You have created several pre-emptible Linux virtual machine instances using Google Compute Engine. You want to properly shut down your application before the virtual machines are preempted.
What should you do?
A. Create a shutdown script named k99.shutdown in the /etc/rc.6.d/ directory
B. Create a shutdown script registered as a xinetd service in Linux and configure a Stackdriver endpoint check to call the service
C. Create a shutdown script and use it as the value for a new metadata entry with the key shutdown-script in the Cloud Platform Console when you create the new virtual machine instance
D. Create a shutdown script, registered as a xinetd service in Linux, and use the gcloud compute instances add-metadata command to specify the service URL
as the value for a new metadata entry with the key shutdownscript-url
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B
C is correct, when the machines is getting shutdown (because a a preempted event) the shutdown script will be triggered and gracefully will terminate the local services on that machine.
C