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Learn how to get the status of your OpenShift cron jobs with REST_API by managing permissions and roles effectively. Follow our guide for clear instructions!
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This video is based on the question https://stackoverflow.com/q/63896032/ asked by the user 'dataplumber' ( https://stackoverflow.com/u/8522104/ ) and on the answer https://stackoverflow.com/a/63896518/ provided by the user 'derkoe' ( https://stackoverflow.com/u/3248158/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Accessing OpenShift Cron Job Status Using REST_API

Managing cron jobs in OpenShift can be a daunting task, especially when you're limited to namespace access without cluster-level privileges. This scenario raises a common question among OpenShift administrators: How can I use REST_API to fetch the status of my cron jobs?

In this post, we will explore the steps necessary to set the appropriate permissions and retrieve the desired status of cron jobs, jobs, and pods within your namespace. Let’s get started!

The Challenge: Limited Access and Role Management

You're an admin for your namespace, but without cluster access, you can only work within the boundaries of your assigned namespace. When attempting to create a role for monitoring your cron jobs, you encounter issues adding that role to a service account. Here are the crucial commands involved:

Creating a Role:

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

Adding the Role to a Service Account:

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Unfortunately, when you run the second command, you receive an error stating that the role 'podreader' cannot be found, indicating a misunderstanding of the role's scope.

The Solution: Correctly Adding the Role

To resolve the issue, it is crucial to use the correct command syntax for adding the role to your service account. The command should specify the namespace in which the role is defined. Here’s how to do it correctly:

Step 1: Adding Namespace to the Role Command

When using the oc policy add-role-to-user command, include the --role-namespace= flag to define the namespace of the role. The command now looks like this:

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

Step 2: Execute Your Commands

With the modifications made, execute the following commands in sequence:

Create the role that allows access to the required resources:

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

Create the service account:

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

Add the role to the service account, specifying the role's namespace:

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

Step 3: Verify Your Role Assignment

After executing the commands, ensure that your service account is properly assigned the necessary role. This can typically be accomplished with the following command:

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

Conclusion

By following these steps and ensuring you specify the namespace while adding roles to service accounts, you can successfully get the status of your cron jobs, jobs, and pods within OpenShift without needing cluster access. This not only results in better management and execution of your monitoring tasks but also enhances your understanding of role-based access control (RBAC) in Kubernetes environments.

Now that you’ve learned how to effectively access cron job statuses, you can monitor your scheduled jobs with ease. Happy monitoring!