Migration log: reduce number of entries and use microtime to avoid ch…

…ances of duplicates

igvm/hypervisor.py

@@ -6,7 +6,8 @@
 import logging
 import math
 from contextlib import contextmanager
-from time import sleep, time
+from time import sleep
+from datetime import datetime
 from xml.etree import ElementTree
 
 from igvm.vm import VM
@@ -1149,9 +1150,12 @@ def log_migration(self, vm: VM, operator: str) -> None:
         :param operator: plus for migration to HV, minus for migration from HV
         """
 
-        cpu_usage_vm = self.estimate_vm_cpu_usage(vm)
-        timestamp = int(time())
-        log_entry = '{} {}{}'.format(timestamp, operator, round(cpu_usage_vm))
+        cpu_usage_vm = round(self.estimate_vm_cpu_usage(vm))
+        if cpu_usage_vm == 0:
+            return
+
+        timestamp = datetime.now().isoformat()
+        log_entry = '{} {}{}'.format(timestamp, operator, cpu_usage_vm)
 
         self.dataset_obj['igvm_migration_log'].add(log_entry)
         self.dataset_obj.commit()

igvm/settings.py

@@ -125,7 +125,6 @@
     'igvm_migration_log',
     'intern_ip',
     'iops_avg',
-    'igvm_migration_log',
     'libvirt_memory_total_gib',
     'libvirt_memory_used_gib',
     'libvirt_pool_total_gib',

tests/test_integration.py

@@ -518,7 +518,7 @@ def test_igvm_migration_log(self, performance_value, mock_time):
 
         src_hv = self.vm.hypervisor.dataset_obj['hostname']
         cpu_usage_vm_src = self.vm.hypervisor.estimate_vm_cpu_usage(self.vm)
-        timestamp = 1234567890
+        timestamp = 1234567890000
 
         vm_migrate(
             VM_HOSTNAME,