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#!/usr/bin/env python |
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import argparse |
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import base64 |
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import httplib |
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try: |
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import simplejson as json |
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except ImportError: |
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import json |
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import os |
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import sys |
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import traceback |
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from urlparse import urljoin |
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try: |
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import requests |
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requests.packages.urllib3.disable_warnings() |
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except ImportError: |
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raise ImportError('Missing dependency "requests". \ |
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Do ``pip install requests``.') |
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try: |
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import yaml |
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except ImportError: |
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raise ImportError('Missing dependency "pyyaml". \ |
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Do ``pip install pyyaml``.') |
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# ST2 configuration |
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ST2_API_BASE_URL = 'https://localhost/api/v1/' |
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ST2_AUTH_BASE_URL = 'https://localhost/auth/v1/' |
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ST2_USERNAME = None |
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ST2_PASSWORD = None |
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ST2_API_KEY = None |
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ST2_AUTH_TOKEN = None |
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ST2_SSL_VERIFY = False |
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ST2_AUTH_PATH = 'tokens' |
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ST2_WEBHOOKS_PATH = 'webhooks/st2' |
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ST2_TRIGGERS_PATH = 'triggertypes' |
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ST2_TRIGGERTYPE_PACK = 'sensu' |
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ST2_TRIGGERTYPE_NAME = 'event_handler' |
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ST2_TRIGGERTYPE_REF = '.'.join([ST2_TRIGGERTYPE_PACK, ST2_TRIGGERTYPE_NAME]) |
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# Sensu configuration |
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SENSU_HOST = 'localhost' |
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SENSU_PORT = 4567 |
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SENSU_USER = '' |
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SENSU_PASS = '' |
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REGISTERED_WITH_ST2 = False |
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UNAUTHED = False |
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IS_API_KEY_AUTH = False |
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OK_CODES = [httplib.OK, httplib.CREATED, httplib.ACCEPTED, httplib.CONFLICT] |
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UNREACHABLE_CODES = [httplib.NOT_FOUND] |
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TOKEN_AUTH_HEADER = 'X-Auth-Token' |
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API_KEY_AUTH_HEADER = 'St2-Api-Key' |
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def _get_sensu_request_headers(): |
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b64auth = base64.b64encode( |
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"%s:%s" % |
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(SENSU_USER, SENSU_PASS)) |
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auth_header = "BASIC %s" % b64auth |
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content_header = "application/json" |
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return {"Authorization": auth_header, "Content-Type": content_header} |
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def _check_stash(client, check, verbose=False): |
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sensu_api = "http://%s:%i" % (SENSU_HOST, SENSU_PORT) |
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endpoints = [ |
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"silence/%s" % client, |
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"silence/%s/%s" % (client, check), |
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"silence/all/%s" % check] |
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for endpoint in endpoints: |
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url = "%s/stashes/%s" % (sensu_api, endpoint) |
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if verbose: |
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print('Getting sensu stash info from URL: %s' % url) |
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try: |
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response = requests.get(url, headers=_get_sensu_request_headers()) |
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except requests.exceptions.ConnectionError: |
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traceback.print_exc(limit=20) |
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msg = 'Couldn\'t connect to sensu to get stash info. Is sensu running on %s:%s?' % ( |
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SENSU_HOST, SENSU_PORT |
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) |
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raise Exception(msg) |
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if verbose: |
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print('Sensu response code: %s.' % response.status_code) |
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if response.status_code == 200: |
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print("Check or client is stashed") |
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sys.exit(0) |
