Source: thenewstack.io

Upgrading Istio without Downtime

Category: Kubernetes, Infrastructure

If you have been working with Istio for some time and have it deployed to your environments, you might be running a significantly older version.

This means that your older versions are no longer receiving critical patches and updates that help keep you secure. Solo.io does support older versions of Istio via Gloo Mesh and its long-term support (LTS) for current release and the previous four releases.

This means that if you are still on Istio 1.6, they recommend that you upgrade three times to get to 1.10 (1.6→1.7→1.8→1.10).

Due to this type of outage, it is recommended for istio-agents to match and retain the same version as the control plane (Istiod).

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