Confirmed the test case, waiting for MP review now
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https://bugs.launchpad.net/bugs/1848902
Title:
haproxy in bionic can get stuck
Status in haproxy package in Ubuntu:
Fix Released
Status in haproxy source package in Bionic:
Triaged
Bug description:
[Impact]
* The master process will exit with the status of the last worker.
When the worker is killed with SIGTERM, it is expected to get 143 as an
exit status. Therefore, we consider this exit status as normal from a
systemd point of view. If it happens when not stopping, the systemd
unit is configured to always restart, so it has no adverse effect.
* Backport upstream fix - adding another accepted RC to the systemd
service
[Test Case]
* You want to install haproxy and have it running. Then sigterm it a lot.
With the fix it would restart the service all the time, well except
restart limit. But in the bad case it will just stay down and didn't
even try to restart it.
$ apt install haproxy
$ for x in {1..100}; do pkill -TERM -x haproxy ; sleep 0.1 ; done
$ systemctl status haproxy
[Regression Potential]
* This eventually is a conffile modification, so if there are other
modifications done by the user they will get a prompt. But that isn't a
regression. I checked the code and I can't think of another RC=143 that
would due to that "no more" detected as error. I really think other
than the update itself triggering a restart (as usual for services)
there is no further regression potential to this.
[Other Info]
* Fix already active in IS hosted cloud without issues since a while
* Also reports (comment #5) show that others use this in production as
well
---
On a Bionic/Stein cloud, after a network partition, we saw several
units (glance, swift-proxy and cinder) fail to start haproxy, like so:
root@juju-df624b-6-lxd-4:~# systemctl status haproxy.service
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/lib/systemd/system/haproxy.service; enabled; vendor
preset: enabled)
Active: failed (Result: exit-code) since Sun 2019-10-20 00:23:18 UTC; 1h
35min ago
Docs: man:haproxy(1)
file:/usr/share/doc/haproxy/configuration.txt.gz
Process: 2002655 ExecStart=/usr/sbin/haproxy -Ws -f $CONFIG -p $PIDFILE
$EXTRAOPTS (code=exited, status=143)
Process: 2002649 ExecStartPre=/usr/sbin/haproxy -f $CONFIG -c -q $EXTRAOPTS
(code=exited, status=0/SUCCESS)
Main PID: 2002655 (code=exited, status=143)
Oct 20 00:16:52 juju-df624b-6-lxd-4 systemd[1]: Starting HAProxy Load
Balancer...
Oct 20 00:16:52 juju-df624b-6-lxd-4 systemd[1]: Started HAProxy Load Balancer.
Oct 20 00:23:18 juju-df624b-6-lxd-4 systemd[1]: Stopping HAProxy Load
Balancer...
Oct 20 00:23:18 juju-df624b-6-lxd-4 haproxy[2002655]: [WARNING] 292/001652
(2002655) : Exiting Master process...
Oct 20 00:23:18 juju-df624b-6-lxd-4 haproxy[2002655]: [ALERT] 292/001652
(2002655) : Current worker 2002661 exited with code 143
Oct 20 00:23:18 juju-df624b-6-lxd-4 haproxy[2002655]: [WARNING] 292/001652
(2002655) : All workers exited. Exiting... (143)
Oct 20 00:23:18 juju-df624b-6-lxd-4 systemd[1]: haproxy.service: Main process
exited, code=exited, status=143/n/a
Oct 20 00:23:18 juju-df624b-6-lxd-4 systemd[1]: haproxy.service: Failed with
result 'exit-code'.
Oct 20 00:23:18 juju-df624b-6-lxd-4 systemd[1]: Stopped HAProxy Load Balancer.
root@juju-df624b-6-lxd-4:~#
The Debian maintainer came up with the following patch for this:
https://www.mail-archive.com/haproxy@formilux.org/msg30477.html
Which was added to the 1.8.10-1 Debian upload and merged into upstream 1.8.13.
Unfortunately Bionic is on 1.8.8-1ubuntu0.4 and doesn't have this patch.
Please consider pulling this patch into an SRU for Bionic.
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