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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 jinja2 import FileSystemLoader, Environment
from pwd import getpwnam
from socket import gethostname
from sys import exit
from urllib3 import PoolManager
from vyos.config import Config
from vyos.defaults import directories as vyos_data_dir
from vyos import ConfigError
from vyos.util import call
config_file = r'/etc/salt/minion'
default_config_data = {
'hash_type': 'sha256',
'log_file': '/var/log/salt/minion',
'log_level': 'warning',
'master' : 'salt',
'user': 'minion',
'salt_id': gethostname(),
'mine_interval': '60',
'verify_master_pubkey_sign': 'false'
}
def get_config():
salt = deepcopy(default_config_data)
conf = Config()
if not conf.exists('service salt-minion'):
return None
else:
conf.set_level('service salt-minion')
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'):
master = conf.return_values('master')
salt['master'] = 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')
salt['master-key'] = None
if conf.exists('master-key'):
salt['master-key'] = conf.return_value('master-key')
salt['verify_master_pubkey_sign'] = 'true'
return salt
def generate(salt):
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 salt is None:
return None
# Prepare Jinja2 template loader from files
tmpl_path = os.path.join(vyos_data_dir['data'], 'templates', 'salt-minion')
fs_loader = FileSystemLoader(tmpl_path)
env = Environment(loader=fs_loader)
if not os.path.exists(directory):
os.makedirs(directory)
tmpl = env.get_template('minion.tmpl')
config_text = tmpl.render(salt)
with open(config_file, 'w') as f:
f.write(config_text)
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("sudo systemctl restart salt-minion")
else:
# Salt access is removed in the commit
call("sudo systemctl stop salt-minion")
os.unlink(config_file)
return None
if __name__ == '__main__':
try:
c = get_config()
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)

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