August 2020 - ceph-users

by jesper＠krogh.cc

Hi I would like to change the crush rule so data lands on ssd instead of hdd, can this be done on the fly and migration will just happen or do I need to do something to move data? Jesper Sent from myMail for iOS

3 years, 7 months

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cephadm - How to deploy ceph cluster with a partition on SSD for block.db

by klemen＠psi-net.si

I'm trying to deploy a ceph cluster with a cephadm tool. I've already successfully done all steps except adding OSDs. My testing equipment consists of three hosts. Each host has SSD storage, where OS is installed into. On that storage I created partition, which can be used as a ceph block.db. Hosts have also 2 additional HDs (spinning drives) for OSD data. On docs I couldn't find how to deploy such configuration. Do you have any hints, how to do that? Thanks for help!

3 years, 7 months

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slow "rados ls"

by Marcel Kuiper

Hi One of my clusters running nautilus 14.2.8 is very slow (13 seconds or so where my other clusters are returning almost instantanious) when doing a 'rados --pool rc3-se.rgw.buckets.index ls' from one of the monitors. I checked - ceph status => OK - routing to/from osds ok (I see a lot of established connections to osds due to the command, nothing in syn_sent indicating incomplete handshake) - ping times are OK - no interface errors - no packet drops - no increasing send queus - and as far as I can see nothing out of the ordinary in mon and osd logs I have no clue how to debug the issue. If someone has pointers it would be much appreciated Kind Regards Marcel

3 years, 7 months

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Storage class usage stats

by Tobias Urdin

Hello, I've been trying to understand if there is any way to get usage information based on storage classes for buckets. Since there is no information available from the "radosgw-admin bucket stats" commands nor any other endpoint I tried to browse the source code but couldn't find any references where the storage class would be exposed in such a way. It also seems that RadosGW today is not saving any counters on amount of objects stored in storage classes when it's collecting usage stats, which means there is no such metadata saved for a bucket. I was hoping it was atleast saved but not exposed because then it would have been a easier fix than adding support to count number of objects in storage classes based on operations which would involve a lot of places and mean writing to the bucket metadata on each op :( Is my assumptions correct that there is no way to retrieve such information, meaning there is no way to measure such usage? If the answer is yes, I assume the only way to get something that could be measured would be to instead have multiple placement targets since that is exposed from in bucket info. The bad things would be though that you lose a lot of functionality related to lifecycle and moving a single object to another storage class. Best regards Tobias

3 years, 7 months

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Release mental stress using Hong Kong Assignment help

by james wick

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3 years, 7 months

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add debian buster stable support for ceph-deploy

by Jelle de Jong

Hello everybody, Can somebody add support for Debian buster and ceph-deploy: https://tracker.ceph.com/issues/42870 Highly appreciated, Regards, Jelle de Jong

3 years, 7 months

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Recover pgs from failed osds

