starlink-grpc-tools/dish_grpc_prometheus.py

#!/usr/bin/python3
"""Prometheus exporter for Starlink user terminal data info.

This script pulls the current status info and/or metrics computed from the
history data and makes it available via HTTP in the format Prometeus expects.
"""

import logging
import sys
from http import HTTPStatus
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer

import dish_common


class MetricInfo:
    unit = ""
    kind = "gauge"
    help = ""

    def __init__(self, unit=None, kind=None, help=None) -> None:
        if unit:
            self.unit = f"_{unit}"
        if kind:
            self.kind = kind
        if help:
            self.help = help
        pass


METRICS_INFO = {
    "status_uptime": MetricInfo(unit="seconds", kind="counter"),
    "status_snr": MetricInfo(),
    "status_seconds_to_first_nonempty_slot": MetricInfo(),
    "status_pop_ping_drop_rate": MetricInfo(),
    "status_downlink_throughput_bps": MetricInfo(),
    "status_uplink_throughput_bps": MetricInfo(),
    "status_pop_ping_latency_ms": MetricInfo(),
    "status_alerts": MetricInfo(),
    "status_fraction_obstructed": MetricInfo(),
    "status_currently_obstructed": MetricInfo(),
    "status_seconds_obstructed": MetricInfo(),
    "status_obstruction_duration": MetricInfo(),
    "status_obstruction_interval": MetricInfo(),
    "status_direction_azimuth": MetricInfo(),
    "status_direction_elevation": MetricInfo(),
    "status_is_snr_above_noise_floor": MetricInfo(),
    "status_alert_motors_stuck": MetricInfo(),
    "status_alert_thermal_throttle": MetricInfo(),
    "status_alert_thermal_shutdown": MetricInfo(),
    "status_alert_mast_not_near_vertical": MetricInfo(),
    "status_alert_unexpected_location": MetricInfo(),
    "status_alert_slow_ethernet_speeds": MetricInfo(),
    "status_alert_roaming": MetricInfo(),
    "status_alert_install_pending": MetricInfo(),
    "status_alert_is_heating": MetricInfo(),
    "status_alert_power_supply_thermal_throttle": MetricInfo(),
    "ping_stats_samples": MetricInfo(kind="counter"),
    "ping_stats_end_counter": MetricInfo(kind="counter"),
    "usage_download_usage": MetricInfo(unit="bytes", kind="counter"),
    "usage_upload_usage": MetricInfo(unit="bytes", kind="counter"),
}

STATE_VALUES = [
    "UNKNOWN",
    "CONNECTED",
    "BOOTING",
    "SEARCHING",
    "STOWED",
    "THERMAL_SHUTDOWN",
    "NO_SATS",
    "OBSTRUCTED",
    "NO_DOWNLINK",
    "NO_PINGS",
    "DISH_UNREACHABLE",
]


class Metric:
    name = ""
    timestamp = ""
    kind = None
    help = None
    values = None

    def __init__(self, name, timestamp, kind="gauge", help="", values=None):
        self.name = name
        self.timestamp = timestamp
        self.kind = kind
        self.help = help
        if values:
            self.values = values
        else:
            self.values = []
        pass

    def __str__(self):
        if not self.values:
            return ""

        lines = []
        lines.append(f"# HELP {self.name} {self.help}")
        lines.append(f"# TYPE {self.name} {self.kind}")
        for value in self.values:
            lines.append(f"{self.name}{value} {self.timestamp*1000}")
        lines.append("")
        return str.join("\n", lines)


class MetricValue:
    value = 0
    labels = None

    def __init__(self, value, labels=None) -> None:
        self.value = value
        self.labels = labels

    def __str__(self):
        label_str = ""
        if self.labels:
            label_str = (
                "{"
                + str.join(",", [f'{v[0]}="{v[1]}"' for v in self.labels.items()])
                + "}"
            )
        return f"{label_str} {self.value}"


opts = None
gstate = None


def parse_args():
    global opts

    parser = dish_common.create_arg_parser(
        output_description="Prometheus exporter", bulk_history=False
    )

    group = parser.add_argument_group(title="HTTP server options")
    group.add_argument("--address", default="0.0.0.0", help="IP address to listen on")
    group.add_argument("--port", default=8080, type=int, help="Port to listen on")

    opts = dish_common.run_arg_parser(parser)


def prometheus_export():
    global opts, gstate

    raw_data = {}

    def data_add_item(name, value, category):
        raw_data[category + "_" + name] = value
        pass

    def data_add_sequencem(name, value, category, start):
        raise NotImplementedError("Did not expect sequence data")

    rc, status_ts, hist_ts = dish_common.get_data(
        opts, gstate, data_add_item, data_add_sequencem
    )

    metrics = []

    metrics.append(
        Metric(
            name="starlink_status_state",
            timestamp=status_ts,
            values=[
                MetricValue(
                    value=int(raw_data["status_state"] == state_value),
                    labels={"state": state_value},
                )
                for state_value in STATE_VALUES
            ],
        )
    )
    del raw_data["status_state"]

    info_metrics = ["status_id", "status_hardware_version", "status_software_version"]
    metrics_not_found = []
    metrics_not_found.extend([x for x in info_metrics if x not in raw_data])

    if len(metrics_not_found) < len(info_metrics):
        metrics.append(
            Metric(
                name="starlink_info",
                timestamp=status_ts,
                values=[
                    MetricValue(
                        value=1,
                        labels={
                            x.replace("status_", ""): raw_data.pop(x)
                            for x in info_metrics
                            if x in raw_data
                        },
                    )
                ],
            )
        )

    for name, metric_info in METRICS_INFO.items():
        if name in raw_data:
            metrics.append(
                Metric(
                    name=f"starlink_{name}{metric_info.unit}",
                    timestamp=status_ts,
                    kind=metric_info.kind,
                    values=[MetricValue(value=float(raw_data.pop(name) or 0))],
                )
            )
        else:
            metrics_not_found.append(name)

    metrics.append(
        Metric(
            name="starlink_exporter_unprocessed_metrics",
            timestamp=status_ts,
            values=[MetricValue(value=1, labels={"metric": name}) for name in raw_data],
        )
    )

    metrics.append(
        Metric(
            name="starlink_exporter_missing_metrics",
            timestamp=status_ts,
            values=[
                MetricValue(
                    value=1,
                    labels={"metric": name},
                )
                for name in metrics_not_found
            ],
        )
    )

    return str.join("\n", [str(metric) for metric in metrics])


class MetricsRequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        content = prometheus_export()
        self.send_response(HTTPStatus.OK)
        self.send_header("Content-type", "text/plain")
        self.send_header("Content-Length", len(content))
        self.end_headers()
        self.wfile.write(content.encode())


def main():
    global opts, gstate

    parse_args()

    logging.basicConfig(format="%(levelname)s: %(message)s", stream=sys.stderr)

    gstate = dish_common.GlobalState(target=opts.target)

    httpd = ThreadingHTTPServer((opts.address, opts.port), MetricsRequestHandler)
    httpd.serve_forever()

    sys.exit()


if __name__ == "__main__":
    main()