traffic_routing.yml

---
# Central config stored as config map

apiVersion: v1
kind: ConfigMap
metadata:
  name: central-config-routing
data:
  1_web_defaults.hcl: |
    kind = "service-defaults"
    name = "web"
    protocol = "http"
  2_api_defaults.hcl: |
    kind = "service-defaults"
    name = "api"
    protocol = "http"
  3_api_resolver.hcl: |
    kind = "service-resolver"
    name = "api"

    # https://www.consul.io/api/health.html#filtering-2
    # # Show Node.Meta demonstration showing performance testing a new instance type
    default_subset = "v1"

    subsets = {
      v1 = {
        filter = "Service.Meta.version == 1"
      }
      v2 = {
        filter = "Service.Meta.version == 2"
      }
    }

---
# Job to load central config

apiVersion: batch/v1
kind: Job
metadata:
  name: central-config-routing
  labels:
    app: central-config-routing
spec:
  template:
    spec:
      restartPolicy: Never
      volumes:
      - name: central-config
        configMap:
          name: central-config-routing
      containers:
      - name: central-config-split
        image: "nicholasjackson/consul-envoy:v1.6.1-v0.10.0"
        imagePullPolicy: Always
        env:
        - name: "CONSUL_HTTP_ADDR"
          value: "consul-consul-server:8500"
        - name: "CONSUL_GRPC_ADDR"
          value: "consul-consul-server:8502"
        - name: "CENTRAL_CONFIG_DIR"
          value: "/config"
        volumeMounts:
        - name: "central-config"
          readOnly: true
          mountPath: "/config"

---
# Service to expose web frontend

apiVersion: v1
kind: Service
metadata:
  name: web-service
spec:
  selector:
    app: web
  ports:
  - name: http
    protocol: TCP
    port: 9090
    targetPort: 9090

---
# Web frontend

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-deployment
  labels:
    app: web
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
      annotations:
        "consul.hashicorp.com/connect-inject": "true"
        "consul.hashicorp.com/connect-service-upstreams": "api:9091"
    spec:
      containers:
      - name: web
        image: nicholasjackson/fake-service:v0.7.3
        ports:
        - containerPort: 9090
        env:
        - name: "LISTEN_ADDR"
          value: "0.0.0.0:9090"
        - name: "UPSTREAM_URIS"
          value: "http://localhost:9091"
        - name: "NAME"
          value: "web"
        - name: "MESSAGE"
          value: "Hello World"
        - name: "HTTP_CLIENT_KEEP_ALIVES"
          value: "false"

---
# API service version 2

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-deployment-v1
  labels:
    app: api-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: api-v1
  template:
    metadata:
      labels:
        app: api-v1
      annotations:
        "consul.hashicorp.com/connect-inject": "true"
        "consul.hashicorp.com/service-meta-version": "1"
        "consul.hashicorp.com/service-tags": "v1"
    spec:
      containers:
      - name: api
        image: nicholasjackson/fake-service:v0.7.3
        ports:
        - containerPort: 9090
        env:
        - name: "LISTEN_ADDR"
          value: "0.0.0.0:9090"
        - name: "NAME"
          value: "api-v1"
        - name: "MESSAGE"
          value: "Response from API v1"

---
# API service version 2

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-deployment-v2
  labels:
    app: api-v2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: api-v2
  template:
    metadata:
      labels:
        app: api-v2
      annotations:
        "consul.hashicorp.com/connect-inject": "true"
        "consul.hashicorp.com/service-meta-version": "2"
        "consul.hashicorp.com/service-tags": "v2"
    spec:
      containers:
      - name: api
        image: nicholasjackson/fake-service:v0.7.3
        ports:
        - containerPort: 9090
        env:
        - name: "LISTEN_ADDR"
          value: "0.0.0.0:9090"
        - name: "NAME"
          value: "api-v2"
        - name: "MESSAGE"
          value: "Response from API v2"

---