Argo CD: Previewing Pull Request Changes in SECONDS!
summary
Argo CD diff preview renders PR and main branches with a real Argo CD renderer and outputs deterministic diffs instead of guessing from templates. It runs in ephemeral cluster mode or by connecting to a pre-configured Argo CD instance, uses self‑hosted runners and optional watch patterns to limit rendered apps, and scales from minute‑long runs to sub‑10‑second previews. Egmont reports ~1,000 apps in ~5 seconds; Tango reduces 2,000s of apps pipelines from ~30 minutes to ~30 seconds (and single changes to ~8 seconds).
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chapters (9)
- 0:00The problem with GitOps
- 1:10Designing a reliable preview
- 3:47Introducing Argo CD diff preview
- 6:16Optimizing ephemeral setups
- 8:30Using preconfigured clusters
- 10:12Egmont's implementation
- 11:50Tango's architectural approach
- 15:05Advanced performance techniques
- 19:02Summary and best practices
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