[Feature] Support multiple clients requesting Open Metrics #81
Description
Context
Customer can configure their EKS environment to scrape the /metrics endpoint from different endpoints. This NFM agent feature was based on the assumption that there is only one endpoint (common scenario) and on some OS limitations (source of information return historical values, that we need to transform in deltas between calls).
Request
Update the agent to support multi-client scenarios.
Proposal
There are 2 ways to implement this.
- Agent calculates an snapshot (even if there is no request). We need to define an aggregation period for this calculation.
- Keep track of results per client (this will increase the memory consumption and CPU usage, but worth a try).
- Change the returned metrics for absolute values instead of delta (this option was discarded during initial implementation because it is easier to find metrics anomalies using deltas). This could break backwards compatibility if we don't support both type of metrics.
Will check this, but looks like option 1 is the reasonable way to go.
See: #71