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.accessConfigs.natIP)')
Nothing more to it.