Add ping_ok utility method

datacenterlight/utils.py

@@ -1,3 +1,5 @@
+import logging
+import subprocess
 from django.contrib.sites.models import Site
 
 from datacenterlight.tasks import create_vm_task
@@ -8,6 +10,8 @@ from utils.models import BillingAddress
 from .cms_models import CMSIntegration
 from .models import VMPricing, VMTemplate
 
+logger = logging.getLogger(__name__)
+
 
 def get_cms_integration(name):
     current_site = Site.objects.get_current()
@@ -91,3 +95,21 @@ def create_vm(billing_address_data, stripe_customer_id, specs,
                         'token', 'customer']:
         if session_var in request.session:
             del request.session[session_var]
+
+
+def ping_ok(host_ipv6):
+    """
+    A utility method to check if a host responds to ping requests. Note: the
+    function relies on `ping6` utility of debian to check.
+
+    :param host_ipv6 str type parameter that represets the ipv6 of the host to
+           checked
+    :return True if the host responds to ping else returns False
+    """
+    try:
+        output = subprocess.check_output("ping6 -c 1 -w 2 " + host_ipv6,
+                                         shell=True)
+    except Exception as ex:
+        logger.debug(host_ipv6 + " not reachable via ping. Error = " + str(ex))
+        return False
+    return True