Ceph-s cluster error report too many PGs per OSD what to do
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Background
An error was reported in the cluster status, as follows:
# ceph-s cluster 1d64ac80-21be-430e-98a8-b4d8aeb18560 health HEALTH_WARN max 300) monmap e1: 1 mons at {node1=109.105.115.67:6789/0} election epoch 4, quorum 0 node1 osdmap e49: 2 osds: 2 up, 2 in flags sortbitwise,require_jewel_osds pgmap v1256: 912 pgs, 23 pools, 4503 bytes data, 175 objects 13636 MB used 497 GB / 537 GB avail 912 active+clean analysis
The reason for the problem is that the number of cluster osd is relatively small. During my testing, a large number of pool were created due to the construction of rgw gateway, integration with OpenStack, etc., and each pool takes up some pg. Ceph cluster has a default value for each disk, as if each osd is 300 pgs, but this default value can be adjusted, but adjusting too large or too small will have a certain impact on the performance of the cluster. Because this is a test environment, as long as we can eliminate the error report. Query the maximum pg alarm value under each osd:
$ceph-- show-config | grep mon_pg_warn_max_per_osdmon_pg_warn_max_per_osd = 300 solution
In the configuration file, increase the alarm threshold of this option for the cluster by adding it to the ceph.conf (/ etc/ceph/ceph.conf) configuration file of the mon node as follows:
$vi / etc/ceph/ ceph.confs [global] .mon _ pg_warn_max_per_osd = 1000
Restart the monitor service:
$systemctl restart ceph-mon.target
Check the ceph cluster status again.
$ceph-s
Cluster 1d64ac80-21be-430e-98a8-b4d8aeb18560 health HEALTH_OK monmap e1: 1 mons at {node1=109.105.115.67:6789/0} election epoch 6, quorum 0 node1 osdmap e49: 2 osds: 2 up, 2 in flags sortbitwise,require_jewel_osds pgmap v1273: 912 pgs, 23 pools, 4503 bytes data, 175 objects 13636 MB used, 497 GB / 537 GB avail 912 active+clean are all the contents of the article "ceph-s Cluster error too many PGs per OSD how to do" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