by Vahideh Alinouri

Ceph cluster is updated from nautilus to octopus. On ceph-osd nodes we have high I/O wait. After increasing one of pool’s pg_num from 64 to 128 according to warning message (more objects per pg), this lead to high cpu load and ram usage on ceph-osd nodes and finally crashed the whole cluster. Three osds, one on each host, stuck at down state (osd.34 osd.35 osd.40). Starting the down osd service causes high ram usage and cpu load and ceph-osd node to crash until the osd service fails. The active mgr service on each mon host will crash after consuming almost all available ram on the physical hosts. I need to recover pgs and solving corruption. How can i recover unknown and down pgs? Is there any way to starting up failed osd? Below steps are done: 1- osd nodes’ kernel was upgraded to 5.4.2 before ceph cluster upgrading. Reverting to previous kernel 4.2.1 is tested for iowate decreasing, but it had no effect. 2- Recovering 11 pgs on failed osds by export them using ceph-objectstore-tools utility and import them on other osds. The result followed: 9 pgs are “down” and 2 pgs are “unknown”. 2-1) 9 pgs export and import successfully but status is “down” because of "peering_blocked_by" 3 failed osds. I cannot lost osds because of preventing unknown pgs from getting lost. pgs size in K and M. "peering_blocked_by": [ { "osd": 34, "current_lost_at": 0, "comment": "starting or marking this osd lost may let us proceed" }, { "osd": 35, "current_lost_at": 0, "comment": "starting or marking this osd lost may let us proceed" }, { "osd": 40, "current_lost_at": 0, "comment": "starting or marking this osd lost may let us proceed" } ] 2-2) 1 pg (2.39) export and import successfully, but after starting osd service (pg import to it), ceph-osd node RAM and CPU consumption increase and cause ceph-osd node to crash until the osd service fails. Other osds become "down" on ceph-osd node. pg status is “unknown”. I cannot use "force-create-pg" because of data lost. pg 2.39 size is 19G. # ceph pg map 2.39 osdmap e40347 pg 2.39 (2.39) -> up [32,37] acting [32,37] # ceph pg 2.39 query Error ENOENT: i don't have pgid 2.39 *pg 2.39 info on failed osd: # ceph-objectstore-tool --data-path /var/lib/ceph/osd/*ceph-34* --op info --pgid 2.39 { "pgid": "2.39", "last_update": "35344'6456084", "last_complete": "35344'6456084", "log_tail": "35344'6453182", "last_user_version": 10595821, "last_backfill": "MAX", "purged_snaps": [], "history": { "epoch_created": 146, "epoch_pool_created": 79, "last_epoch_started": 25208, "last_interval_started": 25207, "last_epoch_clean": 25208, "last_interval_clean": 25207, "last_epoch_split": 370, "last_epoch_marked_full": 0, "same_up_since": 8347, "same_interval_since": 25207, "same_primary_since": 8321, "last_scrub": "35328'6440139", "last_scrub_stamp": "2020-08-19T12:00:59.377593+0430", "last_deep_scrub": "35261'6031075", "last_deep_scrub_stamp": "2020-08-17T01:59:26.606037+0430", "last_clean_scrub_stamp": "2020-08-19T12:00:59.377593+0430", "prior_readable_until_ub": 0 }, "stats": { "version": "35344'6456082", "reported_seq": "11733156", "reported_epoch": "35344", "state": "active+clean", "last_fresh": "2020-08-19T14:16:18.587435+0430", "last_change": "2020-08-19T12:00:59.377747+0430", "last_active": "2020-08-19T14:16:18.587435+0430", "last_peered": "2020-08-19T14:16:18.587435+0430", "last_clean": "2020-08-19T14:16:18.587435+0430", "last_became_active": "2020-08-06T00:23:51.016769+0430", "last_became_peered": "2020-08-06T00:23:51.016769+0430", "last_unstale": "2020-08-19T14:16:18.587435+0430", "last_undegraded": "2020-08-19T14:16:18.587435+0430", "last_fullsized": "2020-08-19T14:16:18.587435+0430", "mapping_epoch": 