Configuring autoscaler.xml

Sample configuration

<configuration>
	<autoscaler>
		<rulesEvaluator>
			<schedule>
				<initialDelay>30</initialDelay>
				<period>15</period>
			</schedule>
		</rulesEvaluator>
		<cloudController>
			<hostname>CC_HOSTNAME</hostname>
			<port>CC_LISTEN_PORT</port>
            		<clientTimeout>300000</clientTimeout>
		</cloudController>
        	<stratosManager>
			<hostname>SM_HOSTNAME</hostname>
			<port>SM_LISTEN_PORT</port>
            		<clientTimeout>300000</clientTimeout>
		</stratosManager>
		<member>
			<expiryTimeout>900000</expiryTimeout>
		</member>
	</autoscaler>
</configuration>

Element definitions

The following are the configurations in the autoscaler.xmlfile:

Rules evaluator

The scheduler that runs within the Rules Evaluator will evaluate the Autoscaling rules periodically. The Scheduler needs to be configured with the initialDelay and period.

XML Element	Description	Default Value	Mandatory/ Optional
`<initialDelay>`	The Scheduler will always start after the Auto-scaler starts and after the time period defined in this element. This element needs to be specified in seconds.	30	Mandatory
`<period>`	The Scheduler will evaluate the rules based on the time period specified in this element. This element needs to be specified in seconds.	15	Mandatory

Cloud Controller client

There is a Cloud Controller client located within the Autoscaler, which calls the Cloud Controller API. The Cloud Controller client connection details need to be configured in the Autoscaler configuration.

XML Element	Description	Default Value	Mandatory/ Optional
`<hostname>`	Cloud Controller hostname	N/A	Mandatory
`<port>`	Cloud Controller port	N/A	Mandatory
`<clientTimeout>`	This element defines the service timeout period that will be applicable in the event there is no response from the Cloud Controller API.	300000	Mandatory

Stratos Manager client

There is a Stratos Manager client located within the Autoscaler, which calls the Stratos Manager API. The Stratos Manager client connection details need to be configured in the Autoscaler configuration.

XML Element	Description	Default Value	Mandatory/ Optional
`<hostname>`	Stratos Manager hostname	N/A	Mandatory
`<port>`	Stratos Manager port	N/A	Mandatory
`<clientTimeout>`	This element defines the service timeout period that will be applicable in the event there is no response from the Stratos Manager API.	300000	Mandatory

Member timeout

When a new instance is started, it will be marked as a pending member. If the instance does not get activated within a specific time period, the Auto-scaler will terminate the instance. The expiryTimeout needs to be specified to define the termination time period.

XML Element	Description	Default Value	Mandatory/ Optional
`<expiryTimeout>`	This element defines the member timeout period. The `expiryTimeout` needs to be defined in seconds.	900000	Mandatory