cli.py
# Copyright (C) 2015-2020 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information
# WARNING: do not import unnecessary things here to keep cli startup time under
# control
import logging
import os
from typing import Dict, Optional
import click
from swh.core.cli import CONTEXT_SETTINGS
from swh.core.cli import swh as swh_cli_group
try:
from systemd.daemon import notify
except ImportError:
notify = None
@swh_cli_group.group(name="storage", context_settings=CONTEXT_SETTINGS)
@click.option(
"--config-file",
"-C",
default=None,
type=click.Path(exists=True, dir_okay=False,),
help="Configuration file.",
)
@click.option(
"--check-config",
default=None,
type=click.Choice(["no", "read", "write"]),
help=(
"Check the configuration of the storage at startup for read or write access; "
"if set, override the value present in the configuration file if any. "
"Defaults to 'read' for the 'backfill' command, and 'write' for 'rpc-server' "
"and 'replay' commands."
),
)
@click.pass_context
def storage(ctx, config_file, check_config):
"""Software Heritage Storage tools."""
from swh.core import config
if not config_file:
config_file = os.environ.get("SWH_CONFIG_FILENAME")
if config_file:
if not os.path.exists(config_file):
raise ValueError("%s does not exist" % config_file)
conf = config.read(config_file)
else:
conf = {}
if "storage" not in conf:
ctx.fail("You must have a storage configured in your config file.")
ctx.ensure_object(dict)
ctx.obj["config"] = conf
ctx.obj["check_config"] = check_config
@storage.command(name="rpc-serve")
@click.option(
"--host",
default="0.0.0.0",
metavar="IP",
show_default=True,
help="Host ip address to bind the server on",
)
@click.option(
"--port",
default=5002,
type=click.INT,
metavar="PORT",
show_default=True,
help="Binding port of the server",
)
@click.option(
"--debug/--no-debug",
default=True,
help="Indicates if the server should run in debug mode",
)
@click.pass_context
def serve(ctx, host, port, debug):
"""Software Heritage Storage RPC server.
Do NOT use this in a production environment.
"""
from swh.storage.api.server import app
if "log_level" in ctx.obj:
logging.getLogger("werkzeug").setLevel(ctx.obj["log_level"])
ensure_check_config(ctx.obj["config"], ctx.obj["check_config"], "write")
app.config.update(ctx.obj["config"])
app.run(host, port=int(port), debug=bool(debug))
@storage.command()
@click.argument("object_type")
@click.option("--start-object", default=None)
@click.option("--end-object", default=None)
@click.option("--dry-run", is_flag=True, default=False)
@click.pass_context
def backfill(ctx, object_type, start_object, end_object, dry_run):
"""Run the backfiller
The backfiller list objects from a Storage and produce journal entries from
there.
Typically used to rebuild a journal or compensate for missing objects in a
journal (eg. due to a downtime of this later).
The configuration file requires the following entries:
- brokers: a list of kafka endpoints (the journal) in which entries will be
added.
- storage_dbconn: URL to connect to the storage DB.
- prefix: the prefix of the topics (topics will be <prefix>.<object_type>).
- client_id: the kafka client ID.
"""
ensure_check_config(ctx.obj["config"], ctx.obj["check_config"], "read")
# for "lazy" loading
from swh.storage.backfill import JournalBackfiller
try:
from systemd.daemon import notify
except ImportError:
notify = None
conf = ctx.obj["config"]
backfiller = JournalBackfiller(conf)
if notify:
notify("READY=1")
try:
backfiller.run(
object_type=object_type,
start_object=start_object,
end_object=end_object,
dry_run=dry_run,
)
except KeyboardInterrupt:
if notify:
notify("STOPPING=1")
ctx.exit(0)
@storage.command()
@click.option(
"--stop-after-objects",
"-n",
default=None,
type=int,
help="Stop after processing this many objects. Default is to " "run forever.",
)
@click.pass_context
def replay(ctx, stop_after_objects):
"""Fill a Storage by reading a Journal.
There can be several 'replayers' filling a Storage as long as they use
the same `group-id`.
"""
import functools
from swh.journal.client import get_journal_client
from swh.storage import get_storage
from swh.storage.replay import process_replay_objects
ensure_check_config(ctx.obj["config"], ctx.obj["check_config"], "write")
conf = ctx.obj["config"]
storage = get_storage(**conf.pop("storage"))
client_cfg = conf.pop("journal_client")
if stop_after_objects:
client_cfg["stop_after_objects"] = stop_after_objects
try:
client = get_journal_client(**client_cfg)
except ValueError as exc:
ctx.fail(exc)
worker_fn = functools.partial(process_replay_objects, storage=storage)
if notify:
notify("READY=1")
try:
client.process(worker_fn)
except KeyboardInterrupt:
ctx.exit(0)
else:
print("Done.")
finally:
if notify:
notify("STOPPING=1")
client.close()
def ensure_check_config(storage_cfg: Dict, check_config: Optional[str], default: str):
"""Helper function to inject the setting of check_config option in the storage config
dict according to the expected default value (default value depends on the command,
eg. backfill can be read-only).
"""
if check_config is not None:
if check_config == "no":
storage_cfg.pop("check_config", None)
else:
storage_cfg["check_config"] = {"check_write": check_config == "write"}
else:
if "check_config" not in storage_cfg:
storage_cfg["check_config"] = {"check_write": default == "write"}
def main():
logging.basicConfig()
return serve(auto_envvar_prefix="SWH_STORAGE")
if __name__ == "__main__":
main()