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OpenStack Networking (Neutron)
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John Schwarz 977d254cc6 Throttle SIGHUPs to keepalived 
Multiple SIGHUPs in quick succession might cause the master keepalived
to forfeit its mastership (which will cause keepalived to remove IPs of
its external devices, severing connectivity). This can happen when, for
example, associating or disassociating multiple floatingips.

The patch makes the agent throttle SIGHUP sent to keepalived: the very first
SIGHUP is always sent; as for subsequent signals, they are delayed till
agent threshold is reached. (It's 3 seconds by default.)

As an example, when three consequent router updates trigger keepalived
respawn then:
* the very first signal is sent as usual;
* the second signal is deferred and sent in up to 3 seconds since the
  first signal;
* the third signal is ignored, though the change that triggered it will
  be correctly applied by the second signal handler when it is triggered
  after threshold delay.

If the last time a spawn request occurred is older than current-time
minus threshold then there is no delay.

Co-Authored-By: Jakub Libosvar <libosvar@redhat.com>
Co-Authored-By: Cedric Brandily <zzelle@gmail.com>
Co-Authored-By: Ihar Hrachyshka <ihrachys@redhat.com>

Closes-Bug: 1647432
Change-Id: I2955e0de835458a2eea4dd088addf33b656f8670
 		2017-03-28 03:37:09 +00:00
api-ref Fix some typos 2016-06-28 22:46:19 +02:00
bin XenAPI: add support for conntrack with XenServer 2016-09-23 02:34:25 +00:00
devstack Merge "devstack: switch to new NEUTRON_* variables" 2017-03-21 13:17:11 +00:00
doc Merge "Neutron Feature Classification" 2017-03-20 19:25:19 +00:00
etc Merge "Add PD support in HA router" 2017-03-15 07:25:35 +00:00
neutron Throttle SIGHUPs to keepalived 2017-03-28 03:37:09 +00:00
rally-jobs Trim rally scenario sizes 2017-03-15 04:27:42 +00:00
releasenotes Merge "Switch ns-metadata-proxy to haproxy" 2017-03-14 17:32:13 +00:00
tools Fix bashate warnings 2017-03-07 13:32:04 -05:00
.coveragerc Cleanup coverage configuration 2016-10-17 17:06:19 +05:30
.gitignore Automatically generate neutron core configuration files 2015-11-27 15:22:59 +00:00
.gitreview Fix .gitreview to not point at a branch 2015-08-17 13:51:51 -06:00
.mailmap Add mailmap entry 2014-05-16 13:40:04 -04:00
.pylintrc Fix typo in .pylintrc file 2017-02-09 01:07:07 +00:00
.testr.conf Allow more time for DB migration tests 2016-09-21 20:54:41 -04:00
CONTRIBUTING.rst Make crystal clear how to contribute/approach the neutron community 2016-10-28 11:49:44 -07:00
HACKING.rst Merge "Replace assertEqual(None, *) with assertIsNone in tests" 2016-11-22 02:15:19 +00:00
LICENSE Adding Apache Version 2.0 license file. This is the official license agreement under which Quantum code is available to 2011-08-08 12:31:04 -07:00
README.rst Show team and repo badges on README 2016-11-25 15:35:21 +01:00
TESTING.rst Merge "TrivialFix: Modify the spelling mistake" 2017-02-03 09:59:05 +00:00
babel.cfg Use babel to generate translation file 2013-01-24 00:20:32 +08:00
bindep.txt Switch ns-metadata-proxy to haproxy 2017-03-08 15:20:50 +00:00
requirements.txt Merge "Don't return null-byte separated string from ExternalProcess.cmdline()" 2017-03-20 23:41:08 +00:00
run_tests.sh Add bashate support 2017-02-25 06:29:55 +00:00
setup.cfg Merge "Switch ns-metadata-proxy to haproxy" 2017-03-14 17:32:13 +00:00
setup.py Updated from global requirements 2017-03-04 11:19:58 +00:00
test-requirements.txt Updated from global requirements 2017-03-04 11:19:58 +00:00
tox.ini Fix bashate warnings 2017-03-07 13:32:04 -05:00

README.rst

Team and repository tags

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Welcome!

To learn more about neutron:

Get in touch via email. Use [Neutron] in your subject.

To learn how to contribute:

CONTRIBUTING.rst