FROM golang:1.17-alpine as builder

ARG TARGETPLATFORM
ARG TARGETARCH
ARG REVISION

RUN apk --no-cache add alpine-sdk perl curl bash tar

RUN HELM3_VERSION=3.7.2 && \
curl -sSL "https://get.helm.sh/helm-v${HELM3_VERSION}-linux-${TARGETARCH}.tar.gz" | tar xvz && \
chmod +x linux-${TARGETARCH}/helm && mv linux-${TARGETARCH}/helm /usr/local/bin/helm

RUN GRPC_HEALTH_PROBE_VERSION=v0.4.6 && \
wget -qO /usr/local/bin/grpc_health_probe https://github.com/grpc-ecosystem/grpc-health-probe/releases/download/${GRPC_HEALTH_PROBE_VERSION}/grpc_health_probe-linux-${TARGETARCH} && \
chmod +x /usr/local/bin/grpc_health_probe

RUN GHZ_VERSION=0.105.0 && \
curl -sSL "https://github.com/bojand/ghz/archive/refs/tags/v${GHZ_VERSION}.tar.gz" | tar xz -C /tmp && \
cd /tmp/ghz-${GHZ_VERSION}/cmd/ghz && GOARCH=$TARGETARCH go build . && mv ghz /usr/local/bin && \
chmod +x /usr/local/bin/ghz

WORKDIR /workspace

# copy modules manifests
COPY go.mod go.mod
COPY go.sum go.sum

# cache modules
RUN go mod download

# copy source code
COPY cmd/ cmd/
COPY pkg/ pkg/

# build
RUN CGO_ENABLED=0 go build -o loadtester ./cmd/loadtester/*

FROM bash:5.0

ARG TARGETPLATFORM

RUN addgroup -S app && \
adduser -S -g app app && \
apk --no-cache add ca-certificates curl jq libgcc wrk hey

WORKDIR /home/app

COPY --from=bats/bats:v1.1.0 /opt/bats/ /opt/bats/
RUN ln -s /opt/bats/bin/bats /usr/local/bin/

COPY --from=builder /usr/local/bin/helm /usr/local/bin/
COPY --from=builder /usr/local/bin/ghz /usr/local/bin/
COPY --from=builder /usr/local/bin/grpc_health_probe /usr/local/bin/

ADD https://raw.githubusercontent.com/grpc/grpc-proto/master/grpc/health/v1/health.proto /tmp/ghz/health.proto

RUN chown -R app:app ./
RUN chown -R app:app /tmp/ghz

USER app

# test load generator tools
RUN hey -n 1 -c 1 https://flagger.app > /dev/null && echo $? | grep 0
RUN wrk -d 1s -c 1 -t 1 https://flagger.app > /dev/null && echo $? | grep 0

COPY --from=builder --chown=app:app /workspace/loadtester .

ENTRYPOINT ["./loadtester"]
