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On a new installation of Ubuntu 14.04.3 LTS I installed HAProxy 1.5 from
trusty-backports (1.5.4-1ubuntu2.1~ubuntu14.04.1).
When I restarted HAProxy, I got random HTTP 503 although the backend
servers were all working fine. By checking netstat, I saw that HAProxy
was listening multiple times on the frontend ports.
It seems that the init script coming with the installation does not work
correctly. The processes are not terminated correctly when using stop
(or restart, in this matter, either).
Only with a kill I was able to correctly terminate the HAProxy
processes.
The following output should show more clarity:
root@mylinux:~# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
4221/haproxy
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
956/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
855/sshd
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
4221/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
4221/haproxy
tcp6 0 0 :::22 :::* LISTEN
855/sshd
root@mylinux:~# service haproxy stop
* Stopping haproxy haproxy
[ OK ]
root@mylinux:~# service haproxy status
haproxy not running.
root@mylinux:~# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
4221/haproxy
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
956/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
855/sshd
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
4221/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
4653/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
4221/haproxy
tcp6 0 0 :::22 :::* LISTEN
855/sshd
root@mylinux:~# killall haproxy
root@mylinux:~# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
956/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
855/sshd
tcp6 0 0 :::22 :::* LISTEN
855/sshd
root@mylinux:~# service haproxy start
* Starting haproxy haproxy
[ OK ]
root@mylinux:~# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
8205/haproxy
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
956/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
855/sshd
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
8205/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
8205/haproxy
tcp6 0 0 :::22 :::* LISTEN
855/sshd
root@mylinux:~# service haproxy restart
* Restarting haproxy haproxy
[ OK ]
root@nzzad-lb01-test:~# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
8286/haproxy
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
8205/haproxy
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
956/nginx
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
855/sshd
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
8286/haproxy
tcp 0 0 0.0.0.0:8090 0.0.0.0:* LISTEN
8205/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
8286/haproxy
tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
8205/haproxy
tcp6 0 0 :::22 :::* LISTEN
855/sshd
** Affects: trusty-backports
Importance: Medium
Assignee: Louis Bouchard (louis-bouchard)
Status: In Progress
** Tags: haproxy
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HAProxy 1.5 init script does not terminate processes
https://bugs.launchpad.net/bugs/1494141
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