Graceful delegate shutdown
Harness Delegate is designed to shut down gracefully. The process of graceful delegate shutdown is as follows:
- The delegate receives an instruction to quit.
- A grace period begins during which the delegate:
- Stops accepting new tasks.
- Works to complete running tasks.
- The grace period ends.
- Delegates that have not quit are force-terminated.
- Incomplete tasks are discarded.
The length of the grace period is configurable.
| Delegate type | Grace period | Default interval |
|---|---|---|
| Immutable image | Yes | 10 minutes |
| Legacy image | No | 30 seconds |
The event that initiates the graceful shutdown depends on delegate type.
| Delegate environment | Trigger | |
|---|---|---|
| Kubernetes | Pod termination, eviction, or user-initiated scaling | |
| Docker | docker kill command | |
| Shell | ./stop.sh instruction |