Added support for OTEL Collector

[roopeshsn]

No additional instrumentation changes are required for the OTEL collector. It receives (supports prometheus metrics format) metrics from Prometheus and exports them to the desired remote backend. I also tested OTEL collector with Grafana cloud.

#105

[roopeshsn]

If the end user makes changes to the endpoint field in the otel-collector-config.yml file, then the OTEL collector will export metrics to that backend. So in parallel, one can export metrics to Prometheus backend and visualize them in Grafana in localhost and remote backend (in my case Grafana cloud). I would like to ensure whether this is a desired behavior.

[pmoroney]

LGTM, Thanks!

[sanfern]

Add other architure support (i.e. arm).
We are getting this error 024-05-06T12:04:52.044+0530 error exporterhelper/queue_sender.go:101 Exporting failed. Dropping data. {"kind": "exporter", "data_type": "metrics", "name": "prometheusremotewrite", "error": "Permanent error: Permanent error: context deadline exceeded", "dropped_items": 39} go.opentelemetry.io/collector/exporter/exporterhelper.newQueueSender.func1

[roopeshsn]

Add other architure support (i.e. arm). We are getting this error 024-05-06T12:04:52.044+0530 error exporterhelper/queue_sender.go:101 Exporting failed. Dropping data. {"kind": "exporter", "data_type": "metrics", "name": "prometheusremotewrite", "error": "Permanent error: Permanent error: context deadline exceeded", "dropped_items": 39} go.opentelemetry.io/collector/exporter/exporterhelper.newQueueSender.func1

So the OTEL collector works fine in x64 architecture right?

[roopeshsn]

Add other architure support (i.e. arm). We are getting this error 024-05-06T12:04:52.044+0530 error exporterhelper/queue_sender.go:101 Exporting failed. Dropping data. {"kind": "exporter", "data_type": "metrics", "name": "prometheusremotewrite", "error": "Permanent error: Permanent error: context deadline exceeded", "dropped_items": 39} go.opentelemetry.io/collector/exporter/exporterhelper.newQueueSender.func1

This issue is not yet fixed by OTEL. But there is a workaround: open-telemetry/opentelemetry-collector-contrib#31910 (comment)

[sanfern]

Exporting to Otel_collector should not default, make it conditional please

[sanfern]

Please update the setup steps in the README file.

[roopeshsn]

Hi @sanfern! Made changes as per review comments. Let me know if further changes are required.

[sanfern]

LGTM, minor changes needed, by removing else block.

[sanfern]

Add newline

[roopeshsn]

Need to remove newline?

[sanfern]

LGTM