Skip to content
This repository has been archived by the owner. It is now read-only.
master
Switch branches/tags
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Mutating trace admission controller

Mutating admission controller that injects base64 encoded OpenCensus span context into the trace.kubernetes.io/context object annotation.

Purpose

The trace context injected with this mutating controller can be used by Kubernetes components to export traces associated with object lifecycles. For more information on this effort, please refer to the official KEP.

Quick start

The structure of this mutating admission controller was informed by the mutating admission webhook found here. The basic idea is as follows:

  1. Create an HTTPS-enabled server that takes Pod json from the API server, inserts encoded span context as an annotation, and returns it
  2. Run a deployment with this webhook server, and expose it as a service
  3. Create a MutatingWebhookConfiguration which instructs the API server to send Pod objects to the aforementioned service upon creation

The included Makefile makes these steps straightforward and the available commands are as follows:

  • make docker: build local Docker image
  • make cluster-up: apply certificate configuration and deployment configuration to cluster for the mutating webhook
  • make cluster-down: delete resources associated with the mutating webhook from the active cluster

There are example patches which can be used with kustomize to configure the deployment of this webhook into your cluster under deploy/base/overlays/example. This example custom configuration can be applied with:

kustomize build deploy/overlays/example | kubectl apply -f -

This can be used, for example, to set different sampling policies between production and staging clusters.

Community, discussion, contribution, and support

Learn how to engage with the Kubernetes community on the community page.

You can reach the maintainers of this project at:

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.

About

[EOL] a mutating admission controller which enables experimental tracing of kubernetes object lifecycle

Topics

Resources

License

Releases

No releases published

Packages

No packages published