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Chapter 5. Connecting to external services

You can connect a router to an external service such as a message broker. The services may be running in the same OpenShift cluster as the router network, or running outside of OpenShift.

Prerequisites

  • You must have access to a message broker.

Procedure

This procedure describes how to connect a router to a broker and configure a link route to connect messaging clients to it.

  1. Start editing the Interconnect Custom Resource YAML file that describes the router deployment that you want to connect to a broker. 

    $ oc edit -f router-mesh.yaml
    Copy to Clipboard Toggle word wrap

  2. In the spec section, configure the connection and link route.

    Sample router-mesh.yaml file

    apiVersion: interconnectedcloud.github.io/v1alpha1
kind: Interconnect
metadata:
  name: router-mesh
spec:
  ...
  connectors:
    1 
    
  - name: my-broker
    host: broker
    port: 5672
    routeContainer: true
  linkRoutes:
    2 
    
  - prefix: q1
    direction: in
    connection: my-broker
  - prefix: q1
    direction: out
    connection: my-broker
    Copy to Clipboard Toggle word wrap

    1
    The connection to be used to connect this router to the message broker. The Operator will configure this connection from every router defined in this router deployment to the broker. If you only want a single connection between the router network and the broker, then configure a listener instead of a connector and have the broker establish the connection.
    2
    The link route configuration. It defines the incoming and outgoing links and connection to be used to connect messaging applications to the message broker.

  3. Verify that the router has established the link route to the message broker. 

    $ oc exec router-mesh-fb6bc5797-crvb6 -it -- qdstat --linkroutes
Link Routes
  address  dir  distrib       status
  ====================================
  q1       in   linkBalanced  active
  q1       out  linkBalanced  active
    Copy to Clipboard Toggle word wrap

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