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I'm not sure I disagree, but pull vs push with the same ACL rules in place is the same outcome. A secure Kubernetes configuration would also not be able to schedule from a worker. Partition of secrets is important, but anyone able to trigger node compromise still sees secrets and workloads anywhere they can schedule.

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At a design level, push removes an entire class of vulnerabilities, full stop. Pull requires good ACL'ing and properly implemented controls for the lifetime of the orchestration system's implementation. Pull makes the system vulnerable to both misconfiguration and incorrect ACL code implementation. Pull is clearly inferior.

Being able to trigger node compromise should have nothing to do with being able to schedule.

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