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#!/usr/bin/env python
# ============LICENSE_START==========================================
# ===================================================================
# Copyright © 2017 AT&T
#
# 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.
#============LICENSE_END============================================
#This script will be execute on master host. This script will check whether Kube-DNS is running, and set secrets in cloudify.
import os
import subprocess
import pip
try:
import yaml
except ImportError:
pip.main(['install', 'pyyaml'])
import yaml
from cloudify import ctx
from cloudify.exceptions import RecoverableError
from cloudify import manager
def execute_command(_command):
ctx.logger.debug('_command {0}.'.format(_command))
subprocess_args = {
'args': _command.split(),
'stdout': subprocess.PIPE,
'stderr': subprocess.PIPE
}
ctx.logger.debug('subprocess_args {0}.'.format(subprocess_args))
process = subprocess.Popen(**subprocess_args)
output, error = process.communicate()
ctx.logger.debug('command: {0} '.format(_command))
ctx.logger.debug('output: {0} '.format(output))
ctx.logger.debug('error: {0} '.format(error))
ctx.logger.debug('process.returncode: {0} '.format(process.returncode))
if process.returncode:
ctx.logger.error('Running `{0}` returns error.'.format(_command))
return False
return output
def check_kubedns_status(_get_pods):
ctx.logger.debug('get_pods: {0} '.format(_get_pods))
for pod_line in _get_pods.split('\n'):
ctx.logger.debug('pod_line: {0} '.format(pod_line))
try:
_namespace, _name, _ready, _status, _restarts, _age = pod_line.split()
except ValueError:
pass
else:
if 'kube-dns' in _name and 'Running' not in _status:
return False
elif 'kube-dns' in _name and 'Running' in _status:
return True
return False
if __name__ == '__main__':
cfy_client = manager.get_rest_client()
# Checking if the Kubernetes DNS service is running (last step).
admin_file_dest = os.path.join(os.path.expanduser('~'), 'admin.conf')
os.environ['KUBECONFIG'] = admin_file_dest
get_pods = execute_command('kubectl get pods --all-namespaces')
if not check_kubedns_status(get_pods):
raise RecoverableError('kube-dns not Running')
# Storing the K master configuration.
kubernetes_master_config = {}
with open(admin_file_dest, 'r') as outfile:
try:
kubernetes_master_config = yaml.load(outfile)
except yaml.YAMLError as e:
RecoverableError(
'Unable to read Kubernetes Admin file: {0}: {1}'.format(
admin_file_dest, str(e)))
ctx.instance.runtime_properties['configuration_file_content'] = \
kubernetes_master_config
clusters = kubernetes_master_config.get('clusters')
_clusters = {}
for cluster in clusters:
__name = cluster.get('name')
_cluster = cluster.get('cluster', {})
_secret_key = '%s_certificate_authority_data' % __name
if cfy_client and not len(cfy_client.secrets.list(key=_secret_key)) == 1:
cfy_client.secrets.create(key=_secret_key, value=_cluster.get('certificate-authority-data'))
ctx.logger.info('Set secret: {0}.'.format(_secret_key))
else:
cfy_client.secrets.update(key=_secret_key, value=_cluster.get('certificate-authority-data'))
ctx.instance.runtime_properties['%s_certificate_authority_data' % __name] = _cluster.get('certificate-authority-data')
_clusters[__name] = _cluster
del __name
contexts = kubernetes_master_config.get('contexts')
_contexts = {}
for context in contexts:
__name = context.get('name')
_context = context.get('context', {})
_contexts[__name] = _context
del __name
users = kubernetes_master_config.get('users')
_users = {}
for user in users:
__name = user.get('name')
_user = user.get('user', {})
_secret_key = '%s_client_certificate_data' % __name
if cfy_client and not len(cfy_client.secrets.list(key=_secret_key)) == 1:
cfy_client.secrets.create(key=_secret_key, value=_user.get('client-certificate-data'))
ctx.logger.info('Set secret: {0}.'.format(_secret_key))
else:
cfy_client.secrets.update(key=_secret_key, value=_user.get('client-certificate-data'))
_secret_key = '%s_client_key_data' % __name
if cfy_client and not len(cfy_client.secrets.list(key=_secret_key)) == 1:
cfy_client.secrets.create(key=_secret_key, value=_user.get('client-key-data'))
ctx.logger.info('Set secret: {0}.'.format(_secret_key))
else:
cfy_client.secrets.update(key=_secret_key, value=_user.get('client-key-data'))
ctx.instance.runtime_properties['%s_client_certificate_data' % __name] = _user.get('client-certificate-data')
ctx.instance.runtime_properties['%s_client_key_data' % __name] = _user.get('client-key-data')
_users[__name] = _user
del __name
ctx.instance.runtime_properties['kubernetes'] = {
'clusters': _clusters,
'contexts': _contexts,
'users': _users
}
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