Executing a program when a resource fails
A very powerful new feature was recently added to Overseer network monitoring software, in 5.0.101. This feature is the Overseer ‘Actions’ system. Actions are processes that can be triggered when monitoring– typically when a resource fails, or new events are available. Currently the only action type, is to execute a program– but being able to execute a program with parameters is an incredibly powerful feature, enabling you to do almost anything.
Actions are configured under Manage->Actions. You can also ‘test’ an action, making it easier to get your parameters just right. Once you have an action defined, you must link this action to a resource. To do so, edit a resource and choose the ‘Actions’ option in the left tree. You can then use the ‘Add’ button to choose the action you’d like, along with the trigger type. Now, whenever that instance(such as ‘first failure’ or ‘every failure’) occurs for that resource, the action will be executed.
Additionally, under the ‘History’ tab for a resource, you can see the full detail of any actions that are triggered– both the input(command line, including parameters) as well as the output(stdout and stderr from your executed program).