Provider created custom APS application of 'External system' provisionig type.
This custom application cannot be installed in customer subscription, task fails in POA with the error message 'Cannot get value of DB_main_HOST variable'. See more details in the example below:
Task ID 1016339
Task name Executing configuration script for instance with id 1124 of service 'webmail' of instance with id 517 of APS application with id 301
Task description Executing configuration script for instance with id 1124 of service 'webmail' of instance with id 517 of APS application with id 301
Queue name aps_application_instance517
Method name taskExecuteApplicationInstanceScript
Execution status Failed
Start not earlier than Aug-17-2010 20:02
Finished Aug-17-2010 20:02
Output Execution of configuration script for service instance with id 1124 of instance with id 517 of application with id 301 failed
- returned value: -1 output: '<output xmlns="http://apstandard.com/ns/1/configure-output">
<message>Cannot get value of DB_main_HOST variable</message>
In current implementation POA does not support database service for applications of 'External system' provisioning type (such application provides only configuration scripts that create account/service in an external system).
If own database instance is not actually necessary for each application instance then application data may be stored in POA database instead.