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monit: Set a high timeout waiting for status changes

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Instead of waiting for up to a certain number of retries we set a high
timeout and only re-check every five seconds. Certain services can
take a minute or more to start and we want to avoid waisting resources
by polling too often.
This commit is contained in:
Björn Andersson 2015-11-29 22:45:39 +08:00 committed by Matt Clay
parent 69e9bd3406
commit d577fedc26
1 changed files with 16 additions and 16 deletions
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32
lib/ansible/modules/extras/monitoring/monit.py
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@ -18,7 +18,7 @@
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
#
from time import sleep
import time
DOCUMENTATION = '''
---
@ -39,12 +39,13 @@ options:
required: true
default: null
choices: [ "present", "started", "stopped", "restarted", "monitored", "unmonitored", "reloaded" ]
max_retries:
timeout:
description:
- If there are pending actions for the service monitoried by monit Ansible will retry this
many times to perform the requested action. Between each retry Ansible will sleep for 1 second.
- If there are pending actions for the service monitored by monit, then Ansible will check
for up to this many seconds to verify the the requested action has been performed.
Ansible will sleep for five seconds between each check.
required: false
default: 10
default: 300
version_added: "2.0"
requirements: [ ]
author: "Darryl Stoflet (@dstoflet)"
@ -58,7 +59,7 @@ EXAMPLES = '''
def main():
arg_spec = dict(
name=dict(required=True),
max_retries=dict(default=10, type='int'),
timeout=dict(default=300, type='int'),
state=dict(required=True, choices=['present', 'started', 'restarted', 'stopped', 'monitored', 'unmonitored', 'reloaded'])
)
@ -66,7 +67,7 @@ def main():
name = module.params['name']
state = module.params['state']
max_retries = module.params['max_retries']
timeout = module.params['timeout']
MONIT = module.get_bin_path('monit', True)
@ -88,23 +89,22 @@ def main():
module.run_command('%s %s %s' % (MONIT, command, name), check_rc=True)
return status()
def wait_for_monit_to_stop_pending(sleep_time=1):
"""Fails this run if there is no status or it's pending/initalizing for max_retries"""
running_status = status()
retries = 0
def wait_for_monit_to_stop_pending():
"""Fails this run if there is no status or it's pending/initalizing for timeout"""
timeout_time = time.time() + timeout
sleep_time = 5
running_status = status()
while running_status == '' or 'pending' in running_status or 'initializing' in running_status:
if retries >= max_retries:
if time.time() >= timeout_time:
module.fail_json(
msg='too many retries waiting for empty, "pending", or "initiating" status to go away ({0})'.format(
msg='waited too long for "pending", or "initiating" status to go away ({0})'.format(
running_status
),
retries=retries,
state=state
)
sleep(sleep_time)
retries += 1
time.sleep(sleep_time)
running_status = status()
if state == 'reloaded':