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[cloud] Avoid failures in RDS modyue due to throttling while waiting (#22271)

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1. Check less aggressively for resources that take a long time to return
(some resources can take an hour or more).
2. Handle throttling when checking for resources, and back off quickly
when it occurs.
This commit is contained in:
Robin Miller 2017-03-06 14:19:59 -06:00 committed by Ryan Brown
parent 43aef4e868
commit 9c20182bdf
1 changed files with 14 additions and 4 deletions
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18
lib/ansible/modules/cloud/amazon/rds.py
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@ -313,6 +313,8 @@ EXAMPLES = '''
import sys
import time
from ansible.module_utils.ec2 import AWSRetry
try:
import boto.rds
HAS_BOTO = True
@ -650,23 +652,31 @@ class RDS2Snapshot:
def await_resource(conn, resource, status, module):
wait_timeout = module.params.get('wait_timeout') + time.time()
start_time = time.time()
wait_timeout = module.params.get('wait_timeout') + start_time
check_interval = 5
while wait_timeout > time.time() and resource.status != status:
time.sleep(5)
time.sleep(check_interval)
if wait_timeout <= time.time():
module.fail_json(msg="Timeout waiting for RDS resource %s" % resource.name)
if module.params.get('command') == 'snapshot':
# Temporary until all the rds2 commands have their responses parsed
if resource.name is None:
module.fail_json(msg="There was a problem waiting for RDS snapshot %s" % resource.snapshot)
resource = conn.get_db_snapshot(resource.name)
# Back off if we're getting throttled, since we're just waiting anyway
resource = AWSRetry.backoff(tries=5, delay=20, backoff=1.5)(conn.get_db_snapshot)(resource.name)
else:
# Temporary until all the rds2 commands have their responses parsed
if resource.name is None:
module.fail_json(msg="There was a problem waiting for RDS instance %s" % resource.instance)
resource = conn.get_db_instance(resource.name)
# Back off if we're getting throttled, since we're just waiting anyway
resource = AWSRetry.backoff(tries=5, delay=20, backoff=1.5)(conn.get_db_instance)(resource.name)
if resource is None:
break
# Some RDS resources take much longer than others to be ready. Check
# less aggressively for slow ones to avoid throttling.
if time.time() > start_time + 90:
check_interval = 20
return resource