--- a/heartbeat/gcp-vpc-move-vip.in	2020-08-17 10:33:22.132531259 +0200

+++ b/heartbeat/gcp-vpc-move-vip.in	2020-08-17 10:34:54.050633259 +0200

@@ -22,7 +22,8 @@

 import sys

 import time

-OCF_FUNCTIONS_DIR="%s/lib/heartbeat" % os.environ.get("OCF_ROOT")

+OCF_FUNCTIONS_DIR = os.environ.get("OCF_FUNCTIONS_DIR", "%s/lib/heartbeat"

+                                   % os.environ.get("OCF_ROOT"))

 sys.path.append(OCF_FUNCTIONS_DIR)

 from ocf import *

@@ -43,6 +44,10 @@

   import urllib2 as urlrequest

+# Constants for alias add/remove modes

+ADD = 0

+REMOVE = 1

+

 CONN = None

 THIS_VM = None

 ALIAS = None

@@ -53,27 +58,27 @@

 <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>

+  <longdesc lang="en">Floating IP Address or Range on Google Cloud Platform - Using Alias IP address functionality to attach a secondary IP range to a running instance</longdesc>

+  <shortdesc lang="en">Floating IP Address or Range on Google Cloud Platform</shortdesc>

   <parameters>

     <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>

+      <longdesc lang="en">IP range to be added including CIDR netmask (e.g., 192.168.0.1/32)</longdesc>

+      <shortdesc lang="en">IP range to be added including CIDR netmask (e.g., 192.168.0.1/32)</shortdesc>

       <content type="string" default="" />

     </parameter>

-    <parameter name="alias_range_name" unique="1" required="0">

+    <parameter name="alias_range_name" unique="0" required="0">

       <longdesc lang="en">Subnet name for the Alias IP</longdesc>

       <shortdesc lang="en">Subnet name for the Alias IP</shortdesc>

       <content type="string" default="" />

     </parameter>

-    <parameter name="hostlist" unique="1" required="0">

-      <longdesc lang="en">List of hosts in the cluster</longdesc>

+    <parameter name="hostlist" unique="0" required="0">

+      <longdesc lang="en">List of hosts in the cluster, separated by spaces</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. Using stackdriver logging requires additional libraries (google-cloud-logging).</longdesc>

-      <shortdesc lang="en">Stackdriver-logging support. Requires additional libraries (google-cloud-logging).</shortdesc>

+      <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>

   </parameters>

@@ -107,7 +112,8 @@

   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().decode("utf-8")

+  return request_opener.open(

+      request, timeout=timeout * 1.1).read().decode("utf-8")

 def get_instance(project, zone, instance):

@@ -134,17 +140,21 @@

     time.sleep(1)

-def set_alias(project, zone, instance, alias, alias_range_name=None):

-  fingerprint = get_network_ifaces(project, zone, instance)[0]['fingerprint']

+def set_aliases(project, zone, instance, aliases, fingerprint):

+  """Sets the alias IP ranges for an instance.

+

+  Args:

+    project: string, the project in which the instance resides.

+    zone: string, the zone in which the instance resides.

+    instance: string, the name of the instance.

+    aliases: list, the list of dictionaries containing alias IP ranges

+      to be added to or removed from the instance.

+    fingerprint: string, the fingerprint of the network interface.

+  """

   body = {

-      'aliasIpRanges': [],

-      'fingerprint': fingerprint

+    'aliasIpRanges': aliases,

+    '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,

@@ -153,21 +163,75 @@

   wait_for_operation(project, zone, operation)

-def get_alias(project, zone, instance):

-  iface = get_network_ifaces(project, zone, instance)

+def add_rm_alias(mode, project, zone, instance, alias, alias_range_name=None):

+  """Adds or removes an alias IP range for a GCE instance.

+

+  Args:

+    mode: int, a constant (ADD (0) or REMOVE (1)) indicating the

+      operation type.

+    project: string, the project in which the instance resides.

+    zone: string, the zone in which the instance resides.

+    instance: string, the name of the instance.

+    alias: string, the alias IP range to be added to or removed from

+      the instance.

+    alias_range_name: string, the subnet name for the alias IP range.

+

+  Returns:

+    True if the existing list of alias IP ranges was modified, or False

+    otherwise.

+  """

+  ifaces = get_network_ifaces(project, zone, instance)

+  fingerprint = ifaces[0]['fingerprint']

+

+  try:

+    old_aliases = ifaces[0]['aliasIpRanges']

+  except KeyError:

+    old_aliases = []

+

+  new_aliases = [a for a in old_aliases if a['ipCidrRange'] != alias]

+

+  if alias:

+    if mode == ADD:

+      obj = {'ipCidrRange': alias}

+      if alias_range_name:

+        obj['subnetworkRangeName'] = alias_range_name

+      new_aliases.append(obj)

+    elif mode == REMOVE:

+      pass    # already removed during new_aliases build

+    else:

+      raise ValueError('Invalid value for mode: {}'.format(mode))

+

+  if (sorted(new_aliases) != sorted(old_aliases)):

+    set_aliases(project, zone, instance, new_aliases, fingerprint)

+    return True

+  else:

+    return False

+

+

+def add_alias(project, zone, instance, alias, alias_range_name=None):

+  return add_rm_alias(ADD, project, zone, instance, alias, alias_range_name)

