Some services, such as Istio and Envoy's Secret Discovery Service (SDS), take advantage of a new feature in Kubernetes 1.12+, Service Account Token Volume Projection.
- In order to enable this feature for Kubernetes 1.12+, add the following config to your cluster spec:
kubeAPIServer:
apiAudiences:
- api
- istio-ca
serviceAccountIssuer: kubernetes.default.svc
serviceAccountKeyFile:
- /srv/kubernetes/server.key
serviceAccountSigningKeyFile: /srv/kubernetes/server.key