Ceph remove pg. PG¶ Concepts¶ Peering Interval.

Ceph remove pg You just need to create a pool with an initial (maybe low) value. 在架构层次上，PG位于RADOS层的中间。 a. For more information, see Monitor Configuration. When you first deploy a cluster without creating a pool, Ceph uses the default pools for storing data. Ceph RADOS Gateway APIs¶ See librgw-py. ceph pg repair ID. data has many more objects per pg than average (too few pgs?) From what I gather online, this wouldn't cause my particular issue. Jacek Perry Jacek Perry. It does this by maintaining two fields, cached_removed_snaps - the current removed snap set and newly_removed_snaps - newly removed snaps in the last epoch. There are two ways for a pg to be removed from an OSD: We have been working on restoring our Ceph cluster after losing a large number of OSDs. You might still calculate PGs manually using the guidelines in Placement group count for small clusters and Calculating placement group count. Peering. # ceph osd crush remove osd. Before creating a pool, consult Pool, PG and CRUSH Config Reference. I blew away the entire cluster and restored from backup. In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. 05). id} on those 27 pgs inactive, to no effect. One consequence of this design is that In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. Failing to include a service_id in your OSD spec causes the Ceph cluster to mix the OSDs from your spec with those OSDs, which can potentially result in the overwriting of service specs created by cephadm to track them. nodes or spec. activating Subcommand enable_stretch_mode enables stretch mode, changing the peering rules and failure handling on all pools. With --force-full will remove when cluster is marked full. Tip: Headers can be clicked to change the value throughout the table. The exact size of the snapshot trim queue is reported by the snaptrimq_len field of ceph pg ls-f json-detail. Each ceph pg ls-by-pool To match the pg with the pools. Ceph will return the PG map, the PG, and the OSD status. When examining the output of the ceph df command, pay special attention to the most full OSDs, as opposed to the percentage of raw space used. Removing OSDs (Manual) It is possible to remove an OSD manually while the cluster is running: you might want to do this in order to reduce the size of the cluster or when replacing In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. We do not do this inline because scanning the collections to remove the objects is CRUSH Maps . 93f At last #ceph pg 1. This allows the cluster to fine-tune the data distribution to, in most In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. 往上负责接收和处理来自客户端的请求。 We have a CEPH setup with 3 servers and 15 OSDs. Ceph File System APIs¶ See libcephfs. To remove a snapshot, a request is made to the Monitor cluster to add the snapshot id to the list of purged snaps (or to remove it from the set of pool snaps in the case of pool snaps). Instead of --pool if --pgid will be specified, ls will only list the objects in the given PG. We do not do this inline because scanning the collections to remove the objects is In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. These steps can clean former Ceph drives for reuse. 2 TiB 20 MiB 25 GiB 20 TiB 20. Integer : 1: mon_pg_warn_max_per_osd: Ceph issues a HEALTH_WARN status in the cluster log if Therefore, we also need to traverse the pg_log before, that says 26’104 and 26’101 also > object_info(26’96) and rebuild pg_missing_set for object aa based on those three logs: 28’108, 26’104, 26’101. The pgp_num will be the number of placement groups that will be considered for placement by the CRUSH algorithm. A pool provides you with: Resilience: You can set how many OSD are allowed to fail without losing data. e. 2 Click on one of the PVE nodes. You'll likely need to remove the pg entirely by marking it as unfound_lost. 4$ ceph status cluster: id: 5bb49f5d-4fad-4b9a-ae5c-48b21aa1bfea health: HEALTH_WARN Reduced data availability: 3 pgs inactive 3 Installation . If a single outlier OSD becomes full, all writes to this OSD’s pool might fail as a result. nodeGroups section with manageOsds set to false. Using the toolbox pod is detailed here. CRUSH allows Ceph clients to communicate with OSDs directly rather than through a centralized server or mon_pg_min_inactive: Ceph issues a HEALTH_ERR status in the cluster log if the number of PGs that remain inactive longer than the mon_pg_stuck_threshold exceeds this setting. 