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cli.py
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# 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
from swh.storage.replay import ModelObjectDeserializer
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.option(
"--type",
"-t",
"object_types",
default=[],
type=click.Choice(
# use a hardcoded list to prevent having to load the
# replay module at cli loading time
[
"origin",
"origin_visit",
"origin_visit_status",
"snapshot",
"revision",
"release",
"directory",
"content",
"skipped_content",
"metadata_authority",
"metadata_fetcher",
"raw_extrinsic_metadata",
"extid",
]
),
help="Object types to replay",
multiple=True,
)
@click.pass_context
def replay(ctx, stop_after_objects, object_types):
"""Fill a Storage by reading a Journal.
This is typically used for a mirror configuration, reading the Software
Heritage kafka journal to retrieve objects of the Software Heritage main
storage to feed a replication storage. There can be several 'replayers'
filling a Storage as long as they use the same `group-id`.
The expected configuration file should have 2 sections:
- storage: the configuration of the storage in which to add objects
received from the kafka journal,
- journal_client: the configuration of access to the kafka journal. See the
documentation of `swh.journal` for more details on the possible
configuration entries in this section.
https://docs.softwareheritage.org/devel/apidoc/swh.journal.client.html
In addition to these 2 mandatory config sections, a third 'replayer' may be
specified with a 'error_reporter' config entry allowing to specify redis
connection parameters that will be used to report non-recoverable mirroring,
eg.::
storage:
[...]
journal_client:
[...]
replayer:
error_reporter:
host: redis.local
port: 6379
db: 1
"""
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")
replayer_cfg = conf.pop("replayer", {})
if "error_reporter" in replayer_cfg:
from redis import Redis
reporter = Redis(**replayer_cfg.get("error_reporter")).set
else:
reporter = None
validate = client_cfg.get("privileged", False)
if not validate and reporter:
ctx.fail(
"Invalid configuration: you cannot have 'error_reporter' set if "
"'privileged' is False; we cannot validate anonymized objects."
)
deserializer = ModelObjectDeserializer(reporter=reporter, validate=validate)
client_cfg["value_deserializer"] = deserializer.convert
if object_types:
client_cfg["object_types"] = object_types
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()

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