[ClusterLabs] Clone process appears running whereas not

[Emmanuel Le Nohaïc]

Hi,

I am running an OpenVPN cluster active/passive with two nodes.

Cluster is configured to run clone openvpn processes on both nodes and
it runs fine with the VIP.

For the purpose of HA tests, I have to emulate processus start error on
the nodes (at boot time). So when I write deliberatly a bad config file
in my openvpn.conf and try to reboot one node, after system reboot
crm_mon says that clone is started on both nodes whereas openvpn process
is not running in background.

So when I reboot the first node, VIP and openvpn turn on the second node
where openvpn is not running.

Is there a solution to make sure that processus is running in background
to avoid that kind of errors.

Otherwise, is it possible if my services turn on the bad node to make
them return on good node when it appears online after reboot ? I would
not like to make preferences for one or other node, just to migrate
clients where service is really available.

Nodes are running Debian 8 with systemd. I think pacemaker reads output
of anything like "systemctl status openvpn" and thinks that process is
running because it appears running with :

systemctl status openvpn (on CENTRAL1)
● openvpn.service - OpenVPN service
   Loaded: loaded (/etc/systemd/system/openvpn.service; disabled)
   Active: active (exited) since ven. 2015-06-05 15:45:07 CEST; 11min ago
  Process: 732 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
 Main PID: 732 (code=exited, status=0/SUCCESS)

crm_mon (on CENTRAL1)
Last updated: Fri Jun  5 16:02:39 2015
Stack: corosync
Current DC: CENTRAL2 (version 1.1.12-a4478bd) - partition with quorum
2 nodes and 3 resources configured

Online: [ CENTRAL1 CENTRAL2 ]

VIP1    (ocf::heartbeat:IPaddr):        Started CENTRAL2
 Clone Set: openvpn-clone [openvpn]
     Started: [ CENTRAL1 CENTRAL2 ]


Here openvpn process does not run on CENTRAL1

systemctl list-units (on CENTRAL1)
openvpn.service       loaded active exited    OpenVPN service


Here is my cluster configuration :
root at CENTRAL1:~# crm configure show
node 167772161: CENTRAL1
node 167772162: CENTRAL2
primitive VIP1 IPaddr \
	params ip=192.168.1.200 cidr_netmask=32 nic="eth0:vip" \
	op monitor interval=10s timeout=20s
primitive openvpn service:openvpn \
	op monitor interval=1s
clone openvpn-clone openvpn \
	meta target-role=Started
colocation OVPN-VIP inf: ( openvpn-clone VIP1 )
property cib-bootstrap-options: \
	have-watchdog=false \
	dc-version=1.1.12-a4478bd \
	cluster-infrastructure=corosync \
	stonith-enabled=false \
	no-quorum-policy=ignore

If anyone has a solution. If you need more details or if my problem is
not clear (or my english) I can explain again :)

Thanks for your help.

-- 
Emmanuel Le Nohaïc
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