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CD tool for detecting and deploying images from private registry into airgap k8s cluster

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I have the following airgap infrastructure:

  • Jump host VM with Internet access containing a private registry replicating images as they become available
  • Arbitrary number of VM's, one of which is the control plane and has only access to the jump host VM, and the rest contain k8s workers

I am searching for a CD tool which would be able to do the following:

  • Reside on the control plain k8s cluster
  • Be able to actively listen for new images on the jump host VM containing the private registry
  • Web GUI which will provide the end user with an approval based system to deploy the new image
  • Be able to control the deployment workflow by changing the image:tag. Once it's deployed to test, replace existing tag with ex. v1.5-test. At this point the image would be ready to be deployed to the next environment: UAT. After approval, once it's deployed there, rename the existing tag to v1.5-uat. And finally it's ready to be deployed to production with an approval as well.

If this is not a good deployment workflow, I would also be glad to hear about a better one.

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