This does. 12 Zhenshi Zhou <[email protected] At the next layer, Rook was designed from the ground up to automate recovery of Ceph components that traditionally required admin intervention. How to solve/suppress this warning message: Use injectargs to modify the “mon_pg_warn_max_per_osd to 0”, temporarily,the till the ceph mon server restart. If your Ceph cluster encounters a slow/blocked operation it will log it and set the cluster health into Warning Mode. Aug 03 06:15:35 proxmox systemd[1]: Stopped Ceph cluster monitor daemon. Following is the log seen in the OSD node 2019-0 Jun 03, 2016 · Introduction. The monitor map specifies the only fixed addresses in the Ceph distributed system. Please take a look at config get, config show, mon stat and quorum_status , as those can be enlightening when troubleshooting a monitor. ceph -w: prints the status, followed by a tail of the log as events happen (similar to running tail -f /var/log/ceph/ceph. Disable and enable the tools repositories, and then upgrade and restart each standby MDS: [[email protected] ~]# subscription-manager repos --disable=rhel-7-server-rhceph-3 Ceph Service Monitoring. Installation of the Red Hat Ceph Storage software. Ceph process management. We checked to make sure time is not out of sync. target' salt -C <HOST_NAME> cmd. service holdoff time over, scheduling restart. Add flag to delete a pool and its cache tier. Every PG maintains a state machine. Today I saw that I only have 2 active monitors. Jul 03, 2019 · Now, restart Ceph monitor with the non-leader (or lesser number first), wait until it is back in the quorum. Dec 02, 2020 · In these cases, disabling the monitor systemd unit with systemctl disable [email protected] and restarting ceph on the affected node with systemctl restart ceph. yaml in the conf. conf configuration file and the ceph. " because if the cluster is down, then there is no way to retreive the map from an existing monitor, and the script stops because of -e option, leaving the configuration in a locked state. For example after you start the Ceph Monitors, they are probing until they find enough Ceph Monitors specified in the Ceph Monitor map (monmap) to form a quorum. Similar can be done for Manager services, and for OSDs too. cc at master · ceph/ceph Jul 03, 2019 · Now, restart Ceph monitor with the non-leader (or lesser number first), wait until it is back in the quorum. sh , which installs ceph dependencies. take one node, shut it down (after setting "no out") and install the new OS. Migrate OSD pods one by one. service: Start request repeated too quickly. a, and launch the Rook cluster with one monitor pod. Or troubleshoot an issue. db increase more (and is still increasing) but it should decrease. [ceph-users] Re: monitor A Ceph Storage Cluster consists of several systems, known as nodes, each running the Ceph OSD (Object Storage Device) daemon. At this time, 2 monitor daemons and 1 monitor pod are running. conf , add the new logging level, and then restart the component, or, if you don’t wish to restart the Ceph daemons, you can inject the new configuration parameter into the live running daemon. To stop a ceph-rgw daemon that runs on the ceph-rgw01 host: # systemctl stop [email protected] Oct 30, 2013 · In order to restore the Ceph Monitor quorum, remove unhealthy Ceph Monitors form the monmap by following these steps: Stop all Ceph Monitors. Below is an example of the rook-ceph-agent pods failing to get to the Running status because they are in a CrashLoopBackOff May 01, 2021 · My last blogpost covered how to monitor S3 buckets on Amazon Web Services (AWS) from Python using the boto3 library. Jun 14, 2018 sage. With the above set of steps we complete the creation of containers ready for us to install CEPH. Both for C and for Python. After all cluster nodes are upgraded you have to restart the monitor on each node were a monitor is configured. Today I will be sharing some of the things I learned while working on a very similar topic: monitoring buckets on a Ceph storage cluster. The Health Status table displays errors and warnings of your Ceph cluster. It has 10g RJ45 ports. paxos需要根据monitor状态来做转换,大致如下 Feb 19 11:31:47 thor systemd[1]: ceph-mon at 3. RGW: the pods are stateless and can be restarted as needed. One or more instances of ceph-mon form a Paxos part-time parliament cluster that provides extremely reliable and durable storage of cluster membership, configuration, and state. 