Hi Slava,
do you have at least one another host in the same cluster or DC which doesn't have connection issues (in status Up or Maintenance)?
If so, please turn on debug logging for power management part using following command:
/usr/share/ovirt-engine-wildfly/bin/jboss-cli.sh --controller=
127.0.0.1:8706 --connect --user=admin@internal
and enter following inside jboss-cli command prompt:
/subsystem=logging/logger=org.ovirt.engine.core.bll.pm:add
/subsystem=logging/logger=org.ovirt.engine.core.bll.pm:write-attribute(name=level,value=DEBUG)
quit
Afterwards you will see more details in engine.log why other hosts were rejected during fence proxy selection process.
Btw above debug log changes are not permanent, they will be reverted on ovirt-engine restart or using following command:
/usr/share/ovirt-engine-wildfly/bin/jboss-cli.sh --controller=
127.0.0.1:8706 --connect --user=admin@internal '/subsystem=logging/logger=org.ovirt.engine.core.bll.pm:remove'
Regards
Martin Perina