1. Proposed title of this feature request

Remote read support in cluster monitoring operator

2. What is the nature and description of the request?

Our primary need is supporting additionalScrapeConfigs supported in the upstream operator[1] for specifying targets that cannot be managed using the provided CRDs (Service/PodMonitor) such as kubernetes_sd_config or http_sd_config [2].

[1] https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/additional-scrape-config.md
[2] https://prometheus.io/docs/prometheus/latest/configuration/configuration/#http_sd_config

Remote_write was enabled in Openshift 4.9 and customer is asking about the possibility of enabling remote_read as well

https://docs.openshift.com/container-platform/4.9/monitoring/configuring-the-monitoring-stack.html?extIdCarryOver=true&sc_cid=701600000006NHXAA2#configuring_remote_write_storage_configuring-the-monitoring-stack

3. Why does the customer need this? (List the business requirements here)

Features like remote_read or federation (using additionalScrapeConfigs) would support aggregating data from other instances without conflicting with the managed instance.

[3] https://prometheus.io/docs/prometheus/latest/federation/#configuring-federation

4. List any affected packages or components.

Cluster-monitoring-operator