2.13.2.3. Restrict access with JSON Web Token

You can restrict what can access your mesh with a JSON Web Token (JWT). After authentication, a user or service can access routes, services that are associated with that token.

Create a RequestAuthentication resource, which defines the authentication methods that are supported by a workload. The following example accepts a JWT issued by http://localhost:8080/auth/realms/master.

apiVersion: "security.istio.io/v1beta1"
kind: "RequestAuthentication"
metadata:
  name: "jwt-example"
  namespace: bookinfo
spec:
  selector:
    matchLabels:
      app: httpbin
  jwtRules:
  - issuer: "http://localhost:8080/auth/realms/master"
    jwksUri: "http://keycloak.default.svc:8080/auth/realms/master/protocol/openid-connect/certs"

Then, create an AuthorizationPolicy resource in the same namespace to work with RequestAuthentication resource you created. The following example requires a JWT to be present in the Authorization header when sending a request to httpbin workloads.

apiVersion: "security.istio.io/v1beta1"
kind: "AuthorizationPolicy"
metadata:
  name: "frontend-ingress"
  namespace: bookinfo
spec:
  selector:
    matchLabels:
      app: httpbin
  action: DENY
  rules:
  - from:
    - source:
        notRequestPrincipals: ["*"]