Version 1.26.1 or higher is recommended for compatibility. Step-by-Step: Adding the Repository
Contains the Custom Resource Definitions (CRDs) and cluster-wide resources. istio/istiod download istio helm charts
(Optional) Used for environments requiring the Istio CNI plugin. Advanced: Downloading Charts for Offline (Air-Gapped) Use Version 1
Version 3.6 or above is required, though Helm 4 is also supported for the latest releases. download istio helm charts
Istio 1.29+ is tested with Kubernetes versions 1.31 through 1.35.
In restricted environments where the cluster cannot reach the internet, you can download the charts as compressed archives to a local machine first. Istio / Installation Guides