[LU-17628] add option to restrict lfs setstripe

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Patrick Farrell (Inactive)
• Reporter: Patrick Farrell (Inactive)

Description

In some settings, it's not desirable for users to be able to set their own striping.  This is purely a 'convenience' restriction, where the admin prefers users not set their own striping to avoid user error, and not a security restriction.  This is for sites which have a sensible default striping and prefer not to modify it.

The goal here is to avoid user error.  However, some applications use the Lustre API to set their own striping, and it's not desirable for such applications to fail.  So this check is special-cased to check if the 'lfs' command is being used and only return error in that case.  The idea is that a determined user could get around this, but it will be much harder for users to set incorrect striping without intending to do so.  (Users making inadvertent striping errors is a persistent cause of OST imbalance.)

Issue Links

• is duplicated by: LU-14751 Prevent users from setting dir and file stripping
• is related to: LU-6689 Requesting a tunable that prevents regular users from setting the initial OST

Comments

[Peter Jones]

Merged for 2.16

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/54341/
Subject: LU-17628 lfs: add lfs_setstripe admin restrict
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 5b99b881c412993f239bf8e708ae9526ba1bc9e3

[Gerrit Updater]

"Patrick Farrell <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/54341
Subject: LU-17628 lfs: add lfs_setstripe admin restrict
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: be1094197fb18f76537c43c3f5a225e0a3c385bc