Ceph: OSD "down" and "out" of the cluster - An obvious case. When setting up a cluster with ceph-deploy, just after the ceph-deploy osd activate phase and the distribution of keys, the OSDs should be both “up” and “in” the cluster. So let's go ahead and remove osd. HI,everyone: We have three hosts installed pve operating system, Each host has 4 hard drives (two hard-configured raid1s, installed operating system, and two as osd disk)。the ceph size set three and min_size set two。 tody,Osd status was found down today。 The Proxmox vesrion: 5. The cluster should not be at its near-to-full ratio. ceph health detail HEALTH_ERR 1 full osd (s); 1 backfillfull osd (s); 1 nearfull osd (s) osd. This size did not change when i turned on Autoscale on SSD pool, only the smaller for HDD and test. When it came back online the Ceph cluster started to recover from it and rebalance the cluster. 9 # ceph osd crush remove osd. You should marked it as out, which means assigning a weight of 0 to the OSD. Active 4 years, 9 months ago. 14639 host ceph01 0 0. ceph osd tree down If there is a drive failure or other fault preventing ceph-osd from functioning or restarting, an error message should be present in its log file under /var/log/ceph. Pair of PE2950s and a old Optiplex for quorum. Remove the OSDs from the CRUSH map. For this, log in to any of the cluster nodes and perform the following commands: # ceph osd crush remove osd. ceph osd down osd. 00000 > 1 0 osd. 12 Click on master node, from right hand side panel, Navigate to Ceph -> OSD, Click on the OSD to be removed, Click on More button from top right corner, Click on Destroy. Then select the OSD to destroy and click the OUT button. 00000 > 5 0 osd. Disable Ceph Storage cluster rebalancing temporarily: $ sudo ceph osd set noout $ sudo ceph osd set norebalance. When a ceph-osd process dies, the monitor will learn about the failure from surviving ceph-osd daemons and report it via the ceph health command: $ ceph health HEALTH_WARN 1/3 in osds are down Specifically, you will get a warning whenever there are ceph-osd processes that are marked in and down. Got it up and working fine, but when we had power issues in the server room, the cluster got hard powered down. As I don't have enough physical servers, I create 4 VMs on my OpenStack using official Ubuntu 14. [[email protected] /]# cat /etc/ceph/ceph. Viewed 5k times 3 2. Therefore, the first step you should do for such an OSD is to understand why it is marked as "down" (node is down, OSD daemon is not running and so on). (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. Chapter 14. You immediatly notice that the status changed. 11 Mark OSD down. I want to deploy a cluster. sudo systemctl stop [email protected]{osd-num} Now the OSD is down. Machine Teuthology Branch OS Type OS Version Nodes Status; 2021-07-30 12:01:13 2021-07-30 12:42:49 2021-07-30 13:03:51. Start the Ceph cluster nodes. 9 # ceph osd out osd. Active 7 months ago. ceph health detail HEALTH_ERR 1 full osd (s); 1 backfillfull osd (s); 1 nearfull osd (s) osd. OSD removal can be automated with the example found in the rook-ceph-purge-osd job. Rook will automate creation and management of OSDs to hide the complexity based on the desired state in the CephCluster CR as much as possible. Ceph: OSD “down” and “out” of the cluster – An obvious case. After the time interval set by mod osd down out interval, ceph marks it out and starts data migration recovery. Morning friends. 220:6800/11080; ceph-osd デーモンを再起動します。 systemctl restart [email protected] を down になっている OSD の ID で置き換えます。例を示します。. The osd tree always shows down when I request command ceph --cluster cephcluster1 osd tree. [ceph-users] Re: Ceph cluster not recover after OSD down. Now use the following commands. So the OSD is where your data is stored, and they also handle things like rebalancing and replication. 1 (Rook) and 15. Cluster Ceph 4 nodes, 24 OSD (mixed ssd and hdd), ceph Nautilus 14. One or more OSDs are marked down. Start the Ceph cluster nodes. The recovery_state section tells us that peering is blocked due to down ceph-osd daemons, specifically osd. 133589 ceph-osd. 220:6800/11080. The storage device is normally used as a whole, occupying the full device that is managed directly by BlueStore. I had delete the ceph cluster but cleanup all the kubernetes instance which were created by ceph cluster, but it did't delete the osd block which is mounted into sdb. Recommended values for mon osd down out in ceph. Hello, I have setup two separate Ceph clusters with RGW instance each and trying to achieve multisite data synchronization. 00000 > 2 0 osd. Following are the commands and corresponding results that may be related to my problem. I am trying to install and deploy a ceph cluster. Hello, we are currently experiencing problems with ceph pg repair not working on Ceph Nautilus 14. A pool maps to a CRUSH ruleset. 78Mb/s is not much when you have a 500TB Cluster. If the daemon stopped because of a heartbeat failure or suicide timeout, the underlying drive or filesystem may be unresponsive. 4 /dev/sdd ceph-5a34e8e4-c7c7-42fd-83ee-e2409563fe54 lvm2 a-- <1,82t 0 --> Osd. Remove the OSD entry from your ceph. 14639 host ceph02 1 0. 00000 > 1 0 osd. 07570 host worker2 0 ssd 0. And why the osd block. 