04. d/ folder at the root of your Agent’s configuration directory . Log In. 101:6789 let’s restart the Rook operator pod Extremely useful to immediately pinpoint e. One of the key new features in Ceph Mimic is the ability to manage the cluster configuration--what traditionally resides in ceph. , all ceph-mon daemons, all ceph-osd daemons, etc. Each time you want to start, restart, and stop the Ceph daemons, you must specify the daemon type or the daemon instance. "ceph -s" hangs indefinitely when a machine running a monitor has failed storage. The default port is 7000, so now go to the IP-Address of the active ceph-mgr and open the see the dashboard. Configuration Edit the file ceph. Restart the Ceph Monitor services on the cmn nodes one by one. The problem we run into is sometime during the night every night the monitor stops running. Using help as the command to the ceph tool will show you the supported commands available through the admin socket. Then allow the following list of default ports for talking to clients and monitors and for sending data to other OSDs. `hostname` stop. When creating a map with –create, a new monitor map with a new, random UUID will be created. Feb 19 11:31:47 thor systemd[1]: ceph-mon at 3. The dashboard shows the other monitor containers/services as stopped. Ceph Object Gateways. To use it on redhat based systems you need to modifiy inst-ceph-dep. Electing A Ceph Monitor is in the electing state if it is in the process of electing the leader. You can find the active ceph-mgr in the ceph status: Apr 30, 2021 · [ceph-users] one of 3 monitors keeps going down Robert W. 2:再次检查,发现问题已经解决 前言 实验环境部署ceph集群(结合openstack多节点),重启之后ceph集群的osd服务出现问题,解决如下 ceph+openstack多 The rook-ceph-agent pods are responsible for mapping and mounting the volume from the cluster onto the node that your pod will be running on. The steps in pre-flight – Setup the ‘cephadmin’ node with the ceph-deploy package. Feb 27, 2017 · Pass the monitor address to the container so the CLI can use it with -m option when creating the daemon key; Populate the daemon store; For the OSD, we might have to extend ceph-disk to support a monitor address so when it calls the Ceph CLI to create OSD it points to the monitors only and doesn’t look for any ceph. Update the node and restart the ceph-mds daemon: [[email protected] ~]# yum update -y [[email protected] ~]# systemctl restart ceph-mds. service: Mar 17, 2021 · On the CEPH Monitor nodes you have to allow the following ports in the firewall. Restart OSDs. On each Ceph Monitor node, restart the Ceph Monitor daemon: # systemctl restart ceph-mon. "KeyError: 'rotational'" when preparing OSD on top of Persistence Volume Claims. #firewall-cmd --zone=public --add-port=6789/tcp --permanent. Complete the pre-flight steps on the CEPH quick install from here. Restart daemons. keyring to /etc/ceph directory and start docker container host’s network stack. ceph-mon is the cluster monitor daemon for the Ceph distributed file system. {osd-num} with ceph-deploy. service" or "ceph-disk. For those who are not familiar with Ceph, it is a massive object store on a distributed computing system, and provides 3-in-1 interfaces for Mar 28, 2017 · If the above is more than the default (i. It should be followed by one or more monitor addresses. If mon compact on start is set true. If not – add this variable into the general [OSD] section Nov 19, 2018 · This article details the process of troubleshooting a monitor service experiencing slow-block ops. The Ceph storage cluster must also run the Ceph Monitor daemon on one or more nodes and may also run an optional Ceph Object Gateway on one or more nodes. service Verify Monitor instance versions. The objectstore tool needs to be able to access every OSD in the cluster to rebuild the monitor database; in this example, we will use a script, which will connect via ssh to access the OSD data. Ceph was designed from the ground up to deal with the failures of a distributed system. Noticed that size of store. Install Ceph. 1 Configuring sections and masks # Edit source Configuration options stored by the MON can live in a global section, daemon type section, or a specific daemon section. Now restart all ceph-mgr daemons on your hosts: systemctl restart [email protected] Accessing the dashboard. * injectargs "--mon_pg_warn_max_per_osd 0" The rook-ceph-agent pods are responsible for mapping and mounting the volume from the cluster onto the node that your pod will be running on. Best regards, sudo systemctl stop ceph-osd @ 1 sudo systemctl stop ceph-mon @ceph-server sudo systemctl stop ceph-mds @ceph-server Running Ceph with