Merge pull request #76 from cmeury/update-dockerfile

Upgrade container to alpine 3.7 and Helm 2.8.2 & check sha256

Dockerfile

@@ -1,8 +1,13 @@
-FROM alpine:3.4
+FROM alpine:3.7
 
-RUN apk add --update curl && \
-	curl -L https://kubernetes-helm.storage.googleapis.com/helm-v2.0.0-linux-amd64.tar.gz | \
-	tar zxf - && mv /linux-amd64/helm /usr/local/bin/ && rm -r /linux-amd64 && apk del curl
+ENV HELM_VERSION=v2.8.2
+ENV HELM_LOCATION="https://kubernetes-helm.storage.googleapis.com"
+ENV HELM_FILENAME="helm-${HELM_VERSION}-linux-amd64.tar.gz"
+ENV HELM_SHA256="614b5ac79de4336b37c9b26d528c6f2b94ee6ccacb94b0f4b8d9583a8dd122d3"
+RUN wget ${HELM_LOCATION}/${HELM_FILENAME} && \
+    sha256sum ${HELM_FILENAME} | grep -q "${HELM_SHA256}" && \
+    tar zxf ${HELM_FILENAME} && mv /linux-amd64/helm /usr/local/bin/ && \
+    rm ${HELM_FILENAME} && rm -r /linux-amd64
 
 COPY dist/helmfile_linux_amd64 /usr/local/bin/helmfile
 

Makefile

@@ -36,6 +36,9 @@ release: pristine cross
 image: cross
 	docker build -t quay.io/roboll/helmfile:${TAG} .
 
+run: image
+	docker run --rm -it -t quay.io/roboll/helmfile:${TAG} sh
+
 push: image
 	docker push quay.io/roboll/helmfile:${TAG}