​Script ​Tasks (​Code in ​Any ​Language)

Kestra is language agnostic. Write your business logic in any language.

You can orchestrate custom business logic written in Python, R, Julia, Ruby, Node.js, Powershell and Shell scripts, and you can also build custom plugins in Java.

By default, these tasks run in individual Docker containers (taskRunner type: io.kestra.plugin.scripts.runner.docker.Docker). You can overwrite that default behavior if you prefer that your scripts run in a local process (taskRunner type: io.kestra.plugin.core.runner.Process) instead.

If you use a commercial version of Kestra, you can also run your scripts on dedicated remote workers by specifying a workerGroup property or using other Task Runner types for AWS, GCP, Azure and Kubernetes.

The following pages dive into details of each task runner, supported programming languages and how to manage dependencies.

Programming Languages

Kestra is language agnostic. Use any programming language inside of your workflows.

Commands and Script tasks

Types of tasks for executing programming languages.

Inline Scripts in Docker

Writing code directly inside your task.

DOCKER and PROCESS runners

Manage the environment your code is executed with runner.

Building a Custom Docker Image

Build a custom Docker image for your script tasks.

Installing Dependencies at Runtime

Install dependencies at runtime using beforeCommands.

Outputs and Metrics

Send Outputs and Metrics back to Kestra.

Input and Output Files

Manage Input and Output files with your scripts.

Bind Mount

Use bind-mount to execute locally stored scripts.

Git Clone task

Clone a Git repository and use the files in your tasks.

Working Directory

Run multiple tasks in the same working directory sequentially.