Zero-Downtime Modernization: Norwegian Labor and Welfare Administration’s Path to Open Source Observability with OpenSearch

To align with its "open source first" strategy and cloud modernization goals, the Norwegian Labour and Welfare Administration (NAV) migrated its 400GB-per-day logging infrastructure from Elasticsearch to managed OpenSearch in partnership with Aiven. This strategic transition reduced operational complexity for over 1,000 developers while ensuring uninterrupted observability and continuous access to critical welfare services for millions of citizens.