--- a/agents/gce/fence_gce.py 2022-04-28 12:02:23.524448642 +0200
+++ b/agents/gce/fence_gce.py 2022-04-28 12:02:27.698469373 +0200
@@ -1,10 +1,23 @@
#!@PYTHON@ -tt
+#
+# Requires the googleapiclient and oauth2client
+# RHEL 7.x: google-api-python-client==1.6.7 python-gflags==2.0 pyasn1==0.4.8 rsa==3.4.2 pysocks==1.7.1 httplib2==0.19.0
+# RHEL 8.x: pysocks==1.7.1 httplib2==0.19.0
+# SLES 12.x: python-google-api-python-client python-oauth2client python-oauth2client-gce pysocks==1.7.1 httplib2==0.19.0
+# SLES 15.x: python3-google-api-python-client python3-oauth2client pysocks==1.7.1 httplib2==0.19.0
+#
+
import atexit
+import httplib2
import logging
+import json
+import re
import os
+import socket
import sys
import time
+
if sys.version_info >= (3, 0):
# Python 3 imports.
import urllib.parse as urlparse
@@ -15,12 +28,98 @@
import urllib2 as urlrequest
sys.path.append("@FENCEAGENTSLIBDIR@")
-import googleapiclient.discovery
-from fencing import fail_usage, run_delay, all_opt, atexit_handler, check_input, process_input, show_docs, fence_action
-
+from fencing import fail_usage, run_delay, all_opt, atexit_handler, check_input, process_input, show_docs, fence_action, run_command
+try:
+ import googleapiclient.discovery
+ import socks
+ try:
+ from google.oauth2.credentials import Credentials as GoogleCredentials
+ except:
+ from oauth2client.client import GoogleCredentials
+except:
+ pass
METADATA_SERVER = 'http://metadata.google.internal/computeMetadata/v1/'
METADATA_HEADERS = {'Metadata-Flavor': 'Google'}
+INSTANCE_LINK = 'https://www.googleapis.com/compute/v1/projects/{}/zones/{}/instances/{}'
+
+def run_on_fail(options):
+ if "--runonfail" in options:
+ run_command(options, options["--runonfail"])
+
+def fail_fence_agent(options, message):
+ run_on_fail(options)
+ fail_usage(message)
+
+def raise_fence_agent(options, message):
+ run_on_fail(options)
+ raise Exception(message)
+
+#
+# Will use baremetalsolution setting or the environment variable
+# FENCE_GCE_URI_REPLACEMENTS to replace the uri for calls to *.googleapis.com.
+#
+def replace_api_uri(options, http_request):
+ uri_replacements = []
+ # put any env var replacements first, then baremetalsolution if in options
+ if "FENCE_GCE_URI_REPLACEMENTS" in os.environ:
+ logging.debug("FENCE_GCE_URI_REPLACEMENTS environment variable exists")
+ env_uri_replacements = os.environ["FENCE_GCE_URI_REPLACEMENTS"]
+ try:
+ uri_replacements_json = json.loads(env_uri_replacements)
+ if isinstance(uri_replacements_json, list):
+ uri_replacements = uri_replacements_json
+ else:
+ logging.warning("FENCE_GCE_URI_REPLACEMENTS exists, but is not a JSON List")
+ except ValueError as e:
+ logging.warning("FENCE_GCE_URI_REPLACEMENTS exists but is not valid JSON")
+ if "--baremetalsolution" in options:
+ uri_replacements.append(
+ {
+ "matchlength": 4,
+ "match": "https://compute.googleapis.com/compute/v1/projects/(.*)/zones/(.*)/instances/(.*)/reset(.*)",
+ "replace": "https://baremetalsolution.googleapis.com/v1/projects/\\1/locations/\\2/instances/\\3:resetInstance\\4"
+ })
+ for uri_replacement in uri_replacements:
+ # each uri_replacement should have matchlength, match, and replace
+ if "matchlength" not in uri_replacement or "match" not in uri_replacement or "replace" not in uri_replacement:
+ logging.warning("FENCE_GCE_URI_REPLACEMENTS missing matchlength, match, or replace in %s" % uri_replacement)
+ continue
+ match = re.match(uri_replacement["match"], http_request.uri)
+ if match is None or len(match.groups()) != uri_replacement["matchlength"]:
+ continue
+ replaced_uri = re.sub(uri_replacement["match"], uri_replacement["replace"], http_request.uri)
+ match = re.match("https:\/\/.*.googleapis.com", replaced_uri)
+ if match is None or match.start() != 0:
+ logging.warning("FENCE_GCE_URI_REPLACEMENTS replace is not "
+ "targeting googleapis.com, ignoring it: %s" % replaced_uri)
+ continue
+ logging.debug("Replacing googleapis uri %s with %s" % (http_request.uri, replaced_uri))
+ http_request.uri = replaced_uri
+ break
+ return http_request
+
+def retry_api_execute(options, http_request):
+ replaced_http_request = replace_api_uri(options, http_request)
+ retries = 3
+ if options.get("--retries"):
+ retries = int(options.get("--retries"))
+ retry_sleep = 5
+ if options.get("--retrysleep"):
