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Routes

Sometimes, you might notice errors when you try to access your services over a route.

  1. Try to send a request to your destination with verbose mode and look for error messages. For example, you might curl the path to your app on the ingress gateway.

    curl -vik https://${INGRESS_GW_IP}:443/ratings/1 -H "Host: www.example.com"

    Example output:

    Message Description Steps to resolve
    Connection reset by peer The destination sent a reset (RST) packet and dropped the connection. No TLS handshake was established. This issue often indicates a TLS issue. Skip to Step 5 to check the virtual gateway configuration for the tls section. Make sure the secret exists with valid credentials.
    Connection refused Your gateway might not be listening on the right port. Skip to Step 5 to verify that the gateway listens on the correct port for the correct host.
    successfully set certificate...SSL_ERROR_SYSCALL in connection Your TLS secrets are set up, but the hostname might not match the hosts in your virtual gateway configuration. For example, the secret might be a wildcard *.example.com, but the virtual gateway configuration specifies only www.example.com. Make sure that the TLS secrets for the gateway are in the same namespace as the ingress gateway. Then, make sure that the hostname that the secret is for matches the hostnames in the virtual gateway configuration.

  2. Verify that your Gloo setup is working correctly.

    1. Check the management server.
    2. Check the agent for the clusters where your resources run.
    3. Make sure that your management server and agent run the same minor version of Gloo. 
      meshctl version --kubecontext ${MGMT_CONTEXT}
meshctl version --kubecontext ${REMOTE_CONTEXT1}
meshctl version --kubecontext ${REMOTE_CONTEXT2}

  3. Verify that your Istio gateway pods are in a Running state.

    kubectl get pods -A --context ${REMOTE_CONTEXT1}

    Example output:

    NAMESPACE      NAME                                     READY   STATUS    RESTARTS   AGE
istio-system   istio-eastwestgateway-6559bbc949-xrfz6   1/1     Running   0          4d14h
istio-system   istio-ingressgateway-64c544cfff-jgnkp    1/1     Running   0          4d16h

    If not, describe the pods, get the logs, and look for error messages.

    kubectl describe pod -n gloo-mesh-gateways --context ${REMOTE_CONTEXT1} -l istio=ingressgateway

    kubectl logs --context ${REMOTE_CONTEXT1} -n gloo-mesh-gateways $(kubectl get pods -l "app=istio-ingressgateway" -n gloo-mesh-gateways -o jsonpath='{.items[].metadata.name}') > logs-ingressgateway.txt

    For example, a filter_chain_not_found message indicates that the request does not have a matching SNI in the gateway. Make sure that the TLS secrets for the gateway are in the same namespace as the ingress gateway. Then, make sure that the hostname that the secret is for matches the hostnames in the virtual gateway configuration.

  4. If you are sending a request directly to the gateway and not to a host, check the service details for the IP address that the gateway is exposed on. Verify that you use this IP address in your request to the route.

    kubectl get svc -n istio-system --context ${REMOTE_CONTEXT1}

    In the following example, the external IP addresses are as follows:

    • istio-eastwestgateway gateway for traffic between cluster or in a service mesh: 35.xxx.xx.x1
    • istio-ingressgateway gateway for traffic from outside the cluster if you use Gloo Gateway with Gloo Mesh Enterprise: 35.xxx.x.xx9
    NAME                    TYPE           CLUSTER-IP      EXTERNAL-IP    PORT(S)                                                      AGE
istio-eastwestgateway   LoadBalancer   10.xxx.x.xx8    35.xxx.xx.x1   15021:30974/TCP,15443:30522/TCP                              5d18h
istio-ingressgateway    LoadBalancer   10.xxx.xx.xx3   35.xxx.x.xx9   15021:31225/TCP,80:30381/TCP,443:31078/TCP,15443:30649/TCP   5d18h

  5. If you are sending the request to a host, check your Gloo virtual gateway resource. Look for the information in the following table.

    kubectl get virtualgateways -A -o yaml --context ${REMOTE_CONTEXT1}

    Example output:

    apiVersion: networking.gloo.solo.io/v2
kind: VirtualGateway
metadata:
  annotations:
    cluster.solo.io/cluster: ""
  name: istio-ingressgateway
  namespace: bookinfo
spec:
  listeners:
  - allowedRouteTables:
    - host: www.example.com
    http: {}
    port:
      number: 443
    tls:
      mode: SIMPLE
      secretName: example-secret
  workloads:
  - selector:
      labels:
        istio: ingressgateway
    Review the following table to understand this configuration.
    Setting Description
    namespace Make sure that the gateway's namespace is in the same workspace as the route's app. Or, the gateway workspace must import the route's app.
    allowedRouteTables Make sure that the host that you call is allowed.
    port Check that the port matches the port that you call. For example, if you sent a request along an https:// URL, but the port is 80 (for HTTP), the request fails.
    tls Check the TLS details. If the gateway listens on port 443 for HTTPS traffic, this section is required.
    workloads Make sure that the virtual gateway selects the gateway workload that you checked earlier.

  6. If you are sending the request to a host, check your Gloo route table resource. Look for the information in the following table.

    kubectl get routetables -A -o yaml --context ${REMOTE_CONTEXT1}

    Example output:

    apiVersion: networking.gloo.solo.io/v2
kind: RouteTable
metadata:
  annotations:
    cluster.solo.io/cluster: ""
  name: www-example-com
  namespace: bookinfo
spec:
  defaultDestination:
    port:
      number: 9080
    ref:
      name: ratings
      namespace: bookinfo
  hosts:
  - www.example.com
  http:
  - forwardTo: {}
    labels:
      "no": auth
    matchers:
    - headers:
      - name: noauth
        value: "true"
    name: ratings-ingress-no-auth
  - forwardTo: {}
    labels:
      route: ratings
    name: ratings-ingress
  virtualGateways:
  - name: istio-ingressgateway
    Review the following table to understand this configuration.
    Setting Description
    namespace Make sure that the route table's namespace is in the same workspace as the route's app. Or, the route table's workspace must import the route's app.
    defaultDestination Make sure that the details for your app are correct, such as the port and reference.
    host Verify that the host you call is included in the route table.
    forwardTo Check the forward to details. For example, the route table might be set up to forward requests with certain headers or labels to a different service.
    virtualGateways Make sure that the route table selects the virtual gateway that you checked earlier.

  7. Check for other Gloo policies that might be applied to the destination or route.

    kubectl get ratelimitserverconfigs,RatelimitConfigs,ratelimitserversettings,ratelimitclientconfigs,ratelimitpolicies,wasmdeploymentpolicies,externalendpoints,externalservices,accesslogpolicies,failoverpolicies,faultinjectionpolicies,outlierdetectionpolicies,jwtpolicies,wafpolicies,retrytimeoutpolicies,accesspolicies,corspolicies,csrfpolicies,extauthpolicies,mirrorpolicies,transformationpolicies,authorizationpolicies,extauthserver,headermanipulationpolicies -A --context ${REMOTE_CONTEXT1}

  8. Check that the underlying Istio resources are working properly. For example, your gateway might be missing a secret.

    istioctl analyze --context ${REMOTE_CONTEXT1} -n istio-system