024%), 84 pgs degraded, 122 pgs undersized services: mon: 2 daemons, quorum node140,node142 (age 3d. 11 If you see "osd. First, we need to remove the OSD authentication key. $ ceph osd dump | grep ^osd. Following is the log seen in the OSD node 2019-0. Ceph health shows "HEALTH_OK", `ceph osd tree` outputs: > > ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF > -1 0 root default > 0 0 osd. See full list on ubuntu. Bringing an OSD out and down from a Ceph cluster Before proceeding with a cluster's size reduction or scaling it down, make sure the cluster has enough free space to accommodate all the data present on the node you are moving out. Once the OSD status has changed from in to out, click the STOP button. ceph -s: cluster: id: 9e802d76-86bf-458a-a819-8bb9c247ba21 health: HEALTH_ERR 1 filesystem is degraded 2 MDSs report slow metadata IOs 2 osds down 1 host (3 osds) down 7134/217612 objects misplaced (3. 37:6804/16852 172. 015390 2020-01-15 11:58:22. Andres Rojas Guerrero Wed, 05 May 2021 06:12:05 -0700. Now use the following commands. Suggestions cannot be applied while the pull request is closed. If it says ‘ Error EBUSY: osd. 0 becomes primary, but the PG is 'down' because osd. 0 is down since epoch 23, last address 192. [email protected]:~ # ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0. 00000 > 6 0 osd. By default, two Ceph OSD Daemons from different hosts must report to the Ceph Monitors that another Ceph OSD Daemon is down before the Ceph Monitors acknowledge that the reported Ceph OSD Daemon is down. When a drive fails, Ceph reports the OSD as down: HEALTH_WARN 1/3 in osds are down osd. Machine Teuthology Branch OS Type OS Version Nodes Status; 2021-07-30 12:01:13 2021-07-30 12:42:49 2021-07-30 13:03:51. When a ceph-osd process dies, the monitor will learn about the failure from surviving ceph-osd daemons and report it via the ceph health command: $ ceph health HEALTH_WARN 1/3 in osds are down Specifically, you will get a warning whenever there are ceph-osd processes that are marked in and down. radosgw and all the daemons are running on the same node, and everything was working fine. Then select the OSD to destroy and click the OUT button. Replace with the ID of the OSD that is marked as down, for example: # ceph osd rm osd. Cluster Ceph 4 nodes, 24 OSD (mixed ssd and hdd), ceph Nautilus 14. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. I can't understand why err = 0 was used in some cases and it may be a sign that I overlooked something of importance. Ceph Monitor nodes. Identify which ceph-osds are down with: [email protected] > ceph health detail HEALTH_WARN 1/3 in osds are down osd. The storage device is normally used as a whole, occupying the full device that is managed directly by BlueStore. Once the OSD status has changed from in to out, click the STOP button. The recovery_state section tells us that peering is blocked due to down ceph-osd daemons, specifically osd. So to remove the OSD from the CRUSH map we use the command, ceph osd crush remove {name} And, to. 1] host = {hostname} From the host where you keep the master copy of the cluster's ceph. OSD removal can be automated with the example found in the [rook-ceph-purge-osd job]. # ceph health detail HEALTH_WARN 1/3 in osds are down osd. After this you can easily bring down your OSD. After about 2 days of trying to resolve this issue and banging my head against the wall, an other person's question to the similar issue on ceph's IRC channel, has led me to a solution: sudo systemctl start -l [email protected]#. Got a prototype PVE cluster. After full cluster restart, even though all the rook-ceph pods are UP, ceph status reports one particular OSD (here OSD. 14639 host ceph02 1 0. ceph health detail HEALTH_ERR 1 full osd (s); 1 backfillfull osd (s); 1 nearfull osd (s) osd. 9 # ceph osd crush remove osd. ceph tell 'osd. Aug 11, 2021 · watch ceph -s Verification. Hello, I have setup two separate Ceph clusters with RGW instance each and trying to achieve multisite data synchronization. 10 # ceph osd out osd. 1 (Rook) and 15. Pastebin is a website where you can store text online for a set period of time. ssh {admin-host} cd /etc/ceph vim ceph. num_up_osds metrics in Sysdig Monitor for alerting when this happens. If the OSD is down, Ceph marks it as out automatically after 600 seconds when it does not receive any heartbeat packet from the OSD. Also make note of the ceph-osd unit being queried (here: ceph-osd/0): OSD_UNIT=ceph-osd/ Discover the disk by-dname entry. 14639 host ceph01 0 0. Ceph - slow recovery speed. 3 /dev/sdc ceph-c51f4b74-daba-4417-abd4-a977e94a8126 lvm2 a-- <7,28t 0 --> Osd. 10 # ceph osd crush remove osd. The osd tree always shows down when I request command ceph --cluster cephcluster1 osd tree. Problem was, it was dead slow. 2, Ceph with 3 OSD, 1 MON running on a same node. It is seen that the OSD process is running. num_in_osds and ceph. 220:6800/11080; ceph-osd デーモンを再起動します。 systemctl restart [email protected] を down になっている OSD の ID で置き換えます。例を示します。. 