DNS v2

Extending pktvisor DNS handler metrics

The objective of the DNSv2 effort is to provide a number of significant enhancements to the DNS metrics currently provided by the pktvisor DNS handler, without the constraint of requiring reverse compatibility. That said, the changes should be made to be compatible as much as possible but important or significant enhancements should not be precluded because of this.

The following enhancements should be considered candidates for DNSv2:

• Support for DNS transactions, including
  • explicit inbound versus outbound transaction metrics
• Support for OpenMetrics style histograms
• Support for OpenMetrics exponential histograms