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Easy task and workflow monitoring & automation

Monitor, manage, and orchestrate on-demand tasks, scheduled tasks, and long-running services with CloudReactor’s easy-to-use dashboard. Deploy tasks with a single command to AWS ECS Fargate.

Use this one-page guide to get up and running with key CloudReactor features. See additional pages in left nav bar for more features and advanced topics.

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Table of contents

  1. Getting Started
    1. Decide on an integration level
    2. Create a CloudReactor account
    3. Setup a Run Environment
    4. Create a CloudReactor API Key
    5. Set environment variables
    6. Install the wrapper and modify your command line
    7. View the Task in CloudReactor
    8. Set up notifications (optional)
  2. Improvements
  3. Contact us

Getting Started

Decide on an integration level

First, decide on how much effort you’re willing to invest in return for the features you want. The following table shows the tradeoffs:

Integration Level Monitored Managed Requires Deployment Changes Requires CloudReactor Access Grant
Offline No No Minimal No
Passive Yes Stop only Minimal No
Simple Yes Standard, for Fargate Tasks Minimal Yes
Full Yes Enhanced, for Fargate Tasks Yes Yes

All integration levels gain these features provided by proc_wrapper:

  • Retries and time limits on wrapped processes
  • Secret injection from AWS Secrets Manager and extraction into the process environment

The Monitored column in the table above refers to the ability to see the current status of a Task and receiving notifications when the Task has a problem. proc_wrapper reports heartbeats to CloudReactor when it runs your code, and you can view the last heartbeat time in the CloudReactor dashboard. Your process can also report status information like success counts, failure counts, status messages, etc. which and are displayed in the CloudReactor dashboard. You can also configure CloudReactor to send notifications if your Task fails, takes too long to run, exits early, or if your Task isn’t run on schedule. Monitored Tasks also have their execution history stored in CloudReactor so you can see what happened in previous executions and view trends. To enable monitoring, the following are required:

  • A free CloudReactor account
  • Minimal changes to your deployment process to set some environment variables, and to wrap your code with proc_wrapper

The Passive integration level provides monitoring with a minimal amount of configuration and deployment changes. It is also compatible with any execution method that uses a command-line in Linux, Windows, or any operating system with python 3.6 or higher installed.

The Simple integration level allows CloudReactor to start Tasks that are run in AWS ECS, and orchestrate them in Workflows. To enable these capabilities, you need to install the CloudReactor CloudFormation Template. The template can be installed manually or by using the AWS Setup Wizard which guides you through the steps. The wizard can also setup all AWS infrastructure needed to run tasks in ECS Fargate.

In the guide below, we’ll assume you chose the Passive or Simple integration level, as they require only minimal changes to your application.

Create a CloudReactor account

First, sign up for a CloudReactor account. No credit card is required, and there is a free plan available.

Setup a Run Environment

If you chose the Passive integration level, the next step is to create a Run Environment. Navigate to Run Environments and select the Create new Run Environment ... button. Give your Run Environment a name, leave the Enable CloudReactor to manage Tasks in AWS ECS checkbox unchecked since you are using the Passive option, then hit the Save button.

If, instead, you chose the Simple integration level, follow the instructions for granting CloudReactor Task management access, then proceed with the steps below.

Create a CloudReactor API Key

Now, create an API key your Task will use to authenticate with CloudReactor. Select your username in the upper right corner of the dashboard, then in the popup menu, select API Keys. On the following page, hit the button labeled Add a new API key .... On the following page,

  1. Give your API key a name.
  2. Choose the Run Environment you just created. You may also choose Any if you want to reuse the API key in different Run Environments.
  3. Select Developer Access Level of as your program will create a Task in CloudReactor the first time it is run.
  4. Hit the Save button.
  5. You will be taken back a list of your API keys. On the row with the key you just created, use the copy button to copy the API key to your clipboard.

Set environment variables

Assuming your code is started via a command line, proc_wrapper reads its configuration from environment variables. The minimum set for an auto-created, passive Task is:

  • PROC_WRAPPER_TASK_NAME - set to whatever you want to name the Task in CloudReactor
  • PROC_WRAPPER_API_KEY - set to the value of the API key you created above
  • PROC_WRAPPER_AUTO_CREATE_TASK_RUN_ENVIRONMENT_NAME - set to the name of the Run Environment you created above

Arrange to have these environment variables set before the command line is executed.

Install the wrapper and modify your command line

Finally, just prepend a call to the CloudReactor proc_wrapper standalone executable or python module to your existing command line. For example, if your code was started with the command line:

    java -jar app.jar

you would instead use the command line:

    ./proc_wrapper java -jar app.jar

after downloading the standalone executable proc_wrapper from the releases page. Standalone executables are available for both 64-bit Linux and Windows.

Or, if you have python 3.6 or higher installed in your environment, use the command line:

    python -m proc_wrapper java -jar app.jar

after installing the cloudreactor-procwrapper python module.

View the Task in CloudReactor

Now, after the first time your Task executes, it will show up in the CloudReactor dashboard! While your Task is running, you can stop it using the Stop button in the dashboard.

You’ll be able see:

  1. The current status of your Task (running or stopped), and the last time it sent a heartbeat
  2. A history of previous executions of your Task, including start times, durations, and exit codes

Set up notifications (optional)

Now that your Task is monitored by CloudReactor, you can set up notifications via PagerDuty or email, that trigger when your Task fails, succeeds, times out, stops sending heartbeats, or doesn’t run as scheduled. See the notifications guide for instructions.


  • To avoid leaking secrets (passwords, API keys, etc.), see the guide on secret management
  • To allow CloudReactor to start Tasks on your behalf, thus enabling manual starting in the dashboard, and Workflows, follow the full integration level instructions

Contact us

Hopefully, this guide has helped you add monitoring to your tasks, with a minimum of changes. Feel free to reach out to us at to upgrade to a paid account with more limits, or if you have any questions or issues!