PACEMAKER

Installation

[ALL] installation pacemaker

sudo apt-get install pacemaker
edit /etc/default/corosync and enable corosync (START=yes) 

[ONE] generate corosync authkey

sudo corosync-keygen
(this can take a while if there's no enough entropy; download ubuntu iso image on the same machine while generating to speed it up or use keyboard to generate entropy)
copy /etc/corosync/authkey to all servers that will form this cluster (make sure it is owned by root:root and has 400 permissions). 

[ALL] configure corosync

In /etc/corosync/corosync.conf, replace bindnetaddr (by default it is 127.0.0.1), with the network address 
of your server,  replacing the last number by 0 to get the network address. For example, if your IP is 
192.168.1.101, then you would put 192.168.1.0.

[ALL] start corosync

sudo /etc/init.d/corosync start

[ALL] Install DRBD and other needed tools

sudo apt-get install linux-headers-server psmisc drbd8-utils

[ALL] Pacemaker soll drbd managen

sudo update-rc.d -f drbd remove

CRM

crmadmin

Kompelette CIB löschen

crmadmin -E