Shell CommandsTrigger

Shell CommandsTrigger

Certified

Trigger a flow when Shell commands match a condition

Polls and triggers a flow by running system commands in a shell container.

yaml
type: io.kestra.plugin.scripts.shell.CommandsTrigger

Trigger when commands fail with an implicit error (exit 1).

yaml
id: commands_trigger
namespace: company.team

triggers:
  - id: commands_failure
    type: io.kestra.plugin.scripts.shell.CommandsTrigger
    interval: PT10S
    exitCondition: "exit 1"
    edge: true
    containerImage: ubuntu
    commands:
      - cat /path/that/does/not/exist

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

Shell commands to execute

Commands executed on each poll (same semantics as the Shell Commands task).

Condition to match

Condition evaluated after each commands execution. The trigger emits an event only when this condition matches.

Supported forms:

  • 'exit N' (example: 'exit 1'): matches when the process exit code equals N.
  • Any other string: treated as a regex (or substring if regex is invalid) matched against:
    • the task 'vars' (when commands emit ::{"outputs": ...}::),
    • and error logs when the task fails (TaskException).
Defaultfalse

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

List of conditions in order to limit the flow trigger.

Definitions

Compares a rendered date (defaults to {{ trigger.date }}) against optional after and before bounds expressed as ISO-8601 datetimes with zone.

You must provide at least one bound; if both are set the date must fall strictly between them. Missing both bounds triggers an evaluation error.

Example

Trigger condition to execute the flow only after the specific date.

yaml
id: schedule_condition_datetimebetween
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute once every 5 minutes after the date 2025-12-31T23:59:59Z"

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "*/5 * * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.DateTimeBetween
        date: "{{ trigger.date }}"
        after: "2025-12-31T23:59:59Z"

Trigger condition to execute the flow between two specific dates.

yaml
id: schedule_condition_datetimebetween
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will be executed once every 5 minutes between the before and after dates"

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "*/5 * * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.DateTimeBetween
        date: "{{ trigger.date }}"
        after: "2025-01-01T00:00:00Z"
        before: "2025-12-31T23:59:59Z"
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.DateTimeBetweenio.kestra.core.models.conditions.types.DateTimeBetweenConditionio.kestra.plugin.core.condition.DateTimeBetweenCondition
afterstring

The date to test must be after this one.

Must be a valid ISO 8601 datetime with the zone identifier (use 'Z' for the default zone identifier).

beforestring

The date to test must be before this one.

Must be a valid ISO 8601 datetime with the zone identifier (use 'Z' for the default zone identifier).

datestring
Default{{ trigger.date }}

The date to test.

Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.

Renders a date (defaults to the trigger timestamp) and checks its day-of-week against the provided dayOfWeek.

Accepts ISO-8601 date/time strings; the comparison uses the rendered timezone.

Example

Trigger condition to execute the flow only on a specific day of the week.

yaml
id: schedule_condition_dayweek
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute only on Mondays at 11:00 am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.DayWeek
        dayOfWeek: "MONDAY"
dayOfWeek*Requiredstring
Possible Values
MONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAYSUNDAY

The day of week.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.DayWeekio.kestra.core.models.conditions.types.DayWeekConditionio.kestra.plugin.core.condition.DayWeekCondition
datestring
Default{{ trigger.date }}

The date to test.

Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.

Renders a date (defaults to the trigger timestamp) and checks whether it matches the requested weekday and position in the month (FIRST, SECOND, THIRD, FOURTH, or LAST).

Useful for patterns like “first Monday” or “last Friday”. Dates must be valid ISO-8601 strings.

Example

Trigger condition to execute the flow only on the first Monday of the month.

yaml
id: schedule_condition_dayweekinmonth
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute only on the first Monday of the month at 11:00 am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.DayWeekInMonth
        dayOfWeek: "MONDAY"
        dayInMonth: FIRST
dayInMonth*Requiredstring
Possible Values
FIRSTLASTSECONDTHIRDFOURTH

Are you looking for the first or the last day in the month?

dayOfWeek*Requiredstring
Possible Values
MONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAYSUNDAY

The day of week.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.DayWeekInMonthio.kestra.plugin.core.condition.DayWeekInMonthConditionio.kestra.core.models.conditions.types.DayWeekInMonthCondition
datestring
Default{{ trigger.date }}

The date to test.

Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.

Passes only when the triggering execution belongs to the given Namespace and Flow ID.

Pair with the Flow trigger to react to a single upstream flow; for broader namespace matching use ExecutionNamespace.

Example

Trigger condition to execute the flow based on execution of another flow.

yaml
id: flow_condition_executionflow
namespace: company.team

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute when flow `flow_a` of namespace `company.team` enters RUNNING state."

triggers:
  - id: flow_trigger
    type: io.kestra.plugin.core.trigger.Flow
    conditions:
      - type: io.kestra.plugin.core.condition.ExecutionFlow
        flowId: flow_a
        namespace: company.team
    states:
      - RUNNING
flowId*Requiredstring

The Flow ID

namespace*Requiredstring

The Flow Namespace

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.ExecutionFlowio.kestra.plugin.core.condition.ExecutionFlowConditionio.kestra.core.models.conditions.types.ExecutionFlowCondition

Evaluates true only if the execution carries all provided labels. Labels can be declared as a map or list; system-reserved labels are rejected.

Useful for filtering Flow triggers to specific environments, owners, or any custom tagging strategy.

Example

Trigger condition to execute the flow based on execution of another flow(s) with certain execution labels.

yaml
id: flow_condition_executionlabels
namespace: company.team

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute when flow with specified labels enters FAILED state."

triggers:
  - id: flow_trigger
    type: io.kestra.plugin.core.trigger.Flow
    conditions:
      - type: io.kestra.plugin.core.condition.ExecutionLabels
        labels:
          owner: john.doe
          env: prod
    states:
      - FAILED
labels*Requiredarrayobject

List of labels to match in the execution.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.ExecutionLabelsio.kestra.core.models.conditions.types.ExecutionLabelsConditionio.kestra.plugin.core.condition.ExecutionLabelsCondition

Compares the triggering execution’s namespace against a target string using EQUALS, PREFIX, or SUFFIX. The prefix boolean is a shorthand for comparison: PREFIX.

If no comparison is set, it defaults to strict equality unless prefix is true.

Example

Trigger condition to execute the flow based on execution of another flow(s) belonging to certain namespace.

yaml
id: flow_condition_executionnamespace
namespace: company.team

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute when any flow within `company.engineering` namespace enters RUNNING state."

triggers:
  - id: flow_trigger
    type: io.kestra.plugin.core.trigger.Flow
    conditions:
      - type: io.kestra.plugin.core.condition.ExecutionNamespace
        namespace: company.engineering
        comparison: PREFIX
    states:
      - RUNNING
namespace*Requiredstring

String against which to match the execution namespace depending on the provided comparison.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.ExecutionNamespaceio.kestra.core.models.conditions.types.ExecutionNamespaceConditionio.kestra.plugin.core.condition.ExecutionNamespaceCondition
comparisonstring
Possible Values
EQUALSPREFIXSUFFIX

Comparison to use when checking if namespace matches. If not provided, it will use EQUALS by default.

prefixbooleanstring
Defaultfalse

Whether to look at the flow namespace by prefix. Shortcut for comparison: PREFIX.

Only used when comparison is not set

Renders the provided boolean expression against the upstream execution outputs exposed under trigger.outputs.

If the execution exposes no outputs the condition is false and the expression is skipped. A rendered result of blank, space-only, or literal false is treated as false.

Example

The upstream flow_a must explicitly define its outputs to be used in the ExecutionOutputs condition.

id: flow_a
namespace: company.team

inputs: 
  - id: user_value
    type: STRING
    defaults: hello

tasks: 
  - id: hello
    type: io.kestra.plugin.core.debug.Return
    format: "{{ inputs.user_value }}"

outputs: 
  - id: flow_a_output
    type: STRING
    value: "{{ outputs.hello.value }}"

The flow_condition_executionoutputs will run whenever flow_a finishes successfully and returns an output matching the value 'hello':

yaml
id: flow_condition_executionoutputs
namespace: company.team

tasks:
  - id: upstream_outputs
    type: io.kestra.plugin.core.log.Log
    message: hello from a downstream flow

triggers:
  - id: condition_on_flow_execution_outputs
    type: io.kestra.plugin.core.trigger.Flow
    states:
      - SUCCESS
    conditions:
      - type: io.kestra.plugin.core.condition.ExecutionOutputs
        expression: "{{ trigger.outputs.flow_a_output == 'hello' }}"
expression*Requiredbooleanstring
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.ExecutionOutputsio.kestra.core.models.conditions.types.ExecutionOutputsConditionio.kestra.plugin.core.condition.ExecutionOutputsCondition

Passes when the triggering execution’s current state is included in in and not present in notIn.

