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Aleksei Sviridkin
8bffa34b54
## What this PR does Adds `networking.encryption.enabled` to the platform chart — a single operator-facing opt-in, off by default, that turns on in-cluster (east-west) transport encryption for the active datapath. When enabled, pod-to-pod traffic across nodes is encrypted at the network layer regardless of whether the workload implements TLS: defense-in-depth for the whole mesh without per-application changes. The default `isp-full` bundle selects the `kubeovn-cilium` datapath (and `isp-full-generic` selects `kubeovn-cilium-generic`), where KubeOVN owns the datapath and the overlay is a Geneve tunnel. The toggle therefore maps to KubeOVN's overlay IPsec (`kube-ovn` `ENABLE_OVN_IPSEC`). KubeOVN's own controller provisions the IPsec CA and per-node certificates through the Kubernetes CSR API, so no cert-manager wiring is needed. This complements, and does not replace, application-level / end-to-end TLS: in-cluster encryption never reaches an external client and gives a tenant no verifiable endpoint certificate. The values comments document the per-datapath scope — including that Kilo's WireGuard mesh (`meshGranularity: location`) covers only cross-location traffic and leaves the intra-location gap this toggle targets, and that the Cilium-native WireGuard/IPsec path on the `cilium` / `cilium-generic` variants is not reached because the system bundle does not select those variants — plus the MTU/throughput overhead. Scope: only the default KubeOVN datapath is wired through the platform toggle, which is what the system bundle actually selects. Wiring the Cilium-native path would require the bundle to expose cilium-only variant selection; that is out of scope here and called out in the values comments. Validation: `helm unittest` on the platform chart passes (66 tests, 7 new) covering on / off / absent / null and verifying the IPsec flag deep-merges without dropping the existing `kube-ovn` overrides, for both `isp-full` and `isp-full-generic`. Closes #2977 Part of #2811 ### Screenshots N/A — no UI changes. ### Release note ```release-note feat(platform): add opt-in `networking.encryption.enabled` (off by default) that enables in-cluster east-west transport encryption for the default KubeOVN datapath via overlay IPsec; complements, and does not replace, application-level TLS. ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Introduced opt-in in-cluster network encryption using KubeOVN IPsec for east-west traffic protection. * Added `networking.encryption` configuration toggle (disabled by default) with full backward compatibility. * **Tests** * Added comprehensive test coverage for network encryption configurations across system variants and edge cases. <!-- end of auto-generated comment: release notes by coderabbit.ai -->