64 lines
2.5 KiB
Python
Executable File
64 lines
2.5 KiB
Python
Executable File
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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import argparse
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import os
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import subprocess
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import sys
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import tempfile
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from lxcmgr import lxcmgr
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from lxcmgr.paths import LXC_ROOT
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def get_layers(container):
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with open(os.path.join(LXC_ROOT, container, 'config')) as f:
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for line in f.read().splitlines():
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if line.startswith('lxc.hook.pre-start'):
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return line.split()[-1].split(',')
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def extract(args):
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with tempfile.TemporaryDirectory() as tmp_rootfs:
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layers = get_layers(args.container)
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lxcmgr.mount_rootfs(args.container, layers, tmp_rootfs)
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source = os.path.join(tmp_rootfs, args.source.lstrip('/'))
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# Plain cp -pr as shutil.copytree() requires nonexistent target and copy2() doesn't retain owner
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subprocess.run(['cp', '-pr', source, args.destination])
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lxcmgr.unmount_rootfs(tmp_rootfs)
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def main(args):
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if args.action == 'prepare':
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# Used with LXC hooks on container startup
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lxcmgr.prepare_container(args.container, args.layers)
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elif args.action == 'cleanup':
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# Used with LXC hooks on container stop
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lxcmgr.cleanup_container(args.container)
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elif args.action == 'extract':
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# Used in install.sh scripts to get files or directories from containers rootfs (excluding persistent mounts)
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extract(args)
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parser = argparse.ArgumentParser(description='Collection of auxiliary LXC tools')
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subparsers = parser.add_subparsers()
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parser_prepare = subparsers.add_parser('prepare', help='Perform pre-start steps for LXC')
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parser_prepare.set_defaults(action='prepare')
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parser_prepare.add_argument('layers', help='OverlayFS LXC rootfs layers')
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parser_prepare.add_argument('container', help='Container name')
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parser_prepare.add_argument('lxc', nargs=argparse.REMAINDER)
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parser_cleanup = subparsers.add_parser('cleanup', help='Perform post-stop steps for LXC')
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parser_cleanup.set_defaults(action='cleanup')
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parser_cleanup.add_argument('container', help='Container name')
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parser_cleanup.add_argument('lxc', nargs=argparse.REMAINDER)
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parser_extract = subparsers.add_parser('extract', help='Extracts files or directories from containers rootfs (excluding persistent mounts)')
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parser_extract.set_defaults(action='extract')
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parser_extract.add_argument('container', help='Container name')
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parser_extract.add_argument('source', help='Source file or directory within the container')
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parser_extract.add_argument('destination', help='Destination file or directory on the host')
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args = parser.parse_args()
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if hasattr(args, 'action'):
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main(args)
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else:
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parser.print_usage()
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