Enable Jaeger tracing for go services (#5)

Go services are instrumented with jaeger already. Send traces to an agent running on the host.

kubernetes-manifests/adservice.yaml

@@ -40,12 +40,13 @@ spec:
         env:
         - name: PORT
           value: "9555"
-        # - name: DISABLE_STATS
+        - name: NODE_NAME
-        #   value: "1"
+          valueFrom:
-        # - name: DISABLE_TRACING
+            fieldRef:
-        #   value: "1"
+              apiVersion: v1
-        #- name: JAEGER_SERVICE_ADDR
+              fieldPath: spec.nodeName
-        #  value: "jaeger-collector:14268"
+        - name: JAEGER_SERVICE_ADDR
+          value: "$(NODE_NAME):14268"
         resources:
           requests:
             cpu: 200m

kubernetes-manifests/checkoutservice.yaml

@@ -57,14 +57,13 @@ spec:
             value: "currencyservice:7000"
           - name: CART_SERVICE_ADDR
             value: "cartservice:7070"
-          # - name: DISABLE_STATS
+          - name: NODE_NAME
-          #   value: "1"
+            valueFrom:
-          # - name: DISABLE_TRACING
+              fieldRef:
-          #   value: "1"
+                apiVersion: v1
-          # - name: DISABLE_PROFILER
+                fieldPath: spec.nodeName
-          #   value: "1"
+          - name: JAEGER_SERVICE_ADDR
-          # - name: JAEGER_SERVICE_ADDR
+            value: "$(NODE_NAME):14268"
-          #   value: "jaeger-collector:14268"
           resources:
             requests:
               cpu: 100m

kubernetes-manifests/frontend.yaml

@@ -73,12 +73,13 @@ spec:
             value: "adservice:9555"
           - name: ENV_PLATFORM
             value: "gcp"
-          # - name: DISABLE_TRACING
+          - name: NODE_NAME
-          #   value: "1"
+            valueFrom:
-          # - name: DISABLE_PROFILER
+              fieldRef:
-          #   value: "1"
+                apiVersion: v1
-          # - name: JAEGER_SERVICE_ADDR
+                fieldPath: spec.nodeName
-          #   value: "jaeger-collector:14268"
+          - name: JAEGER_SERVICE_ADDR
+            value: "$(NODE_NAME):14268"
           resources:
             requests:
               cpu: 100m

kubernetes-manifests/productcatalogservice.yaml

@@ -40,14 +40,13 @@ spec:
         env:
         - name: PORT
           value: "3550"
-        # - name: DISABLE_STATS
+        - name: NODE_NAME
-        #   value: "1"
+          valueFrom:
-        # - name: DISABLE_TRACING
+            fieldRef:
-        #   value: "1"
+              apiVersion: v1
-        # - name: DISABLE_PROFILER
+              fieldPath: spec.nodeName
-        #   value: "1"
+        - name: JAEGER_SERVICE_ADDR
-        # - name: JAEGER_SERVICE_ADDR
+          value: "$(NODE_NAME):14268"
-        #   value: "jaeger-collector:14268"
         readinessProbe:
           exec:
             command: ["/bin/grpc_health_probe", "-addr=:3550"]

kubernetes-manifests/shippingservice.yaml

@@ -39,14 +39,13 @@ spec:
         env:
         - name: PORT
           value: "50051"
-        # - name: DISABLE_STATS
+        - name: NODE_NAME
-        #   value: "1"
+          valueFrom:
-        # - name: DISABLE_TRACING
+            fieldRef:
-        #   value: "1"
+              apiVersion: v1
-        # - name: DISABLE_PROFILER
+              fieldPath: spec.nodeName
-        #   value: "1"
+        - name: JAEGER_SERVICE_ADDR
-        # - name: JAEGER_SERVICE_ADDR
+          value: "$(NODE_NAME):14268"
-        #   value: "jaeger-collector:14268"
         readinessProbe:
           periodSeconds: 5
           exec: