Deploying a demo application

Sample microservices for the web and api deployments are maintained at https://github.com/servicemeshbook/hello-echo the main.go is the web microservice, that calls the upstream API microservice through the use of the UPSTREAM_SERVICE environment variable.

Review the pod and service definition in the 11-web-deployment.yaml script:

...
  template:
    metadata:
      labels:
        app: web
      annotations:
        "consul.hashicorp.com/connect-inject": "true"
        "consul.hashicorp.com/connect-service-upstreams": "api:8081"
...
        env:
...
        - name: UPSTREAM_SERVICE
          value: "http://localhost:8081"

Note the consul.hashicorp.com/connect-service-upstreams annotation in the preceding definition, which points to the Consul service-defaults primitive api with the http protocol using port 8081...