+ retry_sleep = int(options.get("--retrysleep"))
+ retry = 0
+ current_err = None
+ while retry <= retries:
+ if retry > 0:
+ time.sleep(retry_sleep)
+ try:
+ return replaced_http_request.execute()
+ except Exception as err:
+ current_err = err
+ logging.warning("Could not execute api call to: %s, retry: %s, "
+ "err: %s" % (replaced_http_request.uri, retry, str(err)))
+ retry += 1
+ raise current_err
def translate_status(instance_status):
@@ -34,86 +133,174 @@
def get_nodes_list(conn, options):
result = {}
+ if "--zone" not in options:
+ fail_fence_agent(options, "Failed: get_nodes_list: Please specify the --zone in the command")
try:
- instanceList = conn.instances().list(project=options["--project"], zone=options["--zone"]).execute()
- for instance in instanceList["items"]:
- result[instance["id"]] = (instance["name"], translate_status(instance["status"]))
+ for zone in options["--zone"].split(","):
+ instanceList = retry_api_execute(options, conn.instances().list(
+ project=options["--project"],
+ zone=zone))
+ for instance in instanceList["items"]:
+ result[instance["id"]] = (instance["name"], translate_status(instance["status"]))
except Exception as err:
- fail_usage("Failed: get_nodes_list: {}".format(str(err)))
+ fail_fence_agent(options, "Failed: get_nodes_list: {}".format(str(err)))
return result
def get_power_status(conn, options):
+ logging.debug("get_power_status")
+ # if this is bare metal we need to just send back the opposite of the
+ # requested action: if on send off, if off send on
+ if "--baremetalsolution" in options:
+ if options.get("--action") == "on":
+ return "off"
+ else:
+ return "on"
+ # If zone is not listed for an entry we attempt to get it automatically
+ instance = options["--plug"]
+ zone = get_zone(conn, options, instance) if "--plugzonemap" not in options else options["--plugzonemap"][instance]
+ instance_status = get_instance_power_status(conn, options, instance, zone)
+ # If any of the instances do not match the intended status we return the
+ # the opposite status so that the fence agent can change it.
+ if instance_status != options.get("--action"):
+ return instance_status
+
+ return options.get("--action")
+
+
+def get_instance_power_status(conn, options, instance, zone):
try:
- instance = conn.instances().get(
- project=options["--project"],
- zone=options["--zone"],
- instance=options["--plug"]).execute()
+ instance = retry_api_execute(
+ options,
+ conn.instances().get(project=options["--project"], zone=zone, instance=instance))
return translate_status(instance["status"])
except Exception as err:
- fail_usage("Failed: get_power_status: {}".format(str(err)))
+ fail_fence_agent(options, "Failed: get_instance_power_status: {}".format(str(err)))
-def wait_for_operation(conn, project, zone, operation):
+def check_for_existing_operation(conn, options, instance, zone, operation_type):
+ logging.debug("check_for_existing_operation")
+ if "--baremetalsolution" in options:
+ # There is no API for checking in progress operations
+ return False
+
+ project = options["--project"]
+ target_link = INSTANCE_LINK.format(project, zone, instance)
+ query_filter = '(targetLink = "{}") AND (operationType = "{}") AND (status = "RUNNING")'.format(target_link, operation_type)
+ result = retry_api_execute(
+ options,
+ conn.zoneOperations().list(project=project, zone=zone, filter=query_filter, maxResults=1))
+
+ if "items" in result and result["items"]:
+ logging.info("Existing %s operation found", operation_type)
+ return result["items"][0]
+
+
+def wait_for_operation(conn, options, zone, operation):
+ if 'name' not in operation:
+ logging.warning('Cannot wait for operation to complete, the'
+ ' requested operation will continue asynchronously')
+ return False
+
+ wait_time = 0
+ project = options["--project"]
while True:
- result = conn.zoneOperations().get(
+ result = retry_api_execute(options, conn.zoneOperations().get(
project=project,
zone=zone,
- operation=operation['name']).execute()
+ operation=operation['name']))
if result['status'] == 'DONE':
if 'error' in result:
- raise Exception(result['error'])
- return
+ raise_fence_agent(options, result['error'])
+ return True
+
+ if "--errortimeout" in options and wait_time > int(options["--errortimeout"]):
+ raise_fence_agent(options, "Operation did not complete before the timeout.")
