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Generic Execution plugin action - how to connect with dynamic host using ssh?


I'm trying to restart the apache or a java application servers after an incident related to "Application Process Unavailable or Shutdown". To do that, I need to connect with host related to incident, using SSH, and execute the following command : "service apache start", for example.

But, I,m configuring the Host parameter of GEP with the variable ${AGENT_HOST) in order to dinamically connect with a different hosts and It doesn't transform the variable to true hostname to make de connection properly.

Am I doing something wrong?

Error Message:

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2018-08-07 09:47:58 SEVERE [GenericExecutor@com.dynatrace.diagnostics.plugin.extendedexecutor.GenericExecutionPlugin.action] setup method: password authentication: IOException, stacktrace is ' exception occurred. Message = 'There was a problem while connecting to ${AGENT_HOST}:22'; Stacktrace is '''

2018-08-07 09:47:58 SEVERE [GenericExecutor@com.dynatrace.diagnostics.plugin.extendedexecutor.GenericExecutionPlugin.action] setup method: java.lang.IllegalStateException exception occurred. Message = 'Connection is not established!'; Stacktrace is ''