Is there a way to know from a command line shell if I am currently on a Google Compute Engine machine or somewhere else (development machine)?
Per the metadata docs:
You can easily detect if your applications or scripts are running within a Compute Engine instance by using the metadata server. When you make a request to the server, any response from the metadata server will contain the
Metadata-Flavor: Google
header. You can look for this header to reliably detect if you are running in Compute Engine.For example, the following curl request returns a
Metadata-Flavor: Google
header, indicating that the request is being made from within a Compute Engine instance.me@my-inst:~$ curl metadata.google.internal -i HTTP/1.1 200 OK Metadata-Flavor: Google Content-Type: application/text Date: Thu, 10 Apr 2014 19:24:27 GMT Server: Metadata Server for VM Content-Length: 22 X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGIN 0.1/ computeMetadata/
Here is python implementation via socket.getaddrinfo
import socket
def is_gce_instance():
"""Check if it's GCE instance via DNS lookup to metadata server.
"""
try:
socket.getaddrinfo('metadata.google.internal', 80)
except socket.gaierror:
return False
return True
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