/ Chapter 7. Adding or Modifying Resource Agents | ||||
|---|---|---|---|---|
 | 6.2. Manual Configuration of a Resource | 7.2. Writing OCF Resource Agents |  | |
/ Chapter 7. Adding or Modifying Resource Agents | ||||
|---|---|---|---|---|
| 6.2. Manual Configuration of a Resource | 7.2. Writing OCF Resource Agents | | |
All tasks that should be managed by a cluster must be available as a resource. There are two major groups that should be distinguished: resource agents and STONITH agents. For both categories, you can add your own agents, extending the abilities of the cluster to your own needs.
A cluster sometimes detects that one of the nodes is misbehaving and
needs to remove it. This is called fencing and is
commonly done with a STONITH resource. All STONITH resources reside
in /usr/lib/stonith/plugins on each node.
![[Warning]](admon/warning.png) | SSH and STONITH Are Not Supported |
|---|---|
It is impossible to know how SSH might react to other system problems. For this reason, SSH and STONITH agent are not supported for a production environment. | |
To get a list of all currently available STONITH devices (from the software side), use the command stonith -L.
Unfortunately, there is no documentation about writing STONITH agents
yet. If you want to write new STONITH agents, consult the examples
available in the source of the heartbeat-common
package.
