strip binaries and move to scratch for base image

Dockerfile

 #
 # build container
 #
-FROM golang:1.10
+FROM golang:1-alpine
 WORKDIR /go/src/github.com/oliver006/redis_exporter/
 ADD main.go /go/src/github.com/oliver006/redis_exporter/
@@ -15,7 +15,9 @@ ENV TAG=$TAG
 ARG DATE
 ENV DATE=$DATE
-RUN CGO_ENABLED=0 GOOS=linux go build -ldflags  " -X main.VERSION=$TAG -X main.COMMIT_SHA1=$SHA1 -X main.BUILD_DATE=$DATE " -a -installsuffix cgo -o redis_exporter .
+RUN apk --no-cache add ca-certificates
+RUN CGO_ENABLED=0 GOOS=linux go build -o /redis_exporter \
+    -ldflags  "-s -w -extldflags \"-static\" -X main.VERSION=$TAG -X main.COMMIT_SHA1=$SHA1 -X main.BUILD_DATE=$DATE" .
@@ -23,10 +25,10 @@ RUN CGO_ENABLED=0 GOOS=linux go build -ldflags  " -X main.VERSION=$TAG -X main.C
 #
 # release container
 #
-FROM alpine:latest
-RUN apk --no-cache add ca-certificates
-WORKDIR /bin/
-COPY --from=0 /go/src/github.com/oliver006/redis_exporter/ .
+FROM scratch
+
+COPY --from=0 /redis_exporter /redis_exporter
+COPY --from=0 /etc/ssl/certs /etc/ssl/certs
 EXPOSE     9121
-ENTRYPOINT [ "/bin/redis_exporter" ]
+ENTRYPOINT [ "/redis_exporter" ]

build.sh

@@ -29,7 +29,7 @@ docker push     "oliver006/redis_exporter:latest"
 echo "Building binaries for Github"
 echo ""
 export CGO_ENABLED=0
-export GO_LDFLAGS="-extldflags \"-static\" -X main.VERSION=$CIRCLE_TAG -X main.COMMIT_SHA1=$CIRCLE_SHA1 -X main.BUILD_DATE=$(date +%F-%T)"
+export GO_LDFLAGS="-s -w -extldflags \"-static\" -X main.VERSION=$CIRCLE_TAG -X main.COMMIT_SHA1=$CIRCLE_SHA1 -X main.BUILD_DATE=$(date +%F-%T)"
 echo  "GO_LDFLAGS: $GO_LDFLAGS"
 go get github.com/mitchellh/gox