+

+

+def remove_alias(project, zone, instance, alias):

+  return add_rm_alias(REMOVE, project, zone, instance, alias)

+

+

+def get_aliases(project, zone, instance):

+  ifaces = get_network_ifaces(project, zone, instance)

   try:

-    return iface[0]['aliasIpRanges'][0]['ipCidrRange']

+    aliases = ifaces[0]['aliasIpRanges']

+    return [a['ipCidrRange'] for a in aliases]

   except KeyError:

-    return ''

+    return []

-def get_localhost_alias():

+def get_localhost_aliases():

   net_iface = get_metadata('instance/network-interfaces', {'recursive': True})

   net_iface = json.loads(net_iface)

   try:

-    return net_iface[0]['ipAliases'][0]

+    return net_iface[0]['ipAliases']

   except (KeyError, IndexError):

-    return ''

+    return []

 def get_zone(project, instance):

@@ -201,21 +265,17 @@

 def gcp_alias_start(alias):

-  my_alias = get_localhost_alias()

+  my_aliases = get_localhost_aliases()

   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:

+  if alias in my_aliases:

+    # TODO: Do we need to check alias_range_name?

     logger.info(

         '%s already has %s attached. No action required' % (THIS_VM, alias))

     sys.exit(OCF_SUCCESS)

-  elif my_alias:

-    logger.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

+  # If the alias is currently attached to another host, detach it.

   hostlist = os.environ.get('OCF_RESKEY_hostlist', '')

   if hostlist:

     hostlist = hostlist.replace(THIS_VM, '').split()

@@ -223,47 +283,53 @@

     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:

+    host_aliases = get_aliases(project, host_zone, host)

+    if alias in host_aliases:

       logger.info(

-          '%s is attached to %s - Removing all alias IP addresses from %s' %

-          (alias, host, host))

-      set_alias(project, host_zone, host, '')

+          '%s is attached to %s - Removing %s from %s' %

+          (alias, host, alias, host))

+      remove_alias(project, host_zone, host, alias)

       break

-  # add alias IP to localhost

-  set_alias(

+  # Add alias IP range to localhost

+  add_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:

+  # Verify that the IP range has been added

+  my_aliases = get_localhost_aliases()

+  if alias in my_aliases:

     logger.info('Finished adding %s to %s' % (alias, THIS_VM))

-  elif my_alias:

-    logger.error(

-        'Failed to add IP. %s has an IP attached but it isn\'t %s' %

-        (THIS_VM, alias))

-    sys.exit(OCF_ERR_GENERIC)

   else:

-    logger.error('Failed to add IP address %s to %s' % (alias, THIS_VM))

+    if my_aliases:

+      logger.error(

+          'Failed to add alias IP range %s. %s has alias IP ranges attached but'

+          + ' they don\'t include %s' % (alias, THIS_VM, alias))

+    else:

+      logger.error(

+          'Failed to add IP range %s. %s has no alias IP ranges attached'

+           % (alias, THIS_VM))

     sys.exit(OCF_ERR_GENERIC)

 def gcp_alias_stop(alias):

-  my_alias = get_localhost_alias()

+  my_aliases = get_localhost_aliases()

   my_zone = get_metadata('instance/zone').split('/')[-1]

   project = get_metadata('project/project-id')

-  if my_alias == alias:

-    logger.info('Removing %s from %s' % (my_alias, THIS_VM))

-    set_alias(project, my_zone, THIS_VM, '')

+  if alias in my_aliases:

+    logger.info('Removing %s from %s' % (alias, THIS_VM))

+    remove_alias(project, my_zone, THIS_VM, alias)

+  else:

+    logger.info(

+        '%s is not attached to %s. No action required'

+        % (alias, THIS_VM))

 def gcp_alias_status(alias):

-  my_alias = get_localhost_alias()

-  if alias == my_alias:

-    logger.info('%s has the correct IP address attached' % THIS_VM)

+  my_aliases = get_localhost_aliases()

+  if alias in my_aliases:

+    logger.info('%s has the correct IP range attached' % THIS_VM)

   else:

     sys.exit(OCF_NOT_RUNNING)

@@ -275,7 +341,8 @@

   # Populate global vars

   try:

-    CONN = googleapiclient.discovery.build('compute', 'v1')

+    CONN = googleapiclient.discovery.build('compute', 'v1',

+                                           cache_discovery=False)

   except Exception as e:

     logger.error('Couldn\'t connect with google api: ' + str(e))

     sys.exit(OCF_ERR_CONFIGURED)

@@ -283,7 +350,8 @@

   try:

     THIS_VM = get_metadata('instance/name')

   except Exception as e:

-    logger.error('Couldn\'t get instance name, is this running inside GCE?: ' + str(e))

+    logger.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')

@@ -309,7 +377,8 @@

         formatter = logging.Formatter('gcp:alias "%(message)s"')

         handler.setFormatter(formatter)

         log.addHandler(handler)

-        logger = logging.LoggerAdapter(log, {'OCF_RESOURCE_INSTANCE': OCF_RESOURCE_INSTANCE})

+        logger = logging.LoggerAdapter(log, {'OCF_RESOURCE_INSTANCE':

+                                             OCF_RESOURCE_INSTANCE})

       except ImportError:

         logger.error('Couldn\'t import google.cloud.logging, '

             'disabling Stackdriver-logging support')