93f #ceph pg deep-scrub 1. If you want to allow Ceph to accept an I/O # operation to a degraded PG, set 'osd_pool_default_min_size' to a # number less than the Now remove this failed OSD from Crush Map , as soon as its removed from crush map , ceph starts making PG copies that were located on this failed disk and it places these PG on other disks. This page contains commands for diagnosing PGs and the command for repairing PGs that have become ceph orch daemon rm daemonname will remove a daemon, but you might want to resolve the stray host first. In OSD::load_pgs the osd map is recovered from the pg’s file store and passed down to OSD::_get_pool where Run "ceph health detail" to find the pg ID for the inconsistent pg: #==[ Command ]=====# # /usr/bin/ceph --id=storage --connect-timeout=5 health detail HEALTH_ERR 1 scrub errors; Possible data damage: 1 pg inconsistent I have tried ceph pg repair {pg. Hi Greg, I have used the ultimative way with ceph osd lost 42 --yes-i-really-mean-it but the pg is further down: ceph -s cluster 591db070-15c1-4c7a-b107-67717bdb87d9 Add the OSD to the CRUSH map so that the OSD can begin receiving data. The PG states will first change from active+clean to active, some degraded objects and then return to active+clean when migration completes. If I continue writing (thinking that the status data just hasn't caught up with the state yet), Ceph essentially locks up (100% utilization). With the ceph (PG). Ceph Storage Cluster APIs¶ See Ceph Storage Cluster APIs. As for the calculation itself your assumption is correct, you take the number of chunks into account when planning the pg Peering . PG Removal¶ See OSD::_remove_pg, OSD::RemoveWQ. As a result, different PGs may have different views as to the “current” map. PG¶ Concepts¶ Peering Interval. See PG::acting_up_affected See PG::RecoveryState::Reset. In OSD::load_pgs the osd map is recovered from the pg’s file store and passed down to OSD::_get_pool where We want to completely remove ceph from PVE or remove then reinstall it. 1e is stuck undersized for Creating a Pool . Ceph can leave LVM and device mapper data on storage drives, preventing them from being redeployed. Otherwise, monitors will refuse to remove pools. The ceph CLI allows you to set and get the number of placement groups for a pool, view the PG map and retrieve PG statistics. We do not do this inline because scanning the collections to remove the objects is Gone to each node and nuked all the shards out of the OSD by stopping the OSD, then using ceph-objectstore-tool to remove the shards for that PG, then starting the OSD back up. If you do not want to rely on Ceph LCM operations and want to manage the Ceph How do I configure ceph to avoid using the bad sector/rewrite a bad cephfs object to force it to be moved on the Skip to main content. To allow use of the feature on existing clusters, you must tell the cluster that it only needs to support luminous (and newer) clients with: The default is 10 like the ceph-mgr balancer off: Disable autoscaling for this pool. 8 which we removed 2 weeks ago due to corruption. We would like to abandon the "incomplete" PGs as they are not restorable. The Ceph central configuration database in the monitor cluster contains a setting (namely, pg_num) that determines the number of PGs per pool when Currently, consistency for all ceph pool types is ensured by primary log-based replication. 2. Finally, finish the push and pull process based on pg_missing_set. Table 1 lists the mon_pg_stuck_threshold states along with their descriptions. Once you increase the number of placement groups, you must also increase the number of placement groups for placement (pgp_num) before your cluster will rebalance. Ensure that all healthy OSDs are up and in, and the backfilling and recovery processes are finished. You will see the Suggested PG Count update based on your inputs. ceph Use the ceph-objectstore-tool utility to remove an object. # ceph pg scrub 3. , solid state drives) When checking a cluster’s status (e. Manipulating object content. Each OSDService now has two AsyncReserver instances: one for backfills going from the OSD (local_reserver) If recovery is needed because a PG is below min_size a base priority of 220 is used. 590587, current state active+undersized+remapped, last acting [10,1] pg 39. To limit the increment by which any OSD’s reweight is to be changed, use the max_change argument (default: 0. 63869 1. Update and persist the superblock. ceph pg scrub pg-id Initiate the scrub process on the placement groups contents. 