Export opentelemetry metrics to open search - opensearch

Question

I am trying to export opentelemetry metrics to open search.
My configurations are as mentioned below
metrics-pipeline:
source:
otel_metrics_source::
processor:
- otel_metrics_raw_processor:
sink:
- opensearch:
hosts: ["https://<domain-name>:443"]
insecure: true
username: "username"
password: "password
I was going through one of the data prepper issue and came to know that metrics support is included recently.
https://github.com/opensearch-project/data-prepper/issues/242
I am not able to find proper documentation on this.
In the data prepper pod, getting the below exception
com.amazon.dataprepper.model.plugin.NoPluginFoundException: Unable to find a plugin named 'otel_metrics_source:'. Please ensure that plugin is annotated with appropriate values.
at com.amazon.dataprepper.plugin.DefaultPluginFactory.lambda$getPluginClass$2(DefaultPluginFactory.java:111) ~[data-prepper.jar:1.5.1]
at java.util.Optional.orElseThrow(Optional.java:401) ~[?:?]
at com.amazon.dataprepper.plugin.DefaultPluginFactory.getPluginClass(DefaultPluginFactory.java:111) ~[data-prepper.jar:1.5.1]
at com.amazon.dataprepper.plugin.DefaultPluginFactory.loadPlugin(DefaultPluginFactory.java:62) ~[data-prepper.jar:1.5.1]
Appreciate any inputs on this.

Answer 1

Currently, there is no section on the opentelemetry metrics support in the general documentation of DataPrepper. You can find documentation within the respective plugin directories:
otel-metrics-source
otel-metrics-raw-processor
There is also a blog post on the OpenTelemetry metrics ingestion with DataPrepper in the OpenSearch blogs. It contains a configuration example.

Answer 2

Just remove the extra colon at the end of otel_metrics_source , set ssl flag to false and add the index in opensearch section.
Thank you #Karsten Schnitter for your help.
Updated configurations
metrics-pipeline:
source:
otel_metrics_source:
ssl: false
processor:
- otel_metrics_raw_processor:
sink:
- opensearch:
hosts: ["https://<domain-name>:443"]
insecure: true
username: "username"
password: "password
index: metrics-otel-v1-%{yyyy.MM.dd}