sysvinit ¶ Each time you to start , restart , and stop Ceph daemons (or your entire cluster) you must specify at least one option and one command. States describe the current PG status. Restart the other monitors one by one at time. If the rook-ceph-agent pod is not running then it cannot perform this function. The clocks on the hosts running the ceph-mon monitor daemons For example, to restart a ceph-osd daemon with the ID osd01: # systemctl restart [email protected] Note that I am in /root/ceph-deploy on my monitor/admin server. systemctl restart [email protected]<MON-ID>. Jul 17, 2020 · ceph osd set noout Upgrade monitors by installing the new packages and restarting the monitor daemons ; systemctl restart ceph-mon. Generally speaking, an OSD with slow requests is every OSD that is not able to service the I/O operations per second (IOPS) in Aug 03, 2019 · Aug 03 06:15:35 proxmox systemd[1]: [email protected] Inject the monmap. . On the master node, create a cephfs volume in your cluster, by running ceph fs volume create data. 8 Configuring the Storage Cluster. Below is an example of the rook-ceph-agent pods failing to get to the Running status because they are in a CrashLoopBackOff To increase the logging level, you can either edit ceph. Currently I’ve been using it on Ubuntu Server 12. After the pod restart, the new settings should be in effect. To inject parameters, use the ceph tell command: Then, set the logging level for the OSD log Oct 18, 2016 · Ceph monitor logs also witnessed the problem as found later: 2016-09-10 07:39:46. Jun 17, 2020 · If an initial deploy of Ceph fails, perhaps due to improper configuration or similar, the cluster will be partially formed and will need to be reset for a successful deploy. If you are a new customer, register now for access to product evaluations and purchasing capabilities. run 'ceph -s' Jul 17, 2020 · ceph osd set noout Upgrade monitors by installing the new packages and restarting the monitor daemons ; systemctl restart ceph-mon. Feb 04 23:40:03 pve2 systemd[1]: Stopped Ceph cluster monitor daemon. It is seen that the OSD process is running. com> 于2020年10月29日周四 下午2:38写道: We will then rebuild the monitor database, overwrite the corrupted copy, and restart the monitor to bring the Ceph cluster back online. All other daemons bind to arbitrary addresses and register themselves with the monitors. service which triggers a. Aug 18, 2015 · First remove all CEPH rpms from your CEPH hosts, this includes Monitor nodes and OSD nodes. automatically set journal file name as osd. "Command failed (workunit test rados/test. You can watch the progress by running ceph fs ls (to see the fs is configured), and ceph -s to wait for HEALTH_OK. 1. 2. Either calling "systemctl restart ceph. Ceph is a distributed object, block, and file storage platform - ceph/Monitor. To start, stop, or restart all the Ceph daemons, execute the following commands from the local node running the Ceph daemons, and as root : Start All Ceph Daemons. In order to do this the operator should remove the ceph_mon_config volume from each Ceph monitor node: For some reason the docker container that was running the monitor restarted and won't restart. Oct 28, 2020 · [ceph-users] Re: monitor sst files continue growing Zhenshi Zhou Wed, 28 Oct 2020 23:44:03 -0700 MISTAKE: version is 14. From the context menu, select Services > Ceph. 28. target 7. 39. conf. conf--in a central fashion. 168. Feb 07, 2020 · Feb 04 23:40:03 pve2 systemd[1]: [email protected] target Once all monitors are up, verify that the monitor upgrade is complete by looking for the octopus string in the mon map ceph mon dump | grep min_mon_release The output should show : min_mon_release 15 (octopus) Feb 14, 2019 · Description: After full cluster restart, even though all the rook-ceph pods are UP, ceph status reports one particular OSD( here OSD. 服务需要正常工作,一是对收到的命令进行响应(当然命令也封装在消息中),二是对收到的消息进行响应,如果需要进行paxos round,则发起决议,待完成后更新处理结果, 这些流程基类PaxosService都提供了模板 Feb 14, 2019 · Description: After full cluster restart, even though all the rook-ceph pods are UP, ceph status reports one particular OSD( here OSD. paxos算法主要用来解决分布式系统中的数据一致性,ceph monitor中实现了paxos算法,然后抽象出了PaxosService基类,基于此实现了不同的服务, 比如MonmapMonitor, OSDMonitor, PGMonitor等,分别对应monmap, osdmap, pgmap。. We also recommend that you upgrade all the daemons in your cluster Apr 09, 2020 · In the webinterface select a node, and then the "Ceph → Monitor" panel, there you can select a monitor and restart it there, one after the other. sh times out on master. activate-all" should