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Container orchestration deployment order

In containerized environments, particularly when deploying complex systems like Spinnaker, components must be initialized in a specific sequence to satisfy dependencies.^[400-devops__06-Kubernetes__k8s-paas__08.spinaker部署与应用.md] A failure to adhere to this order can lead to startup crashes because services will attempt to connect to dependencies that are not yet available.

Core dependency chain

The deployment order is dictated by the specific roles of each component within the architecture^[400-devops__06-Kubernetes__k8s-paas__08.spinaker部署与应用.md]:

  1. Storage and Caching: Minio (object storage) and Redis (caching) form the foundational data layer.
  2. Infrastructure: Clouddriver manages cloud resources and must be aware of the storage layer.
  3. Persistence: Front50 manages persistent data and relies on the storage layer (Minio).
  4. Orchestration: Orca manages execution pipelines and relies on services like Front50.
  5. Communication: Echo handles messaging events.
  6. Integration: Igor connects to external CI systems (like Jenkins).
  7. API Gateway: Gate exposes the API to the frontend.
  8. User Interface: Deck serves the static UI content.
  9. Proxy: Nginx acts as the Ingress proxy, routing traffic to the UI and API.

For a Spinnaker deployment (specifically the Armory distribution), the recommended startup sequence is^[400-devops__06-Kubernetes__k8s-paas__08.spinaker部署与应用.md]:

Minio -> Redis -> Clouddriver -> Front50 -> Orca -> Echo -> Igor -> Gate -> Deck -> Nginx

This order ensures that: * Stateful services are available before stateless compute services start. * Core microservices are operational before the API gateway attempts to route traffic to them. * The frontend is only started after the backend API is ready.

Sources

  • 400-devops__06-Kubernetes__k8s-paas__08.spinaker部署与应用.md
  • [[Service discovery]]
  • [[Health checks]]
  • [[Dependency management]]