If a list is empty it is ignored, so provide at least one of them to avoid unintentionally matching everything.

Example

Trigger condition to execute the flow based on execution status of another flow(s).

yaml
id: flow_condition_executionstatus
namespace: company.team

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute when any flow enters FAILED or KILLED state."

triggers:
  - id: flow_trigger
    type: io.kestra.plugin.core.trigger.Flow
    conditions:
      - type: io.kestra.plugin.core.condition.ExecutionStatus
        in:
          - FAILED
          - KILLED
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.ExecutionStatusio.kestra.core.models.conditions.types.ExecutionStatusConditionio.kestra.plugin.core.condition.ExecutionStatusCondition
inarray
SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

List of states that are authorized.

notInarray
SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

List of states that aren't authorized.

Renders a templated expression and treats the result as truthy/falsey to decide whether the condition passes.

Blank strings or the literal false (case-sensitive) evaluate to false; everything else is true. Expressions can reference any flow variables available at evaluation time, so make sure they resolve without errors.

Example

Trigger condition to execute the flow when the expression evaluates to true.

yaml
id: myflow
namespace: company.team

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: Average value has gone below 10

triggers:
  - id: expression_trigger
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "*/1 * * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.Expression
        expression: "{{ kv('average_value') < 10 }}"
expression*Requiredstring
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.Expressionio.kestra.plugin.core.condition.ExpressionConditionio.kestra.core.models.conditions.types.VariableCondition

Passes if any task run has more than one attempt and its state satisfies in / notIn filters.

Provide in states to avoid matching nothing (an empty in list fails all attempts). Use with Flow triggers to react when retries occur.

Example

Trigger condition when any flow task on retry enters the state specified in the in states under the HasRetryAttempt condition.

yaml
id: flow_condition_hasretryattempt
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute when any flow task on retry enters a specific state(s)."

triggers:
  - id: flow_condition
    type: io.kestra.plugin.core.trigger.Flow
    conditions:
      - type: io.kestra.plugin.core.condition.HasRetryAttempt
        in:
          - FAILED
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.HasRetryAttemptio.kestra.plugin.core.condition.HasRetryAttemptConditionio.kestra.core.models.conditions.types.HasRetryAttemptCondition
inarray
SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

List of states that are authorized.

notInarray
SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

List of states that aren't authorized.

Fails the evaluation if any nested condition is true; otherwise passes.

Combine with other schedule conditions to express “not these dates/states” patterns.

Example

Trigger condition to execute the flow when the condition is not satisfied.

yaml
id: schedule_condition_not
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute on all days except Sunday at 11am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.Not
        conditions:
          - type: io.kestra.plugin.core.condition.DayWeek
            dayOfWeek: "SUNDAY"
conditions*Required
Min items1

The list of conditions to exclude.

If any condition is true, it will prevent the event's execution.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.Notio.kestra.core.models.conditions.types.NotConditionio.kestra.plugin.core.condition.NotCondition

Evaluates nested conditions and succeeds if at least one passes.

Useful for schedule scenarios like “weekends or holidays” without duplicating triggers.

Example

Trigger condition to execute the flow when any of the conditions are satisfied.

yaml
id: schedule_condition_or
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute on Sundays and Mondays at 11am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.Or
        conditions:
          - type: io.kestra.plugin.core.condition.DayWeek
            dayOfWeek: "MONDAY"
          - type: io.kestra.plugin.core.condition.DayWeek
            dayOfWeek: "SUNDAY"
conditions*Required
Min items1

The list of conditions to validate.

