![]() ![]() If you want to get your hands dirty, there are some tools you can use to analyze and debug apps connected to a Kubernetes API. This will allow the user to send impersonation headers so the Kubernetes API will switch your authentication context to that impersonated user.įor regular clients and for production purposes, you only really have two options: client certificates or bearer tokens. If you already have certain credentials providing access to the Kubernetes API, those credentials can be used to “impersonate” users through authorization rules. Lastly, there is authentication through impersonation. Kublr, for example, uses this authentication method to proxy dashboard requests, web console requests, and provide a proxy Kubernetes API endpoint. This allows the Kubernetes API to know who they work with. That proxy can authenticate users and clients anyway it likes and will add user identifications into the request headers for requests that are sent to the Kubernetes API. ![]() It assumes that you start a proxy server, which is responsible for authenticating user requests and forwarding them to the Kubernetes API. One is using an auth proxy, mainly used by vendors to set up different Kubernetes architectures. That’s essentially an API the Kubernetes API server can use to check who is sending a specific request.Īs mentioned above, there are two more ways to provide access to a Kubernetes cluster. You can also introspect the token with an identity provider endpoint. You can refresh tokens through the command line sending the ID and refresh token to the identity provider, providing you a set of refreshed tokens. Kubectl config set -context da -admin -cluster =demo -rbac -user =da -adminĪccess tokens are usually short-lived, while the refresh tokens have a longer shelf life. ![]() Kubectl config set -credentials sa1 "-token=$" User: generate user privat key (if not exist): This is done with a special object in the Kubernetes API called CertificateSigningRequest.Īuthentication: X509 Client Cert, Kubernetes CSR Instead, it sends it to the Kubernetes cluster which will sign the certificate and return it to the administrator who can now extract the signed certificate from the Kubernetes API and send it back to the client. In this case, the system administrator or external system does not sign it. As a client, you can create certificate signature requests. Kubectl config set -context user1 -cluster demo -rbac -user user1Īlternatively, you can use client certificate authentication directly from the cluster. Kubectl config set -credentials user1 -client -key user1. User: generate user private key (if not exist): Here is a sequence of signing certificate commands: While that may be acceptable with an enterprise PKI, it likely isn’t with manual certificate signatures. The server CA private key will be exposed to an external system or administrator.
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