start all available OSDs which haven't been started. Exit the first Ceph monitor, mon. ubuntu. Be careful not to delete anything. To recover the cluster, we will shut down two of the monitors and leave a single failed monitor running. Ceph Monitors. senta04. * injectargs "--mon_pg_warn_max_per_osd 0" Once 'ceph versions' shows all your OSDs have updated to Luminous, you can complete the upgrade (and enable new features or functionality) with $ ceph osd require-osd-release luminous This prevents OSDs older than Luminous from booting or joining the cluster (the monitors refuse to mark them "up"). The Ceph check is included in the Datadog Agent package, so you don’t need to install anything else on your Ceph servers. Starting in Mimic, we also store configuration information in the monitors internal database, and seamlessly manage Apr 13, 2017 · Now, start/restart the containers. First, make sure to stop all your monitors. Ceph OSD Daemons. I got a cluster with 3 OSD nodes and 2 additional nodes for RGW. run 'systemctl restart ceph-mgr. I tried to restart them with ceph orch apply mon label:mon but that didn't change anything. Dec 08 12:12:58 mon2 systemd[1]: Stopped Ceph cluster monitor daemon. If the command returns a health status (HEALTH_OK, HEALTH_WARN, or HEALTH_ERR), the Monitors are able to form a quorum. Log in to each Ceph Monitor host via SSH and run the following command there: [email protected] > cephadm unit --name mon. For DeepSea 0. In Red Hat Ceph Storage, all process management is done through the Systemd service. I added the repo for Nautilus and upgraded ceph-common, but the problem persists. Eckert Jun 14, 2018 · New in Mimic: centralized configuration management. Prerequisites. 4 and newer, all roles you have configured restart in the following order: Ceph Monitor, Ceph Manager, Ceph OSD, Metadata Server, Object Gateway, iSCSI Gateway, NFS Ganesha. MDS: the pods are stateless and can be restarted as needed. Feb 19 11:31:47 thor systemd[1]: Stopped Ceph cluster monitor daemon. Follow the same processes for the standby daemons. salt -C <HOST_NAME> cmd. Your Red Hat account gives you access to your profile, preferences, and services, depending on your status. Update clients and Ceph daemons with the ip addresses of the mons when they failover; Mgr ¶ May 03, 2018 · This will build an image named ceph_exporter. The Manager and OSD docker containers don't seem to be affected at all. CEPH Installation. Starting, Stopping, Restarting All Daemons. # ceph tell mon. ceph-node1 is the monitor name for 192. 2:再次检查,发现问题已经解决 前言 实验环境部署ceph集群(结合openstack多节点),重启之后ceph集群的osd服务出现问题,解决如下 ceph+openstack多 OSDs: restart your the pods by deleting them, one at a time, and running ceph -s between each restart to ensure the cluster goes back to “active/clean” state. Copy. Feb 04 23:40:03 pve2 systemd[1]: [email protected] Nov 28, 2016 · OSDs are supposed to be enabled by UDEV rules automatically. <user>. #firewall-cmd --zone=public --add-port=6800-7300/tcp --permanent Ceph Service Monitoring. Ceph Monitors manage a central database of configuration options that affect the behavior of the whole cluster. ) to ensure that they are all on the same release. scan for OSDs on all available disks. Log in to Your Red Hat Account. You can use vanilla docker commands Dec 02, 2020 · In these cases, disabling the monitor systemd unit with systemctl disable [email protected] and restarting ceph on the affected node with systemctl restart ceph. service: Scheduled restart job, restart counter is at 6. MON_CLOCK_SKEW. The rook-ceph-agent pods are responsible for mapping and mounting the volume from the cluster onto the node that your pod will be running on. Feb 19 11:31:47 thor systemd[1]: Failed to start Ceph cluster monitor daemon. accepter no incoming connection? sd = -1 errno 24 (24) Too many open files You should keep in mind that Ceph monitors log excessively even in minimal debug mode and you should have some log monitoring and alerting mechanism for Monitor crashed in creating pool in CrushTester::test_with_fork() Failed to reset failed state of unit [email protected] For details about ceph health see Understanding Ceph health. The default Ceph Oct 30, 2020 · Make sure you pass correct monitor name, Provided an example below mon. The larger the database, the longer the compaction would take. Finally, migrate 2 monitor daemons to complete the migration. Below is an example of the rook-ceph-agent pods failing to get to the Running status because they are in a CrashLoopBackOff 1. not work on all systems, so PVE installs a ceph. Ceph will handle the necessary orchestration itself, creating the necessary pool, mds daemon, etc. It may take a while depending on your internet and disk write speeds. Now purge all config files. For pg status, I added some OSDs in this cluster, and it Frank Schilder <[email protected] Update clients and Ceph daemons with the ip addresses of the mons when they failover; Mgr ¶ Oct 29, 2020 · MGR is stopped by me cause it took too much memories. If you have separate admin and monitor nodes then run these commands from your admin node. Ceph Metadata Servers. d/conf. ceph --admin-daemon <full_path_to_asok_file> <command>. 