[Feature] Add network throughput metrics

[LorenzoTettamanti]

Is your feature request related to a problem?

• Yes

  Problem Description:

The metrics API is already intercepting L3-L4 traffic using the identity service. A useful additional feature would be adding a network throughput metric

Solution:

• Intercepts bytes size from the L3-L4 existing programs

• Add a counter that measure the total bytes processed in a time interval

• Derive the throughput using the formula: Bytes processed/ time interval

  Additional info

  • Discuss with the team before submitting a solution
  • Useful files:
    • otel_metrics.rs
    • buffer_type.rs
    • kernel-space metrics tracer
    • user space metrics consumer