11 is already out" — it's ok. Ceph: OSD "down" and "out" of the cluster - An obvious case. Mark it 'out': ceph osd out osd. 00000 > 3 0 osd. Following are the commands and corresponding results that may be related to my problem. If an Ceph OSD Daemon doesn't report to a Ceph Monitor, the Ceph Monitor will consider the Ceph OSD Daemon down after the mon osd report timeout elapses. ceph health detail is showing us an inconsistent pg: [aaaaax-yyyy ~]# ceph health detail HEALTH_ERR 1 scrub errors; Possible data damage: 1 pg inconsistent OSD_SCRUB_ERRORS 1 scrub errors PG_DAMAGED Possible data damage: 1 pg inconsistent pg 18. PV VG Fmt Attr PSize PFree /dev/sdb ceph-a228cec5-405a-458d-9a41-201db41ea392 lvm2 a-- <7,28t 0 --> Osd. Adding OSDs¶. • General advice: keep ceph -w open in another window when changing options. We cannot simply remove the OSD. 00000 > 2 0 osd. With Ceph, an OSD is generally one Ceph ceph-osd daemon for one storage drive within a host machine. Ceph: OSD "down" and "out" of the cluster - An obvious case. 37:6801/16852 172. First i was started to update Ceph with status "health OK", but OSDs didn't start to update, the Operator pod was saying that it can't update OSD and will try later (it retried over and over). Hello, we are currently experiencing problems with ceph pg repair not working on Ceph Nautilus 14. 11 Mark OSD down. 14639 host ceph02 1 0. When a ceph-osd process dies, the monitor will learn about the failure from surviving ceph-osd daemons and report it via the ceph health command: ceph health HEALTH_WARN 1/3 in osds are down Specifically, you will get a warning whenever there are ceph-osd processes that are marked in and down. Cluster Ceph 4 nodes, 24 OSD (mixed ssd and hdd), ceph Nautilus 14. But then again, it also depends on your actual configuration (ceph osd tree) and rulesets. ceph osd out osd. To start a Ceph cluster after maintenance: Log in to the Salt Master node. PGs will get a degraded state because the noout option prevents the OSD to be marked out of the cluster. I am a beginner in kubernetes. [[email protected] /]# cat /etc/ceph/ceph. There does seem to be something actually wrong with osd. Also, we remove the OSD from the OSD map, and from the ceph. It is seen that the OSD process is running. Identify which ceph-osds are down with: [email protected] > ceph health detail HEALTH_WARN 1/3 in osds are down osd. Ceph OSD Management. 20 (If you see "osd. The ceph-osd daemon may have been stopped, or peer OSDs may be unable to reach the OSD over the network. 0 is down since epoch 23, last address 192. 220:6800/11080. Monitor with "ceph -s". 11; Remove it: ceph osd rm. If osd's start restarting, then reduce the values. Replace with the ID of the OSD that is marked as down, for example: # ceph osd rm osd. Suggestions cannot be applied while the pull request is closed. When an OSD goes down, its contents may fall behind the current state of other replicas in the placement groups. Ask Question Asked 6 years, 5 months ago. 1 (via proxmox 6, 7 nodes). ceph tell 'osd. Let's create an alert as if there's an OSD down: ceph_osd_up == 0 When OSD starts up, it peers at other OSD daemons in the cluster to synchronize with them and recover more recent versions of objects and placement groups. Ceph OSD down 問題トラブルシュート手法. 00000 > 3 0 osd. At the next moment, osd. 29279 root default -2 0. 2 is down since epoch 16, last address 9. log:2016-05-04 20:42:35. If the daemon stopped because of a heartbeat failure or suicide timeout, the underlying drive or filesystem may be unresponsive. When a ceph-osd process dies, the monitor will learn about the failure from surviving ceph-osd daemons and report it via the ceph health command: $ ceph health HEALTH_WARN 1/3 in osds are down Specifically, you will get a warning whenever there are ceph-osd processes that are marked in and down. Dec 03, 2019 · pg down 的意思是含有最新数据 pg 的对应的 osd 没起来,最简单的做法就是将该 osd 拉起来,但如果该 osd 实在拉不起来且已经把它移出集群了,则可以告诉集群那个主 pg 的 osd 已经丢失了,让其它副本的 pg 作为主 osd ,比如 osd. 220:6800/11080; ceph-osd デーモンを再起動します。 systemctl restart [email protected] を down になっている OSD の ID で置き換えます。例を示します。. If the OSD is marked as "down", then it simply means that other OSDs or the Ceph Monitors have not received answers to their heartbeats from that specific OSD. After it's down it cannot be restarted via ceph commands. Viewed 2k times 0 I am trying to install and deploy a ceph cluster. See full list on ubuntu. Replace with the ID of the OSD that is marked as down, for example: # ceph osd rm osd. Each OSD manages a local device and together they provide the distributed storage. After about 2 days of trying to resolve this issue and banging my head against the wall, an other person's question to the similar issue on ceph's IRC channel, has led me to a solution: sudo systemctl start -l [email protected]#. And anyway I guess that your proposed get_min_last_epoch_clean patch is equivalent to what we have today if we restart the ceph-mon leader while an osd is down. Customer needs to speed up or slow down osd backfilling. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. 11 If you see "osd. [ceph-users] Re: Ceph cluster not recover after OSD down. Aug 14, 2020 · [ceph-users] Re: osd fast shutdown provokes slow requests Dan van der Ster Fri, 14 Aug 2020 05:03:48 -0700 Hi, I suppose the idea is that it's quicker to fail via the connection refused setting than by waiting for an osdmap to be propagated across the cluster. The following factors typically affect a storage cluster's performance when adding or removing Ceph OSD nodes: Ceph clients place load on the I/O interface to Ceph; that is, the clients place load on a pool. Ceph OSD down 問題トラブルシュート手法. