Ceph slow ops

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Ceph slow ops

Before troubleshooting your OSDs, check your monitors and network first. If you execute ceph health or ceph -s on the command line and Ceph returns a health status, it means that the monitors have a quorum.

ceph slow ops

Check your networks to ensure they are running properly, because networks may have a significant impact on OSD operation and performance. A good first step in troubleshooting your OSDs is to obtain information in addition to the information you collected while monitoring your OSDs e. See Logging and Debugging for details to ensure that Ceph performs adequately under high logging volume. Use the admin socket tool to retrieve runtime information. For details, list the sockets for your Ceph processes:.

Filesystem issues may arise. Execute df --help for additional usage. To retrieve diagnostic messages, use dmesg with lessmoregrep or tail. For example:. Periodically, you may need to perform maintenance on a subset of your cluster, or resolve a problem that affects a failure domain e.

Once the cluster is set to nooutyou can begin stopping the OSDs within the failure domain that requires maintenance work. Placement groups within the OSDs you stop will become degraded while you are addressing issues with within the failure domain.

Finally, you must unset the cluster from noout. Under normal circumstances, simply restarting the ceph-osd daemon will allow it to rejoin the cluster and recover. Configuration File: If you were not able to get OSDs running from a new installation, check your configuration file to ensure it conforms e.

Check Paths: Check the paths in your configuration, and the actual paths themselves for data and journals. If you separate the OSD data from the journal data and there are errors in your configuration file or in the actual mounts, you may have trouble starting OSDs. If you want to store the journal on a block device, you should partition your journal disk and assign one partition per OSD.

Ceph. Анатомия катастрофы / Артемий Капитула (RCNTEC)

Check Max Threadcount: If you have a node with a lot of OSDs, you may be hitting the default maximum number of threads e.

You can increase the number of threads using sysctl to see if increasing the maximum number of threads to the maximum possible number of threads allowed i. If increasing the maximum thread count resolves the issue, you can make it permanent by including a kernel.

Kernel Version: Identify the kernel version and distribution you are using. Check the OS recommendations to ensure you have addressed any issues related to your kernel.Apply Clear. Selected Columns All Columns. Sign in Register. Search :. Issues View all issues Calendar Gantt Tags administration arm64 cephadm configuration development documentation e2e feature-gap grafana i18n installation logging low-hanging-fruit management monitoring notifications osd performance qa refactoring regression rest-api rgw security testing usability.

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Both for C and for Python. Spent time Pull request ID. Futher testing result for the issue "ceph: avoid bit page index overflow". Mon High CPU usage when another mon syncing from it. No connection adapters were found for 'teuthology.

XXX': Permission denied" in rados. TestLockDuration" in upgrade:firefly-x-hammer-distro-basic-openstack. TestIOPP" in upgrade:luminous-x-mimic. A file passed to bulk delete request is not being parsed correctly.

A workunit to test rgw ldap authentication should be created. Ability to add comments in certain views of Ceph daemons or status. Ability to move objects to a second storage tier based on policy. Aborted dynamic resharding should clean up created bucket index objs. Add 'skipped jobs' into teuthology-suite logging. Add --wait-for-complete flag to ceph pg scrub and repair, and deep-scrub. Add 0. Add a flag to radosgw-agent indicating whether exceptions should be propagated.

Add a section on how to consume ops log via unix socket. Add a test for all radosgw-admin commands and parameters.

(11)ceph 告警:1 slow ops, oldest one blocked for

Add ability to check yaml correctness instead of error.Before troubleshooting your OSDs, check your monitors and network first. If you execute ceph health or ceph -s on the command line and Ceph returns a health status, the return of a status means that the monitors have a quorum.

Check your networks to ensure they are running properly, because networks may have a significant impact on OSD operation and performance.

A good first step in troubleshooting your OSDs is to obtain information in addition to the information you collected while monitoring your OSDs e. See Logging and Debugging for details to ensure that Ceph performs adequately under high logging volume. Use the admin socket tool to retrieve runtime information. For details, list the sockets for your Ceph processes:. Filesystem issues may arise. Execute df --help for additional usage.

To retrieve diagnostic messages, use dmesg with lessmoregrep or tail. For example:. Periodically, you may need to perform maintenance on a subset of your cluster, or resolve a problem that affects a failure domain e. Once the cluster is set to nooutyou can begin stopping the OSDs within the failure domain that requires maintenance work.

Placement groups within the OSDs you stop will become degraded while you are addressing issues with within the failure domain. Finally, you must unset the cluster from noout. Under normal circumstances, simply restarting the ceph-osd daemon will allow it to rejoin the cluster and recover. Configuration File: If you were not able to get OSDs running from a new installation, check your configuration file to ensure it conforms e.

Check Paths: Check the paths in your configuration, and the actual paths themselves for data and journals. If you separate the OSD data from the journal data and there are errors in your configuration file or in the actual mounts, you may have trouble starting OSDs.

If you want to store the journal on a block device, you should partition your journal disk and assign one partition per OSD. Check Max Threadcount: If you have a node with a lot of OSDs, you may be hitting the default maximum number of threads e. You can increase the number of threads using sysctl to see if increasing the maximum number of threads to the maximum possible number of threads allowed i. If increasing the maximum thread count resolves the issue, you can make it permanent by including a kernel.

Kernel Version: Identify the kernel version and distribution you are using. Check the OS recommendations to ensure you have addressed any issues related to your kernel.

