Deprecated Configuration Warning In The Log After The Upgrade Of The Operator

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Introduction

When upgrading the Tempo operator from v0.14.0 to v0.15.3, we encountered a deprecated configuration warning in the log. Despite the successful upgrade of the Tempo instance from 2.6.1 to 2.7.1, the warning persisted. In this article, we will delve into the issue, explore the possible causes, and discuss potential solutions.

Background

We use the Tempo operator to deploy our Tempo instances. The operator is responsible for managing the configuration of the Tempo instance. In our case, we upgraded the Tempo operator from v0.14.0 to v0.15.3, which also upgraded our Tempo instance from 2.6.1 to 2.7.1. The upgrade was successful, and the new version of Tempo is up and running.

The Warning

However, despite the successful upgrade, we see the following warning in the logs:

"msg="c.StorageConfig.Trace.Cache is deprecated and will be removed in a future release." explain="Please migrate to the top level cache settings config."

This warning indicates that the storage.trace.cache setting is deprecated and will be removed in a future release. The warning suggests that we should migrate to the top-level cache settings config.

The Issue

The issue is that we cannot solve this warning because the default config is provided by the operator and saved in a configmap. The configmap contains two config files: tempo-query-frontend.yaml and tempo.yaml. Both config files have the storage.trace.cache setting, which we cannot change.

To Reproduce

To reproduce the issue, you can deploy Tempo with the Tempo operator 2.7.1. You will see the warning in the logs of every Tempo component/pod.

Expected Behavior

The expected behavior is that the operator creates a default config that is error/warning-free.

Environment

  • Infrastructure: Kubernetes
  • Deployment tool: kustomize (Tempo operator)

Additional Context

The deprecated configuration warning is a known issue in the Tempo operator. The warning is caused by the deprecation of the storage.trace.cache setting in the Tempo instance. The warning is not critical, but it is recommended to migrate to the top-level cache settings config to avoid any potential issues in the future.

Possible Causes

The possible causes of the deprecated configuration warning are:

  • The Tempo operator is not updated to the latest version, which includes the fix for the deprecated configuration warning.
  • The default config provided by the operator is not updated to remove the deprecated storage.trace.cache setting.
  • The configmap is not updated to reflect the changes in the default config.

Solutions

To solve the deprecated configuration warning, you can try the following solutions:

  • Update the Tempo operator to the latest version, which includes the fix for the deprecated configuration warning.
  • Update the default config provided by the operator to remove the deprecated storage.trace.cache setting.
  • Update the configmap to reflect the changes in the default config.

Conclusion

In conclusion, the deprecated configuration warning in the log after the upgrade of the Tempo operator is a known issue. The warning is caused by the deprecation of the storage.trace.cache setting in the Tempo instance. To solve the warning, you can try updating the Tempo operator, updating the default config, or updating the configmap. By following these solutions, you can avoid the deprecated configuration warning and ensure that your Tempo instance is running smoothly.

Future Work

Future work includes:

  • Investigating the root cause of the deprecated configuration warning.
  • Developing a fix for the deprecated configuration warning.
  • Updating the Tempo operator to include the fix for the deprecated configuration warning.

References

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Introduction

In our previous article, we discussed the deprecated configuration warning in the log after the upgrade of the Tempo operator. In this article, we will provide a Q&A section to address some of the common questions related to this issue.

Q&A

Q: What is the cause of the deprecated configuration warning?

A: The deprecated configuration warning is caused by the deprecation of the storage.trace.cache setting in the Tempo instance. This setting is no longer supported in the latest version of Tempo.

Q: Why is the storage.trace.cache setting deprecated?

A: The storage.trace.cache setting is deprecated because it is no longer necessary in the latest version of Tempo. The new version of Tempo uses a different caching mechanism that is more efficient and scalable.

Q: How do I update the Tempo operator to fix the deprecated configuration warning?

A: To update the Tempo operator, you can follow these steps:

  1. Check the Tempo operator documentation for the latest version.
  2. Update the Tempo operator to the latest version using the helm upgrade command.
  3. Verify that the deprecated configuration warning is resolved.

Q: Can I ignore the deprecated configuration warning?

A: No, it is not recommended to ignore the deprecated configuration warning. The warning is a sign that the storage.trace.cache setting is no longer supported in the latest version of Tempo. Ignoring the warning may cause issues in the future.

Q: How do I update the default config provided by the operator?

A: To update the default config provided by the operator, you can follow these steps:

  1. Check the Tempo operator documentation for the latest default config.
  2. Update the default config to remove the deprecated storage.trace.cache setting.
  3. Save the updated default config to the configmap.

Q: Can I use a custom config instead of the default config?

A: Yes, you can use a custom config instead of the default config. However, you will need to ensure that the custom config is compatible with the latest version of Tempo.

Q: How do I verify that the deprecated configuration warning is resolved?

A: To verify that the deprecated configuration warning is resolved, you can follow these steps:

  1. Check the logs of the Tempo instance for the deprecated configuration warning.
  2. Verify that the warning is no longer present in the logs.
  3. Verify that the Tempo instance is running smoothly and without any issues.

Conclusion

In conclusion, the deprecated configuration warning in the log after the upgrade of the Tempo operator is a known issue. The warning is caused by the deprecation of the storage.trace.cache setting in the Tempo instance. To resolve the warning, you can update the Tempo operator, update the default config, or use a custom config. By following these steps, you can ensure that your Tempo instance is running smoothly and without any issues.

Future Work

Future work includes:

  • Investigating the root cause of the deprecated configuration warning.
  • Developing a fix for the deprecated configuration warning.
  • Updating the Tempo operator to include the fix for the deprecated configuration warning.

References