work suspension: emit event for work dispatch status

[a7i]

What type of PR is this?
/kind feature

What this PR does / why we need it:

As requested by @chaunceyjiang here

Which issue(s) this PR fixes:
Part of #5217

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

It's definitely a noisy one (from e2e):

❯ kubectl get events -n karmada-es-member1 -w | grep Dispatch
3s          Normal    WorkDispatching          work/deploy-5tss401-798f586f4f      Work dispatching is in a suspended state.
20m         Normal    WorkDispatching          work/deploy-6vf8r-5b589484f8        Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/deploy-bxwzd-595fbff7bf        Work is being dispatched to member clusters.
6m45s       Normal    WorkDispatching          work/deploy-hkfc501-69b5894fb5      Work dispatching is in a suspended state.
14m         Normal    WorkDispatching          work/deploy-l266x01-76fc7f9ff5      Work dispatching is in a suspended state.
6m45s       Normal    WorkDispatching          work/deploy-rzncw-6744c9cc5b        Work is being dispatched to member clusters.
3s          Normal    WorkDispatching          work/deploy-s7q9t-59b55698          Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/deploy-w88m601-bd85567b7       Work dispatching is in a suspended state.
20m         Normal    WorkDispatching          work/karmadatest-2sln4-5796f9f496   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-4wvgj-6d65df87bc   Work is being dispatched to member clusters.
6s          Normal    WorkDispatching          work/karmadatest-5gkzs-67fff9c44f   Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-7ghrk-547498c494   Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-7hzl7-f9ffdb889    Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-9c8xx-66c4bc484c   Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-9nktb-6c954f5cc7   Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-bz5nj-54d5b9489b   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-d4qs5-8479459b8    Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-dh6r6-db77df5c     Work is being dispatched to member clusters.
6m48s       Normal    WorkDispatching          work/karmadatest-dmgpv-b7f786685    Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-gp2x7-76c5676f97   Work is being dispatched to member clusters.
15m         Normal    WorkDispatching          work/karmadatest-gwjdj-5bbb868769   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-lkhg2-598cdfd8f    Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-lpr9c-565d7d6685   Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-mtt5n-5cfd995d87   Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-nxmpt-757fbffcc8   Work is being dispatched to member clusters.
6m48s       Normal    WorkDispatching          work/karmadatest-nxvlk-5d78758d4b   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-p5xsf-5458cc87dc   Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-ptptm-ccd695964    Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-q2m4d-6bb7b6d845   Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-qvk7q-78cdb59c5    Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-qxpqr-6f47d77f5f   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-s28qq-7fbd957b9d   Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-sk6xl-8dff558d7    Work is being dispatched to member clusters.
6m50s       Normal    WorkDispatching          work/karmadatest-spvwt-7c8c6d855    Work is being dispatched to member clusters.
15m         Normal    WorkDispatching          work/karmadatest-tn6j2-6899866b67   Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-tsnsr-74cdf9bc5    Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-v7h8b-6c5574d9c6   Work is being dispatched to member clusters.
20m         Normal    WorkDispatching          work/karmadatest-vbgdk-6975fcd8dc   Work is being dispatched to member clusters.
6m48s       Normal    WorkDispatching          work/karmadatest-vl9zw-6b4995dbfc   Work is being dispatched to member clusters.
14m         Normal    WorkDispatching          work/karmadatest-vlt2j-cd7d4794f    Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-wvwx6-65dbdcbc47   Work is being dispatched to member clusters.
6s          Normal    WorkDispatching          work/karmadatest-zfncq-7bc9d98d85   Work is being dispatched to member clusters.
8s          Normal    WorkDispatching          work/karmadatest-zt954-5c648687bc   Work is being dispatched to member clusters.

[a7i]

/hold until #5317 is merged

[XiShanYongYe-Chang]

Hi @a7i, we can continue this pr.

Apart from the documentation, this should be the last pr. Can you think of any other tasks that need to be done?

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Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.

Project coverage is 28.51%. Comparing base (37488bd) to head (8f707f3).

Files	Patch %	Lines
pkg/controllers/execution/execution_controller.go	44.44%	3 Missing and 2 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5332      +/-   ##
==========================================
- Coverage   28.53%   28.51%   -0.03%     
==========================================
  Files         632      632              
  Lines       43856    43862       +6     
==========================================
- Hits        12515    12506       -9     
- Misses      30443    30451       +8     
- Partials      898      905       +7     

Flag	Coverage Δ
unittests	28.51% <44.44%> (-0.03%)	⬇️

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[a7i]

Hi @a7i, we can continue this pr.

Apart from the documentation, this should be the last pr. Can you think of any other tasks that need to be done?

I would like to add a bit more e2e tests (will try to add more unit tests but requires some setup). I can work on the documentation soon and e2e soon.

Also, I don't know how trivial this would be, but ideally we can have a metric for work status (with tag value for dispatching vs suspend dispatching), unless it's already there.

[a7i]

Just rebased the PR, I ran golangci-lint locally and it applied a couple of minor fixes. Let me know if you want that reverted.

[XiShanYongYe-Chang]

Thanks @a7i

/cc @chaunceyjiang

[XiShanYongYe-Chang]

Also, I don't know how trivial this would be, but ideally we can have a metric for work status (with tag value for dispatching vs suspend dispatching), unless it's already there.

How do you think? @chaunceyjiang @RainbowMango

[RainbowMango]

Also, I don't know how trivial this would be, but ideally we can have a metric for work status (with tag value for dispatching vs suspend dispatching), unless it's already there.

How do you think? @chaunceyjiang @RainbowMango

It is concerning if we are talking about introducing a metric that tells every work status. You know the amount of work object might be huge, if the work name contains in the metric(like by a tag/lable), the metric record would become very large, and always can not be consumed.

[RainbowMango]

/lgtm
/assign @XiShanYongYe-Chang

[XiShanYongYe-Chang]

Thanks~
/lgtm

[XiShanYongYe-Chang]

/hold cancel

[chaunceyjiang]

Thanks~

/approve

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This pull-request has been approved by: chaunceyjiang

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