I want to see the IP address of my google function instance. I've tried to look request object's headers but couldn't find anything useful. Is there any way to find it?
I am using python SDK but I don't think this is language dependent.
3 Answers
Cloud Functions do not have a public IP address assigned to the function.
Cloud Function egress traffic is routed to a proxy which then forwards the traffic to the public Internet. The only method to determine the current public IP address is to call a public endpoint which returns the public IP address of the frontend to Cloud Functions.
Here is an example endpoint: https://api64.ipify.org/?format=json
If you want to have a outbound static IP with Cloud Functions, you can achieve this by configuration. 3 important steps
- Create a serverless VPC Connector and plug it to your Cloud Functions
- Set the egress param to "ALL" to route ALL (private and public IPs) the request from the Cloud Functions
- Configure a Cloud NAT and reserve IP(s) to use when you perform an external call. And you can use the John's answer to check if it works.
Just if someone needs this.
After doing the steps described by guillaume and exploring the link that also John suggested, I was able to get my cloud function's IP with the following python code:
from requests import get
ip = get('https://api.ipify.org').text
print(f'My public IP address is: {ip}')
In my case, I was looking to see if my cloud function had the same IP address as my NAT gateway since I need to put the IP in a whitelist and this helped me a lot!
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