Automate Your Home Using Go

Containing and Deploying the Exporter

Now that you have a working exporter for your Pico W temperature sensor, let’s create an image to run the exporter as a container in your Raspberry Pi infrastructure, similar to what you did in ​Containing the Server​.

First, create a Dockerfile using the multi-stage approach to compile your Go Prometheus exporter in the first stage, and create an image for it in the second stage:

tempmonitor/exporter/Dockerfile

FROM docker.io/golang:1.22 AS builder
RUN mkdir /app
WORKDIR /app
COPY . /app
RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags="-s -w"

FROM docker.io/alpine:latest
RUN mkdir /app && adduser -h /app -D picotempexport
WORKDIR /app
COPY --chown=picotempexport --from=builder /app/picotempexport ...