Kasten K10 Starter Series 04 – Offline Image Download Script

Series Index

• Part 1 – Single-Node Lab
• Part 2 – Install K10
• Part 3 – Backup & Restore

Why This Script Exists

Downloading K10 can be painful—especially if you’re used to Veeam’s tidy installers. Kasten’s docs describe deployment, but there’s no simple download link. Everything lives under gcr.io, which is unreachable from many regions. Kasten suggests the JFrog Artifactory mirror for online installs, but it doesn’t integrate with the official offline script.

To solve this, I wrote a helper script that pulls from a non-gcr.io mirror and pushes to your private registry.

Official “air-gap” instructions for reference: https://docs.kasten.io/latest/install/offline.html#preparing-k10-container-images-for-air-gapped-use

Prerequisites

Run the script on Linux with:

• Network access to the source mirror (defaults to JFrog; customize inside the script if needed).
• Network access to your target private registry.
• jq installed (https://stedolan.github.io/jq/)
• docker installed (https://docs.docker.com/get-started/)

Usage

Download the script:

curl -O https://blog.backupnext.cloud/k10offline.sh

Review the contents to ensure they’re safe, then make it executable:

chmod +x k10offline.sh

Run it with:

./k10offline.sh <k10-version> <target-registry>

Example (K10 v4.0.3, pushing to private.target.repo/kasten):

./k10offline.sh 4.0.3 private.target.repo/kasten

The script pulls all required images and uploads them to your registry. When installing K10, point Helm to that repo:

helm install k10 k10-4.0.3.tgz \
  --namespace kasten-io \
  --set global.airgapped.repository=private.target.repo/kasten

Enjoy smoother offline installs!***