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Description
Feature Description
For advanced deployment scenarios of kcp, a so called cache server is required. Cache servers store a subset of resources integral to a kcp installation's cross-shard communication. Usually this is embedded in the root shard, but we should support deploying a dedicated entity.
kcp ships a standalone cache-server binary.
Proposed Solution
The CacheServer reconciler has to be implemented to deploy a cache-server instance (what exactly this looks like is a bit unclear as of writing this). In addition, existing APIs and reconcilers likely need to be adjusted so that RootShard and Shard objects can optionally reference a CacheServer object.
If that is the case, the RootShard should also not run the embedded cache-server instance.
Alternative Solutions
No response
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Additional Context
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