[LU-5092] nodemap: transfer idmaps between MGS, MDT, OST

• Type: Technical task
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.7.0
• Labels: patch
• Assignee: Kit Westneat (Inactive)
• Reporter: Kit Westneat (Inactive)

Description

This ticket relates to transfer of idmap information between the server nodes. The goal is that the MGS stores the UID/GID maps in an index (similar to how quota is storing the master quota files) and these are transferred to the other servers to keep the mappings consistent.

Issue Links

• is related to: LU-6409 sleeping while atomic in nodemap_destroy
• is related to: LU-3291 IU UID/GID Mapping Feature

Comments

[Peter Jones]

Landed for 2.9

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/17503/
Subject: LU-5092 nodemap: save nodemaps to targets for caching
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: be7efb4ce06996444c08914305a73833a7123eeb

[Kit Westneat (Inactive)]

Hi Peter,

It would be best if it did, but it's not mandatory. Without that patch, if the MGS goes away, the OSSes and MDSes will not be able to load the nodemap configuration if they get restarted.

Thanks,
Kit

[Peter Jones]

Kit

It looks like there is still one patch - http://review.whamcloud.com/#/c/17503/ - being tracked under this ticket. Does that need to land for 2.9?

Peter

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/18554/
Subject: LU-5092 nodemap: remove nodemap_idx_action, only act on MGS
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: ffe234a077576f0f66f6fe9c165be180133be89a

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/16941/
Subject: LU-5092 nodemap: handle config changes while mid-flight
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: d3ca7a90b4a22908e212ef008fa78932541ef017

[Kit Westneat (Inactive)]

Change 16941 allows for config files > the size of 1 RPC

Change 18554 sets up 17503, which caches the config on targets so they don't need the MGS to startup with nodemap.

So change 16941 is stand alone, but 17503 requires that 18554 be landed first.

[James A Simmons]

Kit was is the dependency chain now? Currently it is confusing to know what order is important.

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/11830/
Subject: LU-5092 nodemap: transfer nodemaps between MGS, MDTs, and OSTs
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 685b0943eb4fe55720458326a5d6c4949457bf7a

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/19674/
Subject: LU-5092 nodemap: users of ted_nodemap should take ref
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 34ba26ea9884df0758f8ec8dd1047b4cf474af09