[sig-cloud-provider] Hybrid cloud native support.
sergelogvinov opened this issue · 4 comments
What would you like to be added?
CLI global flag --hybrid-cloud=true
Why is this needed?
It's possible to run multiple CCMs in one cluster, but it requires a deep understanding of how the cloud provider works. In some cases, we need to add a few checks or extra logic on the CCM side.
The node-controller functions properly; only one CCM can find and initialize the node, while others skip it with an error or log message.
With the node-lifecycle-controller, we need to incorporate more checks into each CCM because we cannot determine if an instance exists or not. For instance, Azure-CCM always responds that the instance exists and is not switched off if the ProviderID is not Azure. The CCM responsible for this cloud can make the correct decision. I believe these checks are better made on the cloud provider side.
When a CCM starts, it registers the name of the cloud using 'cloudprovider.RegisterCloudProvider'. This name usually exists in the ProviderID cloud-provider-name://. For example, we can add the CLI global flag --hybrid-cloud=true, which will use this name from RegisterCloudProvider to check the prefix in the ProviderID. If it does not match, the functions InstanceExists and InstanceShutdown will not be called.
/sig cloud-provider
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I would like to work on it . Can you please assign me this issue .
I would like to work on it . Can you please assign me this issue .
Thank you @aryasoni98, but we need to wait triage first. I am not core developer, i cannot say is it fit or not.