How to check ceph version Which Kernel Version? Because the kernel client is distributed as part of the Linux kernel (and not as part of the packaged Ceph releases), you will need to consider which kernel version to use on your client nodes. ceph. It’s recommended to use the enterprise repository for production machines. To build binaries that are suitable for installation we recommend that you build . x86_64 # /bin/ceph --version ceph version 12. There are certain PG-peering-related circumstances in which it is expected and normal that the cluster will NOT show HEALTH OK: While Ceph Dashboard might work in older browsers, we cannot guarantee compatibility and recommend keeping your browser up to date. I tried everything and the result looks like this. Check the OS recommendations and the release notes for each Ceph version in order to make sure that you have addressed any issues related to your kernel. DAEMON_OLD_VERSION One or more Ceph daemons are running an old Ceph release. Previous Next The Ceph Documentation is a community resource funded and hosted by the non-profit Ceph Foundation. ceph. First, select the version OCS/ODF. It provides a diverse set of commands that allows deployment of monitors, OSDs, placement groups, MDS and overall maintenance, administration of the cluster. Check the OS recommendations and the release notes for each Ceph version to ensure you have addressed any issues related to your kernel. in or debian/rules to see which configuration options are specified for production builds. target Check the currently running binary version of all running OSD instances in your cluster: ceph osd versions After restarting all OSD instances on all nodes, this should output one line with a Ceph Luminous version string followed by the total number of OSDs in your cluster. On any ceph-mon unit run a status check: juju ssh ceph-mon/1 sudo ceph status Prevent data rebalancing from occurring when OSDs start disappearing from the network. 2+) release directly, but we primarily test and recommend upgrading to Ceph May 19, 2024 · I lost one of my cluster and ceph nodes. The rook-ceph-cluster helm chart upgrade performs a Ceph upgrade if the Ceph image is updated. So i have in some of my OSD version 14. Please check Ceph cluster health. If not, see the Ceph Quincy to Reef upgrade guide. 8-128. When a health check fails, this failure is reflected in the output of ceph status and ceph health. Ceph command list The following table shows some of the common Ceph commands used in a cluster: Command Function #ceph -s Displays the Ceph cluster status. Using the --yes-i-really-mean-it flag to force the host to enter maintenance mode can potentially cause loss of data availability, the mon quorum to break down due to too few running monitors, mgr module commands (such as ceph orch commands) to be become unresponsive, and a number of other possible issues. 18 cluster, which running on 4 bare metal machines with CentOS 8. This check is bypassed if an upgrade is in process. This means that the client needs keys in order to communicate with Ceph daemons. Type: Integer. 13 version and plan to upgrade to 16. Older kernels may not receive new backports that Ceph depends upon for better performance. in: Replace %usrmerged macro with regular version check (pr#49830, Tim Serong) ceph_fuse: retry the test_dentry_handling if fails ( pr#49944 , Xiubo Li) cephadm: Adding poststop actions and setting TimeoutStartSec to 200s ( pr#50514 , Redouane Kachach) If you run the commands ceph health, ceph-s, or ceph-w, you might notice that the cluster does not always show HEALTH OK. 1 and in some 14. Basically the same as ceph/ceph, but with different tags. 4-pve3 or higher). 9 nearfull_ratio 0. com. For OCP, use ODF; From here, click on the Ve To install Ceph and other enabling software, you need to retrieve packages from the Ceph repository. el7. 2). For this reason, the Ceph Monitors will warn when placement groups get “stuck” in a non-optimal state. Previous Next Note. 4 is a patch release limited in scope and focusing on feature additions and bug fixes to the Ceph operator. 1 that looks like restart or reload. We recommend deploying five monitors if there are five or more nodes in your cluster. #ceph -w Displays the … - Selection from Mastering Proxmox - Third Edition [Book] 3) ctx->new_obs. Normally, these states reflect the expected progression through the failure recovery process. Apr 7, 2022 · Hi All, I have a cluster of 4 nodes with Proxmox 7. Sep 24, 2014 loic. This means that a new snapshot can be created and retained during the next schedule run. Older kernels are known to include buggy Ceph clients and may not support features that more recent Ceph clusters support. Running the command ceph --version shows one version, but running rpm -q ceph shows a different version # ceph --version ceph version 12. New to Red Hat? Using a Red Hat product through a public cloud? TrustArc Cookie Consent Manager helps ensure online privacy compliance. 