filtron/Dockerfile

ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.4-alpine3.13@sha256:9dd1788d4bd0df3006d79a88bda67cb8357ab49028eebbcb1ae64f2ec07be627 AS builder-amd64
FROM arm32v7/golang:1.16.4-alpine3.13@sha256:548bc43bf742aa612cc545b3dc3617076d128b0b1f74f58844a51f728f6566e7 AS builder-arm
FROM arm64v8/golang:1.16.4-alpine3.13@sha256:a1d4b3af00ca82f19ec92bbc254733d7f9bdd992987f2f5dd63798b183914d5b AS builder-arm64
FROM builder-${ARCH} AS builder

ENV FILTRON_VERSION="v0.2.0"

WORKDIR $GOPATH/src/github.com/asciimoo/filtron

RUN apk upgrade --no-cache && \
    apk add --no-cache tar="1.34-r0" git="2.30.2-r0" curl="7.77.0-r0" && \
    curl -L "https://github.com/asciimoo/filtron/archive/${FILTRON_VERSION}.tar.gz" | tar xvz --strip 1

RUN go get -d -v && gofmt -l ./ && go build .

# STEP 2 build the image including only the binary
FROM amd64/alpine:3.13.5@sha256:def822f9851ca422481ec6fee59a9966f12b351c62ccb9aca841526ffaa9f748 AS base-amd64
FROM arm32v7/alpine:3.13.5@sha256:9663906b1c3bf891618ebcac857961531357525b25493ef717bca0f86f581ad6 AS base-arm
FROM arm64v8/alpine:3.13.5@sha256:8f18fae117ec6e5777cc62ba78cbb3be10a8a38639ccfb949521abd95c8301a4 AS base-arm64
FROM base-${ARCH}

RUN apk --no-cache add ca-certificates="20191127-r5" && \
    adduser -D -h /usr/local/filtron -s /bin/false filtron filtron

COPY --from=builder /go/src/github.com/asciimoo/filtron/example_rules.json /etc/filtron/rules.json
COPY --from=builder /go/src/github.com/asciimoo/filtron/filtron /usr/local/filtron/filtron

EXPOSE 3000
USER filtron

ENTRYPOINT ["/usr/local/filtron/filtron", "--rules", "/etc/filtron/rules.json"]