Updated example to use frontend/backend structure

Author: sshver

examples/README.md

@@ -3,7 +3,7 @@
 ## Prerequisites
 * Install latest [aws-cli](https://docs.aws.amazon.com/cli/latest/userguide/installing.html).
 
-* Build and push the colorteller and gateway images using deploy.sh from within /examples/apps/colorapp/src/
+* Build and push the colorteller and frontend images using deploy.sh from within /examples/apps/colorapp/src/
 * Configure aws-cli to support Appmesh APIs
 
 ```
@@ -20,7 +20,7 @@ export KEY_PAIR_NAME=<key-pair to access ec2 instances where apps are running>
 export ENVOY_IMAGE=<the latest recommended envoy image, see https://docs.aws.amazon.com/app-mesh/latest/userguide/envoy.html>
 export CLUSTER_SIZE=<number of ec2 instances to spin up to join cluster
 export SERVICES_DOMAIN=<domain under which services will be discovered, e.g. "default.svc.cluster.local">
-export COLOR_GATEWAY_IMAGE=<image location for colorapp's gateway, e.g. "<youraccountnumber>.dkr.ecr.amazonaws.com/gateway:latest" - you need to build this image and use your own ECR repository, see below>
+export FRONTEND_IMAGE=<image location for colorapp's frontend, e.g. "<youraccountnumber>.dkr.ecr.amazonaws.com/frontend:latest" - you need to build this image and use your own ECR repository, see below>
 export COLOR_TELLER_IMAGE=<image location for colorapp's teller, e.g. "<youraccountnumber>.dkr.ecr.amazonaws.com/colorteller:latest" - you need to build this image and use your own ECR repository, see below>
 ```
 
@@ -57,14 +57,14 @@ To add new app, create a directory under apps and follow the setup as in colorap
 
 In Elastic Container Registry, created two new repositories:
  - colorteller
- - gateway
+ - frontend
 
 Build the docker images as follow:
 ```
 cd apps/colorapp/src/colorteller/
 ./deploy.sh
 cd -
-cd apps/colorapp/src/gateway
+cd apps/colorapp/src/frontend
 ./deploy.sh
 cd -
 ```

examples/apps/colorapp/README.md

@@ -9,8 +9,8 @@ if [ -z "${ENVOY_IMAGE}" ]; then
     exit 1
 fi
 
-if [ -z "${COLOR_GATEWAY_IMAGE}" ]; then
-    echo "COLOR_GATEWAY_IMAGE environment is not defined"
+if [ -z "${FRONTEND_IMAGE}" ]; then
+    echo "FRONTEND_IMAGE environment is not defined"
     exit 1
 fi
 
@@ -82,26 +82,26 @@ generate_color_teller_task_def() {
     --cli-input-json "$task_def_json")
 }
 
-# Color Gateway Task Definition
-generate_sidecars "colorgateway"
+# Color Frontend Task Definition
+generate_sidecars "frontend"
 task_def_json=$(jq -n \
-    --arg NAME "$ENVIRONMENT_NAME-ColorGateway" \
+    --arg NAME "$ENVIRONMENT_NAME-Frontend" \
     --arg STAGE "$APPMESH_STAGE" \
     --arg COLOR_TELLER_ENDPOINT "colorteller.$SERVICES_DOMAIN:9080" \
     --arg TCP_ECHO_ENDPOINT "tcpecho.$SERVICES_DOMAIN:2701" \
-    --arg APP_IMAGE $COLOR_GATEWAY_IMAGE \
+    --arg APP_IMAGE $FRONTEND_IMAGE \
     --arg AWS_REGION $AWS_DEFAULT_REGION \
     --arg ECS_SERVICE_LOG_GROUP $ecs_service_log_group \
-    --arg AWS_LOG_STREAM_PREFIX_APP "colorgateway-app" \
+    --arg AWS_LOG_STREAM_PREFIX_APP "frontend-app" \
     --arg TASK_ROLE_ARN $task_role_arn \
     --arg EXECUTION_ROLE_ARN $execution_role_arn \
     --argjson ENVOY_CONTAINER_JSON "${envoy_container_json}" \
     --argjson XRAY_CONTAINER_JSON "${xray_container_json}" \
-    -f "${DIR}/colorgateway-base-task-def.json")
+    -f "${DIR}/frontend-base-task-def.json")
 task_def=$(aws --profile "${AWS_PROFILE}" --region "${AWS_DEFAULT_REGION}" \
     ecs register-task-definition \
     --cli-input-json "$task_def_json")
-colorgateway_task_def_arn=($(echo $task_def \
+frontend_task_def_arn=($(echo $task_def \
     | jq -r '.taskDefinition | .taskDefinitionArn'))
 