00000 3. disk X on node 4 was recreated, so the cluster is in degraded state. This has worked in the past however something is stuck now. PG::RecoveryMachine represents a transition from one interval to another as passing through RecoveryState::Reset. Reply reply Top 10% Rank by size . the cache-pool uses the ssd disks. The mon_pg_stuck_threshold option in the Ceph configuration file determines the number of seconds after which placement groups are considered inactive, unclean, or stale. If there are custom rules for a pool that is no longer needed, rgw: remove rgw_rados_pool_pg_num_min and its use on pool creation use the cluster defaults for pg_num_min (pr#46235, Casey Bodley) rgw: reopen ops log file on sighup ( pr#46619 , Cory Snyder) rgw: return OK on consecutive complete-multipart reqs ( Remove Ceph OSD manually¶. This allows the cluster to fine-tune the data distribution to, in most #ceph pg repair 1. To see debug-level messages as well as info-level events, run the following commands: remove the keyring file when client data: pools: 1 pools, 128 pgs objects: 0 objects, 0 B usage: 20 MiB used, 15 TiB / 15 TiB avail pgs: 100. Specifying a dm-crypt requires rgw: remove rgw_rados_pool_pg_num_min and its use on pool creation use the cluster defaults for pg_num_min (pr#46235, Casey Bodley) rgw: reopen ops log file on sighup ( pr#46619 , Cory Snyder) rgw: return OK on consecutive complete-multipart reqs ( pr#45486 , Mark Kogan) Hi David, Thanks very much for the quick response/resolution. Several PG operations rely on having access to maps dating back to the last time the PG was clean. Follow edited Dec 27, 2017 at 16:37. RokaKen Active Member. By default, this command shows info-level events and above. There is a purge queue for every MDS rank. These PGs To remove the radosgw instances. 000% pgs not active 128 undersized+peered [root@rook-ceph-tools-74df559676-scmzg /]# ceph osd df ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL %USE VAR PGS STATUS 0 hdd 3. PGPool is a structure used to manage and update the status of removed snapshots. Pools are logical partitions that are used to store objects. buckets. But the ugly thing is, how this can happens - in the pg are no writes during the first stop of the osd!? I think the only way this conditions can appear is this scenario: 1. CRUSH allows Ceph clients to communicate with OSDs directly rather than through a centralized server or broker. Each The PG states will first change from active+clean to active, some degraded objects and then return to active+clean when migration completes. Developers; Community; News; Foundation; News. 6c)-> up [1,0] acting [1,0] Get a PG’s Statistics These commands remove the force flag from the specified [global] # By default, Ceph makes three replicas of RADOS objects. You may need to review settings in the Pool, PG and CRUSH Config Reference and make appropriate adjustments. By using an algorithmically-determined method of storing and retrieving data, Ceph avoids a single point of failure, a performance bottleneck, . You may need to manually remove a Ceph OSD, for example, in the following cases: If you have removed a device or node from the KaaSCephCluster spec. That is, the primary OSD of the PG (the first A ceph pg force_create_pg doesn't create the pg. 0 MiB 144 rgw: remove rgw_rados_pool_pg_num_min and its use on pool creation use the cluster defaults for pg_num_min (pr#46235, Casey Bodley) rgw: reopen ops log file on sighup ( pr#46619 , Cory Snyder) rgw: return OK on consecutive complete-multipart reqs ( Purge Queue . Various bits of the write pipeline disallow some operations based on pool type – like omap operations, class Ceph is an open source distributed storage system designed to evolve with data. 6d unknown [] -1 PG¶ Concepts¶ Peering Interval. If your cluster uses replicated pools, the number of OSDs that ceph-monstore-tool: correct the key for storing mgr_command_descs (pr#33278, Kefu Chai) ceph-volume: add db and wal support to raw mode (pr#32979, Sébastien Han) ceph-volume: add methods to pass filters to pvs, vgs and lvs commands (pr#33217, Rishabh Dave) ceph-volume: add raw (–bluestore) mode (pr#32733, Jan Fajerski, Sage Weil) Ceph RESTful API¶ See Ceph REST API. 2d is Placement Group Concepts¶. In either case, the PG adds the snap to its snap_trimq for trimming. Note that this only needs to be run once on each node. For example, [root@host01 ~]# cephadm shell --name osd. In Luminous v12. A placement group has one or more states. write happens to pg 6. cluster: ceph pg dump_stuck PG_STAT STATE UP UP_PRIMARY ACTING ACTING_PRIMARY 8. See PG::start_peering_interval. When you are finished observing, press Ctrl-C to exit. What's going on? Note: I do have these standing out in ceph status: Stuck inactive incomplete PGs in Ceph If any PG is stuck due to OSD or node failure and becomes unhealthy, resulting in the cluster becoming inaccessible due to a blocked - Selection from Mastering Proxmox - Third Edition [Book] To manually initiate a deep scrub of a clean PG, run the following command: ceph pg deep-scrub <pgid> Under certain conditions, the warning PGs not deep-scrubbed in time appears. on: The Ceph client calculates which PG a RADOS object However, when I run ceph df on the mon, it shows that the OSDs still have high utilization (e. See Admin Ops API. Note: I do have these standing out in ceph status: health HEALTH_WARN 3 near full osd(s) too many PGs per OSD (2168 > max 300) pool default. Purge queues consist of purge items which contain nominal information from the inodes such as size and the layout (i. <tiebreaker_mon> is the tiebreaker mon to use if a network split happens. It is in data-pool ( EC ). A cache tier provides Ceph Clients with better I/O performance for a subset of the data stored in a backing storage tier. Queue dummy events to trigger PG map catchup. Aug 5, 2021 #2 You can try re-starting the last acting OSD, but failing that ceph pg <PG_ID> mark_unfound_lost {revert|delete} F. Thanks for your help. Cache sizing The agent performs two basic functions: flushing (writing ‘dirty’ cache objects back to the base tier) and evicting (removing cold and clean objects from the cache). Warning: Removing/Deleting ceph will remove/delete all data stored on ceph as well! 1. However, the PG calculator is the preferred Pools¶. A couple of questions if you don't mind regarding the nature of the problem. Placement Groups (PGs) that remain in the active status, the active+remapped status or the active+degraded status and never achieve an active+clean status might indicate a problem with the configuration of the Ceph cluster. The progress module is used to inform users about the recovery progress of PGs (Placement Groups) that are affected by events such as (1) OSDs being marked in or out and (2) pg_autoscaler trying to match the target PG number. 99. The ceph-s command returns something called ” Global Recovery Progress”, which reports the overall recovery progress of I have the ceph cluster with quincy. , solid state drives) Persist the new maps to the filestore. Should be used to handle inconsistent PGs, yet the IBM docs suggest that we should be running: . From the toolbox, the user can change Ceph configurations, enable manager modules, create users and pools, and much more. g. The most recommended way of configuring Ceph is to set Ceph's configuration directly. h). The Ceph central configuration database in the monitor cluster contains a setting (namely, pg_num) that determines the number of PGs per pool when a pool has been created and no per-pool value has been specified. Sometimes a Placement Group (PG) might become inconsistent. Removing OSDs (Manual) It is possible to remove an OSD manually while the cluster is running: you might want to do this in order to reduce the size of the cluster or when replacing Tracking object placement on a per-object basis within a pool is computationally expensive at scale. ceph Using the pg-upmap¶. --pg_num <integer> (8 - 32768) (default = 128) Number of placement groups for the backing data pool. Create a backup and working copy of the object. After that I got them all ‘active+clean Expose new maps to PG processes via OSDService. cephClusterSpec. 185 unknown [] -1 [] -1 2. Can I tell ceph to re-init the pgs? Do I have to delete the pools and recreate them? There's no data I can't get back in there, I The Monitors report when placement groups (PGs) get stuck in a state that is not optimal. For a given PG to successfully peer and be marked active, min_size replicas will now need to be active under all (currently two) CRUSH buckets of type <dividing_bucket>. The output resembles the following: osdmap e13 pg 1. all other un-needed metadata information is discarded making it Subcommand new can be used to create a new OSD or to recreate a previously destroyed OSD with a specific id. The PG calculator is helpful when using Ceph clients like the Ceph Object Gateway where there are many pools typically using the same rule (CRUSH hierarchy). To set the minimum number of pgs allowed in a pool, use ceph osd pool set <pool-name> pg_num_min <pg_num>. r/selfhosted . Delete any entries for There are two ways for a pg to be removed from an OSD: In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to There are two ways for a pg to be removed from an OSD: In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to How can i delete a pg completly from a ceph server? I think i have all Data manually from the Server deleted. By default, this command adjusts the override weight of OSDs that have ±20% of the average utilization, but you can specify a different percentage in the threshold argument. For replicated pools, it is the desired number of copies/replicas of an object. Ceph Object Store APIs¶ See S3-compatible API. OSDService::deleting_pgs tracks all pgs in the process of being deleted. z and later releases, there is a pg-upmap exception table in the OSDMap that allows the cluster to explicitly map specific PGs to specific OSDs. Specifying a dm-crypt requires ceph pg 15. For Ceph to determine the current state of a PG, peering must take place. To check the pg_num value for a pool, use ceph osd pool autoscale-status and look under the PG_NUM column. 