Merge pull request #46 from keptn-contrib/patch/dockerfile

updated Dockerfile to enable Dynatrace monitoring

Dockerfile

@@ -2,14 +2,16 @@
 # Use the offical Golang image to create a build artifact.
 # This is based on Debian and sets the GOPATH to /go.
 # https://hub.docker.com/_/golang
-FROM golang:1.12 as builder
+FROM golang:1.12.13-alpine as builder
 
 WORKDIR /go/src/github.com/keptn-contrib/servicenow-service
 
 ENV GO111MODULE=on
 ENV GOPROXY=https://proxy.golang.org
 ENV BUILDFLAGS=""
 
+RUN apk add --no-cache gcc libc-dev git
+
 # Copy `go.mod` for definitions and `go.sum` to invalidate the next layer
 # in case of a change in the dependencies
 COPY go.mod go.sum ./
@@ -27,17 +29,12 @@ COPY . .
 
 # Build the command inside the container.
 # (You may fetch or manage dependencies here, either manually or with a tool like "godep".)
-RUN CGO_ENABLED=0 GOOS=linux go build $BUILDFLAGS -v -o servicenow-service ./cmd/
+RUN GOOS=linux go build -ldflags '-linkmode=external' $BUILDFLAGS -v -o servicenow-service ./cmd/
 
 # Use a Docker multi-stage build to create a lean production image.
 # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
-FROM alpine:3.7
-RUN apk add --no-cache ca-certificates
-
-ARG debugBuild
-
-# IF we are debugging, we need to install libc6-compat for delve to work on alpine based containers
-RUN if [ ! -z "$debugBuild" ]; then apk add --no-cache libc6-compat; fi
+FROM alpine:3.11
+RUN apk add --no-cache ca-certificates libc6-compat
 
 # Copy the binary to the production image from the builder stage.
 COPY --from=builder /go/src/github.com/keptn-contrib/servicenow-service/servicenow-service /servicenow-service
@@ -52,4 +49,4 @@ ENV GOTRACEBACK=all
 #travis-uncomment COPY entrypoint.sh /
 #travis-uncomment ENTRYPOINT ["/entrypoint.sh"]
 
-CMD ["/servicenow-service"]
+CMD ["/servicenow-service"]

skaffold.yaml

@@ -0,0 +1,13 @@
+apiVersion: skaffold/v1beta13
+kind: Config
+build:
+  artifacts:
+    - image: keptncontrib/servicenow-service
+      docker:    # 	beta describes an artifact built from a Dockerfile.
+        dockerfile: Dockerfile
+        buildArgs:
+          debugBuild: true
+deploy:
+  kubectl:
+    manifests:
+      - deploy/service.yaml