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The procedures in this runbook require admin permissions to complete.
Error / Incident
There seems to be 0 or more than 1 DRBD primaries, that might mean many things:
- If there's 0 primaries -> the cluster is not working, and one of the nodes might have to be forced to become primary
- If there's >1 primaries -> there's a split brain, one of the nodes should be stopped and rejoined as secondary
You can go to both of the nodes and see the current drbd status by running:
root@labstore1005:~# cat /proc/drbd version: 8.4.7 (api:1/proto:86-101) srcversion: F7D2F0C9036CD0E796D5958 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate B r----- ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 3: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate B r----- ns:0 nr:385762660 dw:385762660 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 4: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate B r----- ns:0 nr:1229421488 dw:1229421488 dr:1471404 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
This is how it should look if it runs ok, you can see that there's 3 drbd resources, all connected, for with this node is Secondary and the remote node is Primary, and both of them are UpToDate.
For more info check Portal:Data_Services/Admin/Shared_storage#DRBD
Add here any issues you might encounter.
Communication and support
Support and administration of the WMCS resources is provided by the Wikimedia Foundation Cloud Services team and Wikimedia Movement volunteers. Please reach out with questions and join the conversation:
Discuss and receive general support
- Chat in real time in the IRC channel #wikimedia-cloud connect, the bridged Telegram group, or the bridged Mattermost channel
- Discuss via email after you subscribed to the cloud@ mailing list
Receive mail announcements about critical changes
Subscribe to the cloud-announce@ mailing list (all messages are also mirrored to the cloud@ list)
Track work tasks and report bugs
Use a subproject of the #Cloud-Services Phabricator project to track confirmed bug reports and feature requests about the Cloud Services infrastructure itself
Learn about major near-term plans
Read the News wiki page
Read news and stories about Wikimedia Cloud Services
Read the Cloud Services Blog (for the broader Wikimedia movement, see the Wikimedia Technical Blog)
Add here any phabricator tickets to incidents you might have.