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Docs: canary Argo Rollouts example uses postPromotionAnalysis, which only exists for BlueGreen #3300

Description

@DHUKK

Page

Deploy Federated GraphQL with Confidence, section "Advanced: Canary Deployments" > "Implementing with Argo Rollouts"

Problem

The example Rollout uses strategy.canary and publishes the schema from postPromotionAnalysis:

strategy:
  canary:
    steps:
      - setWeight: 10
      # ...
      - setWeight: 100
    postPromotionAnalysis:
      templates:
        - templateName: publish-subgraph-schema

Argo Rollouts only supports postPromotionAnalysis for the BlueGreen strategy (docs). The canary strategy has no such field. There is an open feature request for it in argoproj/argo-rollouts#1978. As a result the example can't be used as documented, and the "Automated Rollback" section that follows describes behaviour a canary Rollout won't have.

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