Is it possible to identify the Host cloud provider/Platform from kubernetes Pods? If so, how?
Right now, I am only looking for google cloud, aws and azure. Do they mount any specific file on a pod or do they set any specific Environment variable, from where I can identify the cloud provider/platform?
I am not looking for a generic way, different ways to find out different cloud providers is also fine at this moment.
There are no environment variables or mounts that i know of, but the linux kernel version string can give you a hint. The version info provided by uname or cat /proc/version actually is of the node not of the pod.
For example on Azure kubectl exec my-pod-name -- uname -r yields:
4.15.0-1018-azure
On GKE you should see something like
4.15.0-1018-gke
And AWS got
4.15.0-1018-aws
Using awk you can then filter out the cloud provider. This yields azure, gke or aws when run inside a pod:
uname -r|awk -F"-" '{print $3}'