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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 pwd import getpwnam
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
from vyos import ConfigError
config_file = r'/etc/salt/minion'
default_config_data = {
'hash_type': 'sha256',
'log_file': '/var/log/salt/minion',
'log_level': 'warning',
'master' : 'salt',
'user': 'nobody',
'salt_id': gethostname(),
'mine_interval': '60',
'verify_master_pubkey_sign': 'false'
}
def get_config():
salt = deepcopy(default_config_data)
conf = Config()
base = ['service', 'salt-minion']
if not conf.exists(base):
return None
else:
conf.set_level(base)
if conf.exists(['hash_type']):
salt['hash_type'] = conf.return_value(['hash_type'])
if conf.exists(['log_file']):
salt['log_file'] = conf.return_value(['log_file'])
if conf.exists(['log_level']):
salt['log_level'] = conf.return_value(['log_level'])
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(['mine_interval']):
salt['mine_interval'] = conf.return_value(['mine_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):
if not salt:
return None
if not salt['salt_id']:
raise ConfigError('Missing mandatory salt id!')
if not salt['master']:
raise ConfigError('Salt master must be defined!')
return None
def generate(salt):
if not salt:
return None
paths = ['/etc/salt/','/var/run/salt','/opt/vyatta/etc/config/salt/']
directory = '/opt/vyatta/etc/config/salt/pki/minion'
uid = getpwnam(salt['user']).pw_uid
http = PoolManager()
if not os.path.exists(directory):
os.makedirs(directory)
render(config_file, 'salt-minion/minion.tmpl', salt)
path = "/etc/salt/"
for path in paths:
for root, dirs, files in os.walk(path):
for usgr in dirs:
os.chown(os.path.join(root, usgr), uid, 100)
for usgr in files:
os.chown(os.path.join(root, usgr), uid, 100)
if not os.path.exists('/opt/vyatta/etc/config/salt/pki/minion/master_sign.pub'):
if not salt['master-key'] is None:
r = http.request('GET', salt['master-key'], preload_content=False)
with open('/opt/vyatta/etc/config/salt/pki/minion/master_sign.pub', 'wb') as out:
while True:
data = r.read(1024)
if not data:
break
out.write(data)
r.release_conn()
return None
def apply(salt):
if salt is not None:
call('systemctl restart salt-minion.service')
else:
# Salt access is removed in the commit
call('systemctl stop salt-minion.service')
os.unlink(config_file)
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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