8347, "log_start": "35344'6453182", "ondisk_log_start": "35344'6453182", "created": 146, "last_epoch_clean": 25208, "parent": "0.0", "parent_split_bits": 7, "last_scrub": "35328'6440139", "last_scrub_stamp": "2020-08-19T12:00:59.377593+0430", "last_deep_scrub": "35261'6031075", "last_deep_scrub_stamp": "2020-08-17T01:59:26.606037+0430", "last_clean_scrub_stamp": "2020-08-19T12:00:59.377593+0430", "log_size": 2900, "ondisk_log_size": 2900, "stats_invalid": false, "dirty_stats_invalid": false, "omap_stats_invalid": false, "hitset_stats_invalid": false, "hitset_bytes_stats_invalid": false, "pin_stats_invalid": false, "manifest_stats_invalid": false, "snaptrimq_len": 0, "stat_sum": { "num_bytes": 19749578960, "num_objects": 2442, "num_object_clones": 20, "num_object_copies": 7326, "num_objects_missing_on_primary": 0, "num_objects_missing": 0, "num_objects_degraded": 0, "num_objects_misplaced": 0, "num_objects_unfound": 0, "num_objects_dirty": 2442, "num_whiteouts": 0, "num_read": 16120686, "num_read_kb": 82264126, "num_write": 19731882, "num_write_kb": 379030181, "num_scrub_errors": 0, "num_shallow_scrub_errors": 0, "num_deep_scrub_errors": 0, "num_objects_recovered": 2861, "num_bytes_recovered": 21673259070, "num_keys_recovered": 32, "num_objects_omap": 2, "num_objects_hit_set_archive": 0, "num_bytes_hit_set_archive": 0, "num_flush": 0, "num_flush_kb": 0, "num_evict": 0, "num_evict_kb": 0, "num_promote": 0, "num_flush_mode_high": 0, "num_flush_mode_low": 0, "num_evict_mode_some": 0, "num_evict_mode_full": 0, "num_objects_pinned": 0, "num_legacy_snapsets": 0, "num_large_omap_objects": 0, "num_objects_manifest": 0, "num_omap_bytes": 152, "num_omap_keys": 16, "num_objects_repaired": 0 }, "up": [ 40, 35, 34 ], "acting": [ 40, 35, 34 ], "avail_no_missing": [], "object_location_counts": [], "blocked_by": [], "up_primary": 40, "acting_primary": 40, "purged_snaps": [] }, "empty": 0, "dne": 0, "incomplete": 0, "last_epoch_started": 25208, "hit_set_history": { "current_last_update": "0'0", "history": [] } } *pg 2.39 info on osd which import to it: # ceph-objectstore-tool --data-path /var/lib/ceph/osd/*ceph-37* --op info --pgid 2.39 PG '2.39' not found 2-3) 1 pg (2.79) is lost! This pg is not found on any of three failed osds (osd.34 osd.35 osd.40)! status is “unknown”. pg 2.79 export is failed: " PG '2.79' not found" # ceph pg map 2.79 Error ENOENT: i don't have pgid 2.79 # ceph-objectstore-tool --data-path /var/lib/ceph/osd/ceph-34 --op info --pgid 2.79 PG '2.79' not found 3- Using https://gitlab.lbader.de/kryptur/ceph-recovery/tree/master but it does not work for recent ceph versions and tested on “hammer” release. 4- Using https://ceph.io/planet/recovering-from-a-complete-node-failure/ but in lvm scenario I could not mount failed osd lv to new /var/lib/ceph/osd/ceph-x* .*Could not prepare and activate new osd to failed osd disk. 5- Setting pool min_size=1 that down pgs belong to it, restart osds that pgs import to them but no changes. 6- Seting pool min_size=1 that pg 2.39 belong to it, restart osds that pg import to them but no changes. 7- Repairing failed osds using ceph-objectstore-tools, making “in” and starting them but no changes. # ceph-objectstore-tool --data-path /var/lib/ceph/osd/ceph-x --op repair 8- Repairing 2 unknown pgs, but no changes. # ceph pg repaire 2.39 # ceph pg repair 2.79 9- Forcing recovery 2 unknown pgs, but no changes. # ceph pg force-recovery 2.39 # ceph pg force-recovery 2.79 10- Check PID count in ceph-osd nodes because of osd services failed to start. kernel.pid.max = 4194304 11- Raising osd_op_thread_suicide_timeout=900, but no change.

