clean up docker file

Author: smetroid

Dockerfile

@@ -1,29 +1,25 @@
 FROM alpine:edge
 
-ENV DOCKERIZE_VERSION 0.2.0
-RUN apk add --no-cache ca-certificates curl && \
-    mkdir -p /usr/local/bin/ && \
-    curl -SL https://github.com/jwilder/dockerize/releases/download/v${DOCKERIZE_VERSION}/dockerize-linux-amd64-v${DOCKERIZE_VERSION}.tar.gz \
-    | tar xzC /usr/local/bin
 RUN mkdir /go
 ENV GOPATH /go
-RUN set -ex \
-	  && apk add --no-cache --virtual .build-deps \
-		git \
-		go \
-		build-base
-
+ENV GOBIN /go/bin
+VOLUME /etc/telegraf
 ENV TELEGRAF github.com/influxdata/telegraf
-RUN go get github.com/influxdata/telegraf
-COPY . $GOPATH/src/$TELEGRAF/
-COPY ./example.conf /etc/telegraf/telegraf.conf
 WORKDIR $GOPATH/src/$TELEGRAF/
-RUN make
-
-RUN apk del .build-deps \
-	  && rm -rf $GOPATH/pkg \
-	  && rm -rf $GOPATH/src/github.com/influxdata \
-	  && rm -rf $GOPATH/bin/gdm
+#RUN go get github.com/influxdata/telegraf
+COPY . $GOPATH/src/$TELEGRAF/
+RUN set -ex && \
+	  apk add --no-cache --virtual .build-deps \
+		git \
+		go \
+		build-base && \
+		go get github.com/sparrc/gdm && \
+		/go/bin/gdm restore && \
+    go install cmd/telegraf/telegraf.go && \
+    apk del .build-deps && \
+	  rm -rf $GOPATH/pkg && \
+	  rm -rf $GOPATH/src && \
+	  rm -rf /usr && \
+	  rm -rf $GOPATH/bin/gdm
 
-CMD dockerize \
-  $GOPATH/bin/telegraf
+CMD /go/bin/telegraf