# syntax=docker/dockerfile:1

ARG ALPINE_VERSION=3.24
ARG OTELCOL_VERSION=0.154.0

FROM alpine:${ALPINE_VERSION} AS base
FROM base AS downloader
ARG OTELCOL_VERSION
WORKDIR /downloads

RUN --mount=type=cache,target=/var/cache/apk \
    apk add curl tar ca-certificates

RUN ARCH=$(uname -m) && \
    case "$ARCH" in \
        x86_64) TARGETARCH=amd64 ;; \
        aarch64) TARGETARCH=arm64 ;; \
        *) echo "Unsupported architecture: $ARCH"; exit 1 ;; \
    esac && \
    curl -fLo otelcol.tar.gz \
    "https://github.com/open-telemetry/opentelemetry-collector-releases/releases/download/v${OTELCOL_VERSION}/otelcol-contrib_${OTELCOL_VERSION}_linux_${TARGETARCH}.tar.gz" && \
    tar xzf otelcol.tar.gz && \
    chmod +x otelcol-contrib

FROM base

# Install Grafana stack and supervisord from Alpine repositories.
RUN --mount=type=cache,target=/var/cache/apk \
    apk add \
    ca-certificates \
    supervisor \
    grafana \
    mimir \
    loki \
    tempo

# Copy the OTel Collector binary from the downloader stage.
COPY --from=downloader /downloads/otelcol-contrib /usr/local/bin/otelcol-contrib

# Create data, Grafana, and supervisor directories.
RUN mkdir -p /data/grafana && \
    mkdir -p /data/grafana/logs && \
    mkdir -p /data/grafana/plugins && \
    mkdir -p /data/mimir && \
    mkdir -p /data/loki && \
    mkdir -p /data/tempo && \
    mkdir -p /etc/grafana/provisioning/datasources && \
    mkdir -p /etc/grafana/provisioning/dashboards && \
    mkdir -p /etc/grafana/provisioning/plugins && \
    mkdir -p /etc/grafana/provisioning/alerting && \
    mkdir -p /var/log/supervisor && \
    mkdir -p /var/run

# Copy configuration files.
COPY config/grafana.ini /etc/grafana.ini
COPY config/grafana-datasources.yaml /etc/grafana/provisioning/datasources/datasources.yaml
COPY config/grafana-dashboards.yaml /etc/grafana/provisioning/dashboards/grafana-dashboards.yaml
COPY config/grafana-dashboard-jvm-metrics.json /usr/share/grafana/grafana-dashboard-jvm-metrics.json
COPY config/grafana-dashboard-red-metrics-classic.json /usr/share/grafana/grafana-dashboard-red-metrics-classic.json
COPY config/grafana-dashboard-red-metrics-native.json /usr/share/grafana/grafana-dashboard-red-metrics-native.json
COPY config/opentelemetry-collector-hostmetrics-node-exporter.json /usr/share/grafana/opentelemetry-collector-hostmetrics-node-exporter.json

RUN mkdir -p /var/lib/grafana/plugins
RUN grafana cli --config /etc/grafana.ini --homepath /usr/share/grafana --pluginsDir /var/lib/grafana/plugins plugins install grafana-exploretraces-app
RUN grafana cli --config /etc/grafana.ini --homepath /usr/share/grafana --pluginsDir /var/lib/grafana/plugins plugins install grafana-lokiexplore-app
RUN grafana cli --config /etc/grafana.ini --homepath /usr/share/grafana --pluginsDir /var/lib/grafana/plugins plugins install grafana-metricsdrilldown-app
RUN grafana cli --config /etc/grafana.ini --homepath /usr/share/grafana --pluginsDir /var/lib/grafana/plugins plugins install grafana-pyroscope-app

COPY config/mimir.yaml /etc/mimir/mimir.yaml
COPY config/loki.yaml /etc/loki/loki.yaml
COPY config/tempo.yaml /etc/tempo/tempo.yaml
COPY config/otelcol.yaml /etc/otelcol/otelcol.yaml
COPY config/supervisord.conf /etc/supervisor/conf.d/supervisord.conf

# Grafana anonymous admin access, provisioning path, and disable plugin pre-install.
VOLUME ["/data"]

EXPOSE 3000 4318

HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
    CMD wget -qO- http://127.0.0.1:3000/api/health >/dev/null 2>&1 && \
        wget -qO- http://127.0.0.1:13133/ready >/dev/null 2>&1

CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]