Merge pull request #217 from mdawar/alpine

Add Alpine Docker image

Dockerfile

 #
 # build container
 #
-FROM golang:1-alpine
+FROM golang:1-alpine as builder
 WORKDIR /go/src/github.com/oliver006/redis_exporter/
 ADD main.go /go/src/github.com/oliver006/redis_exporter/
@@ -20,15 +20,25 @@ 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" .
+#
+# Alpine release container
+#
+FROM alpine as alpine
+
+COPY --from=builder /redis_exporter /redis_exporter
+COPY --from=builder /etc/ssl/certs /etc/ssl/certs
+
+EXPOSE     9121
+ENTRYPOINT [ "/redis_exporter" ]
 #
 # release container
 #
-FROM scratch
-COPY --from=0 /redis_exporter /redis_exporter
-COPY --from=0 /etc/ssl/certs /etc/ssl/certs
+FROM scratch as scratch
+COPY --from=builder /redis_exporter /redis_exporter
+COPY --from=builder /etc/ssl/certs /etc/ssl/certs
 EXPOSE     9121
 ENTRYPOINT [ "/redis_exporter" ]

build.sh

@@ -12,18 +12,31 @@ echo "docker login done"
 export BUILD_ARGS="--rm=false --build-arg TAG=${CIRCLE_TAG} --build-arg SHA1=${CIRCLE_SHA1} --build-arg DATE=$(date +%F-%T)"
 echo  "BUILD_ARGS: $BUILD_ARGS"
-docker build -t "21zoo/redis_exporter:$CIRCLE_TAG" $BUILD_ARGS .
-docker push     "21zoo/redis_exporter:$CIRCLE_TAG"
-
-docker build -t "21zoo/redis_exporter:latest" $BUILD_ARGS .
-docker push     "21zoo/redis_exporter:latest"
-
-docker build -t "oliver006/redis_exporter:$CIRCLE_TAG" $BUILD_ARGS  .
-docker push     "oliver006/redis_exporter:$CIRCLE_TAG"
-
-docker build -t "oliver006/redis_exporter:latest" $BUILD_ARGS  .
-docker push     "oliver006/redis_exporter:latest"
-
+# Scratch image
+docker build --target scratch \
+             -t "21zoo/redis_exporter:$CIRCLE_TAG" \
+             -t "21zoo/redis_exporter:latest" \
+             -t "oliver006/redis_exporter:$CIRCLE_TAG" \
+             -t "oliver006/redis_exporter:latest" \
+            $BUILD_ARGS .
+
+docker push "21zoo/redis_exporter:$CIRCLE_TAG"
+docker push "21zoo/redis_exporter:latest"
+docker push "oliver006/redis_exporter:$CIRCLE_TAG"
+docker push "oliver006/redis_exporter:latest"
+
+# Alpine image
+docker build --target alpine \
+             -t "21zoo/redis_exporter:$CIRCLE_TAG-alpine" \
+             -t "21zoo/redis_exporter:alpine" \
+             -t "oliver006/redis_exporter:$CIRCLE_TAG-alpine" \
+             -t "oliver006/redis_exporter:alpine" \
+            $BUILD_ARGS .
+
+docker push "21zoo/redis_exporter:$CIRCLE_TAG-alpine"
+docker push "21zoo/redis_exporter:alpine"
+docker push "oliver006/redis_exporter:$CIRCLE_TAG-alpine"
+docker push "oliver006/redis_exporter:alpine"
 echo "Building binaries for Github"