AzureRetirement

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.

Retires 30 Sep 2027In about 11 months, 30 Sep 2027

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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)

Check your estate for this

What to do

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.
Use the Microsoft migration guidance from Open Service Mesh (OSM) configurations to Istio.

Replacement

Istio add-on for Azure Kubernetes Service (AKS)

Sources

Official sourceazure.microsoft.comOfficial
Additional sourceazure.microsoft.comOfficial

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

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Nov 2026 The vendor gives a month, not a day.Due this month, Nov 2026Azure Kubernetes Service: Kubernetes 1.34 end of life Source
Nov 2026 The vendor gives a month, not a day.Due this month, Nov 2026Azure Kubernetes Service: managed NGINX ingress (Application Routing) retirement Source
10 Dec 2026Due in 27 days, 10 Dec 2026Azure Kubernetes Service: Azure Linux with OS Guard retirement Source
Mar 2027 The vendor gives a month, not a day.In about 4 months, Mar 2027Azure Kubernetes Service: Kubernetes 1.32 LTS end of life Source

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Last checked 12 Nov 2026 · Added 13 Nov 2026 · Changelog for this item