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# Paramètres de configuration pour définir les actions et les arguments
<a name="custom-bootstrap-actions-config-v3"></a>

Les paramètres de configuration suivants sont utilisés pour définir les [`HeadNode`[`OnNodeConfigured`](Scheduling-v3.md#yaml-Scheduling-SlurmQueues-CustomActions-OnNodeConfigured)](HeadNode-v3.md)actions [`OnNodeStart`](HeadNode-v3.md#yaml-HeadNode-CustomActions-OnNodeStart)et [`OnNodeConfigured`](HeadNode-v3.md#yaml-HeadNode-CustomActions-OnNodeConfigured)les arguments [`Scheduling`](Scheduling-v3.md)/[`CustomActions`](Scheduling-v3.md#Scheduling-v3-SlurmQueues-CustomActions)/[`OnNodeStart`](Scheduling-v3.md#yaml-Scheduling-SlurmQueues-CustomActions-OnNodeStart)& & et//&. [`CustomActions`[`OnNodeUpdated`](HeadNode-v3.md#yaml-HeadNode-CustomActions-OnNodeUpdated)](HeadNode-v3.md#HeadNode-v3-CustomActions)

```
HeadNode:
  [...]
  CustomActions:
    OnNodeStart:
      # Script URL. This is run before any of the bootstrap scripts are run
      Script: s3://amzn-s3-demo-bucket/on-node-start.sh
      Args:
        - arg1
    OnNodeConfigured:
      # Script URL. This is run after all the bootstrap scripts are run
      Script: s3://amzn-s3-demo-bucket/on-node-configured.sh
      Args:
        - arg1
    OnNodeUpdated:
      # Script URL. This is run after the head node update is completed.
      Script: s3://amzn-s3-demo-bucket/on-node-updated.sh
      Args:
        - arg1
  # Bucket permissions
  Iam:
    S3Access:
      - BucketName: bucket_name
        EnableWriteAccess: false
Scheduling:
  Scheduler: slurm
   [...]
  SlurmQueues:
    - Name: queue1
      [...]
      CustomActions:
        OnNodeStart:
          Script: s3://amzn-s3-demo-bucket/on-node-start.sh
          Args:
            - arg1
        OnNodeConfigured:
          Script: s3://amzn-s3-demo-bucket/on-node-configured.sh
          Args:
            - arg1
      Iam:
        S3Access:
          - BucketName: bucket_name
            EnableWriteAccess: false
```

En utilisant le `Sequence` paramètre (ajouté dans la AWS ParallelCluster version 3.6.0) :

```
HeadNode:
  [...]
  CustomActions:
    OnNodeStart:
      # Script URLs. The scripts are run in the same order as listed in the configuration, before any of the bootstrap scripts are run.
      Sequence:
        - Script: s3://amzn-s3-demo-bucket/on-node-start1.sh
          Args:
            - arg1
        - Script: s3://amzn-s3-demo-bucket/on-node-start2.sh
          Args:
            - arg1
        [...]
    OnNodeConfigured:
      # Script URLs. The scripts are run in the same order as listed in the configuration, after all the bootstrap scripts are run.
      Sequence:
        - Script: s3://amzn-s3-demo-bucket/on-node-configured1.sh
          Args:
            - arg1
        - Script: s3://amzn-s3-demo-bucket/on-node-configured2.sh
          Args:
            - arg1
        [...]
    OnNodeUpdated:
      # Script URLs. The scripts are run in the same order as listed in the configuration, after the head node update is completed.
      Sequence:
        - Script: s3://amzn-s3-demo-bucket/on-node-updated1.sh
          Args:
            - arg1
        - Script: s3://amzn-s3-demo-bucket/on-node-updated2.sh
          Args:
            - arg1
        [...]
  # Bucket permissions
  Iam:
    S3Access:
      - BucketName: bucket_name
        EnableWriteAccess: false
Scheduling:
  Scheduler: slurm
   [...]
  SlurmQueues:
    - Name: queue1
      [...]
      CustomActions:
        OnNodeStart:
          # Script URLs. The scripts are run in the same order as listed in the configuration, before any of the bootstrap scripts are run
          Sequence:
            - Script: s3://amzn-s3-demo-bucket/on-node-start1.sh
              Args:
                - arg1
            - Script: s3://amzn-s3-demo-bucket/on-node-start2.sh
              Args:
                - arg1
            [...]
        OnNodeConfigured:
          # Script URLs. The scripts are run in the same order as listed in the configuration, after all the bootstrap scripts are run
          Sequence:
            - Script: s3://amzn-s3-demo-bucket/on-node-configured1.sh
              Args:
                - arg1
            - Script: s3://amzn-s3-demo-bucket/on-node-configured2.sh
              Args:
                - arg1
            [...]
      Iam:
        S3Access:
          - BucketName: bucket_name
            EnableWriteAccess: false
```

Le `Sequence` paramètre est ajouté à partir de la AWS ParallelCluster version 3.6.0. Lorsque vous le spécifiez`Sequence`, vous pouvez répertorier plusieurs scripts pour une action personnalisée. AWS ParallelCluster continue de prendre en charge la configuration d'une action personnalisée avec un seul script, sans inclure`Sequence`.

AWS ParallelCluster ne permet pas d'inclure à la fois un seul script et `Sequence` pour la même action personnalisée. Par exemple, AWS ParallelCluster échoue si vous spécifiez la configuration suivante.

```
[...]
  CustomActions:
    OnNodeStart:
      # Script URL. This is run before any of the bootstrap scripts are run
      Script: s3://amzn-s3-demo-bucket/on-node-start.sh
          Args:
            - arg1
      # Script URLs. The scripts are run in the same order as listed in the configuration, before any of the bootstrap scripts are run.
      Sequence:
        - Script: s3://amzn-s3-demo-bucket/on-node-start1.sh
          Args:
            - arg1
        - Script: s3://amzn-s3-demo-bucket/on-node-start2.sh
          Args:
            - arg1
[...]
```