If any condition is true, it will allow the event's execution.

type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.Orio.kestra.core.models.conditions.types.OrConditionio.kestra.plugin.core.condition.OrCondition

Uses the Jollyday calendar to check whether a rendered date (defaults to {{ trigger.date }}) is a public holiday for the given country/sub-division.

If country is omitted, the default locale is used. Provide ISO 3166-1 (country) and optionally 3166-2 (region) codes.

Example

Trigger condition to execute the flow only on public holidays.

yaml
id: schedule_condition_public-holiday
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute only on the public holidays of France at 11:00 am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.PublicHoliday
        country: FR

Trigger condition to execute the flow only on work days in France.

yaml
id: schedule-condition-work-days
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute only on the work days of France at 11:00 am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.Not
        conditions:
          - type: io.kestra.plugin.core.condition.PublicHoliday
            country: FR
          - type: io.kestra.plugin.core.condition.Weekend
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.PublicHolidayio.kestra.plugin.core.condition.PublicHolidayConditionio.kestra.core.models.conditions.types.PublicHolidayCondition
countrystring

ISO 3166-1 alpha-2 country code. If not set, it uses the country code from the default locale.

It uses the Jollyday library for public holiday calendar that supports more than 70 countries.

datestring
Default{{ trigger.date}}

The date to test.

Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.

subDivisionstring

ISO 3166-2 country subdivision (e.g., provinces and states) code.

It uses the Jollyday library for public holiday calendar that supports more than 70 countries.

Compares the rendered date/time (defaults to the trigger timestamp) against optional after and before offsets (ISO-8601 times).

Supports ranges that cross midnight (e.g., 22: 00→02: 00). At least one bound is required; missing both raises an evaluation error.

Example

Trigger condition to execute the flow between two specific times.

yaml
id: schedule_condition_timebetween
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute every 5 minutes between 4pm and 8pm."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "*/5 * * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.TimeBetween
        after: "16:00:00+02:00"
        before: "20:00:00+02:00"
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.TimeBetweenio.kestra.plugin.core.condition.TimeBetweenConditionio.kestra.core.models.conditions.types.TimeBetweenCondition
afterstring

The time to test must be after this one.

Must be a valid ISO 8601 time with offset.

beforestring

The time to test must be before this one.

Must be a valid ISO 8601 time with offset.

datestring
Default{{ trigger.date }}

The time to test.

Can be any variable or any valid ISO 8601 time. By default, it will use the trigger date.

Renders a date (defaults to the trigger timestamp) and passes only if it falls on Saturday or Sunday.

Accepts ISO-8601 date/time strings; uses the rendered timezone to determine the day.

Example

Trigger the flow only on weekend, i.e. on Saturdays and Sundays.

yaml
id: schedule_condition_weekend
namespace: company.team

tasks:
  - id: log_message
    type: io.kestra.plugin.core.log.Log
    message: "This flow will execute only on weekends at 11:00 am."

triggers:
  - id: schedule
    type: io.kestra.plugin.core.trigger.Schedule
    cron: "0 11 * * *"
    conditions:
      - type: io.kestra.plugin.core.condition.Weekend
type*Requiredobject
Possible Values
io.kestra.plugin.core.condition.Weekendio.kestra.plugin.core.condition.WeekendConditionio.kestra.core.models.conditions.types.WeekendCondition
datestring
Default{{ trigger.date }}

The date to test.

Can be any variable or any valid ISO 8601 datetime. By default, it will use the trigger date.

Defaultubuntu

Docker image used to execute the commands

Container image used by the underlying Commands task to run shell commands. Defaults to 'ubuntu'.

Defaulttrue

Edge trigger mode

If true, 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.

DefaultPT1M
Formatduration

Check interval

Interval between polling evaluations.

Reference (ref) of the pluginDefaults to apply to this trigger.

SubTypestring
Possible Values
CREATEDSUBMITTEDRUNNINGPAUSEDRESTARTEDKILLINGSUCCESSWARNINGFAILEDKILLEDCANCELLEDQUEUEDRETRYINGRETRIEDSKIPPEDBREAKPOINTRESUBMITTED

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

The captured rendered condition output

The exit code of the executed commands

Formatdate-time

Timestamp of the event that fired the trigger

Output variables captured from the commands

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