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This module adds shared support for generic cloud modules
In order to use this module, include it as part of a custom
module as shown below.
from ansible.module_utils.cloud import CloudRetry
The 'cloud' module provides the following common classes:
* CloudRetry
- The base class to be used by other cloud providers, in order to
provide a backoff/retry decorator based on status codes.
- Example using the AWSRetry class which inherits from CloudRetry.
@AWSRetry.exponential_backoff(retries=10, delay=3)
get_ec2_security_group_ids_from_names()
@AWSRetry.jittered_backoff()
get_ec2_security_group_ids_from_names()
iÿÿÿÿN( t wrapsi
i i< c s ‡ ‡ ‡ ‡ f d † } | S( sö Customizable exponential backoff strategy.
Args:
retries (int): Maximum number of times to retry a request.
delay (float): Initial (base) delay.
backoff (float): base of the exponent to use for exponential
backoff.
max_delay (int): Optional. If provided each delay generated is capped
at this amount. Defaults to 60 seconds.
Returns:
Callable that returns a generator. This generator yields durations in
seconds to be used as delays for an exponential backoff strategy.
Usage:
>>> backoff = _exponential_backoff()
>>> backoff
>>> list(backoff())
[2, 4, 8, 16, 32, 60, 60, 60, 60, 60]
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( ( R R R R s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt _exponential_backoff0 s i c s ‡ ‡ ‡ ‡ f d † } | S( s¬ Implements the "Full Jitter" backoff strategy described here
https://www.awsarchitectureblog.com/2015/03/backoff.html
Args:
retries (int): Maximum number of times to retry a request.
delay (float): Approximate number of seconds to sleep for the first
retry.
max_delay (int): The maximum number of seconds to sleep for any retry.
_random (random.Random or None): Makes this generator testable by
allowing developers to explicitly pass in the a seeded Random.
Returns:
Callable that returns a generator. This generator yields durations in
seconds to be used as delays for a full jitter backoff strategy.
Usage:
>>> backoff = _full_jitter_backoff(retries=5)
>>> backoff
>>> list(backoff())
[3, 6, 5, 23, 38]
>>> list(backoff())
[2, 1, 6, 6, 31]
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R R R s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt _full_jitter_backoffJ s t
CloudRetryc B s› e Z d Z d Z e d „ ƒ Z e d d „ ƒ Z e d d „ ƒ Z e d d d d d d „ ƒ Z
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s˜ CloudRetry can be used by any cloud provider, in order to implement a
backoff algorithm/retry effect based on Status Code from Exceptions.
c C s d S( sz Return the status code from the exception object
Args:
error (object): The exception itself.
N( ( t error( ( s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt status_code_from_exceptionn s c C s d S( s© Return True if the Response Code to retry on was found.
Args:
response_code (str): This is the Response Code that is being matched against.
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response_codet catch_extra_error_codes( ( s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt foundv s c s ‡ ‡ ‡ f d † } | S( s$ Retry calling the Cloud decorated function using the provided
backoff strategy.
Args:
backoff_strategy (callable): Callable that returns a generator. The
generator should yield sleep times for each retry of the decorated
function.
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base_classR R t formatt strt syslogt LOG_INFOt timeR ( t argst kwargsR t eR t msg( t backoff_strategyR t clst f( s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt
retry_funcˆ s ( R ( R# R$ ( R! R R" ( R# s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt deco‡ s $( ( R" R! R R% ( ( R! R R" s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt _backoff~ s i
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Retry calling the Cloud decorated function using an exponential backoff.
Kwargs:
retries (int): Number of times to retry a failed request before giving up
default=10
delay (int or float): Initial delay between retries in seconds
default=3
backoff (int or float): backoff multiplier e.g. value of 2 will
double the delay each retry
default=1.1
max_delay (int or None): maximum amount of time to wait between retries.
default=60
R R R R ( R& R ( R" R R R R R ( ( s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt exponential_backoff s c C s% | j t d | d | d | ƒ | ƒ S( s
Retry calling the Cloud decorated function using a jittered backoff
strategy. More on this strategy here:
https://www.awsarchitectureblog.com/2015/03/backoff.html
Kwargs:
retries (int): Number of times to retry a failed request before giving up
default=10
delay (int): Initial delay between retries in seconds
default=3
max_delay (int): maximum amount of time to wait between retries.
default=60
R R R ( R& R ( R" R R R R ( ( s> /usr/lib/python2.7/site-packages/ansible/module_utils/cloud.pyt jittered_backoff³ s gš™™™™™ñ?c C s, | j d | d d | d | d d d | ƒ S( s
Retry calling the Cloud decorated function using an exponential backoff.
Compatibility for the original implementation of CloudRetry.backoff that
did not provide configurable backoff strategies. Developers should use
CloudRetry.exponential_backoff instead.
Kwargs:
tries (int): Number of times to try (not retry) before giving up
default=10
delay (int or float): Initial delay between retries in seconds
default=3
backoff (int or float): backoff multiplier e.g. value of 2 will
double the delay each retry
default=1.1
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