deploy-consumer-service.md

Deploy the Consumer Service

The consumer service is designed to test the Envoy DaemonSet and Kubernetes Envoy Service Discovery Service by making HTTP request through a local Envoy proxy.

Create an Nginx Deployment

The consumer service will attempt to contact the nginx.default.svc.cluster.local service through a local Envoy proxy.

Create a nginx deployment:

kubectl run nginx --image=nginx:1.13 --replicas=3 --port 80

Create a nginx service:

kubectl expose deployment nginx 

Deploy the Consumer Service

kubectl apply -f deployments/consumer.yaml

Review the consumer service logs

kubectl logs -f \
  $(kubectl get pods \
      -l app=consumer \
      -o jsonpath='{.items[0].metadata.name}')

The consumer is able to communicate with the local Envoy proxy by referencing the host IP address at runtime as shown below:

spec:
  containers:
    - name: consumer
      image: gcr.io/hightowerlabs/consumer:0.0.1
      env:
        - name: HOST_IP
          valueFrom:
            fieldRef:
              fieldPath: status.hostIP
      args:
        - "-proxy=http://$(HOST_IP):80"