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. After reboot the server, all osd could not communicate (looks like) and the radosgw does not work properly, it's log. By default, this parameter is set to 0. This suggestion is invalid because no changes were made to the code. 2 hosts (include 6 osds) down in my cluster and after I delete the osd pod, it will restart and still mark as down. Therefore, the first step you should do for such an OSD is to understand why it is marked as "down" (node is down, OSD daemon is not running and so on). 21 um 11:44 schrieb Andres Rojas Guerrero: > I have in the cluster 768 OSD, it is enough that 32 (~ 4%) of them (in > the same node) fall and the information becomes inaccessible. 5 已经起不来了则:. For this, log in to any of the cluster nodes and perform the following commands: # ceph osd crush remove osd. 0; ceph status, ensure cluster is healthy and recovery is complete. Following is the log seen in the OSD node. We cannot simply remove the OSD. Pastebin is a website where you can store text online for a set period of time. 1 --osd_max_scrubs=1 • Not all options can be set at run-time. 20 is already out" — it's ok. Jan 11, 2016 · In ceph cluster I created in previous post, I used kvm, and I as OSD here I am going to use virtual disk attached to KVM machine. radosgw and all the daemons are running on the same node, and everything was working fine. The osd tree always shows down when I request command ceph --cluster cephcluster1 osd tree. This is what I get from cephadm logs for the specific OSDin fact all OSDs on that host. 37:6801/16852 172. Start the Ceph cluster nodes. So let's go ahead and remove osd. conf file (if it exists). The cluster should not be at its near-to-full ratio. ceph osd out osd. Ceph: OSD "down" and "out" of the cluster - An obvious case. We can mark them down and destroy in one command. Hello, we are currently experiencing problems with ceph pg repair not working on Ceph Nautilus 14. Caveat ¶ Never take down too many OSDs at the same time, because this may result in number of copies for some data to fall below "osd pool default min size", in which case data consistency or integrity might not be. You can however also set the noout flag per OSD basis using this command:. This allows the Ceph OSD daemon to recover from unexpected outages, without losing data. conf file placed in /etc/ceph path. ceph osd down osd. 00000 > 1 0 osd. 20 though - even if I restart osd. [email protected]:~ # ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0. Jan 11, 2016 · In ceph cluster I created in previous post, I used kvm, and I as OSD here I am going to use virtual disk attached to KVM machine. • General advice: keep ceph -w open in another window when changing options. > > Wouldn’t running “journalctl -u [email protected]” on host ceph-004 show me the logs > for osd. Following is the log seen in the OSD node 2019-0. Trying to fix it we reinstalled a few down osd (that was a mistake, I agree) and destroy the datas on it. 07570 host worker2 0 ssd 0. ceph osd down # e. Hello, we are currently experiencing problems with ceph pg repair not working on Ceph Nautilus 14. This size did not change when i turned on Autoscale on SSD pool, only the smaller for HDD and test. I'm trying to upgrade rook and ceph to latest versions from 1. The storage device is normally used as a whole, occupying the full device that is managed directly by BlueStore. Purge the OSD from the Ceph cluster. The ceph-osd daemon may have been stopped, or peer OSDs may be unable to reach the OSD over the network. PV VG Fmt Attr PSize PFree /dev/sdb ceph-a228cec5-405a-458d-9a41-201db41ea392 lvm2 a-- <7,28t 0 --> Osd. Dec 03, 2019 · pg down 的意思是含有最新数据 pg 的对应的 osd 没起来,最简单的做法就是将该 osd 拉起来,但如果该 osd 实在拉不起来且已经把它移出集群了,则可以告诉集群那个主 pg 的 osd 已经丢失了,让其它副本的 pg 作为主 osd ,比如 osd. When the data migration is done make sure the cluster is in healthy state, and the amount of OSD’s in the cluster match the amount previously in the cluster. If ceph has enough time and space to recover a failed OSD then your cluster could survive two failed OSDs of an acting set. Problem was, it was dead slow. log:2016-05-04 20:42:35. Error: on logs: grep 'void Thread::create(size_t)' *|grep -v '>'|grep " 20:" ceph-osd. Ceph can mark an OSD as down also as a consequence of networking or permissions problems. 113:6800/1654. 11; Remove it: ceph osd rm. 220:6800/11080. The process of removing OSDs from a Ceph cluster involves removing all the entries of these OSDs from cluster maps. For this, log in to any of the cluster nodes and perform the following commands: # ceph osd crush remove osd. [email protected]:~ # ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0. Next Last 1. And why the osd block. Let’s create disk we are going to use for OSD. num_up_osds metrics in Sysdig Monitor for alerting when this happens. When the data migration is done make sure the cluster is in healthy state, and the amount of OSD’s in the cluster match the amount previously in the cluster. Aug 11, 2021 · watch ceph -s Verification. 'ceph -s' コマンドでCephのステータスを確認すると以下の表示になってます。. # qemu-img create -f qcow2 cephf23-node1disk1. From any of the Ceph nodes, take the OSDs out of the cluster: # ceph osd out osd. Common causes include a stopped or crashed daemon, a down host, or a network outage. radosgw and all the daemons are running on the same node, and everything was working fine. So, in general, it takes around 20 seconds to detect OSD down and the Ceph cluster Map is updated, only after this VNF can use a new OSD. 183548 7f8a7d63f700 -1 common/Thread. ceph> osd tree down ID CLASS WEIGHT TYPE NAME STATUS -9 0. We cannot simply remove the OSD. 14639 host ceph01 0 0. HI,everyone: We have three hosts installed pve operating system, Each host has 4 hard drives (two hard-configured raid1s, installed operating system, and two as osd disk)。