Kandarai OS based on Fedora Atomic.

There's two images. Kandari and Kandari NVIDIA. Use one according to your hardware.

To rebase an existing atomic Fedora installation to the latest build:

• First rebase to the unsigned Kandari image, to get the proper signing keys and policies installed:

  rpm-ostree rebase ostree-unverified-registry:ghcr.io/tazihad/kandari:latest
  

• Nvidia Kandari unsigned build:

  rpm-ostree rebase ostree-unverified-registry:ghcr.io/tazihad/kandari-nvidia:latest
  

• Reboot to complete the rebase:

  systemctl reboot
  

• Then rebase to the signed Kandari image, like so:

  rpm-ostree rebase ostree-image-signed:docker:https://ghcr.io/tazihad/kandari:latest
  

• Or rebase to Nvidia Kandari Signed image:

  rpm-ostree rebase ostree-image-signed:docker:https://ghcr.io/tazihad/kandari-nvidia:latest
  

• Reboot again to complete the installation

  systemctl reboot
  

Install signed image without rebasing to unsigned image.

• Install the public key:

  sudo mkdir -p /etc/pki/containers
  curl -O "https://raw.githubusercontent.com/tazihad/kandari/main/cosign.pub" -o kandari.pub
  sudo cp kandari.pub /etc/pki/containers/
  sudo restorecon -RFv /etc/pki/containers
  

• Configure the registry to get sigstore signatures:
  Create and edit the configuration file for your registry:

  sudo mkdir -p /etc/containers/registries.d
  sudo nano /etc/containers/registries.d/ghcr.io-tazihad-kandari.yaml
  

  Add the following content:

  docker:
    ghcr.io/tazihad/kandari:
      use-sigstore-attachments: true
  

  Save the file and then run:

  sudo restorecon -RFv /etc/containers/registries.d/ghcr.io-tazihad-kandari.yaml
  

• Set up the policy: Create a policy file and add the following content:

  sudo cp /etc/containers/policy.json /etc/containers/policy.json.bak # Backup existing policy
  sudo nano /etc/containers/policy.json
  

  Add the following content, replacing the placeholders with your actual paths:

  {
      "default": [
          {
              "type": "reject"
          }
      ],
      "transports": {
          "docker": {
              "ghcr.io/tazihad/kandari": [
                  {
                      "type": "sigstoreSigned",
                      "keyPath": "/etc/pki/containers/kandari.pub",
                      "signedIdentity": {
                          "type": "matchRepository"
                      }
                  }
              ],
              "": [
                  {
                      "type": "insecureAcceptAnything"
                  }
              ]
          }
      }
  }
  

  Save the file and then run:

  sudo restorecon -RFv /etc/containers/policy.json
  

  Now, your setup for verifying kandari container images using cosign with the renamed public key kandari.pub should be complete.

These images are signed with Sigstore's cosign. You can verify the signature by downloading the kandari.pub file from this repo and running the following command:

cosign verify --key kandari.pub ghcr.io/tazihad/kandari-nvidia:latest