OpenStack Orchestration (Heat) Agents
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#!/usr/bin/env python
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import json
import logging
import os
import subprocess
import sys
HIERA_DATADIR = os.environ.get('HEAT_PUPPET_HIERA_DATADIR',
'/etc/puppet/hieradata')
HIERA_CONFIG = os.environ.get('HEAT_HIERA_CONFIG', '/etc/puppet/hiera.yaml')
HIERA_ELEMENT_CHECK_CMD = os.environ.get('HEAT_HIERA_ELEMENT_CHECK_CMD',
'os-apply-config '
'--key hiera.datafiles '
'--type raw --key-default empty')
HIERA_CONFIG_BASE = """
---
:backends:
- json
:json:
:datadir: %(datadir)s
:hierarchy:
""" % {'datadir': HIERA_DATADIR}
def prepare_dir(path):
if not os.path.isdir(path):
os.makedirs(path, 0o700)
def exit_legacy_hiera_detected():
try:
subproc = subprocess.Popen(HIERA_ELEMENT_CHECK_CMD.split(" "),
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
stdout, stderr = subproc.communicate()
rs_stdout = stdout.rstrip().decode('utf-8', 'replace')
if rs_stdout != 'empty':
err_msg = ('Legacy hieradata from os-apply-config has been '
'detected - %s. Please update all of your interfaces '
'to use the new heat-agents hiera hook before '
'proceeding' % rs_stdout)
response = {
'deploy_stdout': stdout,
'deploy_stderr': err_msg,
'deploy_status_code': 1,
}
json.dump(response, sys.stdout)
sys.exit(0)
except OSError:
# os-apply-config is not installed? Assume there is no legacy data.
pass
def main(argv=sys.argv):
log = logging.getLogger('heat-config')
handler = logging.StreamHandler(sys.stderr)
handler.setFormatter(
logging.Formatter(
'[%(asctime)s] (%(name)s) [%(levelname)s] %(message)s'))
log.addHandler(handler)
log.setLevel('DEBUG')
c = json.load(sys.stdin)['config']
exit_legacy_hiera_detected()
prepare_dir(HIERA_DATADIR)
hiera_config_file = os.path.join(HIERA_CONFIG)
# allow the end user to order the hiera config as they wish
if 'hierarchy' in c:
with os.fdopen(os.open(hiera_config_file,
os.O_CREAT | os.O_TRUNC | os.O_WRONLY, 0o600),
'w') as config_file:
config_file.write(HIERA_CONFIG_BASE)
for item in c['hierarchy']:
config_file.write(' - %s\n' % item)
# write out the datafiles as YAML
if 'datafiles' in c:
for name, data in c['datafiles'].items():
hiera_data = os.path.join(HIERA_DATADIR, '%s.json' % name)
with os.fdopen(os.open(hiera_data,
os.O_CREAT | os.O_TRUNC | os.O_WRONLY,
0o600),
'w') as hiera_data_file:
json.dump(data, hiera_data_file, indent=4, sort_keys=True,
separators=(',', ': '))
response = {
'deploy_stdout': '',
'deploy_stderr': '',
'deploy_status_code': 0,
}
json.dump(response, sys.stdout)
if __name__ == '__main__':
sys.exit(main(sys.argv))