🐛 Ensure one cma is processed by one addon worker at the same time

[zhujian7]

Summary

Currently, there are 2 workers started for the addonConfigurationController, and this controller watches the ManagedClusterAddOn resource, when mca changes, it enqueues the managedClusterAddon namespace and name in the format "{namespace}/{name}", but in the sync func, it only uses the name to get clusterManagementAddOn.

Think about the case, there is an addon named addon1, and we created 2 managedClusterAddon, one is in the cluster1 namespace, and the other one is in the cluster2 namespace, so there will be 2 keys enqueued, cluster1/addon1 and cluster2/addon1, because these 2 keys are not the same, the k8s cache queue will not merge them to one, so 2 workers will process these 2 keys at the same time. But finally, these 2 workers will get the same clusterManagementAddon addon1 simultaneously. This may cause some race condition problems.

This PR changes the enqueue rule for the managedClusterAddon resources only to enqueue the name. so cluster1/addon1 and cluster2/addon1 changing will result in only enqueue one key addon1, only one worker will be assigned to process it.

Related issue(s)

#651

Fixes #

[zhujian7]

this is the key point of this PR. mca changes, only enqueue the name.

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 64.13%. Comparing base (33b409d) to head (86b605b).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...addon/controllers/addonconfiguration/controller.go	0.00%	3 Missing ⚠️
...kg/addon/controllers/addonmanagement/controller.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #654      +/-   ##
==========================================
+ Coverage   64.10%   64.13%   +0.03%     
==========================================
  Files         182      182              
  Lines       14277    14268       -9     
==========================================
- Hits         9152     9151       -1     
+ Misses       4213     4206       -7     
+ Partials      912      911       -1     

Flag	Coverage Δ
unit	64.13% <20.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zhujian7]

/assign @qiujian16 @haoqing0110

[qiujian16]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiujian16, zhujian7

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/addon/OWNERS [qiujian16,zhujian7]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment