Public bug reported:
I have a short cron job to check the status of an openvpn tunnel every
so often and restart the link if it seems lost.
*/5 * * * * ping -c1 172.16.30.1 >/dev/null 2>&1 || PATH=$PATH:/sbin
/etc/init.d/openvpn restart >/dev/null 2>&1
Most of the time this works okay. However, occasionally it goes haywire
in that the script does not think any OpenVPN process is running:
# /etc/init.d/openvpn stop
* Stopping virtual private network daemon(s)...
* No VPN is running.
But actually thousands of derelict OpenVPN processes are running, consuming
resources on the server and consuming much bandwidth:
# ps ax |grep openvpn | wc -l
1045
# ps ax |grep openvpn | head
303 ? Ss 0:04 /usr/sbin/openvpn --writepid
/var/run/openvpn.tun0-client.pid --daemon ovpn-tun0-client --status
/var/run/openvpn.tun0-client.status 10 --cd /etc/openvpn --config
/etc/openvpn/tun0-client.conf --script-security 2
358 ? Ss 0:03 /usr/sbin/openvpn --writepid
/var/run/openvpn.tun0-client.pid --daemon ovpn-tun0-client --status
/var/run/openvpn.tun0-client.status 10 --cd /etc/openvpn --config
/etc/openvpn/tun0-client.conf --script-security 2
410 ? Ss 0:03 /usr/sbin/openvpn --writepid
/var/run/openvpn.tun0-client.pid --daemon ovpn-tun0-client --status
/var/run/openvpn.tun0-client.status 10 --cd /etc/openvpn --config
/etc/openvpn/tun0-client.conf --script-security 2
[...]
These processes must be killed manually.
** Affects: openvpn (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1193878
Title:
Init script loses track of openvpn processes sometimes
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