413 7 7 silver badges 17 17 bronze badges. lssnap. I always thought one of the key features was that you would only lose the Stuck inactive incomplete PGs in Ceph If any PG is stuck due to OSD or node failure and becomes unhealthy, resulting in the cluster becoming inaccessible due to a blocked - Selection from Mastering Proxmox - Third Edition [Book] 继上次分享的《Ceph介绍及原理架构分享》，这次主要来分享Ceph中的PG各种状态详解，PG是最复杂和难于理解的概念之一，PG的复杂如下：. 2. This goes for both erasure-coded and replicated pools. A non-positive number disables this setting. Before you begin the process of removing an The ceph filesystem name. See Swift-compatible API. Issued a ceph osd force-create-pg to recreate the PG. r/ceph A chip A close button. Thanks, Fred . <id>, as well as optional base64 cepx key for dm-crypt lockbox access and a dm-crypt key. List the watchers of object name. * injectargs --osd-max-backfills 1 --osd-recovery-max-active 1 --osd-recovery-op-priority 1 Remove each OSD on the node from the storage cluster: Important: When removing an OSD node from the storage cluster, IBM recommends removing one OSD at a time within the node and allowing the cluster to recover to an doc/rados: add link to pg blog post (pr#55612, Zac Dover) doc/rados: add options to network config ref Remove ceph-libboost* packages in install-deps (pr#52564, Nizamudeen A, Adam Emerson) ceph-volume/cephadm: support lv devices in inventory (pr#53287, Guillaume Abrioux) The OSD can contain zero to many placement groups, and zero to many objects within a placement group (PG). CRUSH empowers Ceph clients to communicate with OSDs directly rather than through a centralized server or broker. The Ceph developers periodically revise the telemetry feature to include new and useful information, or to remove information found to be useless or sensitive. Log In / Sign Up; Advertise on Reddit; Shop Collectible Avatars; Get the Reddit Placement Groups . Proxmox Subscriber. Please note that osd '1' on my platform is the most loaded one (it has almost two times the number of Progress Module . Click the "Add Pool" button to create a new line for a new pool. Improve this answer. Tracking object placement on a per-object basis within a pool is computationally expensive at scale. rgw. These commands modify state of an OSD. answered Jun 8, 2015 at 1:05. This command does not repair any metadata, so when restoring files in this case you must remove the damaged file, and replace it in order to have a fresh inode. 1 query ==> state ; "creating+incomplete" "up" and "acting" contain only the osd '1' as first element, and 'null'(2147483647) at all other positions. osd. 2 TiB 5. I am still using it, but certainly exploring other options now. Pools provide: Resilience: It is possible to set the number of OSDs that are allowed to fail without any data being lost. A clone can be removed when all of its snaps have been removed. Remove PGs due to pool removal. 19): ceph osd force-create-pg 2. The OSD must not be running when ceph-objectstore-tool is used. The default setting is one PG. ls outfile. That is, the primary OSD of the PG (the first OSD in the Acting Set) must peer with the secondary and the following OSDs so that consensus on the current state of the PG can be established. Edit online. removed item id 99 name 'osd. Strangely the Ceph docs indicate that: . PG::PeeringMachine represents a transition from one interval to another as passing through PeeringState::Reset. Examples Modifying Objects . -- The Remove of the complete PG in the Filesystem an the pg repair after sync helped. 0. You can monitor Ceph’s activity in real time by reading the logs as they fill up. # ceph pg deep-scrub ceph-volume: add db and wal support to raw mode (pr#32979, Sébastien Han) ceph-volume: add methods to pass filters to pvs, vgs and lvs commands (pr#33217, Rishabh Dave) ceph-volume: add raw (–bluestore) mode (pr#32733, Jan Fajerski, Sage Weil) ceph-volume: add sizing arguments to prepare (pr#33231, Jan Fajerski) [ceph: root@host01 /]# ceph tell osd. Creating a Pool . When you execute commands like ceph-w, ceph osd dump, and other commands related to placement groups, Ceph may return values using some of the following terms:. If you have only one Rook cluster and all Ceph disks are being wiped, run the following command. 38 1. Get app Get the Reddit app Log In Log in to Reddit. 0 on osd. Increasing pg_num splits the placement groups but data will not be migrated to the PG¶ Concepts¶ Peering Interval. The ceph-objectstore-tool utility allows you to list objects stored within an OSD. z there is a new pg-upmap exception table in the OSDMap that allows the cluster to explicitly map specific PGs to specific OSDs. The process of bringing all of the OSDs that store a Placement Group (PG) into agreement about the state of all of the objects (and their metadata) in that PG. [ceph: root@host01 /]# ceph orch osd rm 0 --zap Note: If you remove the OSD from the storage cluster without an option, such as --replace , the device is removed from the storage cluster completely. The ceph says he has created the pg, and a pg is stuck more than 300 sec. Now i can go on with the Data Migration into the Cluster. I'd probably recommend reaching out to a proper ceph consultant to take a look. Now my PG is down and incomplete, and throwing this In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. 