3. Verify that the nodes are in the HEALTH_OK status after each Ceph Monitor restart. Setup CephFS¶. Disable Ceph monitors and Ceph manager¶ Disable Ceph manager on host controller-0 and controller-1. target. 8. Eckert [ceph-users] Re: one of 3 monitors keeps going down Eugen Block [ceph-users] Re: one of 3 monitors keeps going d Sebastian Wagner [ceph-users] Re: one of 3 monitors keeps goi Eugen Block [ceph-users] Re: one of 3 monitors keeps Robert W. In ceph, state machine is called “recovery state machine”. As example see: Toggle signature. Dec 22, 2015 · How-to deal with Ceph Monitor DB compaction? Then we restart one of the monitor to trigger the compact process. Best regards, A Ceph Monitor is in the probing state if it is looking for other Ceph Monitors. Remove "no out" Wait till HEALTH_OK and all OSDs are up. To start a ceph-mon demon that runs on the ceph-monitor01 host: # systemctl start [email protected] If not, address any Monitor problems first. The Ceph service monitoring page displays a summary of the current usage of a Ceph cluster, including total cluster capacity, used capacity, and number of OSDs, pools, objects. service: Scheduled restart job, restart counter is at 5. target has always fixed the issue. Aug 02, 2018 · Monitor the mons periodically (every minute) to ensure they remain in quorum. 2:再次检查,发现问题已经解决 前言 实验环境部署ceph集群(结合openstack多节点),重启之后ceph集群的osd服务出现问题,解决如下 ceph+openstack多 Apr 30, 2021 · [ceph-users] one of 3 monitors keeps going down Robert W. 425986 7f0b894fe700 0 accepter. Edit: Just to note, while replicating the issue, I was just making sure to follow every step you took. Our ceph network is 10g with spf connections with the exception of the new machine. ceph-mon -i {mon-id} --inject-monmap {tmp}/{filename} Restart the monitors. e 300), ceph monitor will report warning. [ceph-users] Re: monitor Once 'ceph versions' shows all your OSDs have updated to Luminous, you can complete the upgrade (and enable new features or functionality) with $ ceph osd require-osd-release luminous This prevents OSDs older than Luminous from booting or joining the cluster (the monitors refuse to mark them "up"). Step 4: Start Prometheus ceph exporter client container. (Note that if the above commands fail completely, this indicates a full monitor outage. Mar 28, 2017 · If the above is more than the default (i. If not – add this variable into the general [OSD] section Aug 02, 2018 · Monitor the mons periodically (every minute) to ensure they remain in quorum. target 14. Print the binary versions of all currently running Monitor instances in your cluster. Copy ceph. We will then rebuild the monitor database, overwrite the corrupted copy, and then restart the monitor to bring the Ceph cluster back online. To retrieve Ceph metrics and send them to Sysdig Monitor you just need to have a Sysdig Monitor agent running in one of the monitor nodes but since any node can go down at any point in time in a highly available cluster, we recommend installing Sysdig Monitor agent in all of them, as will also help to collect system level metrics specific of that host. 6. When one or more monitors are down, clients will initially have difficulty connecting to the cluster. g. You can find the active ceph-mgr in the ceph status: Jun 25, 2019 · CEPH集群重启后ceph osd status和ceph-s命令查看发现节点服务器osd服务不成功的解决方案 文章目录前言一:报错1. service: Failed with result 'exit Verify that Monitors have a quorum by using the ceph health command. Server is still up and I can restart the monitor every time. service Dec 08 12:12:58 mon2 systemd[1]: Failed to start Ceph cluster monitor daemon. 1:解决1. As a general rule, we recommend upgrading all the daemons of a specific type (e. Dec 08 12:12:58 mon2 systemd[1]: start request repeated too quickly for [email protected] If after a certain timeout a given monitor has not joined the quorum back it will be failed over and replace by a new monitor. Every state machine contains two important elements, states and events. 