rock
6a66e2752f
Standard K8s NetworkPolicy ipBlock rules don't work under Cilium for the API server — the except clause on 192.168.1.0/24 blocks the post-DNAT destination even when a separate rule re-allows the subnet. Cilium's native kube-apiserver entity tracks API server endpoints regardless of ClusterIP vs node-IP routing. Replaces: ipBlock 192.168.1.0/24:6443 (broken under Cilium) With: CiliumNetworkPolicy toEntities: kube-apiserver (works)
26 lines
807 B
YAML
26 lines
807 B
YAML
# CiliumNetworkPolicy for kube-apiserver access.
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#
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# Standard K8s NetworkPolicy ipBlock rules don't work for the API server
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# under Cilium — the except clause on 192.168.1.0/24 blocks the post-DNAT
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# destination even when a separate rule re-allows a /32 or subnet.
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#
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# Cilium's native `kube-apiserver` entity resolves this correctly: it
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# tracks the API server endpoints regardless of ClusterIP vs node-IP
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# routing, so the policy stays valid across node changes and NAT paths.
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apiVersion: cilium.io/v2
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kind: CiliumNetworkPolicy
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metadata:
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name: {{ .Release.Name }}-apiserver
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namespace: {{ .Release.Namespace }}
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spec:
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endpointSelector:
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matchLabels:
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app: {{ .Release.Name }}
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egress:
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- toEntities:
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- kube-apiserver
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toPorts:
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- ports:
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- port: "6443"
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protocol: TCP
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