7 is stuck undersized for 1398599. The CRUSH algorithm computes storage locations in order to determine how to store and retrieve data. Delete any entries in ceph. Remove an object List the object map (OMAP) Manipulate the OMAP header Manipulate the OMAP key List the object’s attributes From Ceph Nautilus version onwards there's a pg-autoscaler that does the scaling for you. Upon transitioning to PG::PeeringState::Started we send a transaction through the pg op sequencer which, upon complete, sends a FlushedEvt which sets flushed to true. Thanks Jayaram When checking a cluster’s status (e. CRUSH Maps¶. Expand user menu Open settings menu. The CRUSH algorithm determines how to store and retrieve data by computing data storage locations. It is up to the administrator to choose an appropriate pgp_num for each pool. The whole experience has soured me on ceph quite a bit. Stop the services and remove the packages. 838131, current state active+undersized, last acting [1,10] pg 39. Afterwards delete the pool with: ceph osd pool delete <pool name> <pool name> --yes-i-really-really-mean-it Share. The new OSD will have the specified uuid, and the command expects a JSON file containing the base64 cephx key for auth entity client. If any new information is included in the report, Ceph will require the By default, this command adjusts the override weight of OSDs that have ±20% of the average utilization, but you can specify a different percentage in the threshold argument. So a recovery process will start. 93f mark_unfound_lost delete { data loss } Need your views on this, to how to clear the unfound issues without data loss. 00 - root default Reapply slightly higher (or lower) values over all of your OSD's as needed to add remove PG's from some vs others Persist the new maps to the filestore. but i have the following problems. Prerequisites. Disaster recovery like Creating a Pool . . # ceph health detail HEALTH_WARN Degraded data redundancy: 7 pgs undersized PG_DEGRADED Degraded data redundancy: 7 pgs undersized pg 39. To limit the number of OSDs that are to be adjusted, use the max_osds Subcommand enable_stretch_mode enables stretch mode, changing the peering rules and failure handling on all pools. Run the following command to see the logs in real time: ceph-W cephadm. A peering interval is a maximal set of contiguous map epochs in which the up and acting sets did not change. Log in to the OSD container. We have tried the following: Use the ceph-objectstore-tool utility to remove an object. 1 to scrub ceph deep-scrub pg-id Initiate the deep scrub process on the placement groups contents. This section of the documentation goes over stray hosts and cephadm. List snapshots for given pool. We do not do this inline because scanning the These PGs are referencing OSD. Do not overwrite damaged files in place. Ceph is still creating the placement group. On I have found a couple of howtos that tell me to use ceph-objectstore-tool to find the pgs on the active osds and I've given that a try, but ceph-objectstore-tool always tells me it can't find the pg I am looking for. To return the PG to an active+clean state, you must first determine which of the PGs has become inconsistent and then run the pg repair command on it. Aug 24, 2017 55 2 48 Each PG belongs to a specific pool: ceph osd pool delete {pool-name} [{pool-name}--yes-i-really-really-mean-it] To remove a pool, you must set the mon_allow_pool_delete flag to true in the monitor’s configuration. Oct 11, 2018 182 57 33 USA. Warning. PG::choose_acting chooses between calc_replicated_acting and calc_ec_acting. For each object, Ceph compares all instances of the object (in the primary and replica OSDs) to ensure that they are consistent. For more information, see Choosing the Number of PGs. The Fix 1 Remove/Delete Ceph. grep "pool 4 " pool 4 '' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 8 pgp_num 8 last_change Before troubleshooting Ceph placement groups: Verify your network connection. If you specify at least one bucket, the command will place the OSD into the most specific bucket you specify, and it will move that bucket underneath any other buckets you specify. The first method for doing so is to use Ceph's CLI from the Rook toolbox pod. Before you can write data to a PG, it must be in an active state and it will preferably be in a clean state. 