AlertSystem { # Alert System
n1: circle label:"Start"
n2: rectangle label:"Detect anomaly in metrics"
n3: rectangle label:"Trigger rollback alert"
n4: rectangle label:"Notify on-call engineer"
n5: circle label:"End"
n1.handle(right) -> n2.handle(left)
n2.handle(right) -> n3.handle(left)
n3.handle(bottom) -> Orchestrator.n6.handle(top) [label="Initiate rollback"]
n4.handle(right) -> n5.handle(left)
}
Orchestrator { # Deployment Orchestrator
n6: rectangle label:"Identify current version"
n7: rectangle label:"Fetch previous stable version"
n8: diamond label:"Previous version available?"
n9: rectangle label:"Prepare rollback manifest"
n10: rectangle label:"Halt manual rollback"
n6.handle(right) -> n7.handle(left)
n7.handle(right) -> n8.handle(left)
n8.handle(right) -> n9.handle(left) [label="Yes"]
n8.handle(bottom) -> n10.handle(top) [label="No"]
n9.handle(bottom) -> Kubernetes.n11.handle(top) [label="Apply"]
n10.handle(top) -> AlertSystem.n4.handle(bottom) [label="Manual needed"]
}
Kubernetes { # Kubernetes Cluster
n11: rectangle label:"Scale down new pods"
n12: rectangle label:"Deploy previous image"
n13: rectangle label:"Wait for pods ready"
n14: diamond label:"All pods healthy?"
n15: rectangle label:"Update service selector"
n16: rectangle label:"Mark rollback failed"
n11.handle(right) -> n12.handle(left)
n12.handle(right) -> n13.handle(left)
n13.handle(right) -> n14.handle(left)
n14.handle(right) -> n15.handle(left) [label="Yes"]
n14.handle(bottom) -> n16.handle(top) [label="No"]
n15.handle(bottom) -> Verification.n17.handle(top) [label="Traffic shifted"]
n16.handle(top) -> AlertSystem.n4.handle(bottom) [label="Failed"]
}
Verification { # Verification
n17: rectangle label:"Run smoke tests"
n18: diamond label:"Tests passing?"
n19: rectangle label:"Update deployment status"
n20: rectangle label:"Cleanup old resources"
n21: rectangle label:"Escalate to team lead"
n17.handle(right) -> n18.handle(left)
n18.handle(right) -> n19.handle(left) [label="Yes"]
n18.handle(bottom) -> n21.handle(top) [label="No"]
n19.handle(right) -> n20.handle(left)
n20.handle(top) -> AlertSystem.n4.handle(bottom) [label="Rollback complete"]
n21.handle(top) -> AlertSystem.n4.handle(bottom) [label="Needs attention"]
}