Trace policy by identity

Explain allow/deny verdict between two security identities; debug NetworkPolicy drops

cilium-dbg policy trace --src-identity <id> --dst-identity <id> --dport <port>
tool
cilium23 commands
tags
ciliumsecuritydebugk8s

More cilium commands

  • Verbose agent health
    cilium status --verbose

    Full per-node health: datapath mode, IPAM, BPF maps, controllers; first stop on issues

  • Observe TCP egress to FQDN
    hubble observe --protocol tcp --from-pod <ns>/<pod> --to-fqdn '*.example.com'

    Live L3/L7 flows from a pod to a DNS name; validate FQDN-based egress policy

  • ClusterMesh status
    cilium clustermesh status --wait

    Check cross-cluster connectivity and remote endpoint/identity sync health

  • BPF NAT table
    cilium-dbg bpf nat list | head

    List BPF masquerade/NAT entries; debug SNAT port exhaustion or egress source IP

  • Cilium status
    cilium status --wait

    Check health of all Cilium components; wait until ready

all 23 cilium commands