OpenStack datasource does not deal with 404 Not Found correctly.If we boot a vm without userdata in OpenStack environment, CloudInit retry to get usedata when 404 Not Found returned. The GuestOS start up times will increase.I think it's not needed and a waste of time.
Cloud-Init LOG:
2018-03-19 11:09:16,391 - url_helper.py[DEBUG]: [0/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:16,414 - url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
2018-03-19 11:09:17,415 - url_helper.py[DEBUG]: [1/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:17,445 - url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
2018-03-19 11:09:18,446 - url_helper.py[DEBUG]: [2/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:18,468 - url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
2018-03-19 11:09:19,470 - url_helper.py[DEBUG]: [3/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:19,535 - url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
2018-03-19 11:09:20,536 - url_helper.py[DEBUG]: [4/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:20,556 - url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
2018-03-19 11:09:21,557 - url_helper.py[DEBUG]: [5/6] open 'http://169.254.169.254:80/openstack/2015-10-15/user_data' with {'url': 'http://169.254.169.254:80/openstack/2015-10-15/user_data', 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 50.0} configuration
2018-03-19 11:09:21,584 - openstack.py[DEBUG]: Failed reading optional path http://169.254.169.254:80/openstack/2015-10-15/user_data due to: 404 Client Error: Not Found
Go through the code, I found the following logic which i think it's not correct.
cloudinit/sources/helpers/openstack.py
def should_retry_cb(_request_args, cause):
try:
code = int(cause.code)
if code >= 400:
return False
except (TypeError, ValueError):
# Older versions of requests didn't have a code.
pass
return True
response = url_helper.readurl(path,
retries=self.retries,
ssl_details=self.ssl_details,
timeout=self.timeout,
exception_cb=should_retry_cb)
1.When 404 returned, do not need to retry.
2.exception_cb=should_retry_cb need to be changed to exception_cb=should_skip_retry_cb. May be a Bug here:)
