Upgrade EKS Module from Version 17.23 to 20

[velotioaastha]

We are currently utilizing version 17.23 of our EKS module. The latest available version is 20.00, and we need to upgrade to this version to take advantage of new features and improvements. This upgrade will require testing each interim version for compatibility and functionality to ensure a smooth transition.

Tasks

1. Assessment and Planning:

   • Evaluate the change logs between versions 17.23 and 20.00.
   • Determine if the upgrade can be directly applied or if incremental upgrades through intermediate versions are necessary.

2. Development:

   • If needed, break down the upgrade into multiple pull requests (PRs) for each version step to isolate changes and simplify review processes.
   • Develop scripts to automate any necessary changes in Terraform state files.

3. Testing:

   • Set up a test environment to trial the migration process.
   • Ensure all functionalities work as expected after each upgrade step.
   • Perform regression testing to validate the stability of the system.

4. Documentation:

   • Document the upgrade process thoroughly, including any necessary changes in the Terraform state.
   • Provide detailed instructions and scripts for applying these changes in customer environments.

5. Deployment:

   • Plan the deployment to production, ensuring minimal downtime and backup strategies are in place.
   • Monitor system stability and performance post-upgrade.

Acceptance Criteria

• The system successfully runs on EKS module version 20.00 without any loss of functionality.
• We are able to upgrade to 20 without loasing data
• All Terraform state modifications are scripted and can be automated.
• Comprehensive documentation is available for the migration process

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As a result of this upgrade we don't need to touch vpn cni. We can remove these as part of the upgrade process