Fetching source Pod IP through header

General Discussions
,
1

Cluster information:

Kubernetes version:
Cloud being used: GCP

How do I get the source pod IP from which the request originated from?. If pod1 sends a HTTP request to pod2, is there any information that can be fetched from headers indicating the IP of pod1 as the origin of request?.

I tried the externalTrafficPolicy-Local, but that only helps in identifying the IP of the ingress traffic(through X-Forwarded-For). I would need to know the details of traffic within the cluster

2

Is this from a pod in the cluster to anothert pod in the cluster directly? Or is it going up and out to a load-balancer (internal or external? L4 or HTTP?)

3

@thockin , Pod in the cluster to another pod in the cluster directly.

4

Then the source IP in the packet is the source IP. externalTrafficPolicy is for traffic from outside of the cluster.

5

Instead of packet capturing, is there a way add this IP to HTTP headers?

6

There’s no magic packet processing (and especially not HTTP-aware) being done here - it’s your pod to your other pod.