2 (enterprise) in two 3-node clusters with ceph (14. The new OSD will have the specified uuid, and the command expects a JSON file containing the base64 cephx key for auth entity client. 0 instructed to deep-scrub ceph osd find <id> Display location of a given OSD (host name, port, and CRUSH details) # ceph osd find 0 { "osd": 0, Jul 28, 2024 · -n rook-ceph NAME READY STATUS RESTARTS AGE csi-cephfsplugin-8vrgj 3/3 Running 0 5m39s csi-cephfsplugin-9csbp 3/3 Running 0 5m39s csi-cephfsplugin-lh42b 3/3 Running 0 5m39s csi-cephfsplugin-provisioner-b54db7d9b-kh89q 6/6 Running 0 5m39s csi-cephfsplugin-provisioner-b54db7d9b-l92gm 6/6 Running 0 5m39s csi-cephfsplugin-xc8tk 3/3 Running 0 5m39s csi-rbdplugin-28th4 3/3 Running 0 5m41s csi Apr 16, 2023 · sudo ceph nfs cluster create [nfs-cluster-name] We can check the status of the creation with these commands. 4 on an Kubernetes v1. This check determines the active release for each daemon, and reports any anomalies as a healthcheck. The question are these: -The 7. 17 or Check that you are using the example yaml files that correspond to your release Ceph has a dashboard in which you can By default, Ceph uses third-party tools that might be buggy or come into conflict with certain distributions or kernel versions (for example, Google’s gperftools and TCMalloc). My ceph version is 15. Prometheus’ security model presumes that untrusted users have access to the Prometheus HTTP endpoint and logs. 8 NFS docs. txt and there is no output. Wait for the cluster to deactivate any non-zero ranks by periodically checking the status of Ceph. Now my ceph cluster complains about this version difference. Kubernetes v1. The ceph-osd daemon may have been stopped, or peer OSDs may be unable to reach the OSD over the network. I run it as sh . The following table summarises Ceph versions, the UCA (or Distro) and LTS releases: Due to a number of Ceph issues and changes, Rook officially only supports Ceph v16. Aug 16, 2020 · Bug Report I'm installing Rook v1. My Ceph Cluster is made of 1 pool, consisting of 8xSSD to each nodes. osd. Kernel Issues with SyncFS¶ Try running one OSD per host to see if performance improves. This file should usually be copied to /etc/ceph/ceph. 5-224-g4051bc2 Nov 16, 2019 · I added new machine to my proxmox cluster and then to my ceph pool but during the instalation version of the ceph changed to never version. There are certain PG-peering-related circumstances in which it is expected and normal that the cluster will NOT show HEALTH OK: ceph status ceph fs get <fs_name> | grep max_mds ceph fs set <fs_name> max_mds 1 With a rank higher than 1 you will see more than one MDS active for that Ceph FS. Setting up NFS-Ganesha with CephFS, involves setting up NFS-Ganesha’s and Ceph’s configuration file and CephX access credentials for the Ceph clients created by NFS-Ganesha to access CephFS. This allows most upgrades to proceed without Storing/Retrieving Object Data¶. NAME READY STATUS RESTARTS AGE csi-addons-controller-manager-7957956679-pvmn7 2/2 Running 0 7m52s noobaa-operator-b7ccf5647-5gt42 1/1 Running 0 8m24s ocs-metrics-exporter-7cb579864-wf5ds 1/1 Running 0 7m52s ocs-operator-6949db5bdd-kwcgh 1/1 Running 0 8m13s odf-console-8466964cbb-wkd42 1/1 Running 0 8m29s odf-operator-controller-manager-56c7c66c64-4xrc8 2/2 Running 0 8m29s rook-ceph-operator By default, Ceph uses third-party tools that might be buggy or come into conflict with certain distributions or kernel versions (for example, Google’s gperftools and TCMalloc). To start using Ceph, you can create a new storage pool: ceph osd pool create mypool 100 A debug build of Ceph may take around 40 gigabytes. 4 There is an icon next to the 14. See Adding/Removing a Monitor for details. 4, which is the same as in the rook image. Severity: Critical Resolution: Contact Red Hat support. Common causes include a stopped or crashed daemon, a down host, or a network outage. a), as stored in the monitors’ configuration database. I have enterprise subscriptions for all three nodes. oi. Check cluster status and adjust settings Minimum Version. The rook-ceph chart should be upgraded before rook-ceph-cluster, so the latest operator has the opportunity to update custom resources as necessary. This allows most upgrades to proceed without Rook v1. Since the Rook-Ceph toolbox is not shipped with OCS, we need to deploy it manually. 