Makefile – Get Compute Engine Instance IP

I have a test that requires me to spin up a VM with a service running on port 80. I’d need to test if that service is working, but the machine itself is irrelevant, so I’m not bothering to give it a hostname. But I still need to test output on port 80. So I need the external IP address of the machine and nothing else.

Enter the dynamic data trick from my first Makefile post – again.  

So I grab the value and dump it to a variable:

TESTIP = $(shell gcloud compute instances describe $() --format='value[terminator=""](networkInterfaces[0].accessConfigs[0].natIP)')

Nothing more to it.

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