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Fix for serial when percent amount is less than one host (#15396)

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Ansible when there was a percentage that was calculated to be less than
1.0 would run all hosts as the value for a rolling update.

The error is due to the fact that Python will round a
float that is under 1.0 to 0, which will trigger the case of
0 hosts. The 0 host case tells ansible to run all hosts.

The fix will see if the percentage calculation after int
conversion is 0 and will else to 1 host.
This commit is contained in:
Jonathon Klobucar 2016-04-13 07:49:38 -07:00 committed by Brian Coca
parent 22467a0de8
commit 7bee994e1c
2 changed files with 12 additions and 1 deletions
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2
lib/ansible/executor/playbook_executor.py
View file

@ -214,7 +214,7 @@ class PlaybookExecutor:
# and convert it to an integer value based on the number of hosts
if isinstance(play.serial, string_types) and play.serial.endswith('%'):
serial_pct = int(play.serial.replace("%",""))
serial = int((serial_pct/100.0) * len(all_hosts))
serial = int((serial_pct/100.0) * len(all_hosts)) or 1
else:
if play.serial is None:
serial = -1

11
test/units/executor/test_playbook_executor.py
View file

@ -92,3 +92,14 @@ class TestPlayIterator(unittest.TestCase):
mock_inventory.get_hosts.return_value = ['host0','host1','host2','host3','host4','host5','host6','host7','host8','host9']
self.assertEqual(pbe._get_serialized_batches(play), [['host0','host1'],['host2','host3'],['host4','host5'],['host6','host7'],['host8','host9']])
# Test when serial percent is under 1.0
playbook = Playbook.load(pbe._playbooks[2], variable_manager=mock_var_manager, loader=fake_loader)
play = playbook.get_plays()[0]
mock_inventory.get_hosts.return_value = ['host0','host1','host2']
self.assertEqual(pbe._get_serialized_batches(play), [['host0'],['host1'],['host2']])
# Test when there is a remainder for serial as a percent
playbook = Playbook.load(pbe._playbooks[2], variable_manager=mock_var_manager, loader=fake_loader)
play = playbook.get_plays()[0]
mock_inventory.get_hosts.return_value = ['host0','host1','host2','host3','host4','host5','host6','host7','host8','host9','host10']
self.assertEqual(pbe._get_serialized_batches(play), [['host0','host1'],['host2','host3'],['host4','host5'],['host6','host7'],['host8','host9'],['host10']])