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Learn how to efficiently extract the `item` value from a `with_sequence` loop in Ansible to enhance your automation scripts.
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This video is based on the question https://stackoverflow.com/q/63281856/ asked by the user 'Benny' ( https://stackoverflow.com/u/4005431/ ) and on the answer https://stackoverflow.com/a/63287733/ provided by the user 'mdaniel' ( https://stackoverflow.com/u/225016/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Retrieve the item Value from a with_sequence Loop in Ansible

Managing configurations and tasks in Ansible can sometimes feel complex, especially when you're dealing with loops. One common question that arises is how to retrieve the index value (denoted by {{ item }}) in a with_sequence loop after the task has run. This post will guide you through the solution step by step.

The Problem

Imagine you are using a loop in Ansible to create or manage resources dynamically, and you use the with_sequence directive. After your tasks complete, you might be wondering how to access the {{ item }} value that was generated during each iteration of the loop.

Example Code

Here’s an example where this question typically arises:

[[See Video to Reveal this Text or Code Snippet]]

The crux of the matter is that after executing this block of code, it may seem impossible to retrieve the value of {{ item }}.

The Solution

Don’t panic! The key to accessing the item value is to utilize the register feature effectively. Here’s how to do it:

Step 1: Register the Loop Results

When you register a result using register: dns_record, Ansible captures the output of your task, including a results list. This structure provides a snapshot of what occurred during each iteration, including the item variable.

Step 2: Debug the Registered Variable

Insert a debugging task right after your loop to inspect the registered variable, which can be done as follows:

[[See Video to Reveal this Text or Code Snippet]]

Understanding the Output

When you run the above code, your debug task will produce an output like this:

[[See Video to Reveal this Text or Code Snippet]]

Here’s what you should notice:

The results key contains a list of dictionaries.

Each dictionary holds the index value in the item key, corresponding to the sequence generated during each iteration.

Step 3: Accessing Individual item Values

Once you have the output, you can loop through the_items.results to access each individual item value and manipulate it as needed in your ensuing tasks.

Conclusion

Retrieving the item value from a with_sequence loop in Ansible is straightforward once you understand how to register and inspect loop results. Utilize the register directive and Debug your results to gain insights into the iteration process.

Now you can confidently manage dynamic tasks in your Ansible playbooks without losing track of loop indices!

Happy automating!