the ceph size set three and min_size set two。 tody,Osd status was found down today。 The Proxmox vesrion: 5. 0 removed osd. Next Last 1. Caveat ¶ Never take down too many OSDs at the same time, because this may result in number of copies for some data to fall below “osd pool default min size”, in which case data consistency or integrity might not be. If ceph has enough time and space to recover a failed OSD then your cluster could survive two failed OSDs of an acting set. This is what I get from cephadm logs for the specific OSDin fact all OSDs on that host. Aug 11, 2021 · watch ceph -s Verification. See Down OSDs for details. We can mark them down and destroy in one command. For this, log in to any of the cluster nodes and perform the following commands: # ceph osd crush remove osd. See full list on ubuntu. The cluster should not be at its near-to-full ratio. Rebooting Ceph Storage Nodes. Rebooting Ceph Storage Nodes. The process of removing OSDs from a Ceph cluster involves removing all the entries of these OSDs from cluster maps. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. Also, we remove the OSD from the OSD map, and from the ceph. In order to reduce the impact, you can turn it off first, and then turn it on after the replacement of the hard disk is completed. With Ceph, an OSD is generally one Ceph ceph-osd daemon for one storage drive within a host machine. ’ that means OSD is not dead yet. ceph osd down and rgw Initialization timeout, failed to initialize after reboot. 37:6804/16852 172. Mark it 'out': ceph osd out osd. Replace with the ID of the OSD that is marked as down, for example: # ceph auth del osd. conf file (if it exists). 4 /dev/sdd ceph-5a34e8e4-c7c7-42fd-83ee-e2409563fe54 lvm2 a-- <1,82t 0 --> Osd. 2-9 installed. It is seen that the OSD process is running. 20 though - even if I restart osd. 1 (via proxmox 6, 7 nodes). On large(r) cluster this isn't always what you want as you might be performing maintenance on a part of the cluster, but you sill want other OSDs which go down to be marked as out. If your host has multiple drives, you may need to remove an OSD for each drive by repeating this procedure. See full list on ubuntu. 135375 7fbd54ea7700 -1 common/Thread. 14639 host ceph02 1 0. Onsite at customer they had a 36bays OSD node down in there 500TB cluster build with 4TB HDDs. Problem was, it was dead slow. Remove the OSDs from the CRUSH map. Ask Question Asked 8 months ago. Ceph OSD Management. Add this suggestion to a batch that can be applied as a single commit. The 2950s have a 2tb secondary drive (sdb) for CEPH. As we need to scale down the cluster, we will remove ceph-node4 and all of its associated OSDs out of the cluster. Ceph: OSD “down” and “out” of the cluster – An obvious case. Also make note of the ceph-osd unit being queried (here: ceph-osd/0): OSD_UNIT=ceph-osd/ Discover the disk by-dname entry. from the toolbox. OSD removal can be automated with the example found in the [rook-ceph-purge-osd job]. Rebooting Ceph Storage Nodes. 1 to come back so that the PG will work again. Active 4 years, 9 months ago. OSD down/out. ceph osd down 0 ceph osd down 1 ceph osd down 2. Aug 14, 2020 · [ceph-users] Re: osd fast shutdown provokes slow requests Dan van der Ster Fri, 14 Aug 2020 05:03:48 -0700 Hi, I suppose the idea is that it's quicker to fail via the connection refused setting than by waiting for an osdmap to be propagated across the cluster. It is seen that the OSD process is running. 1 had the last data. 'ceph -s' コマンドでCephのステータスを確認すると以下の表示になってます。. Common causes include a stopped or crashed daemon, a down host, or a network outage. Aug 14, 2020 · [ceph-users] Re: osd fast shutdown provokes slow requests Dan van der Ster Fri, 14 Aug 2020 05:03:48 -0700 Hi, I suppose the idea is that it's quicker to fail via the connection refused setting than by waiting for an osdmap to be propagated across the cluster. osd hard disk failure, the state changed to down. Monitor with "ceph -s". Makes sense, when I think about it, but I didn't before. This size did not change when i turned on Autoscale on SSD pool, only the smaller for HDD and test. Ask Question Asked 8 months ago. 220:6800/11080. Ask Question Asked 6 years, 5 months ago. PGs will get a degraded state because the noout option prevents the OSD to be marked out of the cluster. How can I remove the osd block from sdb. And why the osd block. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. Shut down the nodes one by one in the following order: Service nodes (for example, RADOS Gateway nodes) Ceph OSD nodes. 14639 host ceph01 0 0. ceph osd down 0 ceph osd down 1 ceph osd down 2. If an OSD is down and the degraded condition persists, Ceph may mark the down OSD as out of the cluster and remap the data from the down OSD to another OSD. Performance considerations. 