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corrected minor typos and hints
Heartbeat version 1.2.* has successfully been used in a lot of two-node-clusters around the world. As the codebase used in version 1.2.* is in production use for many years now, the code is very stable. At the time of writing, Heartbeat version 1.2.4 is the current version of the 1.2.* branch.
Get the tar.gz of the current version of the 1.2.* branch from http://linux-ha.org/download/index.html, at the time of this writing this is http://linux-ha.org/download/heartbeat-1.2.4.tar.gz. Use rpmbuild to build the package:
<pre>rpmbuild -ta heartbeat-1.2.4.tar.gz</pre>
After that, you find four rpm packes in /usr/src/redhat/RPMS/i386 (heartbeat-1.2.4-1.i386.rpm, heartbeat-ldirectord-1.2.4-1.i386.rpm, heartbeat-pils-1.2.4-1.i386.rpm, heartbeat-stonith-1.2.4-1.i386.rpm). In this example only heartbeat-1.2.4-1.i386.rpm is , heartbeat-pils-1.2.4-1.i386.rpm, and heartbeat-stonith-1.2.4-1.i386.rpm are needed.
=== Compiling DRBD userspace tools ===
As mentioned above, it is important to use the correct version of the DRBD userspace tools. When an OpenVZ kernel contains a new DRBD version, it is important that the DRBD API version of the userspace tools matches the API version of the DRBD module that is included in the OpenVZ kernel. The API versions can be found at http://svn.drbd.org/drbd/branches/drbd-0.7/ChangeLog. The best way is to always use the version of the DRBD userspace tools that matches the version of the DRBD module that is included in the OpenVZ kernel.
In this example the initial cluster installed installation contained OpenVZ kernel 2.6.8-022stab078.10, which contains the DRBD module 0.7.17. The steps below should show the update procedure to OpenVZ kernel 2.6.8-022stab078.14, which contains the DRBD module 0.7.20.
In the first step build the DRBD userspace tools version 0.7.20 on your buildmachine. Then stop Heartbeat and DRBD on the passive node (hint: you can use 'cat /proc/drbd' to get a hint which node is active and which one is passive):
<pre>
