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| Original file line number | Diff line number | Diff line change |
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| @@ -1,68 +1,32 @@ | ||
| # Accept the Go version for the image to be set as a build argument. | ||
| ARG GO_VERSION=1.15 | ||
| # First stage: build the executable. | ||
| FROM golang:${GO_VERSION}-alpine AS builder | ||
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| ARG VERSION="" | ||
| ARG BRANCH="" | ||
| ARG COMMIT="" | ||
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| # Create the user and group files that will be used in the running container to | ||
| # run the process as an unprivileged user. | ||
| RUN mkdir /user && \ | ||
| echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd && \ | ||
| echo 'nobody:x:65534:' > /user/group | ||
| FROM alpine AS builder | ||
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| # Install the Certificate-Authority certificates for the app to be able to make | ||
| # calls to HTTPS endpoints. | ||
| # Git is required for fetching the dependencies. | ||
| RUN apk add --no-cache ca-certificates git | ||
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| # Set the working directory outside $GOPATH to enable the support for modules. | ||
| WORKDIR /src | ||
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| # Fetch dependencies first; they are less susceptible to change on every build | ||
| # and will therefore be cached for speeding up the next build | ||
| COPY ./go.mod ./go.sum ./ | ||
| RUN go mod download | ||
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| # Import the code from the context. | ||
| COPY ./ ./ | ||
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| # Build the executable to `/app`. Mark the build as statically linked. | ||
| RUN CGO_ENABLED=0 go build \ | ||
| -installsuffix 'static' \ | ||
| -ldflags "-X main.Revision=${COMMIT} \ | ||
| -X main.Branch=${BRANCH} \ | ||
| -X main.Version=${VERSION} \ | ||
| -X main.BuildDate=$(date -u ""+%Y%m%d-%H:%M:%S"")" \ | ||
| -o /app . | ||
| RUN apk add --no-cache ca-certificates | ||
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| # Final stage: the running container. | ||
| FROM scratch AS final | ||
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| # Add maintainer label in case somebody has questions. | ||
| LABEL maintainer="Kris.Budde@gmail.com" | ||
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| # Import the user and group files from the first stage. | ||
| COPY --from=builder /user/group /user/passwd /etc/ | ||
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| # Import the Certificate-Authority certificates for enabling HTTPS. | ||
| COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ | ||
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| # Import the compiled executable from the first stage. | ||
| COPY --from=builder /app /app | ||
| COPY rabbitmq_exporter /rabbitmq_exporter | ||
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| # Declare the port on which the webserver will be exposed. | ||
| # As we're going to run the executable as an unprivileged user, we can't bind | ||
| # to ports below 1024. | ||
| EXPOSE 9419 | ||
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| # Perform any further action as an unprivileged user. | ||
| USER nobody:nobody | ||
| USER 65535:65535 | ||
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| # Check if exporter is alive; 10 retries gives prometheus some time to retrieve bad data (5 minutes) | ||
| HEALTHCHECK --retries=10 CMD ["/app", "-check-url", "http://localhost:9419/health"] | ||
| HEALTHCHECK --retries=10 CMD ["/rabbitmq_exporter", "-check-url", "http://localhost:9419/health"] | ||
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| # Run the compiled binary. | ||
| ENTRYPOINT ["/app"] | ||
| ENTRYPOINT ["/rabbitmq_exporter"] |