Distributed Services with Go

Build Your Docker Image

Create a Dockerfile with this code:

DeployLocally/Dockerfile

FROM golang:1.14-alpine AS build
WORKDIR /go/src/proglog
COPY . .
RUN CGO_ENABLED=0 go build -o /go/bin/proglog ./cmd/proglog

FROM scratch
COPY --from=build /go/bin/proglog /bin/proglog
ENTRYPOINT ["/bin/proglog"]

Our Dockerfile uses multistage builds: one stage builds our service and one stage runs it. This makes our Dockerfile easy to read and maintain while keeping our build efficient and the image small.

The build stage uses the golang:1.14-alpine image because we need the Go compiler, our dependencies, and perhaps various system libraries. These take up disk space, and we don’t need them after we have compiled our binary. In the second stage, ...