---
slug: "azure-aks-open-service-mesh-add-on-retirement"
title: "Azure Kubernetes Service: Open Service Mesh add-on retirement"
summary: "Retirement date for the Open Service Mesh add-on for Azure Kubernetes Service (AKS): 30 Sep 2027. Security patch updates end on that date. The add-on receives no new minor versions or features."
cloud: "azure"
service: "Azure Kubernetes Service"
service_slug: "aks"
category: "feature"
type: "retirement"
announced_date: "2024-09-26"
effective_date: "2027-09-30"
effective_precision: "day"
replacement: "Istio add-on for Azure Kubernetes Service (AKS)"
affected_versions: []
source_url: "https://azure.microsoft.com/updates?id=open-service-mesh-add-on-for-aks-will-be-retired-on-september-30-2027"
extra_source_urls: ["https://azure.microsoft.com/en-us/updates/ga-istiobased-service-mesh-addon-for-azure-kubernetes-service/"]
vendor_ref: "open-service-mesh-add-on-for-aks-will-be-retired-on-september-30-2027"
last_checked_at: "2026-11-12T09:55:19.345Z"
created_at: "2026-11-13T13:36:44.208Z"
updated_at: "2026-11-13T13:36:44.208Z"
url: "https://eolwatch.dev/items/azure-aks-open-service-mesh-add-on-retirement"
short_url: "https://eolwatch.dev/i/7t"
markdown_url: "https://eolwatch.dev/items/azure-aks-open-service-mesh-add-on-retirement.md"
json_url: "https://eolwatch.dev/items/azure-aks-open-service-mesh-add-on-retirement.json"
source_note: null
---

# Azure Kubernetes Service: Open Service Mesh add-on retirement

Retirement date for the Open Service Mesh add-on for Azure Kubernetes Service (AKS): 30 Sep 2027. Security patch updates end on that date. The add-on receives no new minor versions or features.

- Effective date: 30 Sep 2027
- Cloud: [Azure](https://eolwatch.dev/cloud/azure.md)
- Service: [Azure Kubernetes Service](https://eolwatch.dev/services/azure/aks.md)
- Type: Retirement
- Category: [Feature](https://eolwatch.dev/categories/features.md)
- Replacement: Istio add-on for Azure Kubernetes Service (AKS)
- Announced: 26 Sep 2024
- Official source: [azure.microsoft.com](https://azure.microsoft.com/updates?id=open-service-mesh-add-on-for-aks-will-be-retired-on-september-30-2027)
- Last checked: 12 Nov 2026

## What breaks

The Open Service Mesh add-on for AKS is retired on 30 Sep 2027, following the upstream archival of the open-source Open Service Mesh project. The add-on no longer receives new minor version releases or new features. Security patch updates end on the retirement date. Microsoft states that the existing add-on can continue to be used until the retirement date, and that there are no changes in pricing between the Open Service Mesh add-on and the Istio add-on.

## Who is affected

### Matching resource types

- `azurerm_kubernetes_cluster`

### Fields the check reads

- `open_service_mesh_enabled`

### Detected by the estate check from

- Terraform state or plan (JSON)

## What to do

1. Continue to use the existing Open Service Mesh add-on until the retirement date, or transition to the Istio add-on for Azure Kubernetes Service (AKS) before that time.
2. Use the Microsoft [migration guidance from Open Service Mesh (OSM) configurations to Istio](https://go.microsoft.com/fwlink/?linkid=2286684).

## Replacement

Istio add-on for Azure Kubernetes Service (AKS)

## Sources

- [Official source](https://azure.microsoft.com/updates?id=open-service-mesh-add-on-for-aks-will-be-retired-on-september-30-2027) (azure.microsoft.com, Official)
- [Additional source](https://azure.microsoft.com/en-us/updates/ga-istiobased-service-mesh-addon-for-azure-kubernetes-service/) (azure.microsoft.com, Official)

Last checked against the first source in this list on 12 Nov 2026.

Page: https://eolwatch.dev/items/azure-aks-open-service-mesh-add-on-retirement | JSON: https://eolwatch.dev/items/azure-aks-open-service-mesh-add-on-retirement.json

The text on this page is drafted with AI assistance from the vendor's text, checked against the official source and approved by a person before it is published.