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vyos-load-config.py
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vyos-load-config.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#
"""Load config file from within config session.
Config file specified by URI or path (without scheme prefix).
Example: load https://somewhere.net/some.config
or
load /tmp/some.config
"""
import os
import sys
import gzip
import tempfile
import vyos.defaults
import vyos.remote
from vyos.configsource import ConfigSourceSession, VyOSError
from vyos.migrator import Migrator, VirtualMigrator, MigratorError
class LoadConfig(ConfigSourceSession):
"""A subclass for calling 'loadFile'.
This does not belong in configsource.py, and only has a single caller.
"""
def load_config(self, path):
return self._run(['/bin/cli-shell-api','loadFile',path])
file_name = sys.argv[1] if len(sys.argv) > 1 else 'config.boot'
configdir = vyos.defaults.directories['config']
protocols = ['scp', 'sftp', 'http', 'https', 'ftp', 'tftp']
def get_local_config(filename):
if os.path.isfile(filename):
fname = filename
elif os.path.isfile(os.path.join(configdir, filename)):
fname = os.path.join(configdir, filename)
else:
sys.exit(f"No such file '{filename}'")
if fname.endswith('.gz'):
with gzip.open(fname, 'rb') as f:
try:
config_str = f.read().decode()
except OSError as e:
sys.exit(e)
else:
with open(fname, 'r') as f:
try:
config_str = f.read()
except OSError as e:
sys.exit(e)
return config_str
if any(x in file_name for x in protocols):
config_string = vyos.remote.get_remote_config(file_name)
if not config_string:
sys.exit(f"No such config file at '{file_name}'")
else:
config_string = get_local_config(file_name)
config = LoadConfig()
print(f"Loading configuration from '{file_name}'")
with tempfile.NamedTemporaryFile() as fp:
with open(fp.name, 'w') as fd:
fd.write(config_string)
virtual_migration = VirtualMigrator(fp.name)
try:
virtual_migration.run()
except MigratorError as err:
sys.exit('{}'.format(err))
migration = Migrator(fp.name)
try:
migration.run()
except MigratorError as err:
sys.exit('{}'.format(err))
try:
config.load_config(fp.name)
except VyOSError as err:
sys.exit('{}'.format(err))
if config.session_changed():
print("Load complete. Use 'commit' to make changes effective.")
else:
print("No configuration changes to commit.")

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