K
Q

Is possible to access to pod information from inside the container?

6/1/2017

I have a deployment configured with 5 replicas. I want to know inside each running container the name of the pod replica.

When I execute:

kubectl get pods

NAME                   READY     STATUS    RESTARTS   AGE
test-581957695-cbjtm   1/1       Running   3          1d
test-581957695-dnv8s   1/1       Running   1          1d
test-581957695-fv467   1/1       Running   1          1d
test-581957695-m74lc   1/1       Running   0          1d
test-581957695-s6cx0   1/1       Running   1          1d

Is it possible to get the name "test-581957695-cbjtm" from inside the container?

Thank you.

-- Jxadro
kubernetes

Similar Questions

How to deserialize Kubernetes YAML file
Pods are not starting. NetworkPlugin cni failed to set up pod
How to install latest production-level Kubernetes in Ubuntu 14
Run istioctl alongside kubectl under fish shell

2 Answers

6/1/2017

Another option is to use Kubernetes Downward API. Using the API, you can expose pod/container information inside your container via a VolumeFile or Environment Variables. Currently, these are the pieces of information you can expose:

  • The node’s name
  • The Pod’s name
  • The Pod’s namespace
  • The Pod’s IP address
  • The Pod’s service account name
  • A Container’s CPU limit
  • A container’s CPU request
  • A Container’s memory limit
  • A Container’s memory request

In addition, the following information is available through DownwardAPIVolumeFiles,

  • The Pod’s labels
  • The Pod’s annotations

For more information please see, https://kubernetes.io/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/#the-downward-api

-- Alex Luis Arias
Source: StackOverflow
6/1/2017

You can use env vars to expose pod information to container.

https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/

-- oryades
Source: StackOverflow