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def _get_st2_request_headers(): |
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headers = {} |
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if not UNAUTHED: |
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if IS_API_KEY_AUTH: |
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headers[API_KEY_AUTH_HEADER] = ST2_API_KEY |
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else: |
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if ST2_AUTH_TOKEN: |
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headers[TOKEN_AUTH_HEADER] = ST2_AUTH_TOKEN |
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else: |
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pass |
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return headers |
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def _create_trigger_type(verbose=False): |
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try: |
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url = _get_st2_triggers_base_url() |
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payload = { |
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'name': ST2_TRIGGERTYPE_NAME, |
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'pack': ST2_TRIGGERTYPE_PACK, |
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'description': 'Trigger type for sensu event handler.' |
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} |
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headers = _get_st2_request_headers() |
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headers['Content-Type'] = 'application/json; charset=utf-8' |
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if verbose: |
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print('POST to URL %s for registering trigger. Body = %s, headers = %s.' % |
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(url, payload, headers)) |
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post_resp = requests.post(url, data=json.dumps(payload), |
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headers=headers, verify=ST2_SSL_VERIFY) |
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except: |
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traceback.print_exc(limit=20) |
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raise Exception('Unable to connect to st2 endpoint %s.' % url) |
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else: |
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status = post_resp.status_code |
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if status in UNREACHABLE_CODES: |
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msg = 'Got response %s. Invalid triggers endpoint %s. Check configuration!' % ( |
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status, |
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url |
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) |
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raise Exception(msg) |
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if status not in OK_CODES: |
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msg = 'Failed to register trigger type %s.%s with st2. HTTP_CODE: %s' % ( |
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ST2_TRIGGERTYPE_PACK, ST2_TRIGGERTYPE_NAME, status |
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) |
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raise Exception(msg) |
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else: |
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print('Registered trigger type with st2.') |
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def _get_auth_url(): |
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return urljoin(ST2_AUTH_BASE_URL, ST2_AUTH_PATH) |
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def _get_auth_token(verbose=False): |
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auth_url = _get_auth_url() |
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if verbose: |
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print('Will POST to URL %s to get auth token.' % auth_url) |
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try: |
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resp = requests.post(auth_url, json.dumps({'ttl': 5 * 60}), |
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auth=(ST2_USERNAME, ST2_PASSWORD), verify=ST2_SSL_VERIFY) |
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except: |
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traceback.print_exc(limit=20) |
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raise Exception('Unable to connect to st2 endpoint %s.' % auth_url) |
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else: |
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if resp.status_code in UNREACHABLE_CODES: |
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msg = 'Got response %s. Invalid auth endpoint %s. Check configuration!' % ( |
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resp.status_code, |
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auth_url |
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) |
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raise Exception(msg) |
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if resp.status_code not in OK_CODES: |
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msg = 'Cannot get a valid auth token from %s. HTTP_CODE: %s' % ( |
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auth_url, |
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resp.status_code |
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) |
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raise Exception(msg) |
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return resp.json()['token'] |
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def _register_trigger_with_st2(verbose=False): |
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triggers_url = _get_st2_triggers_url() |
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try: |
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headers = _get_st2_request_headers() |
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if verbose: |
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print('Will GET from URL %s for detecting trigger %s.' % ( |
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triggers_url, ST2_TRIGGERTYPE_REF)) |
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print('Request headers: %s' % headers) |
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get_resp = requests.get(triggers_url, headers=headers, verify=ST2_SSL_VERIFY) |
