80 lines
2.2 KiB
Markdown
80 lines
2.2 KiB
Markdown
# Ceph Maintenance
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This MOP covers Maintenance Activities related to Ceph.
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## Table of Contents ##
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<!-- TOC depthFrom:1 depthTo:6 withLinks:1 updateOnSave:1 orderedList:0 -->
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- Table of Contents
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- 1. Generic commands
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- 2. Replace failed OSD
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## 1. Generic Commands ##
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### Check OSD Status
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To check the current status of OSDs, execute the following:
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```
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utilscli osd-maintenance check_osd_status
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```
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### OSD Removal
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To purge OSDs in down state, execute the following:
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```
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utilscli osd-maintenance osd_remove
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```
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### OSD Removal By OSD ID
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To purge OSDs by OSD ID in down state, execute the following:
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```
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utilscli osd-maintenance remove_osd_by_id --osd-id <OSDID>
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```
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### Reweight OSDs
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To adjust an OSD’s crush weight in the CRUSH map of a running cluster, execute the following:
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```
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utilscli osd-maintenance reweight_osds
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```
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## 2. Replace failed OSD ##
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In the context of a failed drive, Please follow below procedure.
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Disable OSD pod on the host from being rescheduled
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kubectl label nodes --all ceph_maintenance_window=inactive
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Replace `<NODE>` with the name of the node were the failed osd pods exist.
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kubectl label nodes <NODE> --overwrite ceph_maintenance_window=active
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Replace `<POD_NAME>` with failed OSD pod name
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kubectl patch -n ceph ds <POD_NAME> -p='{"spec":{"template":{"spec":{"nodeSelector":{"ceph-osd":"enabled","ceph_maintenance_window":"inactive"}}}}}'
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Following commands should be run from utility container
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Capture the failed OSD ID. Check for status `down`
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utilscli ceph osd tree
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Remove the OSD from Cluster. Replace `<OSD_ID>` with above captured failed OSD ID
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utilscli osd-maintenance osd_remove_by_id --osd-id <OSD_ID>
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Remove the failed drive and replace it with a new one without bringing down the node.
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Once new drive is placed, change the label and delete the concern OSD pod in `error` or `CrashLoopBackOff` state. Replace `<POD_NAME>` with failed OSD pod name.
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kubectl label nodes <NODE> --overwrite ceph_maintenance_window=inactive
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kubectl delete pod <POD_NAME> -n ceph
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Once pod is deleted, kubernetes will re-spin a new pod for the OSD. Once Pod is up, the osd is added to ceph cluster with weight equal to `0`. we need to re-weight the osd.
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utilscli osd-maintenance reweight_osds
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