The Flow Strategy

Flow turns a group's strategy into a graph: ENTRY → ROUTER(s) → MEMBER(s). Every request enters at ENTRY, passes through routers, and reaches a member (a real model). Routers are the decision-making nodes.

#Edge types

route

Leaves an entry or router; the "forward" direction of the graph. Followed based on the router's decision.

status

Leaves a member; defines a jump to another member/router when an upstream HTTP error (429, 5xx…) occurs (failover).

self-loop

A member's status edge back to itself: retries the same member a set number of times (self-retry).

#default_target

If no rule matches at the end of the chain or all targets become unusable, the optional default_target is tried once. If that also fails, the last upstream error is returned to the client — a request is never turned into an internal 500.