12 Click on master node, from right hand side panel, Navigate to Ceph -> OSD, Click on the OSD to be removed, Click on More button from top right corner, Click on Destroy. After it's down it cannot be restarted via ceph commands. It works great so far, but over time (after a few hours / days) the osd's start to go down. As we need to scale down the cluster, we will remove ceph-node4 and all of its associated OSDs out of the cluster. [ceph-users] Re: Ceph cluster not recover after OSD down Robert Sander Wed, 05 May 2021 02:56:25 -0700 Hi, Am 05. Ceph – slow recovery speed. radosgw and all the daemons are running on the same node, and everything was working fine. Monitor with "ceph -s". 01999 host cephf23-node1 2 0. 07570 host worker2 0 ssd 0. Dec 03, 2019 · pg down 的意思是含有最新数据 pg 的对应的 osd 没起来,最简单的做法就是将该 osd 拉起来,但如果该 osd 实在拉不起来且已经把它移出集群了,则可以告诉集群那个主 pg 的 osd 已经丢失了,让其它副本的 pg 作为主 osd ,比如 osd. 2, Ceph with 3 OSD, 1 MON running on a same node. You can however also set the noout flag per OSD basis using this command:. Also keep in mind that in order to rebalance after an OSD failed your cluster can fill. Joao, I ran into this again today and found over 100,000 osdmaps on all 1,000 OSDs (~50 TiB of disk space used just by osdmaps). That depends which OSDs are down. Makes sense, when I think about it, but I didn't before. If you want to remove a healthy OSD, you should run kubectl -n rook-ceph scale deployment rook-ceph-osd- --replicas=0 and ceph osd down osd. Hello, I have a cluster with 3 PCs, each having 3 osd's. 78Mb/s is not much when you have a 500TB Cluster. [email protected]:~ # ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0. ceph health detail HEALTH_ERR 1 full osd (s); 1 backfillfull osd (s); 1 nearfull osd (s) osd. BlueStore is the engine used by the OSD to store data. If it says ‘ Error EBUSY: osd. 2018-02-12 Re: Ceph Luminous - pg is down due to src/osd/SnapMap ceph-deve Stefan Priebe - Pr 2. Adding OSDs¶. If ceph has enough time and space to recover a failed OSD then your cluster could survive two failed OSDs of an acting set. * exists but key does not match等关键字;然后在OSD主机或部署节点主机执行以下命令:ceph a. Onsite at customer they had a 36bays OSD node down in there 500TB cluster build with 4TB HDDs. 1 goes down and osd. sudo systemctl stop [email protected]{osd-num} Now the OSD is down. This size did not change when i turned on Autoscale on SSD pool, only the smaller for HDD and test. It may also happenwhen osd(s) are added to the cluster. Clyso GmbH - Ceph Foundation Member Thu, 06 May 2021 13:31:59 -0700. All OSD installed in. OSD removal can be automated with the example found in the rook-ceph-purge-osd job. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. 11 Mark OSD down. We cannot simply remove the OSD. Performance considerations. PGs will get a degraded state because the noout option prevents the OSD to be marked out of the cluster. One or more OSDs are marked down. [email protected]:~ # ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0. Chapter 14. 1 due to known data corruption during transfer due to curl errors). 2018-02-12 Re: Ceph Luminous - pg is down due to src/osd/SnapMap ceph-deve Sage Weil 3. Rich's hint to get the cluster to health OK first pointed me in the right direction, as well as the docs on full OSDmap version pruning [1] that mention constraints in OSDMonitor::get. Red Hat Ceph Storage Storage Strategies Guide. bash [2681]: Stalls (count): 0 level0_slowdown, 0 level0_slowdown_with_compaction, 0 level0_numfiles, 0 level0_numfiles_with_compaction, 0 stop for pending_compa> Aug 06 06:52:37 uk1-ceph-004 bash [2681]: ** File Read Latency Histogram By Level [default. I want to deploy a. Together, these charms can scale out the amount of storage available in a Ceph cluster. First i was started to update Ceph with status "health OK", but OSDs didn't start to update, the Operator pod was saying that it can't update OSD and will try later (it retried over and over). 2018-02-12 Re: Ceph Luminous - pg is down due to src/osd/SnapMap ceph-deve Stefan Priebe - Pr 4. Autoscale PG is ON, 5 pools, 1 big pool with all the VM's 512 PG (all ssd). 20 though - even if I restart osd. One thing that is not mentioned in the quick-install. from the toolbox. 2 hosts (include 6 osds) down in my cluster and after I delete the osd pod, it will restart and still mark as down. 12 Click on master node, from right hand side panel, Navigate to Ceph -> OSD, Click on the OSD to be removed, Click on More button from top right corner, Click on Destroy. 2018-02-05 Re: Ceph Luminous - pg is down due to. 4 is backfill full at 91 % osd. 85 which means 85% of the cluster capacity. We can mark them down and destroy in one command. 00000 > 4 0 osd. 0 is down since epoch 23, last address 192. OSD down/out. 1 --osd_max_scrubs=1 • Not all options can be set at run-time. Finally, after the status has changed from up to down, select Destroy from the More drop-down menu. Prior to Ceph Luminous you could only set the noout flag cluster-wide which means that none of your OSDs will be marked as out. The process of removing OSDs from a Ceph cluster involves removing all the entries of these OSDs from cluster maps. *' injectargs --osd-max-backfills=2 --osd-recovery-max-active=6 or. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. 