EventBridgeScheduler / Client / update_schedule



Updates the specified schedule. When you call UpdateSchedule, EventBridge Scheduler uses all values, including empty values, specified in the request and overrides the existing schedule. This is by design. This means that if you do not set an optional field in your request, that field will be set to its system-default value after the update.

Before calling this operation, we recommend that you call the GetSchedule API operation and make a note of all optional parameters for your UpdateSchedule call.

See also: AWS API Documentation

Request Syntax

response = client.update_schedule(
    EndDate=datetime(2015, 1, 1),
        'MaximumWindowInMinutes': 123,
        'Mode': 'OFF'|'FLEXIBLE'
    StartDate=datetime(2015, 1, 1),
        'Arn': 'string',
        'DeadLetterConfig': {
            'Arn': 'string'
        'EcsParameters': {
            'CapacityProviderStrategy': [
                    'base': 123,
                    'capacityProvider': 'string',
                    'weight': 123
            'EnableECSManagedTags': True|False,
            'EnableExecuteCommand': True|False,
            'Group': 'string',
            'LaunchType': 'EC2'|'FARGATE'|'EXTERNAL',
            'NetworkConfiguration': {
                'awsvpcConfiguration': {
                    'AssignPublicIp': 'ENABLED'|'DISABLED',
                    'SecurityGroups': [
                    'Subnets': [
            'PlacementConstraints': [
                    'expression': 'string',
                    'type': 'distinctInstance'|'memberOf'
            'PlacementStrategy': [
                    'field': 'string',
                    'type': 'random'|'spread'|'binpack'
            'PlatformVersion': 'string',
            'PropagateTags': 'TASK_DEFINITION',
            'ReferenceId': 'string',
            'Tags': [
                    'string': 'string'
            'TaskCount': 123,
            'TaskDefinitionArn': 'string'
        'EventBridgeParameters': {
            'DetailType': 'string',
            'Source': 'string'
        'Input': 'string',
        'KinesisParameters': {
            'PartitionKey': 'string'
        'RetryPolicy': {
            'MaximumEventAgeInSeconds': 123,
            'MaximumRetryAttempts': 123
        'RoleArn': 'string',
        'SageMakerPipelineParameters': {
            'PipelineParameterList': [
                    'Name': 'string',
                    'Value': 'string'
        'SqsParameters': {
            'MessageGroupId': 'string'
  • ActionAfterCompletion (string) – Specifies the action that EventBridge Scheduler applies to the schedule after the schedule completes invoking the target.

  • ClientToken (string) –

    Unique, case-sensitive identifier you provide to ensure the idempotency of the request. If you do not specify a client token, EventBridge Scheduler uses a randomly generated token for the request to ensure idempotency.

    This field is autopopulated if not provided.

  • Description (string) – The description you specify for the schedule.

  • EndDate (datetime) – The date, in UTC, before which the schedule can invoke its target. Depending on the schedule’s recurrence expression, invocations might stop on, or before, the EndDate you specify. EventBridge Scheduler ignores EndDate for one-time schedules.

  • FlexibleTimeWindow (dict) –


    Allows you to configure a time window during which EventBridge Scheduler invokes the schedule.

    • MaximumWindowInMinutes (integer) –

      The maximum time window during which a schedule can be invoked.

    • Mode (string) – [REQUIRED]

      Determines whether the schedule is invoked within a flexible time window.

  • GroupName (string) – The name of the schedule group with which the schedule is associated. You must provide this value in order for EventBridge Scheduler to find the schedule you want to update. If you omit this value, EventBridge Scheduler assumes the group is associated to the default group.

  • KmsKeyArn (string) – The ARN for the customer managed KMS key that that you want EventBridge Scheduler to use to encrypt and decrypt your data.

  • Name (string) –


    The name of the schedule that you are updating.

  • ScheduleExpression (string) –


    The expression that defines when the schedule runs. The following formats are supported.

    • at expression - at(yyyy-mm-ddThh:mm:ss)

    • rate expression - rate(value unit)

    • cron expression - cron(fields)

    You can use at expressions to create one-time schedules that invoke a target once, at the time and in the time zone, that you specify. You can use rate and cron expressions to create recurring schedules. Rate-based schedules are useful when you want to invoke a target at regular intervals, such as every 15 minutes or every five days. Cron-based schedules are useful when you want to invoke a target periodically at a specific time, such as at 8:00 am (UTC+0) every 1st day of the month.

