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HAProxy - Load balancer
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Frédéric Lécaille 045e0d4b3b BUG/MINOR: peers: Really close the sessions with no heartbeat. 
645635d commit was not sufficient to implement the heartbeat feature.
When no heartbeat was received before its timeout has expired the session was not
closed due to the fact that process_peer_sync() which is the task responsible of
handling the heartbeat and session expirations only checked the heartbeat timeout,
and sent a heartbeat message if it has expired. This has as side
effect to leave the session opened. On the remote side, a peer which receives a
heartbeat message, even if not supported, does not close the session.
Furthermore it not sufficient to update ->reconnect peer member field to schedule
a peer session release.

With this patch, a peer is flagged as alive as soon as it received peer protocol
messages (and not only heartbeat messages). When no updates must be sent,
we first check the reconnection timeout (->reconnect peer member field). If expired,
we really shutdown the session if the peer is not alive, but if the peer seen as alive,
we reset this flag and update the ->reconnect for the next period.
If the reconnection timeout has not expired, then we check the heartbeat timeout
which is there only to emit heartbeat messages upon expirations. If expired, as before this
patch we increment the heartbeat timeout by 3s to schedule the next heartbeat message
then we emit a heartbeat message waking up the peer I/O handler.
In every cases we update the task expiration to the earlier time between the
reconnection time and the heartbeat timeout time so that to be sure to check
again these two ->reconnect and ->heartbeat timers.
2019-03-26 10:51:12 +01:00
.github/ISSUE_TEMPLATE DOC: add github issue templates 2019-01-17 22:53:55 +01:00
contrib CONTRIB: debug: report the CS and CF's EOI flags 2019-03-25 18:34:28 +01:00
doc [RELEASE] Released version 2.0-dev2 2019-03-26 05:40:51 +01:00
ebtree CLEANUP: fix typos in comments in ebtree 2018-11-18 22:23:15 +01:00
examples [RELEASE] Released version 2.0-dev2 2019-03-26 05:40:51 +01:00
include CLEANUP: task: only perform a LIST_DEL() when the list is not empty 2019-03-25 18:10:53 +01:00
reg-tests Revert "REGTEST: Enable reg tests with HEAD HTTP method usage." 2019-03-15 15:07:12 +01:00
scripts SCRIPTS: add the issue tracker URL to the announce script 2019-01-29 06:51:16 +01:00
src BUG/MINOR: peers: Really close the sessions with no heartbeat. 2019-03-26 10:51:12 +01:00
tests CLEANUP: fix a misspell in tests/filltab25.c 2018-11-18 22:23:15 +01:00
.gitignore DOC: split the README into README + INSTALL 2018-12-16 22:30:57 +01:00
CHANGELOG [RELEASE] Released version 2.0-dev2 2019-03-26 05:40:51 +01:00
CONTRIBUTING DOC: Fix typos in README and CONTRIBUTING 2018-11-12 08:54:12 +01:00
INSTALL CLEANUP: wurfl: remove dead, broken and unmaintained code 2019-03-05 13:46:12 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS DOC: fix reference to map files in MAINTAINERS 2018-10-17 04:21:04 +02:00
Makefile BUILD: Makefile: resolve LEVEL before calling run-regtests 2019-03-15 17:29:53 +01:00
README DOC: split the README into README + INSTALL 2018-12-16 22:30:57 +01:00
ROADMAP DOC: update the roadmap about priority queues 2018-08-10 17:12:04 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.0-dev2 2019-03-26 05:40:51 +01:00
VERSION [RELEASE] Released version 2.0-dev2 2019-03-26 05:40:51 +01:00

README 

The HAProxy documentation has been split into a number of different files for
ease of use.

Please refer to the following files depending on what you're looking for :

  - INSTALL for instructions on how to build and install HAProxy
  - LICENSE for the project's license
  - CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory :

  - doc/intro.txt for a quick introduction on HAProxy
  - doc/configuration.txt for the configuration's reference manual
  - doc/lua.txt for the Lua's reference manual
  - doc/SPOE.txt for how to use the SPOE engine
  - doc/network-namespaces.txt for how to use network namespaces under Linux
  - doc/management.txt for the management guide
  - doc/regression-testing.txt for how to use the regression testing suite
  - doc/peers.txt for the peers protocol reference
  - doc/coding-style.txt for how to adopt HAProxy's coding style
  - doc/internals for developer-specific documentation (not all up to date)