+
+ if "--warntimeout" in options and wait_time > int(options["--warntimeout"]):
+ logging.warning("Operation did not complete before the timeout.")
+ if "--runonwarn" in options:
+ run_command(options, options["--runonwarn"])
+ return False
+
+ wait_time = wait_time + 1
time.sleep(1)
def set_power_status(conn, options):
+ logging.debug("set_power_status")
+ instance = options["--plug"]
+ # If zone is not listed for an entry we attempt to get it automatically
+ zone = get_zone(conn, options, instance) if "--plugzonemap" not in options else options["--plugzonemap"][instance]
+ set_instance_power_status(conn, options, instance, zone, options["--action"])
+
+
+def set_instance_power_status(conn, options, instance, zone, action):
+ logging.info("Setting power status of %s in zone %s", instance, zone)
+ project = options["--project"]
+
try:
- if options["--action"] == "off":
- logging.info("Issuing poweroff of %s in zone %s" % (options["--plug"], options["--zone"]))
- operation = conn.instances().stop(
- project=options["--project"],
- zone=options["--zone"],
- instance=options["--plug"]).execute()
- wait_for_operation(conn, options["--project"], options["--zone"], operation)
- logging.info("Poweroff of %s in zone %s complete" % (options["--plug"], options["--zone"]))
- elif options["--action"] == "on":
- logging.info("Issuing poweron of %s in zone %s" % (options["--plug"], options["--zone"]))
- operation = conn.instances().start(
- project=options["--project"],
- zone=options["--zone"],
- instance=options["--plug"]).execute()
- wait_for_operation(conn, options["--project"], options["--zone"], operation)
- logging.info("Poweron of %s in zone %s complete" % (options["--plug"], options["--zone"]))
+ if action == "off":
+ logging.info("Issuing poweroff of %s in zone %s", instance, zone)
+ operation = check_for_existing_operation(conn, options, instance, zone, "stop")
+ if operation and "--earlyexit" in options:
+ return
+ if not operation:
+ operation = retry_api_execute(
+ options,
+ conn.instances().stop(project=project, zone=zone, instance=instance))
+ logging.info("Poweroff command completed, waiting for the operation to complete")
+ if wait_for_operation(conn, options, zone, operation):
+ logging.info("Poweroff of %s in zone %s complete", instance, zone)
+ elif action == "on":
+ logging.info("Issuing poweron of %s in zone %s", instance, zone)
+ operation = check_for_existing_operation(conn, options, instance, zone, "start")
+ if operation and "--earlyexit" in options:
+ return
+ if not operation:
+ operation = retry_api_execute(
+ options,
+ conn.instances().start(project=project, zone=zone, instance=instance))
+ if wait_for_operation(conn, options, zone, operation):
+ logging.info("Poweron of %s in zone %s complete", instance, zone)
except Exception as err:
- fail_usage("Failed: set_power_status: {}".format(str(err)))
-
+ fail_fence_agent(options, "Failed: set_instance_power_status: {}".format(str(err)))
def power_cycle(conn, options):
+ logging.debug("power_cycle")
+ instance = options["--plug"]
+ # If zone is not listed for an entry we attempt to get it automatically
+ zone = get_zone(conn, options, instance) if "--plugzonemap" not in options else options["--plugzonemap"][instance]
+ return power_cycle_instance(conn, options, instance, zone)
+
+
+def power_cycle_instance(conn, options, instance, zone):
+ logging.info("Issuing reset of %s in zone %s", instance, zone)
+ project = options["--project"]
+
try:
- logging.info('Issuing reset of %s in zone %s' % (options["--plug"], options["--zone"]))
- operation = conn.instances().reset(
- project=options["--project"],
- zone=options["--zone"],
- instance=options["--plug"]).execute()