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if get_resp.status_code != httplib.OK: |
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_create_trigger_type(verbose=verbose) |
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else: |
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body = json.loads(get_resp.text) |
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if len(body) == 0: |
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_create_trigger_type(verbose=verbose) |
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except: |
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traceback.print_exc(limit=20) |
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raise Exception('Unable to connect to st2 endpoint %s.' % triggers_url) |
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else: |
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if verbose: |
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print('Successfully registered trigger %s with st2.' % ST2_TRIGGERTYPE_REF) |
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def _get_st2_triggers_base_url(): |
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url = urljoin(ST2_API_BASE_URL, ST2_TRIGGERS_PATH) |
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return url |
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def _get_st2_triggers_url(): |
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url = urljoin(_get_st2_triggers_base_url() + '/', ST2_TRIGGERTYPE_REF) |
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return url |
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def _get_st2_webhooks_url(): |
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url = urljoin(ST2_API_BASE_URL, ST2_WEBHOOKS_PATH) |
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return url |
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def _post_webhook(url, body, verbose=False): |
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headers = _get_st2_request_headers() |
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headers['X-ST2-Integration'] = 'sensu.' |
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headers['St2-Trace-Tag'] = body['payload']['id'] |
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headers['Content-Type'] = 'application/json; charset=utf-8' |
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try: |
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if verbose: |
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print('Webhook POST: url: %s, headers: %s, body: %s\n' % (url, headers, body)) |
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r = requests.post(url, data=json.dumps(body), headers=headers, verify=False) |
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except: |
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raise Exception('Cannot connect to st2 endpoint %s.' % url) |
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else: |
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status = r.status_code |
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if status in UNREACHABLE_CODES: |
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msg = 'Webhook URL %s does not exist. Check StackStorm installation!' |
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raise Exception(msg) |
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if status not in OK_CODES: |
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sys.stderr.write('Failed posting sensu event to st2. HTTP_CODE: \ |
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%d\n' % status) |
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else: |
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sys.stdout.write('Sent sensu event to st2. HTTP_CODE: \ |
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%d\n' % status) |
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253
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254
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def _post_event_to_st2(payload, verbose=False): |
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body = {} |
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body['trigger'] = ST2_TRIGGERTYPE_REF |
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try: |
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body['payload'] = json.loads(payload) |
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except: |
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print('Invalid JSON payload %s.' % payload) |
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sys.exit(3) |
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264
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try: |
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client = body['payload']['client']['name'] |
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check = body['payload']['check']['name'] |
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except KeyError: |
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print('Invalid payload spec %s.' % payload) |
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270
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if not _check_stash(client, check, verbose=verbose): |
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try: |
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_post_webhook(url=_get_st2_webhooks_url(), body=body, verbose=verbose) |
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return True |
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except: |
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traceback.print_exc(limit=20) |
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print('Cannot send event to st2.') |
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sys.exit(4) |
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return False |
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280
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281
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def _register_with_st2(verbose=False): |
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global REGISTERED_WITH_ST2 |
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283
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try: |
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if not REGISTERED_WITH_ST2: |
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285
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if verbose: |
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286
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print('Checking if trigger %s registered with st2.' % ST2_TRIGGERTYPE_REF) |
