68c1413dbd
This restores the functionality that the InfluxDB status polling script had whereby instead of using a new grpc Channel for each RPC call, it would keep one open and reuse it, retrying one time if it ever fails, which can happen if the connection is lost between calls. Now all the grpc scripts have this functionality. Also, hedge a little bit in the descriptions for what the obstruction detail fields means, given that I'm not sure my assumptions there are correct.
251 lines
9.9 KiB
Python
251 lines
9.9 KiB
Python
"""Shared code among the dish_grpc_* commands
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Note:
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This module is not intended to be generically useful or to export a stable
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interface. Rather, it should be considered an implementation detail of the
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other scripts, and will change as needed.
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For a module that exports an interface intended for general use, see
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starlink_grpc.
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"""
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import argparse
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from datetime import datetime
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from datetime import timezone
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import logging
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import re
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import time
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import starlink_grpc
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BRACKETS_RE = re.compile(r"([^[]*)(\[((\d+),|)(\d*)\]|)$")
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SAMPLES_DEFAULT = 3600
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LOOP_TIME_DEFAULT = 0
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STATUS_MODES = ["status", "obstruction_detail", "alert_detail"]
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PING_MODES = ["ping_drop", "ping_run_length"]
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UNGROUPED_MODES = []
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def create_arg_parser(output_description, bulk_history=True):
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"""Create an argparse parser and add the common command line options."""
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parser = argparse.ArgumentParser(
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description="Collect status and/or history data from a Starlink user terminal and " +
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output_description,
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epilog="Additional arguments can be read from a file by including the @FILENAME as an "
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"option, where FILENAME is a path to a file that contains arguments, one per line.",
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fromfile_prefix_chars="@",
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add_help=False)
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all_modes = STATUS_MODES + PING_MODES + UNGROUPED_MODES
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if bulk_history:
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all_modes.append("bulk_history")
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parser.add_argument("mode",
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nargs="+",
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choices=all_modes,
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help="The data group to record, one or more of: " + ", ".join(all_modes),
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metavar="mode")
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group = parser.add_argument_group(title="General options")
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group.add_argument("-h", "--help", action="help", help="Be helpful")
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group.add_argument("-t",
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"--loop-interval",
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type=float,
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default=float(LOOP_TIME_DEFAULT),
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help="Loop interval in seconds or 0 for no loop, default: " +
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str(LOOP_TIME_DEFAULT))
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group.add_argument("-v", "--verbose", action="store_true", help="Be verbose")
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group = parser.add_argument_group(title="History mode options")
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group.add_argument("-a",
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"--all-samples",
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action="store_const",
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const=-1,
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dest="samples",
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help="Parse all valid samples")
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if bulk_history:
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sample_help = ("Number of data samples to parse; in bulk mode, applies to first loop "
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"iteration only, default: -1 in bulk mode, loop interval if loop interval "
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"set, else " + str(SAMPLES_DEFAULT))
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else:
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sample_help = ("Number of data samples to parse, default: loop interval, if set, else " +
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str(SAMPLES_DEFAULT))
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group.add_argument("-s", "--samples", type=int, help=sample_help)
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return parser
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def run_arg_parser(parser, need_id=False, no_stdout_errors=False):
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"""Run parse_args on a parser previously created with create_arg_parser
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Args:
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need_id (bool): A flag to set in options to indicate whether or not to
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set dish_id on the global state object; see get_data for more
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detail.
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no_stdout_errors (bool): A flag set in options to protect stdout from
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error messages, in case that's where the data output is going, so
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may be being redirected to a file.
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Returns:
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An argparse Namespace object with the parsed options set as attributes.
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"""
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opts = parser.parse_args()
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# for convenience, set flags for whether any mode in a group is selected
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opts.satus_mode = bool(set(STATUS_MODES).intersection(opts.mode))
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opts.ping_mode = bool(set(PING_MODES).intersection(opts.mode))
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opts.bulk_mode = "bulk_history" in opts.mode
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if opts.samples is None:
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opts.samples = -1 if opts.bulk_mode else int(
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opts.loop_interval) if opts.loop_interval >= 1.0 else SAMPLES_DEFAULT
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opts.no_stdout_errors = no_stdout_errors
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opts.need_id = need_id
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return opts
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def conn_error(opts, msg, *args):
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"""Indicate an error in an appropriate way."""
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# Connection errors that happen in an interval loop are not critical
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# failures, but are interesting enough to print in non-verbose mode.
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if opts.loop_interval > 0.0 and not opts.no_stdout_errors:
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print(msg % args)
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else:
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logging.error(msg, *args)
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class GlobalState:
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"""A class for keeping state across loop iterations."""
