Initial

.gitignore

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+*.swp
+main
+eks-workshop-sample-app-temp

Dockerfile

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+FROM scratch
+ADD main /
+EXPOSE 8080
+CMD ["/main"]

buildspec.yml

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+---
+version: 0.2
+phases:
+  install:
+    commands:
+      - mkdir bin
+      - curl -sS -o bin/aws-iam-authenticator https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-07-26/bin/linux/amd64/aws-iam-authenticator
+      - curl -sS -o bin/kubectl https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-07-26/bin/linux/amd64/kubectl
+      - chmod +x ./bin/kubectl ./bin/aws-iam-authenticator
+      - export PATH=$PWD/bin:$PATH
+      - apt-get update && apt-get -y install jq golang python3-pip python3-dev && pip3 install --upgrade awscli
+  pre_build:
+      commands:
+        - TAG="$REPOSITORY_NAME.$REPOSITORY_BRANCH.$ENVIRONMENT_NAME.$(date +%Y-%m-%d.%H.%M.%S).$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | head -c 8)"
+        - sed -i 's@CONTAINER_IMAGE@'"$REPOSITORY_URI:$TAG"'@' hello-k8s.yml
+        - $(aws ecr get-login --no-include-email)
+        - export KUBECONFIG=$HOME/.kube/config
+  build:
+    commands:
+      - CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+      - docker build --tag $REPOSITORY_URI:$TAG .
+
+  post_build:
+    commands:
+      - docker push $REPOSITORY_URI:$TAG
+      - CREDENTIALS=$(aws sts assume-role --role-arn $EKS_KUBECTL_ROLE_ARN --role-session-name codebuild-kubectl --duration-seconds 900)
+      - export AWS_ACCESS_KEY_ID="$(echo ${CREDENTIALS} | jq -r '.Credentials.AccessKeyId')"
+      - export AWS_SECRET_ACCESS_KEY="$(echo ${CREDENTIALS} | jq -r '.Credentials.SecretAccessKey')"
+      - export AWS_SESSION_TOKEN="$(echo ${CREDENTIALS} | jq -r '.Credentials.SessionToken')"
+      - export AWS_EXPIRATION=$(echo ${CREDENTIALS} | jq -r '.Credentials.Expiration')
+      - aws eks update-kubeconfig --name $EKS_CLUSTER_NAME
+      - kubectl apply -f hello-k8s.yml
+      - printf '[{"name":"hello-k8s","imageUri":"%s"}]' $REPOSITORY_URI:$TAG > build.json
+artifacts:
+  files: build.json

hello-k8s.yml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: hello-k8s
+spec:
+  type: LoadBalancer
+  ports:
+    - port: 80
+      targetPort: 8080
+  selector:
+    app: hello-k8s
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: hello-k8s
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: hello-k8s
+  template:
+    metadata:
+      labels:
+        app: hello-k8s
+    spec:
+      containers:
+        - name: hello-k8s
+          image: CONTAINER_IMAGE
+          ports:
+            - containerPort: 8080
+

main.go

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+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+
+		f := fib()
+
+		res := &response{Message: "Hello World - now"}
+
+		for _, e := range os.Environ() {
+			pair := strings.Split(e, "=")
+			res.EnvVars = append(res.EnvVars, pair[0]+"="+pair[1])
+		}
+
+		for i := 1; i <= 90; i++ {
+			res.Fib = append(res.Fib, f())
+		}
+
+		// Beautify the JSON output
+		out, _ := json.MarshalIndent(res, "", "  ")
+
+		// Normally this would be application/json, but we don't want to prompt downloads
+		w.Header().Set("Content-Type", "text/plain")
+
+		io.WriteString(w, string(out))
+
+		fmt.Println("Hello world - the log message")
+	})
+	http.ListenAndServe(":8080", nil)
+}
+
+type response struct {
+	Message string   `json:"message"`
+	EnvVars []string `json:"env"`
+	Fib     []int    `json:"fib"`
+}
+
+func fib() func() int {
+	a, b := 0, 1
+	return func() int {
+		a, b = b, a+b
+		return a
+	}
+}