1 goes down and osd. Ceph - slow recovery speed. May 05, 2016 · on the customer's ceph-osd server all OSD get down. In this case, we can start that ceph-osd and things will recover. Problem was, it was dead slow. $ ceph osd dump | grep ^osd. On reboot, the systems came up just fine, but the CEPH cluster is degraded because the osd on the second server was shown as down/out. Recommended values for mon osd down out in ceph. num_up_osds metrics in Sysdig Monitor for alerting when this happens. 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. Remove the OSD entry from your ceph. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. Ceph OSD down 問題トラブルシュート手法. 0 is down since epoch 23, last address 192. Rebooting Ceph Storage Nodes. Setting the values to high can cause osd's to restart, causing the cluster to become unstable. One or more OSDs are marked down. But there is chance that all the OSDs reporting the failure are hosted in a rack with a bad switch which has trouble connecting to another OSD. Active 6 years, 6 months ago. Each OSD manages a local device and together they provide the distributed storage. 14639 host ceph01 0 0. On the OSD nodes (sto-vm21, sto-vm22, sto-vm23), no Ceph daemon is running: $ ps -ef | egrep "ceph|osd|rados". Performance considerations. Autoscale PG is ON, 5 pools, 1 big pool with all the VM's 512 PG (all ssd). For this, log in to any of the cluster nodes and perform the following commands: # ceph osd crush remove osd. If ceph has enough time and space to recover a failed OSD then your cluster could survive two failed OSDs of an acting set. $ ceph osd dump | grep ^osd. 00000 > 2 0 osd. # qemu-img create -f qcow2 cephf23-node1disk1. After the time interval set by mod osd down out interval, ceph marks it out and starts data migration recovery. It works great so far, but over time (after a few hours / days) the osd's start to go down. Ceph is pedantic and will try to prevent split-brains in the PG level by halting IO. 1c 0 0 0 0 0 0 0 0 down 3h 0'0 311117:223 [16,18,6]p16 [16,18,6]p16 2020-01-21 07:02:54. Morning friends. But there is chance that all the OSDs reporting the failure are hosted in a rack with a bad switch which has trouble connecting to another OSD. 0 updated; Remove the OSD from the Ceph Storage Cluster: # ceph osd rm osd. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. This allows the Ceph OSD daemon to recover from unexpected outages, without losing data. We can mark them down and destroy in one command. Following is the log seen in the OSD node 2019-0. ceph osd down and rgw Initialization timeout, failed to initialize after reboot. All OSD installed in. 00000 > 3 0 osd. First, we need to remove the OSD authentication key. Next Last 1. Ceph: OSD "down" and "out" of the cluster - An obvious case. When this happens, other OSDs with copies of the failed OSD data begin backfilling to ensure that the required number of copies exists within the cluster. This is what I get from cephadm logs for the specific OSDin fact all OSDs on that host. The storage device is normally used as a whole, occupying the full device that is managed directly by BlueStore. 5, slave runs 14. 024%), 84 pgs degraded, 122 pgs undersized services: mon: 2 daemons, quorum node140,node142 (age 3d. Aug 11, 2021 · watch ceph -s Verification. By default, two Ceph OSD Daemons from different hosts must report to the Ceph Monitors that another Ceph OSD Daemon is down before the Ceph Monitors acknowledge that the reported Ceph OSD Daemon is down. We cannot simply remove the OSD. 00000 > 4 0 osd. • Options set at run-time are not automatically persisted to ceph. A Ceph OSD Daemon sends a report to a Ceph Monitor when a reportable event such as a failure, a change in placement group stats, a change in up_thru or when it boots within 5 seconds. Let’s create disk we are going to use for OSD. OSD removal can be automated with the example found in the [rook-ceph-purge-osd job]. In order to reduce the impact, you can turn it off first, and then turn it on after the replacement of the hard disk is completed. 00999 host cephf23-node3 0 0. The ceph-osd charm deploys the Ceph object storage daemon (OSD) and manages its volumes. And why the osd block. So the OSD is where your data is stored, and they also handle things like rebalancing and replication. Replace with the ID of the OSD that is marked as down, for example: # ceph auth del osd. 14639 host ceph02 1 0. Each OSD manages a local device and together they provide the distributed storage. I want to deploy a cluster. If osd's start restarting, then reduce the values. All OSD installed in. num_up_osds metrics in Sysdig Monitor for alerting when this happens. [ceph-users] Re: Ceph cluster not recover after OSD down. 4 /dev/sdd ceph-5a34e8e4-c7c7-42fd-83ee-e2409563fe54 lvm2 a-- <1,82t 0 --> Osd. 2 hosts (include 6 osds) down in my cluster and after I delete the osd pod, it will restart and still mark as down. Unfortunately, we now have 4 pgs down (all involving the dead osd) and 8. 00000 > 5 0 osd. Identify which ceph-osds are down with: [email protected] > ceph health detail HEALTH_WARN 1/3 in osds are down osd. If ceph has enough time and space to recover a failed OSD then your cluster could survive two failed OSDs of an acting set. Caveat ¶ Never take down too many OSDs at the same time, because this may result in number of copies for some data to fall below “osd pool default min size”, in which case data consistency or integrity might not be. Ceph - slow recovery speed. 