** Branch linked: lp:ubuntu/trusty-proposed/haproxy
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https://bugs.launchpad.net/bugs/1038139
Title:
Missing running check on init script
Status in “haproxy” package in Ubuntu:
Fix Released
Status in “haproxy” source package in Precise:
Confirmed
Status in “haproxy” source package in Trusty:
Fix Committed
Status in “haproxy” source package in Utopic:
Fix Released
Bug description:
========================================================
SRU Justification:
Impact: 'service haproxy stop' returns 4 if haproxy was already stopped.
Development fix: check whether haproxy is running before trying to kill it
Stable fix: same as development fix
Test Case:
sudo service haproxy start
sudo killall -9 haproxy
sudo service haproxy stop
echo $?
~=> this should print 0, not 4
sudo service haproxy start
sudo service haproxy stop
~=> make sure this still correctly prints 0.
Regression potential: if done wrongly we could further break the haproxy
service stop.
========================================================
Hi, this is the relevant version information:
# lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
dpkg -l haproxy|tail -1
ii haproxy 1.4.18-0ubuntu1
fast and reliable load balancing reverse proxy
When I issue a stop to haproxy via the init script, on line 49 it tries to
kill the process and returns 4 in case of failure, which then after iis the
exit status of the script itself.
There are many reasons why stopping a process may fail, one of them is that
the process wasn't actually running. In that case, I think the exit status of
stop should be 0, since the process is stopped.
This caused problems in the following scenario: haproxy governed by
pacemaker if the haproxy process stops abruptly for some reason (crash,
oom-killer), pacemaker will try to stop and start it again, but it will fail to
stop (exit 4, expected 0).
To work around this, I added a check on the init script to see if the process
was running, see patch attached.
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