If it segment faults again, contact the ceph-devel email list and provide your Ceph configuration file, your monitor output and the contents of your log file s. 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:.

Specifically, you will get a warning whenever there are ceph-osd processes that are marked in and down. You can identify which ceph-osds are down with:. If the daemon stopped because of a heartbeat failure, the underlying kernel file system may be unresponsive.

Check dmesg output for disk or other kernel errors. If the problem is a software error failed assertion or other unexpected errorit should be reported to the ceph-devel email list. In an operational cluster, you should receive a warning when your cluster is getting near its full ratio.

The mon osd full ratio defaults to 0.Added by Wido den Hollander almost 2 years ago. Updated 5 months ago. We had issues in the lab with OSD failure reports not getting cleaned up properly from that op tracker, but I don't think that particular log has turned up and it's a bit confusing how that could have happened.

This cluster was installed today and we started to do some physical tests by pulling disks, pulling power cords, etc, etc. Everything recovered just fine, but I saw these messages pop up in the logs and also in 'ceph health'. I just hit this on a The log is basically identical to the one Wido reported.

ceph slow ops

It seems osd. I am also seeing this on latest mimic So far it seems like its cosmetic and has no impact. I see the same symptoms on a system running We had this happen twice this week on a v The cluster was recently upgraded from v I've posted all logs here: ceph-post-file: ccef-fabbea6c6e Leader ops are here: ceph-post-file: e48ff1eba-d84aabf6 Peon ops are here: ceph-post-file: 28ec1b-4dbd91f28c8.

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I restart osd. I deploy v I am encountering similar issues on a cluster with all daemons running ceph version While running with --resolve-parent, the script "backport-create-issue" noticed that all backports of this issue are in status "Resolved" or "Rejected".

Also available in: Atom PDF. Sign in Register. Search :. Overview Activity Roadmap Issues. Issues View all issues Summary Tags low-hanging-fruit usability. Source :. Affected Versions :. Pull request ID :. Crash signature :. When setting up a Mimic History 1 Updated by Greg Farnum almost 2 years ago What's the output of "ceph versions" on this cluster? Although the message is gone in the status the ops are still there. I've dumped the ops on the peon and leader mons.

The problem happend at ,and i restart three osd ordered between to The following tables list the most common error messages that are returned by the ceph health detail command, or included in the Ceph logs. The tables provide links to corresponding sections that explain the errors and point to specific procedures to fix the problems. The ceph health detail command returns an error message similar to the following one:. By default, this parameter is set to 0. Ceph returns the nearfull osds message when the cluster reaches the capacity set by the mon osd nearfull ratio defaults parameter.

Ceph distributes data based on the CRUSH hierarchy in the best possible way but it cannot guarantee equal distribution.

The main causes of the uneven data distribution and the nearfull osds messages are:. To view how much space OSDs use on particular nodes. Use the following command from the node containing nearful OSDs:. The ceph health command returns an error similar to the following one:.

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One of the ceph-osd processes is unavailable due to a possible service failure or problems with communication with other OSDs. As a consequence, the surviving ceph-osd daemons reported this failure to the Monitors. If the ceph-osd daemon is not running, the underlying OSD drive or file system is either corrupted, or some other error, such as a missing keyring, is preventing the daemon from starting.

Slow requests with Ceph: ‘waiting for rw locks’

In most cases, networking issues cause the situation when the ceph-osd daemon is running but still marked as down. A partition is mounted if ceph-disk marks it as active. If a partition is preparedmount it. If a partition is unpreparedyou must prepare it first before mounting. See the following steps for instructions on how to troubleshoot and fix this error.

Check the corresponding log file to determine the cause of the failure. An EIO error message similar to the following one indicates a failure of the underlying disk:.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Already on GitHub? Sign in to your account. If we send it to the manager, it can be used to swap health states. Going to the central log merely sends out an unparsed text statement. Leeshine could you take a look? Leeshine sorry for the latency.

Surviving a Ceph cluster outage: the hard way

Leeshine cool. Leeshine thanks! Leeshine could you drop the commit for debugging? Skip to content.

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Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Conversation 33 Commits 4 Checks 0 Files changed.

Copy link Quote reply. View changes. Sign in to view. Leeshine Mar 1, Author Contributor what's the disadvantage of sending the slow request to cluster log? Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from e to d19cdd4 Mar 13, Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from d19cdd4 to be Mar 13, This comment has been minimized. Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from be to 7f57d12 Mar 13, Leeshine Mar 14, Author Contributor might want to drop this line.

Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from 7f57d12 to ce7a Mar 14, This was referenced Mar 15, Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from 7d8ffd3 to a88 Mar 28, Leeshine added 4 commits Mar 13, Leeshine force-pushed the Leeshine:wip-mon-op-tracker branch from a88 to ad80 Mar 28, Hide details View details tchaikov merged commit ea97c12 into ceph : master Mar 28, 4 of 5 checks passed.

Docs: build check OK - docs built. Signed-off-by all commits in this PR are signed. Unmodified Submodules submodules for project are unmodified. Leeshine deleted the Leeshine:wip-mon-op-tracker branch Mar 28, By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. We have deployed a ceph cluster with ceph version We have 3 storage nodes.

Learn more. Asked 1 year, 8 months ago. Active 1 year, 8 months ago. Viewed times. We are using ceph-ansible-stable Thanks in advance. Brayan Perera Brayan Perera 1 1 1 bronze badge.

ceph slow ops

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