3 Operating an individual service on a node # Edit source Jan 30, 2017 · How to Monitor Ceph with Sysdig Monitor. I initially got 5 monitors. 2. network errors. Oct 28, 2017 · Generally, it is just like the pic below. I've never done this kind of migration on Ceph, but you should be able to do it like this: check the Crush map and free space before doing anything. run 'systemctl restart ceph-mon. To restart all services that belong to a Ceph cluster with ID b4b30c6e-9681-11ea-ac39-525400d7702d, run: [email protected] > systemctl restart ceph-b4b30c6e-9681-11ea-ac39-525400d7702d. Register. In the webinterface select a node, and then the "Ceph → Monitor" panel, there you can select a monitor and restart it there, one after the other. Injection must be done while the daemon is not running. Using ceph-config, the script fails on "Attempting to pull monitor map from existing cluster. sh)" - rados/test. Jun 11, 2021 · Ceph. osd: health check on the ceph osds; status: ceph health status check, periodically check the Ceph health state and reflects it in the CephCluster CR status field. Jun 25, 2019 · CEPH集群重启后ceph osd status和ceph-s命令查看发现节点服务器osd服务不成功的解决方案 文章目录前言一:报错1. To configure the Storage Cluster, perform the following steps on the administration node: Initialize Ceph monitoring and deploy a Ceph Monitor on one or more nodes in the Storage Cluster, for example: # ceph-deploy mon create-initial # ceph-deploy mon create ceph-node {2,3,4} Note. Dec 08, 2020 · Dec 08 12:12:58 mon2 systemd[1]: [email protected] 1) as down. If a mon goes down and does not automatically restart with the built-in Kubernetes mechanisms, the operator will add a new mon to the quorum and remove the failed mon from quorum. But it started and campacting for a long time, seems it has no end. Eckert Aug 18, 2015 · First remove all CEPH rpms from your CEPH hosts, this includes Monitor nodes and OSD nodes. I manage the cluster with cephadm. service: Service hold-off time over, scheduling restart. Restart the Monitor daemons. The next step is to propagate the modified monmap to the new monitors, and inject the modified monmap into each new monitor. Restart the monitor daemon that is down as soon as possible to reduce the risk of a subsequent monitor failure. Oct 30, 2013 · In order to restore the Ceph Monitor quorum, remove unhealthy Ceph Monitors form the monmap by following these steps: Stop all Ceph Monitors. See Troubleshooting Ceph Monitors for details. Ceph Deploy. Oct 28, 2020 · I set "mon compact on start = true" and restart one of the monitors. there by increasing the time for a node Mar 02, 2014 · After modifing ceph source and re-make install, these scripts could make it easy to cleanup and re-deploy monitor and OSD, then see the result. log on a monitor). I see this in the journal: Aug 28 20:40:55 sun-gcs02-osd01 systemd[1]: Starting Ceph Monitor Restart daemons. Following is the log seen in the OSD node 2019-0 Using ceph-config, the script fails on "Attempting to pull monitor map from existing cluster. dk> 于2020年10月29日周四 下午3:27写道: > Your problem is the overall cluster health. Aug 03 06:15:35 proxmox systemd[1]: [email protected] Monitor health is the most critical piece of the equation that Rook actively monitors. Verify /etc/ceph/ceph. It defines like: class RecoveryMachine : state_machine< RecoveryMachine, Initial >. conf on the OSD nodes first and check if there is “mon max pg per osd” variable set. In Red Hat Ceph Storage 2, all process management is done through the Systemd service. # ceph-deploy purge mon01 osd01 osd02 osd03. Aug 01, 2020 · Add API to cancel AIO requiest (for RBD and for Rados). To keep the downtime low and to find potential issues as early as possible, nodes are restarted sequentially. Running Ceph as a systemd Service. When all Ceph Monitor daemons are upgraded, on the administration node, verify the monitor upgrade is complete: To restart all services that belong to a Ceph cluster with ID b4b30c6e-9681-11ea-ac39-525400d7702d, run: [email protected] > systemctl restart ceph-b4b30c6e-9681-11ea-ac39-525400d7702d. target Once all monitors are up, verify that the monitor upgrade is complete by looking for the octopus string in the mon map ceph mon dump | grep min_mon_release The output should show : min_mon_release 15 (octopus) 调用流程: Monitor::bootstrap() -> Monitor::_reset() -> PaxosService::restart() -> FooService::on_restart() Process.

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