[ClusterLabs] Beginner with STONITH Problem

[stefan.schmitz at farmpartner-tec.com]

Hello,

I am an absolute beginner trying to setup our first HA Cluster.
So far I have been working with the "Pacemaker 1.1 Clusters from 
Scratch" Guide wich worked for me perfectly up to the Point where I need 
to install and configure STONITH.

Curerent Situation is:2 Ubuntu Server as the cluster. Both of those 
Servers are virtual machines running on 2 Centos KVM Hosts.
Those are the devices or ressources we can use for a STONITH 
implementation. In this and other guides I do read a lot about external 
devices and in the "pcs stonith list" there are some XEN but sadly I 
cannot find anything about KVM. At this point I am stumped and have no 
clue in how to proceed, I am not even sure what further inforamtion I 
shopuld provide that would be useful for giving advise?

The current pcs status is:

# pcs status
Cluster name: pacemaker_cluster
WARNING: corosync and pacemaker node names do not match (IPs used in setup?)
Stack: corosync
Current DC: server2ubuntu1 (version 1.1.18-2b07d5c5a9) - partition with 
quorum
Last updated: Wed Jun 24 12:43:24 2020
Last change: Wed Jun 24 12:35:17 2020 by root via cibadmin on server4ubuntu1

2 nodes configured
12 resources configured

Online: [ server2ubuntu1 server4ubuntu1 ]

Full list of resources:

  Master/Slave Set: r0_pacemaker_Clone [r0_pacemaker]
      Masters: [ server4ubuntu1 ]
      Slaves: [ server2ubuntu1 ]
  Clone Set: dlm-clone [dlm]
      Stopped: [ server2ubuntu1 server4ubuntu1 ]
  Clone Set: ClusterIP-clone [ClusterIP] (unique)
      ClusterIP:0        (ocf::heartbeat:IPaddr2):       Started 
server4ubuntu1
      ClusterIP:1        (ocf::heartbeat:IPaddr2):       Started 
server4ubuntu1
  Master/Slave Set: WebDataClone [WebData]
      Masters: [ server2ubuntu1 server4ubuntu1 ]
  Clone Set: WebFS-clone [WebFS]
      Stopped: [ server2ubuntu1 server4ubuntu1 ]
  Clone Set: WebSite-clone [WebSite]
      Stopped: [ server2ubuntu1 server4ubuntu1 ]

Failed Actions:
* dlm_start_0 on server2ubuntu1 'not configured' (6): call=437, 
status=complete, exitreason='',
     last-rc-change='Wed Jun 24 12:35:30 2020', queued=0ms, exec=86ms
* r0_pacemaker_monitor_60000 on server2ubuntu1 'master' (8): call=438, 
status=complete, exitreason='',
     last-rc-change='Wed Jun 24 12:36:30 2020', queued=0ms, exec=0ms
* dlm_start_0 on server4ubuntu1 'not configured' (6): call=441, 
status=complete, exitreason='',
     last-rc-change='Wed Jun 24 12:35:30 2020', queued=0ms, exec=74ms


Daemon Status:
   corosync: active/disabled
   pacemaker: active/disabled
   pcsd: active/enabled



I have researched the shown dlm Problem but everything I have found says 
that configuring STONITH would solve that issue.
Could please someone advise on how to proceed?

Thank you in advance!

Kind regards
Stefan Schmitz