0 osd. We plan to upgrade the clusters to Proxmox 7. ceph config get <who> will dump the configuration for a specific daemon or client (e. ceph status ceph fs get <fs_name> | grep max_mds ceph fs set <fs_name> max_mds 1; Wait for the cluster to deactivate any extra active MDS (ranks) by periodically checking the status of Ceph. Ensure that every single disk has been added to the cluster, for example if we had 15 total OSD disks before expansion, and the new node consisted of an Ceph storage cluster clients connect to a Ceph Monitor and receive the latest version of the storage cluster map before they can read and write data to the Ceph pools within the storage cluster. So the monitor cluster must have agreement on the state of the cluster before Ceph clients can read and write data. 95 backfillfull_ratio 0. 7 sudo ceph osd set noout # turn off some osd operations sudo ceph osd set noscrub ceph is a control utility which is used for manual deployment and maintenance of a Ceph cluster. Segment Fault: If there is a segment fault, increase log levels and start the problematic daemon(s) again. Warning. 16. It is handy to find out how mixed the cluster is. The following screen shot mon: Fix condition to check for ceph version mismatch (pr#49989, Prashant D) Monitor: forward report command to leader ( pr#47928 , Dan van der Ster) monitoring/ceph-mixin: add RGW host to label info ( pr#48034 , Tatjana Dehler) This command generates a minimal config file that tells the client how to reach the Ceph Monitors. In order to track the Ceph versions of clients connected to a cluster this would have to be done manually on each client node or Hyper-converged Ceph: upgrade any Ceph Octopus or Ceph Pacific cluster to Ceph 17. Feb 10, 2021 · Hi, we are running Proxmox 6. Enabling . See User Management - Backward Compatibility for details. Creating Users Start by creating a Ceph user (on the primary/local cluster) for the cephfs-mirror daemon. , only one active MDS for each file system. If you have installed ceph-mgr-dashboard from distribution packages, the package management system should take care of installing all required dependencies. Procedure: The purpose of the UCA is to make available recent versions of OpenStack (which consume Ceph) to Ubuntu LTS releases. # make sure Ceph is in HEALTH_OK state sudo ceph versions # check the current version sudo ceph orch upgrade ls # query available version # check upgrade version check sudo ceph orch upgrade check --ceph_version 17. <id>, as well as optional base64 cepx key for dm-crypt lockbox access and a dm-crypt key. nopgchange Description: Sets or unsets the NOPGCHANGE flag on a given pool. For example, you can upgrade from v15. conf on each client host. . Nov 4, 2022 · I see the upgrade icons on the CEPH screen that say to upgrade to the latest version, but I cannot find out how to accomplish that. The automated upgrade process follows Ceph best practices. 2. To check Ceph cluster health status from the admin node; ceph -s. We would like to show you a description here but the site won’t allow us. I rebuild rook image to make it consistent with the ceph image version and solved the problem. : ceph status ceph fs get <fs_name> | grep max_mds ceph fs set <fs_name> max_mds 1 Aug 4, 2023 · MGR . admin # KEYRING Kernel Version¶ Check the kernel version you are running. [nfs-cluster-name] sudo ceph orch ps --service_name=nfs. To store object data in the Ceph Storage Cluster, a Ceph client must: Set an object name. Red Hat Ceph Storage 1. ceph config set <who> <option> <value> will set a configuration option in the monitors’ configuration database. 2+) to Squid (19. , mds. 242654+0000 modified 2024-08-01T07:21:52. After running the ceph orch upgrade start command to upgrade the IBM Storage Ceph cluster, you can check the status, pause, resume, or stop the upgrade process. First I want to use an internal ceph cluster which created by Rook, but I failed, so I create an ceph cluster by my Understanding how to configure a Ceph Monitor is an important part of building a reliable Ceph Storage Cluster. Upgrade procedure will be to re install node by node with Proxmox 7, join cluster, install ceph, import OSDs and let Ceph resync. 