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run-config-migration.py
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run-config-migration.py
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#!/usr/bin/python3
# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library. If not, see <http://www.gnu.org/licenses/>.
import os
import sys
import argparse
import datetime
from vyos.util import cmd
from vyos.migrator import Migrator, VirtualMigrator
def main():
argparser = argparse.ArgumentParser(
formatter_class=argparse.RawTextHelpFormatter)
argparser.add_argument('config_file', type=str,
help="configuration file to migrate")
argparser.add_argument('--force', action='store_true',
help="Force calling of all migration scripts.")
argparser.add_argument('--set-vintage', type=str,
choices=['vyatta', 'vyos'],
help="Set the format for the config version footer in config"
" file:\n"
"set to 'vyatta':\n"
"(for '/* === vyatta-config-version ... */' format)\n"
"or 'vyos':\n"
"(for '// vyos-config-version ...' format).")
argparser.add_argument('--virtual', action='store_true',
help="Update the format of the trailing comments in"
" config file,\nfrom 'vyatta' to 'vyos'; no migration"
" scripts are run.")
args = argparser.parse_args()
config_file_name = args.config_file
force_on = args.force
vintage = args.set_vintage
virtual = args.virtual
if not os.access(config_file_name, os.R_OK):
print("Read error: {}.".format(config_file_name))
sys.exit(1)
if not os.access(config_file_name, os.W_OK):
print("Write error: {}.".format(config_file_name))
sys.exit(1)
separator = "."
backup_file_name = separator.join([config_file_name,
'{0:%Y-%m-%d-%H%M%S}'.format(datetime.datetime.now()),
'pre-migration'])
cmd(f'cp -p {config_file_name} {backup_file_name}')
if not virtual:
virtual_migration = VirtualMigrator(config_file_name)
virtual_migration.run()
migration = Migrator(config_file_name, force=force_on)
migration.run()
if not migration.config_changed():
os.remove(backup_file_name)
else:
virtual_migration = VirtualMigrator(config_file_name,
set_vintage=vintage)
virtual_migration.run()
if not virtual_migration.config_changed():
os.remove(backup_file_name)
if __name__ == '__main__':
main()

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