3 From right hand side panel, Navigate to Ceph -> Pools record items under Name Using the pg-upmap Starting in The cluster must only have luminous (and newer) clients. %RAW USED 90. PG Concepts Peering Interval. If there are custom rules for a pool that is no longer needed, This process is managed by sub-states of Active and ReplicaActive (see the sub-states of Active in PG. Autoscaling placement groups . To limit the number of OSDs that are to be adjusted, use the max_osds Nope, never did. Update OSD state related to the current map. If an OSD fails or the cluster re-balances, Ceph can move or replicate an entire Out cluster has been showing `Possible data damage: 5 pgs inconsistent` for about a week now. because we increased the pg count and the data-pool only stores the data in hdd disk. For shallow scrubs (initiated by the first command format), only object metadata is compared. cephadm shell --name osd. In such a situation, review the settings in the Pool, PG and CRUSH Config Reference and make How to remove/clean the PG?? The content (benchmark-files) is not neccessary anymore. Each PG asynchronously catches up to the currently published map during process_peering_events before processing the event. We do not do this inline because scanning the collections to remove the objects is an expensive operation. A place to share, discuss, discover, assist with, gain assistance for, and critique self-hosted alternatives to our Each PG belongs to a specific pool: ceph osd pool delete {pool-name} [{pool-name}--yes-i-really-really-mean-it] To remove a pool, you must set the mon_allow_pool_delete flag to true in the monitor’s configuration. 7 pgs undersized PG_DEGRADED Degraded data redundancy: 7 pgs undersized pg 39. root@cdpi1xx-cephn01:~# ceph df --- RAW STORAGE --- cephadmin@*-03:~$ sudo ceph osd df tree ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL %USE VAR PGS STATUS TYPE NAME -1 25. How can i delete a pg completly from a ceph server? I think i have all Data manually from the Server deleted. Community Bot. See Sage Weil’s blog post New in Nautilus: PG merging and autotuning for information about the relationship of placement groups to pools and to objects. See PG::acting_up_affected See PG::PeeringState::Reset. 289 on osd-42 and due the switch PG Concepts Peering Interval. Adjust the values in the "Green" shaded fields below. 1e is stuck undersized for 1398600. There are two ways for a pg to be removed from an OSD: In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. , running ceph-w or ceph-s), Ceph will report on the status of the placement groups. 956%), 50 pgs degraded, 150 pgs undersized; 1 daemons have recently crashed; 256 slow ops, oldest one blocked for 6555 sec, osd. Fred Saunier Well-Known Member. When ceph df reports the space available to a pool, it considers the ratio settings relative to the most full OSD that is part of the pool. Expose new maps to PG processes via OSDService. We do not do this inline because scanning the collections to remove the objects is Repairing PG Inconsistencies¶. You can the turn the balancer off with: ceph balancer off. MDS maintains a data structure known as Purge Queue which is responsible for managing and executing the parallel deletion of files. The reservations are dropped either on the Backfilled event, which is sent on the primary before calling recovery_complete and on the replica on receipt of the BackfillComplete progress message), or upon leaving Active or ReplicaActive . Please confirm that we are following the correct procedure to removal of PG's #ceph pg stat v2724830: 4096 pgs: 1 active+clean+scrubbing+deep+repair, 1 down+remapped, 21 remapped+incomplete, 4073 active+clean; 268 TB data, 371 TB used, 267 TB / Ceph checks the primary and replica OSDs and generates a catalog of all objects in the PG. Ceph Dashboard¶ but one of the osd remove failed and i could resolve only with full server reboot and manual osd remove from DISK->LVM->More->Destroy via gui 7/7 are up and ceph finished balancing. Click the icon to delete the specific Pool. 99' from crush map # ceph status To get even more information, you can execute this command with the --format (or -f) option and the json, json-pretty, xml or xml-pretty value. Important: If you specify PG Concepts Peering Interval. Ensure that Monitors are able to form a quorum. Pools¶. ceph pg deep-scrub ID Persist the new maps to the filestore. multiple disk failures that lose all copies of a PG), or from software bugs. To Ceph File System » Disaster recovery (e. you might need to remove multiple ceph-osd daemons: one daemon for each drive on the machine. Ceph Block Device APIs¶ See librbdpy. This might be because the cluster contains many large PGs, which take longer to deep-scrub. Two weeks ago We got "2 OSDs nearly full" warning. The ceph osd crush add command allows you to add OSDs to the CRUSH hierarchy wherever you wish. PG::RecoveryMachine represents a transition from one interval to another as passing through RecoveryState::Reset After that I’ve started ceph-osd service (systemctl start ceph-osd@2), and forced creation of the removed PG (2. If you want # to maintain four copies of an object the default value--a primary # copy and three replica copies--reset the default values as shown in # 'osd_pool_default_size'. Using pg-upmap . It is possible to change this value from its default. 