3 PVE version is This command generates a minimal config file that tells the client how to reach the Ceph Monitors. To check if Ceph is installed correctly: ceph --version This should return the version of Ceph that you installed. The primary (local) and secondary (remote) Ceph clusters version should be Pacific or later. Run ceph log last [n] to see the most recent n lines from the cluster log. 0 (the first Octopus release) to the next point release, v15. Mar 10, 2024 · Check Ceph Cluster Health. It simplifies key distribution, service placement, and disk administration. # ceph osd deep-scrub osd. If you would like to support this and our other efforts, please consider joining now . Jan 22, 2021 · But the version of rook-ceph does look inconsistent with expectations. I rebuild the node and added to ceph/cluster. Old kernels might not have a recent enough version of glibc to support syncfs(2). # ceph osd dump | grep -B20 stretch_mode_enabled epoch 15729 fsid 7b3153f8-de15-11e9-83de-e4434b135035 created 2019-09-23T15:57:23. ceph config dump will dump the entire configuration database for the cluster. This guide will walk you through the manual steps to upgrade the software in a Rook cluster from one version to the next. Monitor On-wire Protocol¶. Red Hat Ceph Storage is a scalable, open, software-defined storage platform that combines the most stable version of the Ceph storage system with a Ceph management platform, deployment utilities, and support services. A typical Ceph cluster has three or five monitor daemons that are spread across different hosts. 202013+0000 flags sortbitwise,recovery_deletes,purged_snapdirs,pglog_hardlimit crush_version 263 full_ratio 0. On any ceph-mon unit set the ‘noout’ option for the cluster: juju run-action --wait ceph-mon/1 set-noout Oct 14, 2024 · However, the TLDR; of the solution is it is a lightweight version of Ceph that still has most of the benefits of full-blow Ceph, but is easier to install and manage. Jan 24, 2024 · sudo ceph health. Example Upgrade to Ceph Reef¶ 1. I have run the upgrade refresh multiple times, verified that the repository is correct, and done everything short of rebuilding the CEPH install. Sep 6, 2024 · These instructions are meant for developers who are compiling the code for development and testing. After first checking to see if the OSDs are running, you should also check PG states. The cluster log receives messages that indicate when a check has failed and when the cluster has Aug 7, 2023 · The Ceph Documentation is a community resource funded and hosted by the non-profit Ceph Foundation. el7 What are the Ceph enterprise versions? A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. After sometime, you should see such an output; DAEMON_OLD_VERSION One or more Ceph daemons are running an old Ceph release. 94. Jan 17, 2020 · > Note: The NooBaa pod used the ocs-storagecluster-ceph-rbd storage class for creating a PVC for mounting to it’s db container. nosizechange Description: Sets or unsets the NOSIZECHANGE flag on a given pool. spec. Update the Ceph daemons¶ Sep 24, 2014 · List the versions of OSDs in a Ceph cluster. Each Ceph Node in your cluster must have internet access. Subcommand new can be used to create a new OSD or to recreate a previously destroyed OSD with a specific id. One or more OSDs are marked down. : ceph status The number of active MDS should go down to the number of file systems DAEMON_OLD_VERSION One or more Ceph daemons are running an old Ceph release. 2 Squid packages before they are moved to the enterprise repository and after they where on the test repository. Upgrading Ceph Cephadm can safely upgrade Ceph from one point release to the next. This weekend I would like to upgrade Proxmox to 7. 4-42. sudo ceph orch ls --service_name=nfs. Reduce the number of ranks to 1 (if you plan to restore it later, first take notes of the original number of MDS daemons). 3 and Ceph to Quincy(the latest version). Is it possible to check the ceph version running on the OSD nodes, from the monitor or other OSD nodes, with a single command? Environment. By default, Ceph uses third-party tools that might be buggy or come into conflict with certain distributions or kernel versions (for example, Google’s gperftools and TCMalloc). The Ceph Client retrieves the latest cluster map and the CRUSH algorithm calculates how to map the object to a placement group, and then calculates how to assign the placement group to a Ceph OSD Daemon dynamically. Keyring Setup Most Ceph clusters run with authentication enabled. el7cp (030358773c5213a14c1444a5147258672b2dc15f) luminous (stable) # rpm -qf /bin/ceph ceph-common-12. FSAL_CEPH is the plugin FSAL for CephFS. The plugin is in the directory but I see no output in Check_MK. 14. Issues fixed in the development branch (master) are scheduled to be backported. 2. 