Do Google Compute instances have a stable public DNS name?

问题

This is a question in two parts:

• Do GCE instances have a stable public DNS name? The default DNS name for instance with public IP a.b.c.d seems to be d.c.b.a.bc.googleusercontent.com

• If yes, what's the best way to obtain this information? Here's the hack I've been using thus far:

  EXTERNAL_IP=$(curl -s http://bot.whatismyipaddress.com/)
  EXTERNAL_DNS=$(dig +short -x ${EXTERNAL_IP})
  

回答1:

reverse lookup is okay to do, for IP address you would probably prefer using gcutil https://developers.google.com/compute/docs/gcutil/tips

EXTERNAL_IP=$(gcutil getinstance --format=csv --zone=[your_zone] [your_instance] | grep external-ip | cut -d "," -f 2)

来源：https://stackoverflow.com/questions/17688956/do-google-compute-instances-have-a-stable-public-dns-name