filtron/Dockerfile

ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.2-alpine3.13@sha256:12d5f94cd4d2840e538e82e26a5dfddf711b30cc98a9f6e01bcf65d7aaf7ccd8 AS builder-amd64
FROM arm32v7/golang:1.16.2-alpine3.13@sha256:6f7bcdb508aab1815cae87fba19bce654dc86162c59b7b5b5298896e832115f0 AS builder-arm
FROM arm64v8/golang:1.16.2-alpine3.13@sha256:d139df25369b0041837d156863d2502187a4e7d93c7af4f25202b10a099abd02 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="1.33-r1" git="2.30.2-r0" curl="7.74.0-r1" && \
    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:3.13.2@sha256:4661fb57f7890b9145907a1fe2555091d333ff3d28db86c3bb906f6a2be93c87 AS base-amd64
FROM arm32v7/alpine:3.13.2@sha256:db5f021b29ec8fcf605f00d2aac06345756b0ffbdea0e7994044fe9172619a0a AS base-arm
FROM arm64v8/alpine:3.13.2@sha256:c45a1db6e04b73aad9e06b08f2de11ce8e92d894141b2e801615fa7a8f68314a 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"]