Anatomy of a GitOps Engine: Understanding Your Sync
summary
Explains how Argo CD calls the GitOps Engine to perform three duties: cluster cache of live objects, manifest diffing, and the actual apply step; the engine orders resources with a hardcoded list and treats each resource as a sequential task with a dry run then apply, supports replace/force annotations, pruning with prune last and prune confirm, multi‑phase sync hooks (pre/post/fail) with deletion policies, per‑phase sync waves, retry limits (‑1 = infinite) and a global sync timeout, auto‑sync once per commit, and self‑heal only from a last successful sync.
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chapters (11)
- 0:00GitOps and Argo CD intro
- 2:09GitOps engine explained
- 5:01Argo CD sync triggers
- 7:10Sync resource ordering
- 9:38Pruning options
- 10:20Sync hooks phases
- 17:01Sync waves
- 19:13Retry policies and timeouts
- 21:21Auto sync and self healing
- 23:06Key takeaways
- 24:53Q&A
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