FROM [[ .docker.repo ]][[ .docker.base_images.alpine.image ]] AS builder

ARG ES_EXPORTER_VERSION=[[ .elasticsearch.exporter.version ]]

RUN set -eux &&\
    apk add curl ca-certificates &&\
    cd /tmp &&\
    curl -sSLO https://github.com/prometheus-community/elasticsearch_exporter/releases/download/v${ES_EXPORTER_VERSION}/elasticsearch_exporter-${ES_EXPORTER_VERSION}.linux-amd64.tar.gz &&\
    curl -sSLO https://github.com/prometheus-community/elasticsearch_exporter/releases/download/v${ES_EXPORTER_VERSION}/sha256sums.txt &&\
    grep "elasticsearch_exporter-${ES_EXPORTER_VERSION}.linux-amd64.tar.gz" sha256sums.txt | sha256sum -c &&\
    tar xzf elasticsearch_exporter-${ES_EXPORTER_VERSION}.linux-amd64.tar.gz &&\
    mv elasticsearch_exporter-${ES_EXPORTER_VERSION}.linux-amd64/elasticsearch_exporter /

FROM [[ .docker.repo ]][[ .docker.base_images.alpine.image ]]
MAINTAINER [[ .docker.maintainer ]]

RUN set -eux &&\
    apk --no-cache upgrade &&\
    apk add ca-certificates

COPY --from=builder /elasticsearch_exporter /usr/local/bin/

EXPOSE 9114
USER 9114
CMD ["elasticsearch_exporter"]