- wait_for_operation(conn, options["--project"], options["--zone"], operation)
- logging.info('Reset of %s in zone %s complete' % (options["--plug"], options["--zone"]))
+ operation = check_for_existing_operation(conn, options, instance, zone, "reset")
+ if operation and "--earlyexit" in options:
+ return True
+ if not operation:
+ operation = retry_api_execute(
+ options,
+ conn.instances().reset(project=project, zone=zone, instance=instance))
+ logging.info("Reset command sent, waiting for the operation to complete")
+ if wait_for_operation(conn, options, zone, operation):
+ logging.info("Reset of %s in zone %s complete", instance, zone)
return True
except Exception as err:
- logging.error("Failed: power_cycle: {}".format(str(err)))
- return False
+ logging.exception("Failed: power_cycle")
+ raise err
-def get_instance(conn, project, zone, instance):
- request = conn.instances().get(
- project=project, zone=zone, instance=instance)
- return request.execute()
-
-
-def get_zone(conn, project, instance):
+def get_zone(conn, options, instance):
+ logging.debug("get_zone");
+ project = options['--project']
fl = 'name="%s"' % instance
- request = conn.instances().aggregatedList(project=project, filter=fl)
+ request = replace_api_uri(options, conn.instances().aggregatedList(project=project, filter=fl))
while request is not None:
response = request.execute()
zones = response.get('items', {})
@@ -121,9 +308,9 @@
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))
+ request = replace_api_uri(options, conn.instances().aggregatedList_next(
+ previous_request=request, previous_response=response))
+ raise_fence_agent(options, "Unable to find instance %s" % (instance))
def get_metadata(metadata_key, params=None, timeout=None):
@@ -140,13 +327,14 @@
Raises:
urlerror.HTTPError: raises when the GET request fails.
"""
+ logging.debug("get_metadata");
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()
+ return request_opener.open(request, timeout=timeout * 1.1).read().decode("utf-8")
def define_new_opts():
@@ -169,18 +357,134 @@
all_opt["stackdriver-logging"] = {
"getopt" : "",
"longopt" : "stackdriver-logging",
- "help" : "--stackdriver-logging Enable Logging to Stackdriver. Using stackdriver logging requires additional libraries (google-cloud-logging).",
- "shortdesc" : "Stackdriver-logging support. Requires additional libraries (google-cloud-logging).",
- "longdesc" : "If enabled IP failover logs will be posted to stackdriver logging. Using stackdriver logging requires additional libraries (google-cloud-logging).",
+ "help" : "--stackdriver-logging Enable Logging to Stackdriver",
+ "shortdesc" : "Stackdriver-logging support.",
+ "longdesc" : "If enabled IP failover logs will be posted to stackdriver logging.",
"required" : "0",
"order" : 4
}
+ all_opt["baremetalsolution"] = {
+ "getopt" : "",
+ "longopt" : "baremetalsolution",
+ "help" : "--baremetalsolution Enable on bare metal",
+ "shortdesc" : "If enabled this is a bare metal offering from google.",
+ "required" : "0",
+ "order" : 5
+ }
+ all_opt["apitimeout"] = {
+ "getopt" : ":",
+ "type" : "second",
+ "longopt" : "apitimeout",
+ "help" : "--apitimeout=[seconds] Timeout to use for API calls",
+ "shortdesc" : "Timeout in seconds to use for API calls, default is 60.",
+ "required" : "0",
+ "default" : 60,
+ "order" : 6
+ }
+ all_opt["retries"] = {
+ "getopt" : ":",
+ "type" : "integer",
+ "longopt" : "retries",
+ "help" : "--retries=[retries] Number of retries on failure for API calls",
+ "shortdesc" : "Number of retries on failure for API calls, default is 3.",
+ "required" : "0",
+ "default" : 3,
+ "order" : 7
+ }
+ all_opt["retrysleep"] = {
+ "getopt" : ":",
+ "type" : "second",
+ "longopt" : "retrysleep",
