K8s annotation discovery blogpost

[ChrsMark]

This PR adds a blog post about the new functionality of the Opentelemetry Collector which was introduced with open-telemetry/opentelemetry-collector-contrib#34427.

With this new feature now the Collector provides support for dynamic workload discovery based on Kubernetes Pods's annotations.

Preview: https://deploy-preview-5967--opentelemetry.netlify.app/blog/2025/otel-collector-k8s-discovery/

/cc @dmitryax

[ChrsMark]

FYI @open-telemetry/docs-maintainers sth is odd with the 2025 index page and I cannot find the preview page that is built. I assume it's because there is no prior blog post for 2025 and something is missing there but not sure what.

[svrnm]

A first pass! This is a really great feature I was not aware coming, so great to have a blog post.

Note: we should also think about turning some of that into documentation immediatly otherwise this gets dated and people will refer to it as docs, would you be able to provide that as well? Could be a very basic page with an example to begin with

[ChrsMark]

A first pass! This is a really great feature I was not aware coming, so great to have a blog post.

Note: we should also think about turning some of that into documentation immediatly otherwise this gets dated and people will refer to it as docs, would you be able to provide that as well? Could be a very basic page with an example to begin with

Thank's for reviewing @svrnm! About turning this into documentation: I linked the last paragraph to the perspective documentation of that feature in the Collector: https://github.com/open-telemetry/opentelemetry.io/pull/5967/files#diff-4fa372b70b4ce1ad702b596ad6f06decb547f6de4dd4ca979ffeee2bac298f72R182. Would we need more than this?

[svrnm]

A first pass! This is a really great feature I was not aware coming, so great to have a blog post.
Note: we should also think about turning some of that into documentation immediatly otherwise this gets dated and people will refer to it as docs, would you be able to provide that as well? Could be a very basic page with an example to begin with

Thank's for reviewing @svrnm! About turning this into documentation: I linked the last paragraph to the perspective documentation of that feature in the Collector: #5967 (files). Would we need more than this?

I mean adding a section/page somewhere in https://opentelemetry.io/docs/collector/

[ChrsMark]

I mean adding a section/page somewhere in https://opentelemetry.io/docs/collector/

My only concern would be that we would need to maintain that source in addition to receiver's README, right?
If we find value in doing this I'm fine filing an issue and assigning it to me.

[andrzej-stencel]

Looks great to me 🚀 Just a couple nits/typos. with the caveats that I'm not a native English speaker, so my suggestions might be incorrect. Feel free to discard them.

[chalin]

Some initial comments.

[chalin]

Preview is now up: https://deploy-preview-5967--opentelemetry.netlify.app/blog/2025/otel-collector-k8s-discovery/

[chalin]

/fix:all

[opentelemetrybot]

You triggered fix:all action run at https://github.com/open-telemetry/opentelemetry.io/actions/runs/12919783314

[opentelemetrybot]

fix:all was successful.

IMPORTANT: (RE-)RUN /fix:all to ensure that there are no remaining check issues.

[tiffany76]

Just a few tiny polishes, otherwise LGTM! Thanks!

[chalin]

LGTM (mainly for overall structure) once @tiffany76's suggestions are addressed.

[svrnm]

🎉 https://opentelemetry.io/blog/2025/otel-collector-k8s-discovery/