Enabling Cloud Services

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23.1 Enabling Cloud Services

The following demonstrates the process of enabling Moab support of the cloud services discussed in this chapter:

To configure Moab for cloud services

In the Moab configuration file, set HIDEVIRTUALNODES to TRANSPARENT and VMTRACKING to TRUE.
```
HIDEVIRTUALNODES  TRANSPARENT
```
```
VMTRACKING        TRUE
```
HIDEVIRTUALNODES enables VM management and reveals hypervisors, and VMTRACKING turns on Moab's ability to use VM-tracking jobs to represent VMs in the job queue.
Optional: By default, Moab takes no action when a VM expires or becomes stale (has not been reported by the RM for five 30-second iterations). To customize this behavior, modify or add the following parameters in moab.cfg:
- ENABLEVMDESTROY - causes Moab to automatically destroy VMs when their walltime expires or , if VMSTALEACTION is DESTROY, when they become stale.
- VMSTALEACTION - specifies what action Moab should take when a VM becomes stale.
- VMSTALEITERATIONS - specifies how many consecutive iterations a VM must not be reported by the RM for Moab to consider it stale.
- RMPOLLINTERVAL - sets the length of an iteration.
In the following example, Moab destroys stale VMs after three 60-second iterations.
```
RMPOLLINTERVAL    60
```
```
...
```
```
VMSTALEACTION     DESTROY
```
```
ENABLEVMDESTROY   TRUE
```
```
VMSTALEITERATIONS 3
```

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