Kubernetes Downward API Concepts: Difference between revisions
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* [[Kubernetes_Concepts#Subjects|Kubernetes Concepts]] | * [[Kubernetes_Concepts#Subjects|Kubernetes Concepts]] | ||
* [[Kubernetes_Storage_Concepts#downwardAPI|Kubernetes Storage Concepts]] | |||
=Overview= | =Overview= | ||
Revision as of 23:26, 18 June 2020
External
- https://kubernetes.io/docs/concepts/storage/volumes/#downwardapi
- https://kubernetes.io/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/
Internal
Overview
Kubernetes is exposing pod information to the containers running inside the pod through files, which are projected in the container by a mechanism known as the Downward API.
Example
This is how the pod name and namespace can be projected to be available to containers running inside the pod.
Declare a "downwardAPI" volume and mount it in the pod:
apiVersion: v1
kind: Pod
metadata:
name: loop
spec:
containers:
- name: loop
image: docker.io/ovidiufeodorov/loop:latest