[demo] Use k8sattributesprocessor instead of env vars (open-telemetry…

…#817)

* [demo] Use k8sattributesprocessor instead of env vars

Signed-off-by: Goutham <gouthamve@gmail.com>

* Add 0.24 to upgrading.md

Signed-off-by: Goutham <gouthamve@gmail.com>

* Update charts/opentelemetry-demo/UPGRADING.md

---------

Signed-off-by: Goutham <gouthamve@gmail.com>
Co-authored-by: Tyler Helmuth <12352919+TylerHelmuth@users.noreply.github.com>

charts/opentelemetry-demo/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 type: application
 name: opentelemetry-demo
-version: 0.23.0
+version: 0.24.0
 description: opentelemetry demo helm chart
 home: https://opentelemetry.io/
 sources:

charts/opentelemetry-demo/UPGRADING.md

@@ -1,5 +1,12 @@
 # Upgrade guidelines
 
+## To 0.24
+
+This release uses the [kubernetes attributes processor](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/k8sattributesprocessor) 
+to add kubernetes metadata as resource attributes. If you override the processors array in your config, you will 
+need to add the k8s attributes processor manually to restore `service.instance.id`
+resource attribute.
+
 ## To 0.23
 
 The Prometheus sub-chart dependency made updates to pod labels. You may need to