runtime: allow CNI host-to-pod traffic - #116
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Set the KatlOS Kubernetes runtime's all/default IPv4 reverse-path filtering policy to zero so dynamically created CNI interfaces do not inherit Fedora's loose filtering mode. This keeps immutable /etc from preventing Cilium's expected host-to-pod and pod-to-underlay paths, with image-content and booted-node assertions covering the contract.
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What changed
Set KatlOS's native IPv4 reverse-path filtering defaults to zero so dynamically created CNI interfaces inherit a compatible value. Add image-content and booted-node coverage for the runtime contract.
Why
Cilium's sysctl helper cannot write its persistent override under KatlOS's immutable
/etc, so Fedora'srp_filter=2default was inherited bylxc*interfaces. Cilium endpoints appeared ready, but host-to-local-pod and pod-to-host or underlay traffic timed out. Applying the new values live immediately restored Cilium health.The three-control-plane VM gate passes with the effective sysctl assertion on every node.