From 6236ace439c27d20a219cc862fb21d8d45ae8f68 Mon Sep 17 00:00:00 2001
From: Vincent Composieux <vincent@composieux.fr>
Date: Sat, 15 Jun 2019 02:06:08 +0200
Subject: [PATCH] Added upx to shrink docker image to ~2MB

---
 .travis.yml | 2 +-
 Dockerfile  | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 22aff2b..fc3eb62 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,7 +21,7 @@ install:
 
 script:
   - go test -v -race ./...
-  - if [ "${LATEST}" = "true" ]; then gox -os="linux darwin windows" -arch="386 amd64" -osarch="linux/arm" -output="pihole_exporter-{{.OS}}-{{.Arch}}"  -verbose ./...; fi
+  - if [ "${LATEST}" = "true" ]; then gox -ldflags "-s -w" -os="linux darwin windows" -arch="386 amd64" -osarch="linux/arm" -output="pihole_exporter-{{.OS}}-{{.Arch}}"  -verbose ./...; fi
 
 deploy:
   provider: releases
diff --git a/Dockerfile b/Dockerfile
index c6d6d88..57aff4f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,17 +4,18 @@ WORKDIR /go/src/github.com/eko/pihole-exporter
 COPY . .
 
 RUN apk update && \
-    apk --no-cache add git alpine-sdk
+    apk --no-cache add git alpine-sdk upx
 
 RUN GO111MODULE=on go mod vendor
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags '-w' -o binary ./
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags '-s -w' -o go-binary ./
+
+RUN upx -f --brute -o binary go-binary
 
 FROM scratch
 
 LABEL name="pihole-exporter"
 
 WORKDIR /root/
-
 COPY --from=builder /go/src/github.com/eko/pihole-exporter/binary pihole-exporter
 
 CMD ["./pihole-exporter"]