Tell the pacemaker what he's doing?

Question

linux

What does the pacemaker do? I can't figure out what operations it performs in the cluster.
I want to set it up so that if one machine crashes, my script will run on the other.
thank.

Answer 1

Pacemaker is a cluster resource manager with the following main features:
Detection and recovery of failures at the level of nodes and services;
Storage independent: no shared drive required;
Independence from resource types: everything that can be scripted can be clustered;
Support for STONITH (Shoot-The-Other-Node-In-The-Head) - drugs for Split-Brain ;);
Support for clusters of any size;
Support for both quorum and resource-dependent clusters;
Support for almost any redundant configuration;
Automatic config replication to all cluster nodes;
Ability to set the order of launching resources, as well as their compatibility on the same node;
Support for advanced resource types: clones (running on multiple nodes) and with additional states (master/slave, etc.);
A single cluster shell (crm), unified, scripting.