024%), 84 pgs degraded, 122 pgs undersized services: mon: 2 daemons, quorum node140,node142 (age 3d. 1 --osd_max_scrubs=1 • Not all options can be set at run-time. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. 00000 > 3 0 osd. 14639 host ceph01 0 0. 29279 root default -2 0. Active 6 years, 6 months ago. log:2016-05-04 20:42:35. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. Shut down the nodes one by one in the following order: Service nodes (for example, RADOS Gateway nodes) Ceph OSD nodes. So the OSD is where your data is stored, and they also handle things like rebalancing and replication. 3 /dev/sdc ceph-c51f4b74-daba-4417-abd4-a977e94a8126 lvm2 a-- <7,28t 0 --> Osd. If you want to remove a healthy OSD, you should run kubectl -n rook-ceph scale deployment rook-ceph-osd- --replicas=0 and ceph osd down osd. Unfortunately, we now have 4 pgs down (all involving the dead osd) and 8. After the time interval set by mod osd down out interval, ceph marks it out and starts data migration recovery. Ceph OSD Management. Also, we remove the OSD from the OSD map, and from the ceph. One or more OSDs are marked down. But there is chance that all the OSDs reporting the failure are hosted in a rack with a bad switch which has trouble connecting to another OSD. Next is the Ceph OSD's. Recommended values for mon osd down out in ceph. This is what I get from cephadm logs for the specific OSDin fact all OSDs on that host. ceph osd out osd. Once the OSD status has changed from in to out, click the STOP button. Rebooting Ceph Storage Nodes. Once done, perform the maintenance as required. 11 is already out" — it's ok. See Down OSDs for details. This suggestion is invalid because no changes were made to the code. The 2950s have a 2tb secondary drive (sdb) for CEPH. ’ that means OSD is not dead yet. 1c 0 0 0 0 0 0 0 0 down 3h 0'0 311117:223 [16,18,6]p16 [16,18,6]p16 2020-01-21 07:02:54. If you want to remove a healthy OSD, you should run kubectl -n rook-ceph scale deployment rook-ceph-osd- --replicas=0 and ceph osd down osd. 2018-02-12 Re: Ceph Luminous - pg is down due to src/osd/SnapMap ceph-deve Stefan Priebe - Pr 4. When an OSD goes down, its contents may fall behind the current state of other replicas in the placement groups. (1)查看集群状态,发现2个osd 状态为down [[email protected] /]# ceph -s cluster: id: 58a12719-a5ed-4f95-b312-6efd6e34e558 health: HEALTH_ERR noout flag(s) set 2 osds down 1 scrub errors Possible data damage: 1 pg inconsistent Degraded data redundancy: 1633/10191 objects degraded (16. Rook will automate creation and management of OSDs to hide the complexity based on the desired state in the CephCluster CR as muc…. When a drive fails, Ceph reports the OSD as down: HEALTH_WARN 1/3 in osds are down osd. This is a way to find the physical location of a down osd. When you want to expand a cluster, you may add an OSD at runtime. If clients are impacted by the recovery, reduce the values. Ask Question Asked 6 years, 6 months ago. I am trying to install and deploy a ceph cluster. 1 (via proxmox 6, 7 nodes). I'm trying to upgrade rook and ceph to latest versions from 1. num_osds, ceph. And why the osd block. 85 which means 85% of the cluster capacity. Clyso GmbH - Ceph Foundation Member Thu, 06 May 2021 13:31:59 -0700. 21 um 11:44 schrieb Andres Rojas Guerrero: > I have in the cluster 768 OSD, it is enough that 32 (~ 4%) of them (in > the same node) fall and the information becomes inaccessible. 10 # ceph osd out osd. 3 is full at 97 % osd. When the data migration is done make sure the cluster is in healthy state, and the amount of OSD’s in the cluster match the amount previously in the cluster. 00000 > 5 0 osd. 2 is near full at 87 % The best way to deal with a full cluster is to add capacity via new OSDs, enabling the cluster to redistribute data to newly available storage. Ask Question Asked 8 months ago. 2018-02-05 Re: Ceph Luminous - pg is down due to. If the OSD is down, Ceph marks it as out automatically after 600 seconds when it does not receive any heartbeat packet from the OSD. See full list on blog. Next Last 1. 01999 host cephf23-node1 2 0. On the OSD nodes (sto-vm21, sto-vm22, sto-vm23), no Ceph daemon is running: $ ps -ef | egrep "ceph|osd|rados". This size did not change when i turned on Autoscale on SSD pool, only the smaller for HDD and test. 11 Mark OSD down. (Some only take effect after a reboot). Ask Question Asked 8 months ago. At the next moment, osd. PV VG Fmt Attr PSize PFree /dev/sdb ceph-a228cec5-405a-458d-9a41-201db41ea392 lvm2 a-- <7,28t 0 --> Osd. Ask Question Asked 6 years, 6 months ago. num_in_osds and ceph. 8 - the number of slow ops goes down - but then starts incrementing again shortly afterwards: # ceph health detail HEALTH_WARN 1 pools have many more objects per pg than average; Reduced data availability: 1 pg inactive; 28 slow ops, oldest one. When something goes wrong with a ceph-osd node, one should follow the right procedure to take down the node for maintenance. All OSD installed in. # ceph health detail HEALTH_WARN 1/3 in osds are down osd. 78Mb/s is not much when you have a 500TB Cluster. ceph tell 'osd. If an OSD is down and the degraded condition persists, Ceph may mark the down OSD as out of the cluster and remap the data from the down OSD to another OSD. As soon as you mark OSDs out of the. Replace with the ID of the OSD that is marked as down, for example: # ceph auth del osd. The default value in Jewel is 300 seconds.