time)... debug 2021-01-05T09:57:53.085+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring daemon mon.itcnchn-bb4067 on itcnchn-bb4067 debug 2021-01-05T09:57:53.625+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring rgw.ikea.dc9-1.itcnchn-bb4067.gtqedc (unknown last config time)... debug 2021-01-05T09:57:53.629+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring daemon rgw.ikea.dc9-1.itcnchn-bb4067.gtqedc on itcnchn-bb4067 debug 2021-01-05T09:57:54.141+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring crash.itcnchn-bb4067 (unknown last config time)... debug 2021-01-05T09:57:54.141+0000 7fdb69691700 0 log_channel(cephadm) log [INF] : Reconfiguring daemon crash.itcnchn-bb4067 on itcnchn-bb4067 - Karsten

6 months

2
1
0 0

Stuck OSD service specification - can't remove

by David Orman

Has anybody run into a 'stuck' OSD service specification? I've tried to delete it, but it's stuck in 'deleting' state, and has been for quite some time (even prior to upgrade, on 15.2.x). This is on 16.2.3: NAME PORTS RUNNING REFRESHED AGE PLACEMENT osd.osd_spec 504/525 <deleting> 12m label:osd root@ceph01:/# ceph orch rm osd.osd_spec Removed service osd.osd_spec From active monitor: debug 2021-05-06T23:14:48.909+0000 7f17d310b700 0 log_channel(cephadm) log [INF] : Remove service osd.osd_spec Yet in ls, it's still there, same as above. --export on it: root@ceph01:/# ceph orch ls osd.osd_spec --export service_type: osd service_id: osd_spec service_name: osd.osd_spec placement: {} unmanaged: true spec: filter_logic: AND objectstore: bluestore We've tried --force, as well, with no luck. To be clear, the --export even prior to delete looks nothing like the actual service specification we're using, even after I re-apply it, so something seems 'bugged'. Here's the OSD specification we're applying: service_type: osd service_id: osd_spec placement: label: "osd" data_devices: rotational: 1 db_devices: rotational: 0 db_slots: 12 I would appreciate any insight into how to clear this up (without removing the actual OSDs, we're just wanting to apply the updated service specification - we used to use host placement rules and are switching to label-based). Thanks, David

6 months, 1 week

3
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kernel client osdc ops stuck and mds slow reqs

by Dan van der Ster

Hi all, We are quite regularly (a couple times per week) seeing: HEALTH_WARN 1 clients failing to respond to capability release; 1 MDSs report slow requests MDS_CLIENT_LATE_RELEASE 1 clients failing to respond to capability release mdshpc-be143(mds.0): Client hpc-be028.cern.ch: failing to respond to capability release client_id: 52919162 MDS_SLOW_REQUEST 1 MDSs report slow requests mdshpc-be143(mds.0): 1 slow requests are blocked > 30 secs Which is being caused by osdc ops stuck in a kernel client, e.g.: 10:57:18 root hpc-be028 /root → cat /sys/kernel/debug/ceph/4da6fd06-b069-49af-901f-c9513baabdbd.client52919162/osdc REQUESTS 9 homeless 0 46559317 osd243 3.ee6ffcdb 3.cdb [243,501,92]/243 [243,501,92]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a01.00000057 0x400014 1 read 46559322 osd243 3.ee6ffcdb 3.cdb [243,501,92]/243 [243,501,92]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a01.00000057 0x400014 1 read 46559323 osd243 3.969cc573 3.573 [243,330,226]/243 [243,330,226]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a56.00000056 0x400014 1 read 46559341 osd243 3.969cc573 3.573 [243,330,226]/243 [243,330,226]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a56.00000056 0x400014 1 read 46559342 osd243 3.969cc573 3.573 [243,330,226]/243 [243,330,226]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a56.00000056 0x400014 1 read 46559345 osd243 3.969cc573 3.573 [243,330,226]/243 [243,330,226]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a56.00000056 0x400014 1 read 46559621 osd243 3.6313e8ef 3.8ef [243,330,521]/243 [243,330,521]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a45.0000007a 0x400014 1 read 46559629 osd243 3.b280c852 3.852 [243,113,539]/243 [243,113,539]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f09a3a.0000007f 0x400014 1 read 46559928 osd243 3.1ee7bab4 3.ab4 [243,332,94]/243 [243,332,94]/243 e678697 fsvolumens_355f485c-6319-4ffe-acd6-94a07f2a14b4/10003f099ff.0000073f 0x400024 1 write LINGER REQUESTS BACKOFFS We can unblock those requests by doing `ceph osd down osd.243` (or restarting osd.243). This is ceph v14.2.6 and the client kernel is el7 3.10.0-957.27.2.el7.x86_64. Are there a better way to debug this? Best Regards, Dan

7 months

4
12
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OSD slow ops warning not clearing after OSD down

by Frank Schilder

Dear cephers, I have a strange problem. An OSD went down and recovery finished. For some reason, I have a slow ops warning for the failed OSD stuck in the system: health: HEALTH_WARN 430 slow ops, oldest one blocked for 36 sec, osd.580 has slow ops The OSD is auto-out: | 580 | ceph-22 | 0 | 0 | 0 | 0 | 0 | 0 | autoout,exists | It is probably a warning dating back to just before the fail. How can I clear it? Thanks and best regards, ================= Frank Schilder AIT Risø Campus Bygning 109, rum S14

8 months, 1 week

4
7
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[ERR] OSD_SCRUB_ERRORS: 2 scrub errors

by Szabo, Istvan (Agoda)

Hi, I’m continuously getting scrub errors in my index pool and log pool that I need to repair always. HEALTH_ERR 2 scrub errors; Possible data damage: 1 pg inconsistent [ERR] OSD_SCRUB_ERRORS: 2 scrub errors [ERR] PG_DAMAGED: Possible data damage: 1 pg inconsistent pg 20.19 is active+clean+inconsistent, acting [39,41,37] Why is this? I have no cue at all, no log entry no anything ☹ ________________________________ This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses.

8 months, 2 weeks

6
9
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ceph-users August 2022