+ "help" : "--retrysleep=[seconds] Time to sleep between API retries",
+ "shortdesc" : "Time to sleep in seconds between API retries, default is 5.",
+ "required" : "0",
+ "default" : 5,
+ "order" : 8
+ }
+ all_opt["serviceaccount"] = {
+ "getopt" : ":",
+ "longopt" : "serviceaccount",
+ "help" : "--serviceaccount=[filename] Service account json file location e.g. serviceaccount=/somedir/service_account.json",
+ "shortdesc" : "Service Account to use for authentication to the google cloud APIs.",
+ "required" : "0",
+ "order" : 9
+ }
+ all_opt["plugzonemap"] = {
+ "getopt" : ":",
+ "longopt" : "plugzonemap",
+ "help" : "--plugzonemap=[plugzonemap] Comma separated zone map when fencing multiple plugs",
+ "shortdesc" : "Comma separated zone map when fencing multiple plugs.",
+ "required" : "0",
+ "order" : 10
+ }
+ all_opt["proxyhost"] = {
+ "getopt" : ":",
+ "longopt" : "proxyhost",
+ "help" : "--proxyhost=[proxy_host] The proxy host to use, if one is needed to access the internet (Example: 10.122.0.33)",
+ "shortdesc" : "If a proxy is used for internet access, the proxy host should be specified.",
+ "required" : "0",
+ "order" : 11
+ }
+ all_opt["proxyport"] = {
+ "getopt" : ":",
+ "type" : "integer",
+ "longopt" : "proxyport",
+ "help" : "--proxyport=[proxy_port] The proxy port to use, if one is needed to access the internet (Example: 3127)",
+ "shortdesc" : "If a proxy is used for internet access, the proxy port should be specified.",
+ "required" : "0",
+ "order" : 12
+ }
+ all_opt["earlyexit"] = {
+ "getopt" : "",
+ "longopt" : "earlyexit",
+ "help" : "--earlyexit Return early if reset is already in progress",
+ "shortdesc" : "If an existing reset operation is detected, the fence agent will return before the operation completes with a 0 return code.",
+ "required" : "0",
+ "order" : 13
+ }
+ all_opt["warntimeout"] = {
+ "getopt" : ":",
+ "type" : "second",
+ "longopt" : "warntimeout",
+ "help" : "--warntimeout=[warn_timeout] Timeout seconds before logging a warning and returning a 0 status code",
+ "shortdesc" : "If the operation is not completed within the timeout, the cluster operations are allowed to continue.",
+ "required" : "0",
+ "order" : 14
+ }
+ all_opt["errortimeout"] = {
+ "getopt" : ":",
+ "type" : "second",
+ "longopt" : "errortimeout",
+ "help" : "--errortimeout=[error_timeout] Timeout seconds before failing and returning a non-zero status code",
+ "shortdesc" : "If the operation is not completed within the timeout, cluster is notified of the operation failure.",
+ "required" : "0",
+ "order" : 15
+ }
+ all_opt["runonwarn"] = {
+ "getopt" : ":",
+ "longopt" : "runonwarn",
+ "help" : "--runonwarn=[run_on_warn] If a timeout occurs and warning is generated, run the supplied command",
+ "shortdesc" : "If a timeout would occur while running the agent, then the supplied command is run.",
+ "required" : "0",
+ "order" : 16
+ }
+ all_opt["runonfail"] = {
+ "getopt" : ":",
+ "longopt" : "runonfail",
+ "help" : "--runonfail=[run_on_fail] If a failure occurs, run the supplied command",
+ "shortdesc" : "If a failure would occur while running the agent, then the supplied command is run.",
+ "required" : "0",
+ "order" : 17
+ }
def main():
conn = None
- device_opt = ["port", "no_password", "zone", "project", "stackdriver-logging", "method"]
+ device_opt = ["port", "no_password", "zone", "project", "stackdriver-logging",
+ "method", "baremetalsolution", "apitimeout", "retries", "retrysleep",
+ "serviceaccount", "plugzonemap", "proxyhost", "proxyport", "earlyexit",
+ "warntimeout", "errortimeout", "runonwarn", "runonfail"]
atexit.register(atexit_handler)
@@ -224,28 +528,76 @@
logging.error('Couldn\'t import google.cloud.logging, '