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def __init__(self):
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self.counter = None
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self.timestamp = None
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self.dish_id = None
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self.context = starlink_grpc.ChannelContext()
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def shutdown(self):
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self.context.close()
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def get_data(opts, gstate, add_item, add_sequence, add_bulk=None):
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"""Fetch data from the dish, pull it apart and call back with the pieces.
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This function uses call backs to return the useful data. If need_id is set
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in opts, then it is guaranteed that dish_id will have been set in gstate
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prior to any of the call backs being invoked.
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Args:
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opts (object): The options object returned from run_arg_parser.
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gstate (GlobalState): An object for keeping track of state across
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multiple calls.
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add_item (function): Call back for non-sequence data, with prototype:
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add_item(name, value, category)
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add_sequence (function): Call back for sequence data, with prototype:
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add_sequence(name, value, category, start_index_label)
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add_bulk (function): Optional. Call back for bulk history data, with
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prototype:
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add_bulk(bulk_data, count, start_timestamp, start_counter)
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Returns:
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1 if there were any failures getting data from the dish, otherwise 0.
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"""
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def add_data(data, category):
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for key, val in data.items():
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name, start, seq = BRACKETS_RE.match(key).group(1, 4, 5)
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if seq is None:
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add_item(name, val, category)
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else:
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add_sequence(name, val, category, int(start) if start else 0)
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if opts.satus_mode:
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try:
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status_data, obstruct_detail, alert_detail = starlink_grpc.status_data(
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context=gstate.context)
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except starlink_grpc.GrpcError as e:
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if "status" in opts.mode:
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if opts.need_id and gstate.dish_id is None:
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conn_error(opts, "Dish unreachable and ID unknown, so not recording state")
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else:
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if opts.verbose:
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print("Dish unreachable")
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if "status" in opts.mode:
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add_item("state", "DISH_UNREACHABLE", "status")
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return 0
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return 1
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if opts.need_id:
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gstate.dish_id = status_data["id"]
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del status_data["id"]
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if "status" in opts.mode:
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add_data(status_data, "status")
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if "obstruction_detail" in opts.mode:
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add_data(obstruct_detail, "status")
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if "alert_detail" in opts.mode:
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add_data(alert_detail, "status")
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elif opts.need_id and gstate.dish_id is None:
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try:
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gstate.dish_id = starlink_grpc.get_id(context=gstate.context)
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except starlink_grpc.GrpcError as e:
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conn_error(opts, "Failure getting dish ID: %s", str(e))
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return 1
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if opts.verbose:
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print("Using dish ID: " + gstate.dish_id)
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if opts.ping_mode:
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try:
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general, ping, runlen = starlink_grpc.history_ping_stats(opts.samples,
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opts.verbose,
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context=gstate.context)
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except starlink_grpc.GrpcError as e:
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conn_error(opts, "Failure getting ping stats: %s", str(e))
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return 1
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add_data(general, "ping_stats")
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if "ping_drop" in opts.mode:
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add_data(ping, "ping_stats")
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if "ping_run_length" in opts.mode:
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add_data(runlen, "ping_stats")
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if opts.bulk_mode and add_bulk:
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before = time.time()
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start = gstate.counter
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parse_samples = opts.samples if start is None else -1
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try:
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general, bulk = starlink_grpc.history_bulk_data(parse_samples,
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start=start,
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verbose=opts.verbose,
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context=gstate.context)
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except starlink_grpc.GrpcError as e:
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conn_error(opts, "Failure getting history: %s", str(e))
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return 1
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after = time.time()
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parsed_samples = general["samples"]
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new_counter = general["end_counter"]
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timestamp = gstate.timestamp
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# check this first, so it doesn't report as lost time sync
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if gstate.counter is not None and new_counter != gstate.counter + parsed_samples:
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timestamp = None
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# Allow up to 2 seconds of time drift before forcibly re-syncing, since
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# +/- 1 second can happen just due to scheduler timing.
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if timestamp is not None and not before - 2.0 <= timestamp + parsed_samples <= after + 2.0:
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if opts.verbose:
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print("Lost sample time sync at: " +
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str(datetime.fromtimestamp(timestamp + parsed_samples, tz=timezone.utc)))
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timestamp = None
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if timestamp is None:
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timestamp = int(before)
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if opts.verbose:
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print("Establishing new time base: {0} -> {1}".format(
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new_counter, datetime.fromtimestamp(timestamp, tz=timezone.utc)))
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timestamp -= parsed_samples
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add_bulk(bulk, parsed_samples, timestamp, new_counter - parsed_samples)
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gstate.counter = new_counter
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gstate.timestamp = timestamp + parsed_samples
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return 0
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