 # Color Teller White Task Definition

examples/apps/colorapp/ecs/create-task-defs.sh

@@ -20,7 +20,7 @@ aws --profile "${AWS_PROFILE}" --region "${AWS_DEFAULT_REGION}" \
     EnvironmentName="${ENVIRONMENT_NAME}" \
     ECSServicesDomain="${SERVICES_DOMAIN}" \
     AppMeshMeshName="${MESH_NAME}" \
-    ColorGatewayTaskDefinition="${colorgateway_task_def_arn}" \
+    FrontendTaskDefinition="${frontend_task_def_arn}" \
     ColorTellerWhiteTaskDefinition="${colorteller_white_task_def_arn}" \
     ColorTellerRedTaskDefinition="${colorteller_red_task_def_arn}" \
     ColorTellerBlueTaskDefinition="${colorteller_blue_task_def_arn}" \

examples/apps/colorapp/ecs/ecs-colorapp.sh

@@ -12,9 +12,9 @@ Parameters:
     Type: String
     Description: DNS namespace used by services e.g. default.svc.cluster.local
 
-  ColorGatewayTaskDefinition:
+  FrontendTaskDefinition:
     Type: String
-    Description: Task definition for ColorGateway Service
+    Description: Task definition for Frontend Service
 
   ColorTellerWhiteTaskDefinition:
     Type: String
@@ -201,11 +201,11 @@ Resources:
             - 'Fn::ImportValue': !Sub "${EnvironmentName}:PrivateSubnet2"
       TaskDefinition: { Ref: ColorTellerBlackTaskDefinition }
 
-  ### colorgateway.default.svc.cluster.local
-  ColorGatewayServiceDiscoveryRecord:
+  ### frontend.default.svc.cluster.local
+  FrontendServiceDiscoveryRecord:
     Type: 'AWS::ServiceDiscovery::Service'
     Properties:
-      Name: "colorgateway"
+      Name: "frontend"
       DnsConfig:
         NamespaceId:
           'Fn::ImportValue': !Sub "${EnvironmentName}:ECSServiceDiscoveryNamespace"
@@ -215,7 +215,7 @@ Resources:
       HealthCheckCustomConfig:
         FailureThreshold: 1
 
-  ColorGatewayService:
+  FrontendService:
     Type: 'AWS::ECS::Service'
     DependsOn:
       - WebLoadBalancerRule
@@ -229,7 +229,7 @@ Resources:
       LaunchType: EC2
       ServiceRegistries:
         - RegistryArn:
-            'Fn::GetAtt': ColorGatewayServiceDiscoveryRecord.Arn
+            'Fn::GetAtt': FrontendServiceDiscoveryRecord.Arn
       NetworkConfiguration:
         AwsvpcConfiguration:
           AssignPublicIp: DISABLED
@@ -238,7 +238,7 @@ Resources:
           Subnets: 
             - 'Fn::ImportValue': !Sub "${EnvironmentName}:PrivateSubnet1"
             - 'Fn::ImportValue': !Sub "${EnvironmentName}:PrivateSubnet2"
-      TaskDefinition: { Ref: ColorGatewayTaskDefinition }
+      TaskDefinition: { Ref: FrontendTaskDefinition }
       LoadBalancers:
         - ContainerName: app
           ContainerPort: 9080
@@ -275,7 +275,7 @@ Resources:
           Image: "tstrohmeier/alpine-infinite-curl"
           Essential: true
           Command:
-            - !Sub "-h http://colorgateway.${ECSServicesDomain}:9080/color"
+            - !Sub "-h http://frontend.${ECSServicesDomain}:9080/color"
           LogConfiguration:
             LogDriver: "awslogs"
             Options:
@@ -367,7 +367,7 @@ Resources:
           - CidrIp: 0.0.0.0/0
             IpProtocol: -1
 
