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diff --git a/heartbeat/gcp-vpc-move-vip.in b/heartbeat/gcp-vpc-move-vip.in
index f3d117bda..a90c2de8d 100755
--- a/heartbeat/gcp-vpc-move-vip.in
+++ b/heartbeat/gcp-vpc-move-vip.in
@@ -1,315 +1,336 @@
#!/usr/bin/env python
# ---------------------------------------------------------------------
# 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
-import googleapiclient.discovery
+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 = \
'''<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="gcp-vpc-move-vip">
<version>1.0</version>
<longdesc lang="en">Floating IP Address on Google Cloud Platform - Using Alias IP address functionality to attach a secondary IP address to a running instance</longdesc>
<shortdesc lang="en">Floating IP Address on Google Cloud Platform</shortdesc>
<parameters>
<parameter name="hostlist" unique="1" required="0">
<longdesc lang="en">List of hosts in the cluster</longdesc>
<shortdesc lang="en">Host list</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="stackdriver-logging" unique="0" required="0">
<longdesc lang="en">If enabled (set to true), IP failover logs will be posted to stackdriver logging</longdesc>
<shortdesc lang="en">Stackdriver-logging support</shortdesc>
<content type="boolean" default="" />
</parameter>
<parameter name="alias_ip" unique="1" required="1">
<longdesc lang="en">IP Address to be added including CIDR. E.g 192.168.0.1/32</longdesc>
<shortdesc lang="en">IP Address to be added including CIDR. E.g 192.168.0.1/32</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="alias_range_name" unique="1" required="0">
<longdesc lang="en">Subnet name for the Alias IP2</longdesc>
<shortdesc lang="en">Subnet name for the Alias IP</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="300" />
<action name="stop" timeout="15" />
<action name="monitor" timeout="15" interval="60" depth="0" />
<action name="meta-data" timeout="15" />
</actions>
</resource-agent>'''
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.replace(THIS_VM, '').split()
+ 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 configure():
+def validate():
+ global ALIAS
global CONN
global THIS_VM
# Populate global vars
- CONN = googleapiclient.discovery.build('compute', 'v1')
- THIS_VM = get_metadata('instance/name')
+ 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
- alias = os.environ.get('OCF_RESKEY_alias_ip')
- if not alias:
- sys.exit(OCF_ERR_CONFIGURED)
+ validate()
+ if 'validate-all' in sys.argv[1]:
+ return
- configure()
+ configure_logs()
if 'start' in sys.argv[1]:
- gcp_alias_start(alias)
+ gcp_alias_start(ALIAS)
elif 'stop' in sys.argv[1]:
- gcp_alias_stop(alias)
+ gcp_alias_stop(ALIAS)
elif 'status' in sys.argv[1] or 'monitor' in sys.argv[1]:
- gcp_alias_status(alias)
+ gcp_alias_status(ALIAS)
else:
- logging.error('gcp:alias - no such function %s' % str(sys.argv[1]))
+ logging.error('no such function %s' % str(sys.argv[1]))
if __name__ == "__main__":
main()

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