    A cron expression consists of six fields separated by white spaces: (minutes hours day_of_month month day_of_week year).

    A rate expression consists of a value as a positive integer, and a unit with the following options: minute | minutes | hour | hours | day | days

    For more information and examples, see Schedule types on EventBridge Scheduler in the EventBridge Scheduler User Guide.

  • ScheduleExpressionTimezone (string) – The timezone in which the scheduling expression is evaluated.

  • StartDate (datetime) – The date, in UTC, after which the schedule can begin invoking its target. Depending on the schedule’s recurrence expression, invocations might occur on, or after, the StartDate you specify. EventBridge Scheduler ignores StartDate for one-time schedules.

  • State (string) – Specifies whether the schedule is enabled or disabled.

  • Target (dict) –


    The schedule target. You can use this operation to change the target that your schedule invokes.

    • Arn (string) – [REQUIRED]

      The Amazon Resource Name (ARN) of the target.

    • DeadLetterConfig (dict) –

      An object that contains information about an Amazon SQS queue that EventBridge Scheduler uses as a dead-letter queue for your schedule. If specified, EventBridge Scheduler delivers failed events that could not be successfully delivered to a target to the queue.

      • Arn (string) –

        The Amazon Resource Name (ARN) of the SQS queue specified as the destination for the dead-letter queue.

    • EcsParameters (dict) –

      The templated target type for the Amazon ECS RunTask API operation.

      • CapacityProviderStrategy (list) –

        The capacity provider strategy to use for the task.

        • (dict) –

          The details of a capacity provider strategy.

          • base (integer) –

            The base value designates how many tasks, at a minimum, to run on the specified capacity provider. Only one capacity provider in a capacity provider strategy can have a base defined. If no value is specified, the default value of 0 is used.

          • capacityProvider (string) – [REQUIRED]

            The short name of the capacity provider.

          • weight (integer) –

            The weight value designates the relative percentage of the total number of tasks launched that should use the specified capacity provider. The weight value is taken into consideration after the base value, if defined, is satisfied.

      • EnableECSManagedTags (boolean) –

        Specifies whether to enable Amazon ECS managed tags for the task. For more information, see Tagging Your Amazon ECS Resources in the Amazon ECS Developer Guide.

      • EnableExecuteCommand (boolean) –

        Whether or not to enable the execute command functionality for the containers in this task. If true, this enables execute command functionality on all containers in the task.

      • Group (string) –

        Specifies an ECS task group for the task. The maximum length is 255 characters.

      • LaunchType (string) –

        Specifies the launch type on which your task is running. The launch type that you specify here must match one of the launch type (compatibilities) of the target task. The FARGATE value is supported only in the Regions where Fargate with Amazon ECS is supported. For more information, see AWS Fargate on Amazon ECS in the Amazon ECS Developer Guide.

      • NetworkConfiguration (dict) –

        This structure specifies the network configuration for an ECS task.

        • awsvpcConfiguration (dict) –

          Specifies the Amazon VPC subnets and security groups for the task, and whether a public IP address is to be used. This structure is relevant only for ECS tasks that use the awsvpc network mode.

          • AssignPublicIp (string) –

            Specifies whether the task’s elastic network interface receives a public IP address. You can specify ENABLED only when LaunchType in EcsParameters is set to FARGATE.

          • SecurityGroups (list) –

            Specifies the security groups associated with the task. These security groups must all be in the same VPC. You can specify as many as five security groups. If you do not specify a security group, the default security group for the VPC is used.

            • (string) –

          • Subnets (list) – [REQUIRED]

            Specifies the subnets associated with the task. These subnets must all be in the same VPC. You can specify as many as 16 subnets.

            • (string) –

      • PlacementConstraints (list) –

        An array of placement constraint objects to use for the task. You can specify up to 10 constraints per task (including constraints in the task definition and those specified at runtime).

        • (dict) –

          An object representing a constraint on task placement.

          • expression (string) –

            A cluster query language expression to apply to the constraint. You cannot specify an expression if the constraint type is distinctInstance. For more information, see Cluster query language in the Amazon ECS Developer Guide.

          • type (string) –

            The type of constraint. Use distinctInstance to ensure that each task in a particular group is running on a different container instance. Use memberOf to restrict the selection to a group of valid candidates.

