(feat) classify managed clusters from management-cluster resources#482
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The existing Classifier evaluates rules against resources inside each managed cluster and applies labels based on what it finds there. This works well, but leaves a gap: there is no way to label managed clusters based on resources that live on the management cluster itself. A concrete example is an Internal Developer Platform backed by Crossplane. When a team orders an addon, a Crossplane Composite Resource is created on the management cluster. The platform needs to label the target cluster in response so that Sveltos can deploy the right addons. But sveltos-agent only sees the managed cluster, not the management cluster, so the existing Classifier cannot help here. This PR introduces a new feature to cover that gap. A ManagementClusterClassifier watches resources on the management cluster and runs a Lua function that receives the full set of matched resources and returns which managed clusters should be labeled. Because the evaluation happens entirely on the management cluster, no deployment to managed clusters is needed. A ManagementClusterClassifierReport tracks the label ownership state per classifier/cluster pair, enabling the same conflict detection the existing Classifier provides through the keymanager.
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The existing Classifier evaluates rules against resources inside each managed cluster and applies labels based on what it finds there. This works well, but leaves a gap: there is no way to label managed clusters based on resources that live on the management cluster itself.
A concrete example is an Internal Developer Platform backed by Crossplane. When a team orders an addon, a Crossplane Composite Resource is created on the management cluster. The platform needs to label the target cluster in response so that Sveltos can deploy the right addons. But sveltos-agent only sees the managed cluster, not the management cluster, so the existing Classifier cannot help here.
This PR introduces a new feature to cover that gap. A ManagementClusterClassifier watches resources on the management cluster and runs a Lua function that receives the full set of matched resources and returns which managed clusters should be labeled. Because the evaluation happens entirely on the management cluster, no deployment to managed clusters is needed.
A ManagementClusterClassifierReport tracks the label ownership state per classifier/cluster pair, enabling the same conflict detection the existing Classifier provides through the keymanager.
Fixes #375