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What is 308 permanent redirect Kubernetes?

The “308 Permanent Redirect” HTTP response status code in Kubernetes indicates a permanent redirect for a resource within a Kubernetes cluster.

When a client makes an HTTP request to a URL within a Kubernetes cluster, the server may respond with a 308 status code along with a new URL. This indicates that the requested resource has permanently moved to the provided new URL.

Let’s take a look at how this process works:

• First, the client sends an HTTP request to a URL in the Kubernetes cluster.
• Then, the server processing the request determines that the requested resource has been permanently moved to a new location.
• Now, rather than returning the requested resource directly, the server responds with a 308 Permanent Redirect status code and includes the new URL in the response headers. The new URL is usually in the Location header field.
• At this point, the client can automatically follow the redirect by sending a new request to the provided new URL.

Purpose of a 308 redirect

The 308 redirect lets the client know that the requested resource has been permanently moved to a different location, and the client should update its references accordingly.

Furthermore, unlike a 301 redirect, a 308 redirect makes sure that the client continues to use the original request method when following the redirect.

In relation to Kubernetes, this redirect can be used for several purposes. For example, if a Kubernetes resource, like a Pod or Service, is moved to a different namespace or cluster, a 308 redirect will inform clients about the new location and ensure they can access the resource.

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Conclusion

Today, our Support Techs introduced us to the 308 permanent redirect in Kubernetes.