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287
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_register_trigger_with_st2(verbose=verbose) |
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288
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REGISTERED_WITH_ST2 = True |
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289
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except: |
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290
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traceback.print_exc(limit=20) |
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291
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sys.stderr.write( |
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'Failed registering with st2. Won\'t post event.\n') |
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293
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sys.exit(2) |
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294
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295
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296
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def _set_config_opts(config_file, verbose=False, unauthed=False, ssl_verify=False): |
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297
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global ST2_USERNAME |
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298
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global ST2_PASSWORD |
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299
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global ST2_API_KEY |
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300
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global ST2_AUTH_TOKEN |
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301
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global ST2_API_BASE_URL |
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302
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global ST2_API_BASE_URL |
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303
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global ST2_AUTH_BASE_URL |
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304
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global ST2_SSL_VERIFY |
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305
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global SENSU_HOST |
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306
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global SENSU_PORT |
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307
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global SENSU_USER |
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308
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global SENSU_PASS |
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309
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global UNAUTHED |
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310
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global IS_API_KEY_AUTH |
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311
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312
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UNAUTHED = unauthed |
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313
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ST2_SSL_VERIFY = ssl_verify |
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314
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|
315
|
|
|
if not os.path.exists(config_file): |
|
316
|
|
|
print('Configuration file %s not found. Exiting!!!' % config_file) |
|
317
|
|
|
sys.exit(1) |
|
318
|
|
|
|
|
319
|
|
|
with open(config_file) as f: |
|
320
|
|
|
config = yaml.safe_load(f) |
|
321
|
|
|
|
|
322
|
|
|
if verbose: |
|
323
|
|
|
print('Contents of config file: %s' % config) |
|
324
|
|
|
|
|
325
|
|
|
ST2_USERNAME = config['st2_username'] |
|
326
|
|
|
ST2_PASSWORD = config['st2_password'] |
|
327
|
|
|
ST2_API_KEY = config['st2_api_key'] |
|
328
|
|
|
ST2_API_BASE_URL = config['st2_api_base_url'] |
|
329
|
|
|
if not ST2_API_BASE_URL.endswith('/'): |
|
330
|
|
|
ST2_API_BASE_URL += '/' |
|
331
|
|
|
ST2_AUTH_BASE_URL = config['st2_auth_base_url'] |
|
332
|
|
|
if not ST2_AUTH_BASE_URL.endswith('/'): |
|
333
|
|
|
ST2_AUTH_BASE_URL += '/' |
|
334
|
|
|
SENSU_HOST = config.get('sensu_host', 'localhost') |
|
335
|
|
|
SENSU_PORT = config.get('sensu_port', '4567') |
|
336
|
|
|
SENSU_USER = config.get('sensu_user', None) |
|
337
|
|
|
SENSU_PASS = config.get('sensu_pass', None) |
|
338
|
|
|
|
|
339
|
|
|
if ST2_API_KEY: |
|
340
|
|
|
IS_API_KEY_AUTH = True |
|
341
|
|
|
|
|
342
|
|
|
if verbose: |
|
343
|
|
|
print('Unauthed? : %s' % UNAUTHED) |
|
344
|
|
|
print('API key auth?: %s' % IS_API_KEY_AUTH) |
|
345
|
|
|
print('SSL_VERIFY? : %s' % ST2_SSL_VERIFY) |
|
346
|
|
|
|
|
347
|
|
|
if not UNAUTHED and not IS_API_KEY_AUTH: |
|
348
|
|
|
try: |
|
349
|
|
|
if not ST2_AUTH_TOKEN: |
|
350
|
|
|
if verbose: |
|
351
|
|
|
print('No auth token found. Let\'s get one from StackStorm!') |
|
352
|
|
|
ST2_AUTH_TOKEN = _get_auth_token(verbose=verbose) |
|
353
|
|
|
except: |
|
354
|
|
|
traceback.print_exc(limit=20) |
|
355
|
|
|
print('Unable to negotiate an auth token. Exiting!') |
|
356
|
|
|
sys.exit(1) |
|
357
|
|
|
|
|
358
|
|
|
|
|
359
|
|
|
def main(config_file, payload, verbose=False, unauthed=False, ssl_verify=False): |
|
360
|
|
|
_set_config_opts(config_file=config_file, unauthed=unauthed, verbose=verbose, |
|
361
|
|
|
ssl_verify=ssl_verify) |
|
362
|
|
|
_register_with_st2(verbose=verbose) |
|
363
|
|
|
_post_event_to_st2(payload, verbose=verbose) |
|
364
|
|
|
|
|
365
|
|
|
|
|
366
|
|
|
if __name__ == '__main__': |
|
367
|
|
|
parser = argparse.ArgumentParser(description='StackStorm sensu event handler.') |
|
368
|
|
|
parser.add_argument('config_path', |
|
369
|
|
|
help='Exchange to listen on') |
|
370
|
|
|
parser.add_argument('--verbose', '-v', required=False, action='store_true', |
|
371
|
|
|
help='Verbose mode.') |
|
372
|
|
|
parser.add_argument('--unauthed', '-u', required=False, action='store_true', |
|
373
|
|
|
help='Allow to post to unauthed st2. E.g. when auth is disabled ' + |
|
374
|
|
|
'server side.') |
|
375
|
|
|
parser.add_argument('--ssl-verify', '-k', required=False, action='store_true', |
|
376
|
|
|
help='Turn on SSL verification for st2 APIs.') |
|
377
|
|
|
args = parser.parse_args() |
|
378
|
|
|
payload = sys.stdin.read().strip() |
|
379
|
|
|
main(config_file=args.config_path, payload=payload, verbose=args.verbose, |
|
380
|
|
|
unauthed=args.unauthed, ssl_verify=args.ssl_verify) |
|
381
|
|
|
|