DNS Support

Kubeshark provides protocol-level visibility into Kubernetes’ DNS traffic by capturing all UDP streams that include DNS traffic. Once captured, DNS traffic is dissected and become available as any other protocol supported by Kubeshark.

DNS Log

Use Kubeshark to view a DNS log and export into a PCAP file. To view only DNS entries, use: dns in the KFL query box. Use the export to PCAP button to export the DNS traffic to a PCAP file.

DNS Log

DNS Investigation

As with any other protocol supported by Kubeshark, you can use a KFL query in conjunction with any property in the DNS payload to trace down the root of any incident.

DNS Investigation

Service-to-DNS Connectivity Map

Use the Service Map in conjunction with a DNS KFL query dns to see all the services that are connected all the DNS providers in the cluster (e.g. kube-dns).

DNS Service Map

DNS Stress Test

Kubeshark stores the UDP stream that includes the DNS traffic. The stream can be used to replay the traffic aimed at the server destination.

When used with the load testing option, it can be used to stress test your DNS provider (e.g. kube-dns) and see where it scales or congests.

DNS Replay

To activate the stress test, put any number in the replay count and select the Replay the UDP streams concurrently. (load testing) option.