Temporal
hosomaki.temporal
Durable execution engine running long-lived workflows as replayable code, persisting every step so processes survive worker restarts, retries and version changes without losing their place.
A Docker Compose file for Temporal alone, generated from the catalog and checked by the safety inspector. Sign in and use Kitchen Credits to activate it.
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Temporal separates workflow code, which must be deterministic, from activities, which perform the side effects, and records every activity result in an event history. When a worker dies that history is replayed against fresh workers and execution resumes where it stopped, which is what lets a workflow wait days for an external event without holding a process open. Retries, timeouts, timers and signals are handled by the service rather than written into application code. The server needs a persistence backend and at least one worker registered for the relevant task queue before anything executes.
You know it worked when
- The server reports its internal services healthy and the default namespace registered.
- The web interface lists that namespace.
- A worker connects and appears against its task queue.
- A workflow started from a client completes and its event history is visible step by step.
- A deliberately failing activity is retried under its policy rather than terminating the workflow.
Known sharp edges
- The auto-setup image provisions its own schema at start and is intended for development; a production cluster needs an externally managed persistence store.
- Workflow code must be deterministic, so a stray clock read, random value or unordered map iteration diverges on replay and stalls the execution.
- Changing a workflow definition while executions are in flight breaks replay unless the change is guarded by the versioning API.
- The server alone does nothing: workflows stay queued indefinitely until a worker registered for that task queue connects.