Python ScriptTrigger

Python ScriptTrigger

Certified

Trigger on Python script condition

Polls by running an inline Python script (default image python: 3.13-slim) and emits when exitCondition matches. Supports edge mode to emit only on transitions and polls every 60s by default. Accepts 'exit N' or a regex (fallback substring) matched against emitted vars and failure logs.

yaml
type: io.kestra.plugin.scripts.python.ScriptTrigger

Trigger when the Python script fails with exit code 1.

yaml
id: python_script_trigger
namespace: company.team

triggers:
  - id: script_failure
    type: io.kestra.plugin.scripts.python.ScriptTrigger
    interval: PT10S
    exitCondition: "exit 1"
    edge: true
    script: |
      raise Exception("boom")

tasks:
  - id: log
    type: io.kestra.plugin.core.log.Log
    message: "Triggered with exitCode={{ trigger.exitCode }} (condition={{ trigger.condition }})"
Properties

Inline Python script

Multi-line script executed on each poll.

Defaultfalse

Specifies whether a trigger is allowed to start a new execution even if a previous run is still in progress.

Defaultpython:3.13-slim

Container image for script execution

Image used by the Script task to run the inline Python script; defaults to 'python: 3.13-slim'.

Defaulttrue

Edge trigger mode

If true (default), the trigger emits only on a transition from 'not matching' to 'matching' (anti-spam). If false, the trigger emits on every poll where the condition matches.

Condition to match

Condition evaluated after each execution. The trigger emits only when it matches. 'exit N' compares the exit code, otherwise the string is used as a regex (or substring fallback) against emitted vars (from ::{"outputs": ...}::) and failure logs.

DefaultPT1M
Formatduration

Check interval

Interval between polling evaluations.

SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

List of execution states after which a trigger should be stopped (a.k.a. disabled).

Defaulttrue

A condition that determines whether the trigger should run.

A Pebble expression evaluated at trigger time. The trigger fires only when the expression evaluates to a truthy value (true, a non-empty string, a non-zero number). Use this to gate trigger execution on dynamic runtime values such as execution labels, flow variables, or environment conditions.

Rendered condition

Rendered value of the exitCondition property for this poll.

Exit code

Exit code returned by the Python process (may be null if not available).

Formatdate-time

Timestamp of the event that fired the trigger

Script vars

Vars produced by the task (e.g. via ::{"outputs": {...}}:: convention).

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