January 28, 2023
The Kubernetes API is your route to inspecting and managing your cluster’s operations. You can consume the API using the Kubectl CLI, tools such as curl, or the official integration libraries for popular programming languages. The API is available to applications within your cluster too. Kubernetes Pods are automatically given access to the API and…

The Kubernetes API is your route to inspecting and managing your cluster’s operations. You can consume the API using the Kubectl CLI, tools such as curl, or the official integration libraries for popular programming languages.

The API is available to applications within your cluster too. Kubernetes Pods are automatically given access to the API and can authenticate using a provided service account. You perform interactions by consuming the injected environment variables and certificate files to make connections from the client of your choice.

Why Access The Kubernetes API Within Pods?

There are several use cases for in-Pod API access. This technique allows applications to dynamically inspect their environment, apply Kubernetes changes, and collect control plane metrics that provide performance insights.

Some organizations develop their own tooling around Kubernetes. They might deploy a special in-cluster application that uses the API to expose additional functionality. Operating from within the cluster can be safer than making API calls from an external script as you don’t need to open up your environment or share service accounts and authentication tokens.

Using the API Client Libraries

The easiest and recommended…

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