https://rnemeth90.github.io/tags/csharp/Recent content in Csharp on GeekyRyanHugoen-usMon, 17 Aug 2026 09:00:00 +0000https://rnemeth90.github.io/projects/2023-08-17-dnspinger/Mon, 17 Aug 2026 09:00:00 +0000https://rnemeth90.github.io/projects/2023-08-17-dnspinger/<p>DNS problems in Kubernetes are some of the most frustrating issues to chase down. They&rsquo;re often intermittent, they can differ by node, by node pool, by which resolver actually answered the query, and the standard toolbox (<code>nslookup</code>/<code>dig</code> run once by hand) doesn&rsquo;t tell you much about a problem that only shows up 1% of the time or only on certain nodes. I got tired of manually reproducing DNS flakiness during incidents, so I wrote <strong>DnsPinger</strong> — a small, purpose-built .NET console application that continuously exercises DNS resolution from inside the cluster and reports what it finds.</p>