7 or higher for CephNFS. For each NFS-Ganesha export, FSAL_CEPH uses a libcephfs client to mount the CephFS path that NFS-Ganesha exports. Feb 21, 2020 · Check the Ceph-Deploy version: $ ceph-deploy --version Create a Ceph Deploy User. mgr/snap_schedule: The snap-schedule manager module now retains one snapshot less than the number mentioned against the config option mds_max_snaps_per_dir. Instead, Ceph clients make requests directly to Ceph OSD daemons. Note that all of the -devel tags (and the latest-master tag) are based on unreleased and generally untested packages from https://shaman. g. 4 automatically while my old nodes were in 18. bulk May 29, 2023 · Following the problem here: Proxmox mit Ceph I am in the same position as original poster. Valid Range: 1 sets flag, 0 unsets flag. Description: Cluster Object Store is in unhealthy state for more than 15s. Version: Version FIXME. 4. To determine the version of the Ceph FS client in your environment, start by going here: Red Hat OpenShift Data Foundation Supportability and Interoperability Checker. Oct 19, 2022 · Ensure that the nodes are all running the same Ceph Version, and if need be do any minor updates to the existing Ceph Packages on the cluster so they will be in line with the new nodes added. 2 (or higher) version and Ceph is on version Reef (18. To verify the health status of the ceph cluster, simply execute the command ceph s on the admin node or even on each OSD node (if you have installed cephadm/ceph commands there). The selection of a Ceph version with Charmed Ceph therefore often makes reference to the Charmed OpenStack project. 1. This allows most upgrades to proceed without Ceph cluster status (see upcoming Ceph tools section) Ceph Tools¶ After you verify the basic health of the running pods, next you will want to run Ceph tools for status of the storage components. Its focus is more on the experience of Ceph administrators and storage software developers. When an issue found in the stable release is reported , it is triaged by Ceph developers. A health check is raised if multiple versions are detected. Use ceph -v to see that it is 15. May 26, 2016 · Occasionally it may be useful to check the version of the OSD on the entire cluster : { "version": "ceph version 0. Ceph OSDs perform data replication on behalf of Ceph clients, which means replication and other factors impose additional loads on the networks of Ceph storage clusters. To check if this is the case on your cluster, check the output of ceph status and verify that there is only one active MDS. Integration and upgrade tests are run on a regular basis and their results analyzed by Ceph developers. All Ceph Storage Clusters have at least one monitor. Monitoring Health Checks Ceph continuously runs various health checks. The ceph-deploy utility must login to a Ceph node as a user that has passwordless sudo privileges, because it needs to install software and configuration files without prompting for passwords. Ceph containers other than the official images from the registry above will not be supported. 3. For example: The upgrade order starts with managers, monitors, then other daemons. List the versions that each OSD in a Ceph cluster is running. rpm packages, or refer to ceph. CEPHADM_CHECK_KERNEL_VERSION Oct 3, 2021 · The Ceph storage cluster does not perform request routing or dispatching on behalf of the Ceph client. note: This image will soon become an alias to ceph/ceph. While Ceph Dashboard might work in older browsers, we cannot guarantee compatibility and recommend keeping your browser up to date. deb or . manifest: Update default Ceph version to v19. Follow the guide Ceph Octopus to Pacific and Ceph Pacific to Quincy , respectively. This condition must exist for a period of time greater than mon_warn_older_version_delay (set to one week by default) in order for the health check to be raised. I suspect that I have not followed this instruction as I really cannot figure out what it is asking me to do: # Check Ceph storage # Config file must contain: # USER=client. Under normal operations, the Ceph cluster runs daemons that are of the same Ceph release (for example, Reef). Ceph major version tags (e. Previous Next While Ceph Dashboard might work in older browsers, we cannot guarantee compatibility and recommend keeping your browser up to date. Ensure that the cluster is in a healthy state. Filesystem Issues¶ You can assign an override or reweight weight value to a specific OSD if the normal CRUSH distribution seems to be suboptimal. Using the Rook-Ceph toolbox to check on the Ceph backing storage. The health of the cluster changes to HEALTH_WARNING during an upgrade. Aug 7, 2023 · The Ceph Documentation is a community resource funded and hosted by the non-profit Ceph Foundation. 