Place docker files in scripts and update makefile

scripts/alpine.docker

@@ -0,0 +1,21 @@
+FROM golang:1.11.0 as builder
+ENV DEP_VERSION 0.5.0
+RUN curl -fsSL -o /usr/local/bin/dep https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 && chmod +x /usr/local/bin/dep
+WORKDIR /go/src/github.com/influxdata/telegraf
+COPY Gopkg.toml Gopkg.lock ./
+RUN dep ensure -vendor-only
+COPY . /go/src/github.com/influxdata/telegraf
+RUN CGO_ENABLED=0 make go-install
+
+FROM alpine:3.6
+RUN echo 'hosts: files dns' >> /etc/nsswitch.conf
+RUN apk add --no-cache iputils ca-certificates net-snmp-tools procps lm_sensors && \
+    update-ca-certificates
+COPY --from=builder /go/bin/* /usr/bin/
+COPY etc/telegraf.conf /etc/telegraf/telegraf.conf
+
+EXPOSE 8125/udp 8092/udp 8094
+
+COPY scripts/docker-entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["telegraf"]

scripts/dev.docker

@@ -1,8 +0,0 @@
-FROM debian:stretch
-ARG package
-ADD ${package} ${package}
-RUN dpkg -i ${package}
-
-EXPOSE 8125/udp 8092/udp 8094
-
-CMD ["telegraf"]

scripts/docker-entrypoint.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+if [ "${1:0:1}" = '-' ]; then
+    set -- telegraf "$@"
+fi
+
+exec "$@"

scripts/stretch.docker

@@ -0,0 +1,18 @@
+FROM golang:1.11.0 as builder
+ENV DEP_VERSION 0.5.0
+RUN curl -fsSL -o /usr/local/bin/dep https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 && chmod +x /usr/local/bin/dep
+WORKDIR /go/src/github.com/influxdata/telegraf
+COPY Gopkg.toml Gopkg.lock ./
+RUN dep ensure -vendor-only
+COPY . /go/src/github.com/influxdata/telegraf
+RUN make go-install
+
+FROM buildpack-deps:stretch-curl
+COPY --from=builder /go/bin/* /usr/bin/
+COPY etc/telegraf.conf /etc/telegraf/telegraf.conf
+
+EXPOSE 8125/udp 8092/udp 8094
+
+COPY scripts/docker-entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["telegraf"]