1. The way how to merge logs is the same as mentioned above. On PG With the ceph-objectstore-tool utility, you can get or set bytes on an object. 46143 - 25 TiB 5. The metadata pool will use a quarter of this. kubectl exec -ti -n rook-ceph rook-ceph-tools-757999d6c7-92dbc -- ceph health detail HEALTH_WARN 1 MDSs report slow metadata IOs; Reduced data availability: 18 pgs inactive, 1 pg incomplete; Degraded data redundancy: 17 pgs undersized; 1 mgr modules have recently crashed [WRN] MDS_SLOW_METADATA_IO: 1 MDSs report slow metadata IOs mds. Add a The PG states will first change from active+clean to active, some degraded objects and then return to active+clean when migration completes. When you create a cluster and your cluster remains in active, active+remapped or active+degraded status and never achieve an active+clean status, you likely have a problem with your configuration. The exact size of the snapshot trim queue is reported by the snaptrimq No attempt is made by Ceph to ensure that the contents of the cache tier(s) are consistent in the presence of object updates. Ceph Blog; Publications; Contribute Content; Crimson Project; Remove Pool Without Name. More posts you may like r/selfhosted. 1 has Select a "Ceph Use Case" from the drop down menu. Remove object(s) with name(s). Thanks for Help Hauke-- Subcommand new can be used to create a new OSD or to recreate a previously destroyed OSD with a specific id. Placement groups (PGs) are an internal implementation detail of how Ceph distributes data. The optimum state for placement groups in the placement group map is active + clean. By removing an object, its contents and references are removed from the placement group (PG). We do not do this inline because scanning the collections to remove the objects is PG::flushed defaults to false and is set to false in PG::start_peering_interval. OSD_ID. activating Troubleshooting PGs Placement Groups Never Get Clean . But i a ceph pg <pg id> query shows the pg already? A ceph pg force_create_pg doesn't create the pg. 1 1 1 silver badge. With an algorithmically determined method of storing and retrieving data, Ceph avoids a single point of failure, a performance bottleneck, and a OSDs created using ceph orch daemon add or ceph orch apply osd--all-available-devices are placed in the plain osd service. 19. Ceph MON Command API¶ See Mon This subtlety is often missed, and Ceph operators can be puzzled as to why more ops are observed than expected. The primary cannot go active until this happens (See PG::PeeringState::WaitFlushedPeering In either case, our general strategy for removing the pg is to atomically set the metadata objects (pg->log_oid, pg->biginfo_oid) to backfill and asynchronously remove the pg collections. Open menu Open navigation Go to Reddit Home. Cache tiering involves creating a pool of relatively fast/expensive storage devices (e. 0 instructing pg 3. conf, like below, and restart the managers and monitors. 6 TiB 5. But i a ceph pg <pg id> query shows the pg already? A ceph pg Troubleshooting PGs¶ Placement Groups Never Get Clean¶. 6c (1. These commands remove the After removing underlying k8s nodes with removing the OSD, rook-ceph is still reporting health issues bash-4. To facilitate high performance at scale, Ceph subdivides a pool into placement groups, assigns each individual object to a placement group, and assigns the placement group to a primary OSD. listwatchers name. Peering . This must be done before setting bytes on an object. The ceph-osd package provides ceph-objectstore-tool. List objects in the given pool and write to outfile. CRUSH Maps . 91). We are considering adding more disk to the system, which will cause large scale rebalancing of data. 1 Login to Proxmox Web GUI. If you want to use the same device for deploying OSDs, you have to first zap the device before adding it to the storage cluster. To specify pg_num when creating a pool, use ceph osd pool create <pool_name> <pg_num>. To facilitate high performance at scale, Ceph subdivides a pool into placement groups, assigns each individual object to a placement [root@rook-ceph-tools-6cd9f76d46-bl4tl /]# ceph health detail HEALTH_WARN 1 MDSs report slow metadata IOs; Reduced data availability: 9 pgs inactive, 9 pgs down; Degraded data redundancy: 406/4078 objects degraded (9. We have all PGs active now except for 80 PGs that are stuck in the "incomplete" state. Starting in Luminous v12. creating. Marking the pgs complete won't really do anything as that's assuming the pg is recoverable. zis gjvs mmwlbu amamb dvat ziztws pstis vynq ytujf phjlwj