ITEP-68660 online installation of k3s + handling local registry

Mirror Botrequested to merge
jchrapko/ITEP-68660_k3s_online_installation_reg into feature/installer-v2

Created by: jcchr

📝 Description

Replace offline installation of k3s with its online counterparts. It reduces the number of images that have to be downloaded - reducing the time required to install the platform. Additionally - it allows to define a local registry for external components.

✨ Type of Change

Select the type of change your PR introduces:

  • 🐞 Bug fix – Non-breaking change which fixes an issue
  • 🚀 New feature – Non-breaking change which adds functionality
  • 🔨 Refactor – Non-breaking change which refactors the code base
  • 💥 Breaking change – Changes that break existing functionality
  • 📚 Documentation update
  • 🔒 Security update
  • 🧪 Tests

🧪 Testing Scenarios

Check if after the change there are no superfluous images downloaded - like docker.io/rancher/klipper-helm, docker.io/rancher/klipper-lb, docker.io/rancher/mirrored-library-traefik

  • ✅ Tested manually
  • 🤖 Run automated end-to-end tests

✅ Checklist

Before submitting the PR, ensure the following:

  • 🔍 PR title is clear and descriptive
  • 📝 For internal contributors: If applicable, include the JIRA ticket number (e.g., ITEP-123456) in the PR title. Do not include full URLs
  • 💬 I have commented my code, especially in hard-to-understand areas
  • 📄 I have made corresponding changes to the documentation
  • ✅ I have added tests that prove my fix is effective or my feature works

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