In order to have heartbeat use the legacy configuration style, you have to specify crm no in the /etc/ha.d/ha.cf file. Follow the guidelines found on the documentation found online. Please note that this version is highly deprecated and no longer supported, thus the documentation may be incomplete or unmaintained. The following resources can be useful:
Below is the heartbeat configuration for the example we have described in this document.
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/etc/ha.d/ha.cf
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/etc/ha.d/haresources
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/etc/ha.d/authkeys
After setting up identical configuration files on both nodes, start the drbd and heartbeat system services on both nodes:
Make sure you also set the drbd and heartbeat services to start at boot time.