[Bug 1494141] [NEW] HAProxy 1.5 init script does not terminate processes

[Launchpad Bug Tracker]

You have been subscribed to a public bug:

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 at 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 at mylinux:~# service haproxy stop
 * Stopping haproxy haproxy                                                                                   [ OK ]

root at mylinux:~# service haproxy status
haproxy not running.

root at 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 at mylinux:~# killall haproxy

root at 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 at mylinux:~# service haproxy start
 * Starting haproxy haproxy                                                                                   [ OK ]

root at 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 at mylinux:~# service haproxy restart
 * Restarting haproxy haproxy                                                                                 [ OK ]

root at 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
-- 
HAProxy 1.5 init script does not terminate processes
https://bugs.launchpad.net/bugs/1494141
You received this bug notification because you are a member of Ubuntu Backporters, which is subscribed to trusty-backports.