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This repo has YAML files for getting a SPIRE install into a Kubernetes cluster, ready to be used for working on Cilium mTLS.

It's based on the SPIRE Kubernetes install instructions, with the following changes:

  • Swaps the Service Account Token Server Node attestor plugin and Agent Node and Workload attestor plugin for the Projected Service Account Token Server Node attestor plugin and the PSAT Agent Node and Workload attestor plugins. The PSAT versions are a little better security wise, but require a dedicated volume to project the service account token into the pod.
  • Changes the socket mounting options for everything to match up.
  • Sets the trust domain to spiffe.cilium.io.
  • Adds a fake agent deployment using delegated-client that exercises the SPIFFE DelegatedIdentity API.

Some SPIRE server commands that may prove helpful:

  kubectl exec -n spire spire-server-0 -- \
      /opt/spire/bin/spire-server entry create \
      -spiffeID spiffe://spiffe.cilium.io/cilium-agent \
      -parentID spiffe://spiffe.cilium.io/ns/spire/sa/spire-agent \
      -selector k8s:ns:default \
      -selector k8s:sa:test-client
  
  kubectl exec -n spire spire-server-0 -- \
      /opt/spire/bin/spire-server entry create \
      -spiffeID spiffe://spiffe.cilium.io/dclient \
      -parentID spiffe://spiffe.cilium.io/ns/spire/sa/spire-agent \
      -selector k8s:ns:default \
      -selector k8s:sa:fakeagent
      
  kubectl exec -n spire spire-server-0 -- \
      /opt/spire/bin/spire-server entry create \
      -spiffeID spiffe://spiffe.cilium.io/sclient \
      -parentID spiffe://spiffe.cilium.io/dclient \
      -selector k8s:ns:default \
      -selector k8s:label:k8s-app:sclient
  
  kubectl exec -n spire spire-server-0 -- \
      /opt/spire/bin/spire-server entry create \
      -spiffeID spiffe://spiffe.cilium.io/sclient2\
      -parentID spiffe://spiffe.cilium.io/dclient \
      -selector k8s:ns:default \
      -selector k8s:label:k8s-app:sclient2

# Get the list of entries from the SPIRE server:
kubectl exec -n spire spire-server-0 -- \
      /opt/spire/bin/spire-server entry show