'disabling Stackdriver-logging support')
+ # if apitimeout is defined we set the socket timeout, if not we keep the
+ # socket default which is 60s
+ if options.get("--apitimeout"):
+ socket.setdefaulttimeout(options["--apitimeout"])
+
# Prepare cli
try:
- credentials = None
- if tuple(googleapiclient.__version__) < tuple("1.6.0"):
- import oauth2client.client
- credentials = oauth2client.client.GoogleCredentials.get_application_default()
- conn = googleapiclient.discovery.build('compute', 'v1', credentials=credentials)
+ serviceaccount = options.get("--serviceaccount")
+ if serviceaccount:
+ scope = ['https://www.googleapis.com/auth/cloud-platform']
+ logging.debug("using credentials from service account")
+ try:
+ from google.oauth2.service_account import Credentials as ServiceAccountCredentials
+ credentials = ServiceAccountCredentials.from_service_account_file(filename=serviceaccount, scopes=scope)
+ except ImportError:
+ from oauth2client.service_account import ServiceAccountCredentials
+ credentials = ServiceAccountCredentials.from_json_keyfile_name(serviceaccount, scope)
+ else:
+ try:
+ from googleapiclient import _auth
+ credentials = _auth.default_credentials();
+ except:
+ credentials = GoogleCredentials.get_application_default()
+ logging.debug("using application default credentials")
+
+ if options.get("--proxyhost") and options.get("--proxyport"):
+ proxy_info = httplib2.ProxyInfo(
+ proxy_type=socks.PROXY_TYPE_HTTP,
+ proxy_host=options.get("--proxyhost"),
+ proxy_port=int(options.get("--proxyport")))
+ http = credentials.authorize(httplib2.Http(proxy_info=proxy_info))
+ conn = googleapiclient.discovery.build(
+ 'compute', 'v1', http=http, cache_discovery=False)
+ else:
+ conn = googleapiclient.discovery.build(
+ 'compute', 'v1', credentials=credentials, cache_discovery=False)
except Exception as err:
- fail_usage("Failed: Create GCE compute v1 connection: {}".format(str(err)))
+ fail_fence_agent(options, "Failed: Create GCE compute v1 connection: {}".format(str(err)))
# Get project and zone
if not options.get("--project"):
try:
options["--project"] = get_metadata('project/project-id')
except Exception as err:
- fail_usage("Failed retrieving GCE project. Please provide --project option: {}".format(str(err)))
+ fail_fence_agent(options, "Failed retrieving GCE project. Please provide --project option: {}".format(str(err)))
- if not options.get("--zone"):
- try:
- options["--zone"] = get_zone(conn, options['--project'], options['--plug'])
- except Exception as err:
- fail_usage("Failed retrieving GCE zone. Please provide --zone option: {}".format(str(err)))
+ if "--baremetalsolution" in options:
+ options["--zone"] = "none"
+
+ # Populates zone automatically if missing from the command
+ zones = [] if not "--zone" in options else options["--zone"].split(",")
+ options["--plugzonemap"] = {}
+ if "--plug" in options:
+ for i, instance in enumerate(options["--plug"].split(",")):
+ if len(zones) == 1:
+ # If only one zone is specified, use it across all plugs
+ options["--plugzonemap"][instance] = zones[0]
+ continue
+
+ if len(zones) - 1 >= i:
+ # If we have enough zones specified with the --zone flag use the zone at
+ # the same index as the plug
+ options["--plugzonemap"][instance] = zones[i]
+ continue
+
+ try:
+ # In this case we do not have a zone specified so we attempt to detect it
+ options["--plugzonemap"][instance] = get_zone(conn, options, instance)
+ except Exception as err:
+ fail_fence_agent(options, "Failed retrieving GCE zone. Please provide --zone option: {}".format(str(err)))
# Operate the fencing device
result = fence_action(conn, options, set_power_status, get_power_status, get_nodes_list, power_cycle)