#
# 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.
from datetime import date
from freezer_dr.notifiers.common.driver import NotifierBaseDriver
import json
from oslo_log import log
import requests
from six.moves import urllib
import time
LOG = log.getLogger(__name__)
[docs]class SlackNotifier(NotifierBaseDriver):
MAX_CACHE_SIZE = 100
RESPONSE_OK = 'ok'
_raw_data_url_caches = []
def __init__(self, url, username, password, templates_dir, notify_from,
admin_list=None, **kwargs):
super(SlackNotifier, self).__init__(url, username, password,
templates_dir, notify_from,
admin_list, **kwargs)
LOG.info('Initializing SlackNotifier driver @ {0}'.format(url))
self.slack_timeout = kwargs.get('slack_timeout', '')
self.slack_ca_certs = kwargs.get('slack_ca_certs', '')
self.slack_insecured = kwargs.get('slack_insecured', 'True')
self.slack_proxy = kwargs.get('slack_proxy', '')
def _build_slack_message(self, node, status):
"""Builds slack message body
"""
body = {
'title': 'Host Evacuation status',
'host': node.get('host'),
'tenants': node.get('tenants'),
'instances': node.get('instances'),
'hypervisor': node.get('details'),
'evacuation_time': date.fromtimestamp(time.time()),
'status': status
}
slack_request = {}
slack_request['text'] = json.dumps(body, indent=3)
return slack_request
def _check_response(self, result):
if 'application/json' in result.headers.get('Content-Type'):
response = result.json()
if response.get(self.RESPONSE_OK):
return True
else:
LOG.error('Received an error message when trying to send to slack. error={}'
.format(response.get('error')))
return False
elif self.RESPONSE_OK == result.text:
return True
else:
LOG.error('Received an error message when trying to send to slack. error={}'
.format(result.text))
return False
def _send_message(self, request_options):
try:
url = request_options.get('url')
result = requests.post(**request_options)
if result.status_code not in range(200, 300):
LOG.error('Received an HTTP code {} when trying to post on URL {}.'
.format(result.status_code, url))
return False
# Slack returns 200 ok even if the token is invalid. Response has valid error message
if self._check_response(result):
LOG.info('Notification successfully posted.')
return True
LOG.error('Failed to send to slack on URL {}.'.format(url))
return False
except Exception as err:
LOG.error('Error trying to send to slack on URL {}. Detail: {}'
.format(url, err))
return False
[docs] def notify_status(self, node, status):
"""Notify the Host Evacuation status via slack
Posts on the given url
"""
slack_message = self._build_slack_message(node, status)
address = self.url
address = address.replace('#', '%23')
parsed_url = urllib.parse.urlsplit(address)
query_params = urllib.parse.parse_qs(parsed_url.query)
url = urllib.parse.urljoin(address, urllib.parse.urlparse(address).path)
verify = self.slack_ca_certs or not self.slack_insecured
proxy = self.slack_proxy
proxy_dict = None
if proxy is not None:
proxy_dict = {'https': proxy}
data_format_list = ['json', 'data']
if url in SlackNotifier._raw_data_url_caches:
data_format_list = ['data']
for data_format in data_format_list:
LOG.info('Trying to send message to {} as {}'
.format(url, data_format))
request_options = {
'url': url,
'verify': verify,
'params': query_params,
'proxies': proxy_dict,
'timeout': self.slack_timeout,
data_format: slack_message
}
if self._send_message(request_options):
if (data_format == 'data' and
url not in SlackNotifier._raw_data_url_caches and
len(SlackNotifier._raw_data_url_caches) < self.MAX_CACHE_SIZE):
SlackNotifier._raw_data_url_caches.append(url)
return True
LOG.info('Failed to send message to {} as {}'
.format(url, data_format))
return False
[docs] def notify(self, message):
pass
