Скачать или смотреть How to Decode and Split a String in Ansible

Learn how to decode a base64 encoded string and split it to extract values like username and password in Ansible with easy-to-follow instructions and a practical example.
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How to Decode and Split a String in Ansible: A Step-by-Step Guide

Working with encoded strings is a common task in various automation scripts, including those written in Ansible. One such scenario is when you need to decode a base64 encoded string that contains sensitive information, like a username and password, separated by a colon. In this guide, we’ll walk through the steps to properly decode and split this string in Ansible, providing you with a clear understanding of how to achieve it.

The Problem

You have a base64 encoded string that looks like this:

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

When decoded, it reveals a username and password in the following format:

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

Your goal is to extract both the username and password using an Ansible playbook, but running your initial attempts at splitting the string has not been successful. Let’s delve into a solution that will work.

The Solution

Step 1: Decode the String

To decode a base64 string in Ansible, you can use the b64decode filter. In your playbook, you should first decode the string and register the output for later use. Here’s how you can do that:

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

This command will output the decoded string and store it in a variable called user_pass.

Step 2: Split the Decoded String

Now that you have the decoded string with both the username and password, the next step is to split this string into its components. You can make use of the split filter to achieve this conveniently. Here is how you can set a new fact with the split values:

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

In this example, we split the decoded string at the colon (:) and store the resulting values into user_and_pass.

Step 3: Retrieve the Values

With the username and password now stored in the user_and_pass variable, you can easily access each component as follows:

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

This will effectively print out both the username and password.

Complete Playbook Example

For clarity, here’s how the entire playbook should look:

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

Important Consideration

Be cautious if the username or password contains a colon (:) because this will disrupt the splitting process. In the event that either value might contain this character, consider using a different separator when encoding.

Conclusion

Successfully decoding a base64 encoded string and extracting values in Ansible is straightforward when you utilize the available filters effectively. By following the steps outlined in this guide, you can easily manipulate and retrieve useful information from encoded strings in your playbooks. Happy automating!