[LU-4020] HSM copytool event monitoring capabilities

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.1
• Labels: HSM
• Assignee: Michael MacDonald (Inactive)
• Reporter: Michael MacDonald (Inactive)

Description

This ticket is to track the work being done to add copytool event monitoring capabilities to liblustreapi. The end result will be that external monitoring agents are able to read an event stream out of a FIFO.

Issue Links

• is related to: LU-4751 sanity-hsm test 70, 71 and 72 fails with "Failed to start copytool monitor "
• is related to: LU-3734 Posix Copytool Application Behaviour

Comments

[Peter Jones]

Landed for 2.6

[Bob Glossman (Inactive)]

backport to b2_5;
http://review.whamcloud.com/9512

[Michael MacDonald (Inactive)]

Attached a small proof-of-concept for generating valid JSON with PyYAML. The main takeaway is that the JSON we are currently generating is indeed valid YAML. Given that the DLC patches that bring in libyaml have not yet landed on master, and won't land for 2.5.x, I propose that we move forward with the existing simple JSON generator, but plan to replace it with libyaml when that becomes available.

[Bruno Faccini (Inactive)]

I have pushed a new patch-set #6 for http://review.whamcloud.com/7790. Where after re-base, I tried to answer to the multiple comments from previous patch-sets.

Andreas, is the new liblustreapi_json.c, what you wanted ? I am not really aware of this licensing protocols and thus about their packaging needs … What about the specific data-structures definitions being used, do they need to be in a separate .h file too with the appropriate header?

Jinshan, I did not remove the head-list structure llapi_json_item_list, because I find code more easy to read than without.