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Just download files from a single node in backup #260

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Nov 14, 2024
Merged

Just download files from a single node in backup #260

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34 changes: 19 additions & 15 deletions astacus/manifest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

"""

from argparse import ArgumentParser
from astacus.common import ipc
from astacus.common.rohmustorage import RohmuConfig, RohmuStorage
from pathlib import Path
Expand All @@ -21,7 +22,7 @@
logger = logging.getLogger(__name__)


def create_manifest_parsers(parser, subparsers):
def create_manifest_parsers(parser: ArgumentParser, subparsers):
p_manifest = subparsers.add_parser("manifest", help="Examine Astacus backup manifests")
p_manifest.add_argument("-c", "--config", type=str, required=True, help="Astacus server configuration file to use")
p_manifest.add_argument("-s", "--storage", type=str, help="Storage to use")
Expand Down Expand Up @@ -62,27 +63,30 @@ def create_download_files_parser(subparsers):
)
p_download_files.add_argument("destination", type=str, help="Destination directory to download files to")
p_download_files.add_argument("--prefix", type=str, help="Prefix to filter files", required=True)
p_download_files.add_argument("--node", type=int, help="Node index to download files from", required=True)
p_download_files.set_defaults(func=_run_download_files)


def _run_download_files(args):
rohmu_storage = _create_rohmu_storage(args.config, args.storage)
manifest = rohmu_storage.download_json(args.manifest, ipc.BackupManifest)
destination = Path(args.destination)
for snapshot_result in manifest.snapshot_results:
assert snapshot_result.state
for snapshot_file in snapshot_result.state.files:
if not snapshot_file.relative_path.startswith(args.prefix):
continue

path = destination / snapshot_file.relative_path
path.parent.mkdir(parents=True, exist_ok=True)
logger.info("Downloading %s to %s", snapshot_file.relative_path, path)
if snapshot_file.hexdigest:
rohmu_storage.download_hexdigest_to_path(snapshot_file.hexdigest, path)
else:
assert snapshot_file.content_b64 is not None
path.write_bytes(base64.b64decode(snapshot_file.content_b64))
if args.node >= len(manifest.upload_results):
raise ValueError(f"Node {args.node} not found in manifest")
snapshot_result = manifest.snapshot_results[args.node]
assert snapshot_result.state
for snapshot_file in snapshot_result.state.files:
if not snapshot_file.relative_path.startswith(args.prefix):
continue

path = destination / snapshot_file.relative_path
path.parent.mkdir(parents=True, exist_ok=True)
logger.info("Downloading %s to %s", snapshot_file.relative_path, path)
if snapshot_file.hexdigest:
rohmu_storage.download_hexdigest_to_path(snapshot_file.hexdigest, path)
else:
assert snapshot_file.content_b64 is not None
path.write_bytes(base64.b64decode(snapshot_file.content_b64))


def _run_list(args):
Expand Down
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