Part 7
3 chapters
Delivery and operations
Environment promotion, GitOps with Argo CD, and observability through the library chart.
Chapter 24
Environment promotion
Run one umbrella chart in dev, stage and prod with layered values files, per-environment namespaces and version pins, and promote by changing a version line in Helmfile.
Chapter 25
GitOps with Argo CD
Install Argo CD from its Helm chart and let it sync the umbrella chart from an OCI registry. Covers valueFiles and valuesObject, how helm hooks map to sync hooks, why lookup returns nothing, and sync waves.
Chapter 26
Observability with the LGTM stack
Turn on OpenTelemetry through a library template, ship a Grafana dashboard as a labelled ConfigMap, and follow one trace from shipping-service across Kafka to notification-service in Tempo.