3 years, 7 months

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Can 16 server grade ssd's be slower then 60 hdds? (no extra journals)

by VELARTIS Philipp Dürhammer

I have a productive 60 osd's cluster. No extra Journals. Its performing okay. Now I added an extra ssd Pool with 16 Micron 5100 MAX. And the performance is little slower or equal to the 60 hdd pool. 4K random as also sequential reads. All on dedicated 2 times 10G Network. HDDS are still on filestore. SSD on bluestore. Ceph Luminous. What should be possible 16 ssd's vs. 60 hhd's no extra journals?

3 years, 7 months

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Migrating Luminous → Nautilus "Required devices (data, and journal) not present for filestore"

by Stuart Longland

Hi all, I'm trying to migrate my 5-node cluster to Nautilus… Debian Stretch (I intend to update this once I'm onto Nautilus) as the OS, all 5 machines are combined OSD/MON/MDS nodes. Nodes were originally deployed with an earlier version of Ceph (can't recall now) using filestore on btrfs. Later, after an abortive attempt to move to Bluestore (it ran… veeeeerrryyy ssslllooowwwlllyyy), I moved back to filestore on xfs, which whilst no speed demon, worked well enough. Journal is on the OSD due to space constraints elsewhere in the nodes. So step 1: > If you are unsure whether or not your Luminous cluster has completed a full scrub of all PGs, you can check your cluster’s state by running: > > # ceph osd dump | grep ^flags > > In order to be able to proceed to Nautilus, your OSD map must include the recovery_deletes and purged_snapdirs flags. Tick to that, I see both flags. Step 2. > Make sure your cluster is stable and healthy (no down or recovering OSDs). (Optional, but recommended.) Tick, all healthy. Step 3. > Set the noout flag for the duration of the upgrade. (Optional, but recommended.): Done Step 4. > Upgrade monitors by installing the new packages and restarting the monitor daemons. Okay, so I update /etc/apt/sources.list.d/ceph.list to point to the `nautilus` repository, `apt-get update`, `apt-get dist-upgrade -y`. This goes without a hitch, I now have Ceph 12 binaries on my nodes. > systemctl restart ceph-mon.target Ran that, on all of them (and yes, they are all in the quorum)… > # ceph mon dump | grep min_mon_release > > should report: > > min_mon_release 14 (nautilus) I get this:> root@helium:~# ceph mon dump | grep min_mon_release > dumped monmap epoch 4 No `min_mon_release` mentioned anywhere. I tried re-starting the MON daemons on all 5 nodes, even doing it in parallel using Ansible… no dice. Nothing says what to do at this point. It's not reporting an earlier release, it's just not reporting full stop. Figuring that, well, I *did* update all the monitors, and re-start them, I press on. Step 5. > Upgrade ceph-mgr daemons by installing the new packages and restarting all manager daemons. Done, no issues. > Verify the ceph-mgr daemons are running by checking ceph -s: I get: > root@helium:~# ceph -s > cluster: > id: 45b532b7-aa3d-4754-9906-d4a70b57630c > health: HEALTH_WARN > noout flag(s) set > > services: > mon: 5 daemons, quorum hydrogen,helium,carbon,nitrogen,boron > mgr: hydrogen(active), standbys: carbon, helium > mds: cephfs-1/1/1 up {0=helium=up:active}, 2 up:standby > osd: 5 osds: 5 up, 5 in > flags noout > > data: > pools: 4 pools, 324 pgs > objects: 302.75k objects, 1.13TiB > usage: 3.52TiB used, 5.53TiB / 9.05TiB avail > pgs: 323 active+clean > 1 active+clean+scrubbing+deep > > io: > client: 45.0KiB/s rd, 1.10MiB/s wr, 1op/s rd, 38op/s wr So far so good. Step 6. > Upgrade all OSDs by installing the new packages and restarting the ceph-osd daemons on all OSD hosts: > systemctl restart ceph-osd.target I actually missed this step at first and went on to step 7, but doubled back and did it. Step 7. > If there are any OSDs in the cluster deployed with ceph-disk (e.g., almost any OSDs that were created before the Mimic release), you need to tell ceph-volume to adopt responsibility for starting the daemons. Okay, seems simple enough. Now I did this by mistake earlier, so I'll force it to ensure everything is up to scratch. > root@hydrogen:~# ceph-volume simple scan --force > stderr: lsblk: /var/lib/ceph/osd/ceph-5: not a block device > stderr: Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected. > Running command: /sbin/cryptsetup status /dev/sdc1 > --> OSD 5 got scanned and metadata persisted to file: /etc/ceph/osd/5-2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe.json > --> To take over managment of this scanned OSD, and disable ceph-disk and udev, run: > --> ceph-volume simple activate 5 2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe > root@hydrogen:~# ceph-volume simple activate --all > --> activating OSD specified in /etc/ceph/osd/5-2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe.json > --> Required devices (data, and journal) not present for filestore > --> filestore devices found: [u'data'] > --> RuntimeError: Unable to activate filestore OSD due to missing devices Uhh ohh? So, my journal is on the OSD itself: > root@hydrogen:~# ls -l /var/lib/ceph/osd/ceph-5/journal > -rw-r--r-- 1 ceph ceph 21474836480 Aug 29 14:16 /var/lib/ceph/osd/ceph-5/journal > root@hydrogen:~# cat /etc/ceph/osd/5-2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe.json > { > "active": "ok", > "ceph_fsid": "45b532b7-aa3d-4754-9906-d4a70b57630c", > "cluster_name": "ceph", > "data": { > "path": "/dev/sdc1", > "uuid": "2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe" > }, > "fsid": "2a1e6a2b-7742-4cd9-9a39-e4a35ebe74fe", > "keyring": "…censored…", > "magic": "ceph osd volume v026", > "ready": "ready", > "require_osd_release": "", > "systemd": "", > "type": "filestore", > "whoami": 5 > } How do I tell it that the journal is on `/dev/sdc1` as a file within the XFS file store? -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere.

3 years, 7 months

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Ceph Filesystem recovery with intact pools

by cyclic3.git＠gmail.com

Hi, I've had a complete monitor failure, which I have recovered from with the steps here: https://docs.ceph.com/docs/mimic/rados/troubleshooting/troubleshooting-mon/… The data and metadata pools are there and are completely intact, but ceph is reporting that there are no filesystems, where (before the failure) there was one. Is there any way of putting the filesystem back together again without having to resort to having to rebuild a new metadata pool with cephfs-data-scan? I'm on ceph version 15.2.4 (7447c15c6ff58d7fce91843b705a268a1917325c) octopus (stable) Thanks, Harlan

3 years, 7 months

4
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ceph-users August 2020