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salt-minion.py
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salt-minion.py
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#!/usr/bin/env python3
#
# Copyright (C) 2018-2020 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/>.
import os
from copy import deepcopy
from socket import gethostname
from sys import exit
from urllib3 import PoolManager
from vyos.config import Config
from vyos.template import render
from vyos.util import call, chown
from vyos import ConfigError
from vyos import airbag
airbag.enable()
config_file = r'/etc/salt/minion'
master_keyfile = r'/opt/vyatta/etc/config/salt/pki/minion/master_sign.pub'
default_config_data = {
'hash': 'sha256',
'log_level': 'warning',
'master' : 'salt',
'user': 'minion',
'group': 'vyattacfg',
'salt_id': gethostname(),
'mine_interval': '60',
'verify_master_pubkey_sign': 'false',
'master_key': ''
}
def get_config(config=None):
salt = deepcopy(default_config_data)
if config:
conf = config
else:
conf = Config()
base = ['service', 'salt-minion']
if not conf.exists(base):
return None
else:
conf.set_level(base)
if conf.exists(['hash']):
salt['hash'] = conf.return_value(['hash'])
if conf.exists(['master']):
salt['master'] = conf.return_values(['master'])
if conf.exists(['id']):
salt['salt_id'] = conf.return_value(['id'])
if conf.exists(['user']):
salt['user'] = conf.return_value(['user'])
if conf.exists(['interval']):
salt['interval'] = conf.return_value(['interval'])
if conf.exists(['master-key']):
salt['master_key'] = conf.return_value(['master-key'])
salt['verify_master_pubkey_sign'] = 'true'
return salt
def verify(salt):
return None
def generate(salt):
if not salt:
return None
render(config_file, 'salt-minion/minion.tmpl', salt,
user=salt['user'], group=salt['group'])
if not os.path.exists(master_keyfile):
if salt['master_key']:
req = PoolManager().request('GET', salt['master_key'], preload_content=False)
with open(master_keyfile, 'wb') as f:
while True:
data = req.read(1024)
if not data:
break
f.write(data)
req.release_conn()
chown(master_keyfile, salt['user'], salt['group'])
return None
def apply(salt):
if not salt:
# Salt removed from running config
call('systemctl stop salt-minion.service')
if os.path.exists(config_file):
os.unlink(config_file)
else:
call('systemctl restart salt-minion.service')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)

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