-  # public ALB for color gateway
+  # public ALB for color frontend
   PublicLoadBalancer:
     Type: AWS::ElasticLoadBalancingV2::LoadBalancer
     Properties:

examples/apps/colorapp/ecs/ecs-colorapp.yaml

@@ -8,35 +8,35 @@ cat << CONFIG_EOF > "${DIR}/colorapp.yaml"
 apiVersion: v1
 kind: Service
 metadata:
-  name: colorgateway
+  name: frontend
   labels:
-    app: colorgateway
+    app: frontend
 spec:
   ports:
   - port: 9080
     name: http
   selector:
-    app: colorgateway
+    app: frontend
 ---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: colorgateway
+  name: frontend
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: colorgateway
+      app: frontend
       version: v1
   template:
     metadata:
       labels:
-        app: colorgateway
+        app: frontend
         version: v1
     spec:
       containers:
-        - name: colorgateway
-          image: "${COLOR_GATEWAY_IMAGE}"
+        - name: frontend
+          image: "${FRONTEND_IMAGE}"
           ports:
             - containerPort: 9080
           env:
@@ -52,7 +52,7 @@ spec:
             runAsUser: 1337
           env:
             - name: "APPMESH_VIRTUAL_NODE_NAME"
-              value: "mesh/${MESH_NAME}/virtualNode/colorgateway-vn"
+              value: "mesh/${MESH_NAME}/virtualNode/frontend-vn"
             - name: "ENVOY_LOG_LEVEL"
               value: "debug"
             - name: "AWS_REGION"
@@ -400,7 +400,7 @@ spec:
           image: "tstrohmeier/alpine-infinite-curl"
           env:
             - name: "HOST"
-              value: "http://colorgateway.${SERVICES_DOMAIN}:9080/color"
+              value: "http://frontend.${SERVICES_DOMAIN}:9080/color"
 ---
 
 # tcpecho

examples/apps/colorapp/ecs/colorgateway-base-task-def.json renamed to examples/apps/colorapp/ecs/frontend-base-task-def.json

@@ -124,12 +124,10 @@ Resources:
         HttpRoute:
           Action:
             WeightedTargets:
-              - VirtualNode: colorteller-white-vn
+              - VirtualNode: colorteller-red-vn
                 Weight: 1
               - VirtualNode: colorteller-blue-vn
                 Weight: 1
-              - VirtualNode: colorteller-red-vn
-                Weight: 1
           Match:
             Prefix: "/"
 
@@ -177,22 +175,22 @@ Resources:
           VirtualNode:
             VirtualNodeName: tcpecho-vn
 
-  ColorGatewayVirtualNode:
+  FrontendVirtualNode:
     Type: AWS::AppMesh::VirtualNode
     DependsOn:
       - ColorTellerVirtualService
       - TcpEchoVirtualService
     Properties:
       MeshName: !Ref AppMeshMeshName
-      VirtualNodeName: colorgateway-vn
+      VirtualNodeName: frontend-vn
       Spec:
         Listeners:
           - PortMapping:
               Port: 9080
               Protocol: http
         ServiceDiscovery:
           DNS:
-            Hostname: !Sub "colorgateway.${ServicesDomain}"
+            Hostname: !Sub "frontend.${ServicesDomain}"
         Backends:
           - VirtualService:
               VirtualServiceName: !Sub "colorteller.${ServicesDomain}"

examples/apps/colorapp/kubernetes/generate-templates.sh

@@ -0,0 +1 @@
+frontend

examples/apps/colorapp/servicemesh/appmesh-colorapp.yaml

@@ -1,6 +1,6 @@
 FROM golang:1-stretch as builder
 ARG GO_PROXY=https://proxy.golang.org
-WORKDIR /go/src/github.com/aws/aws-app-mesh-examples/colorapp/gateway
+WORKDIR /go/src/github.com/aws/aws-app-mesh-examples/colorapp/frontend
 
 # Force the go compiler to use modules.
 ENV GO111MODULE=on
@@ -15,10 +15,10 @@ RUN go env -w GOPROXY=${GO_PROXY}
 RUN go mod download
 
 COPY . .
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /aws-app-mesh-examples-colorapp-gateway .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /aws-app-mesh-examples-colorapp-frontend .
 
 FROM amazonlinux:2
 RUN yum install -y ca-certificates
-COPY --from=builder /aws-app-mesh-examples-colorapp-gateway /bin/aws-app-mesh-examples-colorapp-gateway
+COPY --from=builder /aws-app-mesh-examples-colorapp-frontend /bin/aws-app-mesh-examples-colorapp-frontend
 
-ENTRYPOINT ["/bin/aws-app-mesh-examples-colorapp-gateway"]
+ENTRYPOINT ["/bin/aws-app-mesh-examples-colorapp-frontend"]