diff --git a/heartbeat/gcp-vpc-move-vip.in b/heartbeat/gcp-vpc-move-vip.in index a90c2de8d..9fc87242f 100755 --- a/heartbeat/gcp-vpc-move-vip.in +++ b/heartbeat/gcp-vpc-move-vip.in @@ -1,336 +1,337 @@ -#!/usr/bin/env python +#!@PYTHON@ -tt # --------------------------------------------------------------------- # Copyright 2016 Google Inc. # # 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. # --------------------------------------------------------------------- # Description: Google Cloud Platform - Floating IP Address (Alias) # --------------------------------------------------------------------- import json import logging import os import sys import time try: import googleapiclient.discovery except ImportError: pass if sys.version_info >= (3, 0): # Python 3 imports. import urllib.parse as urlparse import urllib.request as urlrequest else: # Python 2 imports. import urllib as urlparse import urllib2 as urlrequest CONN = None THIS_VM = None ALIAS = None OCF_SUCCESS = 0 OCF_ERR_GENERIC = 1 OCF_ERR_CONFIGURED = 6 OCF_NOT_RUNNING = 7 METADATA_SERVER = 'http://metadata.google.internal/computeMetadata/v1/' METADATA_HEADERS = {'Metadata-Flavor': 'Google'} METADATA = \ ''' 1.0 Floating IP Address on Google Cloud Platform - Using Alias IP address functionality to attach a secondary IP address to a running instance Floating IP Address on Google Cloud Platform List of hosts in the cluster Host list - + If enabled (set to true), IP failover logs will be posted to stackdriver logging Stackdriver-logging support IP Address to be added including CIDR. E.g 192.168.0.1/32 IP Address to be added including CIDR. E.g 192.168.0.1/32 Subnet name for the Alias IP2 Subnet name for the Alias IP + ''' def get_metadata(metadata_key, params=None, timeout=None): """Performs a GET request with the metadata headers. Args: metadata_key: string, the metadata to perform a GET request on. params: dictionary, the query parameters in the GET request. timeout: int, timeout in seconds for metadata requests. Returns: HTTP response from the GET request. Raises: urlerror.HTTPError: raises when the GET request fails. """ timeout = timeout or 60 metadata_url = os.path.join(METADATA_SERVER, metadata_key) params = urlparse.urlencode(params or {}) url = '%s?%s' % (metadata_url, params) request = urlrequest.Request(url, headers=METADATA_HEADERS) request_opener = urlrequest.build_opener(urlrequest.ProxyHandler({})) return request_opener.open(request, timeout=timeout * 1.1).read() def get_instance(project, zone, instance): request = CONN.instances().get( project=project, zone=zone, instance=instance) return request.execute() def get_network_ifaces(project, zone, instance): return get_instance(project, zone, instance)['networkInterfaces'] def wait_for_operation(project, zone, operation): while True: result = CONN.zoneOperations().get( project=project, zone=zone, operation=operation['name']).execute() if result['status'] == 'DONE': if 'error' in result: raise Exception(result['error']) return time.sleep(1) def set_alias(project, zone, instance, alias, alias_range_name=None): fingerprint = get_network_ifaces(project, zone, instance)[0]['fingerprint'] body = { 'aliasIpRanges': [], 'fingerprint': fingerprint } if alias: obj = {'ipCidrRange': alias} if alias_range_name: obj['subnetworkRangeName'] = alias_range_name body['aliasIpRanges'].append(obj) request = CONN.instances().updateNetworkInterface( instance=instance, networkInterface='nic0', project=project, zone=zone, body=body) operation = request.execute() wait_for_operation(project, zone, operation) def get_alias(project, zone, instance): iface = get_network_ifaces(project, zone, instance) try: return iface[0]['aliasIpRanges'][0]['ipCidrRange'] except KeyError: return '' def get_localhost_alias(): net_iface = get_metadata('instance/network-interfaces', {'recursive': True}) net_iface = json.loads(net_iface.decode('utf-8')) try: return net_iface[0]['ipAliases'][0] except (KeyError, IndexError): return '' def get_zone(project, instance): request = CONN.instances().aggregatedList(project=project) while request is not None: response = request.execute() zones = response.get('items', {}) for zone in zones.values(): for inst in zone.get('instances', []): if inst['name'] == instance: return inst['zone'].split("/")[-1] request = CONN.instances().aggregatedList_next( previous_request=request, previous_response=response) raise Exception("Unable to find instance %s" % (instance)) def get_instances_list(project, exclude): hostlist = [] request = CONN.instances().aggregatedList(project=project) while request is not None: response = request.execute() zones = response.get('items', {}) for zone in zones.values(): for inst in zone.get('instances', []): if inst['name'] != exclude: hostlist.append(inst['name']) request = CONN.instances().aggregatedList_next( previous_request=request, previous_response=response) return hostlist def gcp_alias_start(alias): my_alias = get_localhost_alias() my_zone = get_metadata('instance/zone').split('/')[-1] project = get_metadata('project/project-id') # If I already have the IP, exit. If it has an alias IP that isn't the VIP, # then remove it if my_alias == alias: logging.info( '%s already has %s attached. No action required' % (THIS_VM, alias)) sys.exit(OCF_SUCCESS) elif my_alias: logging.info('Removing %s from %s' % (my_alias, THIS_VM)) set_alias(project, my_zone, THIS_VM, '') # Loops through all hosts & remove the alias IP from the host that has it hostlist = os.environ.get('OCF_RESKEY_hostlist', '') if hostlist: hostlist = hostlist.replace(THIS_VM, '').split() else: hostlist = get_instances_list(project, THIS_VM) for host in hostlist: host_zone = get_zone(project, host) host_alias = get_alias(project, host_zone, host) if alias == host_alias: logging.info( '%s is attached to %s - Removing all alias IP addresses from %s' % (alias, host, host)) set_alias(project, host_zone, host, '') break # add alias IP to localhost set_alias( project, my_zone, THIS_VM, alias, os.environ.get('OCF_RESKEY_alias_range_name')) # Check the IP has been added my_alias = get_localhost_alias() if alias == my_alias: logging.info('Finished adding %s to %s' % (alias, THIS_VM)) elif my_alias: logging.error( 'Failed to add IP. %s has an IP attached but it isn\'t %s' % (THIS_VM, alias)) sys.exit(OCF_ERR_GENERIC) else: logging.error('Failed to add IP address %s to %s' % (alias, THIS_VM)) sys.exit(OCF_ERR_GENERIC) def gcp_alias_stop(alias): my_alias = get_localhost_alias() my_zone = get_metadata('instance/zone').split('/')[-1] project = get_metadata('project/project-id') if my_alias == alias: logging.info('Removing %s from %s' % (my_alias, THIS_VM)) set_alias(project, my_zone, THIS_VM, '') def gcp_alias_status(alias): my_alias = get_localhost_alias() if alias == my_alias: logging.info('%s has the correct IP address attached' % THIS_VM) else: sys.exit(OCF_NOT_RUNNING) def validate(): global ALIAS global CONN global THIS_VM # Populate global vars try: CONN = googleapiclient.discovery.build('compute', 'v1') except Exception as e: logging.error('Couldn\'t connect with google api: ' + str(e)) sys.exit(OCF_ERR_CONFIGURED) try: THIS_VM = get_metadata('instance/name') except Exception as e: logging.error('Couldn\'t get instance name, is this running inside GCE?: ' + str(e)) sys.exit(OCF_ERR_CONFIGURED) ALIAS = os.environ.get('OCF_RESKEY_alias_ip') if not ALIAS: logging.error('Missing alias_ip parameter') sys.exit(OCF_ERR_CONFIGURED) def configure_logs(): # Prepare logging logging.basicConfig( format='gcp:alias - %(levelname)s - %(message)s', level=logging.INFO) logging.getLogger('googleapiclient').setLevel(logging.WARN) logging_env = os.environ.get('OCF_RESKEY_stackdriver_logging') if logging_env: logging_env = logging_env.lower() if any(x in logging_env for x in ['yes', 'true', 'enabled']): try: import google.cloud.logging.handlers client = google.cloud.logging.Client() handler = google.cloud.logging.handlers.CloudLoggingHandler( client, name=THIS_VM) handler.setLevel(logging.INFO) formatter = logging.Formatter('gcp:alias "%(message)s"') handler.setFormatter(formatter) root_logger = logging.getLogger() root_logger.addHandler(handler) except ImportError: logging.error('Couldn\'t import google.cloud.logging, ' 'disabling Stackdriver-logging support') def main(): if 'meta-data' in sys.argv[1]: print(METADATA) return validate() if 'validate-all' in sys.argv[1]: return configure_logs() if 'start' in sys.argv[1]: gcp_alias_start(ALIAS) elif 'stop' in sys.argv[1]: gcp_alias_stop(ALIAS) elif 'status' in sys.argv[1] or 'monitor' in sys.argv[1]: gcp_alias_status(ALIAS) else: logging.error('no such function %s' % str(sys.argv[1])) if __name__ == "__main__": main()