mirror of https://github.com/balkian/pingish
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60 lines
1.9 KiB
Docker
60 lines
1.9 KiB
Docker
# Accept the Go version for the image to be set as a build argument.
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# Default to Go 1.11
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ARG GO_VERSION=1.11
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# First stage: build the executable.
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FROM golang:${GO_VERSION}-alpine AS builder
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# Create the user and group files that will be used in the running container to
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# run the process as an unprivileged user.
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# RUN mkdir /user && \
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# echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd && \
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# echo 'nobody:x:65534:' > /user/group
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# Install the Certificate-Authority certificates for the app to be able to make
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# calls to HTTPS endpoints.
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# Git is required for fetching the dependencies.
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# libcap might be needed in the future for setcap
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RUN apk add --no-cache ca-certificates git
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# Set the working directory outside $GOPATH to enable the support for modules.
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WORKDIR /src
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# Fetch dependencies first; they are less susceptible to change on every build
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# and will therefore be cached for speeding up the next build
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COPY ./go.mod ./go.sum ./
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RUN go mod download
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# Import the code from the context.
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COPY ./ ./
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# Build the executable to `/app`. Mark the build as statically linked.
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RUN CGO_ENABLED=0 go build \
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-installsuffix 'static' \
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-o /app .
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# Add ping privileges
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# RUN setcap cap_net_raw+ep /app
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# Final stage: the running container.
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FROM scratch AS final
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# Import the user and group files from the first stage.
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# COPY --from=builder /user/group /user/passwd /etc/
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# Import the Certificate-Authority certificates for enabling HTTPS.
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
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# Import the compiled executable from the first stage.
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COPY --from=builder /app /app
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# Declare the port on which the webserver will be exposed.
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# As we're going to run the executable as an unprivileged user, we can't bind
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# to ports below 1024.
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EXPOSE 8080
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# Perform any further action as an unprivileged user.
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# USER nobody:nobody
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# Run the compiled binary.
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ENTRYPOINT ["/app"] |