      • PlacementStrategy (list) –

        The task placement strategy for a task or service.

        • (dict) –

          The task placement strategy for a task or service.

          • field (string) –

            The field to apply the placement strategy against. For the spread placement strategy, valid values are instanceId (or instanceId, which has the same effect), or any platform or custom attribute that is applied to a container instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid values are cpu and memory. For the random placement strategy, this field is not used.

          • type (string) –

            The type of placement strategy. The random placement strategy randomly places tasks on available candidates. The spread placement strategy spreads placement across available candidates evenly based on the field parameter. The binpack strategy places tasks on available candidates that have the least available amount of the resource that is specified with the field parameter. For example, if you binpack on memory, a task is placed on the instance with the least amount of remaining memory (but still enough to run the task).

      • PlatformVersion (string) –

        Specifies the platform version for the task. Specify only the numeric portion of the platform version, such as 1.1.0.

      • PropagateTags (string) –

        Specifies whether to propagate the tags from the task definition to the task. If no value is specified, the tags are not propagated. Tags can only be propagated to the task during task creation. To add tags to a task after task creation, use Amazon ECS’s TagResource API action.

      • ReferenceId (string) –

        The reference ID to use for the task.

      • Tags (list) –

        The metadata that you apply to the task to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define. For more information, see RunTask in the Amazon ECS API Reference.

        • (dict) –

          • (string) –

            • (string) –

      • TaskCount (integer) –

        The number of tasks to create based on TaskDefinition. The default is 1.

      • TaskDefinitionArn (string) – [REQUIRED]

        The Amazon Resource Name (ARN) of the task definition to use if the event target is an Amazon ECS task.

    • EventBridgeParameters (dict) –

      The templated target type for the EventBridge PutEvents API operation.

      • DetailType (string) – [REQUIRED]

        A free-form string, with a maximum of 128 characters, used to decide what fields to expect in the event detail.

      • Source (string) – [REQUIRED]

        The source of the event.

    • Input (string) –

      The text, or well-formed JSON, passed to the target. If you are configuring a templated Lambda, AWS Step Functions, or Amazon EventBridge target, the input must be a well-formed JSON. For all other target types, a JSON is not required. If you do not specify anything for this field, EventBridge Scheduler delivers a default notification to the target.

    • KinesisParameters (dict) –

      The templated target type for the Amazon Kinesis PutRecord API operation.

    • RetryPolicy (dict) –

      A RetryPolicy object that includes information about the retry policy settings, including the maximum age of an event, and the maximum number of times EventBridge Scheduler will try to deliver the event to a target.

      • MaximumEventAgeInSeconds (integer) –

        The maximum amount of time, in seconds, to continue to make retry attempts.

      • MaximumRetryAttempts (integer) –

        The maximum number of retry attempts to make before the request fails. Retry attempts with exponential backoff continue until either the maximum number of attempts is made or until the duration of the MaximumEventAgeInSeconds is reached.

    • RoleArn (string) – [REQUIRED]

      The Amazon Resource Name (ARN) of the IAM role that EventBridge Scheduler will use for this target when the schedule is invoked.

    • SageMakerPipelineParameters (dict) –

      The templated target type for the Amazon SageMaker StartPipelineExecution API operation.

      • PipelineParameterList (list) –

        List of parameter names and values to use when executing the SageMaker Model Building Pipeline.

        • (dict) –

          The name and value pair of a parameter to use to start execution of a SageMaker Model Building Pipeline.

          • Name (string) – [REQUIRED]

            Name of parameter to start execution of a SageMaker Model Building Pipeline.

          • Value (string) – [REQUIRED]

            Value of parameter to start execution of a SageMaker Model Building Pipeline.

    • SqsParameters (dict) –

      The templated target type for the Amazon SQS SendMessage API operation. Contains the message group ID to use when the target is a FIFO queue. If you specify an Amazon SQS FIFO queue as a target, the queue must have content-based deduplication enabled. For more information, see Using the Amazon SQS message deduplication ID in the Amazon SQS Developer Guide.

      • MessageGroupId (string) –

        The FIFO message group ID to use as the target.

Return type:



Response Syntax

    'ScheduleArn': 'string'

Response Structure

  • (dict) –

    • ScheduleArn (string) –

      The Amazon Resource Name (ARN) of the schedule that you updated.