Chapter 8. Override your Gateway policies for auth and rate limiting

Procedure

1. Ensure that your Connectivity Link system namespace is set correctly as follows:

   export KUADRANT_SYSTEM_NS=$(kubectl get kuadrant -A -o jsonpath="{.items[0].metadata.namespace}")

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2. Define API keys for bob and alice users as follows:

   kubectl apply -f - <<EOF
   apiVersion: v1
   kind: Secret
   metadata:
     name: bob-key
     namespace: ${KUADRANT_SYSTEM_NS}
     labels:
       authorino.kuadrant.io/managed-by: authorino
       app: toystore
     annotations:
       secret.kuadrant.io/user-id: bob
   stringData:
     api_key: IAMBOB
   type: Opaque
   ---
   apiVersion: v1
   kind: Secret
   metadata:
     name: alice-key
     namespace: ${KUADRANT_SYSTEM_NS}
     labels:
       authorino.kuadrant.io/managed-by: authorino
       app: toystore
     annotations:
       secret.kuadrant.io/user-id: alice
   stringData:
     api_key: IAMALICE
   type: Opaque
   EOF

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3. Create a new AuthPolicy in a different namespace that overrides the deny-all policy created earlier and accepts the API keys as follows:

   kubectl apply -f - <<EOF
   apiVersion: kuadrant.io/v1
   kind: AuthPolicy
   metadata:
     name: toystore-auth
     namespace: ${KUADRANT_DEVELOPER_NS}
   spec:
     targetRef:
       group: gateway.networking.k8s.io
       kind: HTTPRoute
       name: toystore
     defaults:
      when:
        - predicate: "request.path != '/health'"
      rules:
       authentication:
         "api-key-users":
           apiKey:
             selector:
               matchLabels:
                 app: toystore
           credentials:
             authorizationHeader:
               prefix: APIKEY
       response:
         success:
           filters:
             "identity":
               json:
                 properties:
                   "userid":
                     selector: auth.identity.metadata.annotations.secret\.kuadrant\.io/user-id
   EOF

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Procedure

1. Create a new RateLimitPolicy in a different namespace to override the default low-limit policy created previously and set rate limits for specific users as follows:

   kubectl apply -f - <<EOF
   apiVersion: kuadrant.io/v1
   kind: RateLimitPolicy
   metadata:
     name: toystore-rlp
     namespace: ${KUADRANT_DEVELOPER_NS}
   spec:
     targetRef:
       group: gateway.networking.k8s.io
       kind: HTTPRoute
       name: toystore
     limits:
       "general-user":
         rates:
   
         - limit: 5
           window: 10s
         counters:
         - expression: auth.identity.userid
         when:
         - predicate: "auth.identity.userid != 'bob'"
       "bob-limit":
         rates:
         - limit: 2
           window: 10s
         when:
         - predicate: "auth.identity.userid == 'bob'"
   EOF

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   Note

   It might take a few minutes for the RateLimitPolicy to be applied, depending on your cluster.

2. Check that the RateLimitPolicy has a status of Accepted and Enforced as follows:

   kubectl get ratelimitpolicy -n ${KUADRANT_DEVELOPER_NS} toystore-rlp -o=jsonpath='{.status.conditions[?(@.type=="Accepted")].message}{"\n"}{.status.conditions[?(@.type=="Enforced")].message}'

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3. Check that the status of the HTTPRoute is now affected by the RateLimitPolicy in the same namespace:

   kubectl get httproute toystore -n ${KUADRANT_DEVELOPER_NS} -o=jsonpath='{.status.parents[0].conditions[?(@.type=="kuadrant.io/RateLimitPolicyAffected")].message}'

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1. Send requests as user alice as follows:

   while :; do curl -k --write-out '%{http_code}\n' --silent --output /dev/null -H 'Authorization: APIKEY IAMALICE' "https://api.$KUADRANT_ZONE_ROOT_DOMAIN/cars" | grep -E --color "\b(429)\b|$"; sleep 1; done

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   You should see HTTP status 200 every second for 5 seconds, followed by HTTP status 429 every second for 5 seconds.

2. Send requests as user bob as follows:

   while :; do curl -k --write-out '%{http_code}\n' --silent --output /dev/null -H 'Authorization: APIKEY IAMBOB' "https://api.$KUADRANT_ZONE_ROOT_DOMAIN/cars" | grep -E --color "\b(429)\b|$"; sleep 1; done

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   You should see HTTP status 200 every second for 2 seconds, followed by HTTP status 429 every second for 8 seconds.