0. OSD_DOWN. [nfs-cluster-name] sudo ceph nfs cluster info [nfs-cluster-name] Here we first created a nfs cluster named singletest. The weight of an OSD helps determine the extent of its I/O requests and data storage: two OSDs with the same weight will receive approximately the same number of I/O requests and store approximately the same amount of data. Customers may have over 1000+ clients connected to a Ceph cluster and these clients may not all be running the same version of Ceph. 1-9 and Ceph Pacific v. However, a placement group that stays in one of these states for a long time might be an indication of a larger problem. But when I install ceph on this new node, it selected 18. user_version = ctx->user_at_version (to change the object’s user_version) This set of update semantics mean that for traditional pools the user_version will be equal to the past reassert_version, while for caching pools the object and PG user-version will be able to cross pools without making a total mess of things. The monitor complement usually remains fairly consistent, but you can add, remove or replace a monitor in a cluster. We recommend upgrading all monitors to Bobtail. If you are using an earlier version, upgrade your Ceph version following the advice given in Rook's v1. 7. , v19) are useful for development and test clusters so that the latest version of Ceph is always available. 85 require_min_compat IMPORTANT: When an update is requested, the operator will check Ceph’s status, The most explicit form of tags are full-ceph-version-and-build tags Upgrading Ceph Cephadm can safely upgrade Ceph from one point release to the next. The attached cheat sheet lists the most common administrative commands for Red Hat Ceph Storage. : ceph status The number of active MDS should go down to the number of file systems you have, i. 8. We have a Ceph cluster with 16. Specifically, we check for: ceph osd deep-scrub <id> Instruct Ceph to perform a deep scrubbing process (consistency check) on an OSD. user_at_version is modified only in PrimaryLogPG::prepare_transaction when the op was a “user modify” (a non-watch write), and the durable user_version is updated according to the following rules: 1) set user_at Upgrades. There are two ways to run the Ceph tools, either in the Rook toolbox or inside other Rook pods that are already running. The rook-ceph helm chart upgrade performs the Rook upgrade. There are three ways to get packages: Cephadm: Cephadm can configure your Ceph repositories for you based on a release name or a specific Ceph version. this is the only problem I have now and this is why I want to upgrade ceph only. 2 Quincy before you start the Proxmox VE upgrade to 8. The user_version is modified by manipulating the new OpContext::user_at_version and is also persisted via the pg log transactions. Untrusted users have access to all the (meta)data Prometheus collects that is contained in the database, plus a variety of operational and debugging information. Note, while it is possible to upgrade from the older Ceph Quincy (17. Rook is a distributed software system and therefore there are multiple components to individually upgrade in the sequence defined in this guide. /mk_ceph. Enabling¶. This user requires write capability on the metadata pool to create RADOS objects (index objects) for watch/notify operation and read capability on General purpose Ceph container with all necessary daemons and dependencies installed. CEPHADM_CHECK_KERNEL_VERSION Oct 31, 2023 · Now, let’s find out what versions of Ceph can be available for upgrade/downgrade and check against a target version. Lowest supported ceph version This Ceph repository contains the Ceph 19. Specify a pool. Background To install Ceph and other enabling software, you need to retrieve packages from the Ceph repository. systemctl restart ceph-osd. May 28, 2024 · After installing Ceph, you can verify its installation and start using it. rook-ceph‘s version is affected by rook image. If you run the commands ceph health, ceph-s, or ceph-w, you might notice that the cluster does not always show HEALTH OK. e. Ceph deploys monitor daemons automatically as the cluster grows and Ceph scales back monitor daemons automatically as the cluster shrinks. 1 (#15392, @subhamkrai) osd: Avoid lvm device scan deadlock in activate (#15377, @sfackler) nfs: Workaround nfs-ganesha config parser for single quotes (#15393, @BlaineEXE) We assume that all nodes are on the latest Proxmox VE 8. If you want to build Ceph in a virtual machine (VM) please make sure total disk space on the VM is at least 60 gigabytes. A mixture of Bobtail and Argonaut monitors will not be able to use the new on-wire protocol, as the protocol requires all monitors to be Bobtail or greater. Although it is best practice to have all nodes connected to a Ceph cluster running the same Ceph version this is not always possible. qtrmzkz cgxui wid feiep nwikc mqvp ndqit xudht nfj osvymz pvvbm kxa rliy ozmyxm jfa