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ceph/doc/mgr/mds_autoscaler.rst

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doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
MDS Autoscaler Module
=====================
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
The MDS Autoscaler Module monitors file systems to ensure sufficient MDS
daemons are available. It works by adjusting the placement specification for
the orchestrator backend of the MDS service. To enable, use:
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
.. sh:
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
ceph mgr module enable mds_autoscaler
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
The module will monitor the following file system settings to inform
placement count adjustments:
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
- ``max_mds`` file system setting
- ``standby_count_wanted`` file system setting
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
The Ceph monitor daemons are still responsible for promoting or stopping MDS
according to these settings. The ``mds_autoscaler`` simply adjusts the
number of MDS which are spawned by the orchestrator.
doc: document the mds_autoscaler mgr plugin The MDS Autoscaler provides automation to maintain a required count of MDSs in the system. The MDS count in the system can be afected by: * max_mds config option * standby_count_wanted config option * death of an active MDS Rank Fixes: https://tracker.ceph.com/issues/46884 Signed-off-by: Milind Changire <mchangir@redhat.com>
2020-10-20 03:49:48 +00:00
doc: update mds_autoscaler documentation to reflect recent changes Notably, Sage changed how this worked in [1]. [1] 6d8c0e4722eb5f3014dc76f6733afea08bcc8e72 Fixes: https://tracker.ceph.com/issues/51187 Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
2021-04-21 18:09:53 +00:00
.. note: There is no CLI or module configurations as of now. Enable or disable
the module to turn on or off.