Telepresence telepresence: error 18

Service account token expired.

Understanding Telepresence

Telepresence is an open-source tool that allows developers to debug and develop services locally while connected to a remote Kubernetes cluster. It provides a seamless way to test code changes in real-time without the need to deploy them to the cluster, thus speeding up the development process.

Identifying the Symptom

When using Telepresence, you might encounter the error message: telepresence: error 18. This error indicates that there is an issue with the authentication process, specifically related to the service account token.

Explaining the Issue

What is Error 18?

Error 18 in Telepresence typically signifies that the service account token used for authentication with the Kubernetes cluster has expired. This token is crucial for establishing a secure connection between your local development environment and the remote cluster.

Why Does This Happen?

Service account tokens have a limited lifespan for security reasons. Once expired, they need to be renewed to maintain access to the Kubernetes cluster. If not renewed, Telepresence cannot authenticate, resulting in error 18.

Steps to Fix the Issue

Renewing the Service Account Token

To resolve this issue, you need to renew the service account token. Follow these steps:

  1. Identify the service account used by Telepresence. This is usually specified in your Telepresence configuration or Kubernetes deployment files.
  2. Generate a new token for the service account. You can do this by executing the following command in your terminal:
    kubectl create token --namespace=
  1. Update your Telepresence configuration with the new token. This might involve editing a configuration file or setting an environment variable, depending on your setup.
  2. Restart Telepresence to apply the changes:
    telepresence quit
    telepresence connect

Verifying the Fix

After renewing the token and restarting Telepresence, verify that the issue is resolved by checking the connection status. You should no longer see error 18, and Telepresence should connect to the Kubernetes cluster successfully.

Additional Resources

For more information on managing service accounts and tokens, refer to the official Kubernetes documentation on Service Accounts. Additionally, the Telepresence Documentation provides further insights into configuring and troubleshooting Telepresence.

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