Maintaining Data Stream Uptime with DNS-Failover for Cribl Cloud
TECHNICAL WRITING · INSTRUCTIONAL GUIDE
December 11, 2023 | Read the full article on Medium ↗
A practical guide to building and validating a DNS- and TLS-based failover path for critical observability data.
Critical event streams often cross public networks and cloud-provider infrastructure, creating failure points outside the control of the systems sending and receiving the data. This article presents a practical approach to maintaining an alternate ingestion path between a managed Cribl Cloud worker group and a self-hosted hybrid worker group.
The guide covers the complete implementation path: creating a stable ingestion hostname, configuring DNS records, issuing a TLS certificate that supports both environments, installing the certificate on Cribl Stream inputs, and validating primary and failover connectivity before an outage occurs.
Why it matters
DNS failover is not instantaneous. Detection, DNS changes, cached records, and TTL expiration may all introduce delay during a cutover. This guide treats failover as an operational workflow rather than a single configuration setting. It connects network design, certificate management, observability infrastructure, testing, and incident runbooks into one repeatable process.
What you’ll learn
Design a stable ingestion hostname for primary and failover environments.
Understand how CNAME records and TTL values affect cutover.
Create and validate a TLS certificate for both worker groups.
Install certificates on Cribl Stream inputs.
Test & verify operation
What this work demonstrates
This article demonstrates how I turn a cross-disciplinary reliability problem into an actionable technical guide. It combines solution architecture, DNS and TLS configuration, cloud and self-hosted infrastructure, visual instruction, command-line testing, and operational handoff.