Announcing Istio 1.4

Istio 1.4 release announcement.

Nov 14, 2019

We are pleased to announce the release of Istio 1.4!


Get a detailed list of what's changed.


Things to know and prepare before upgrading.


Download and install this release.


Visit the documentation for this release.

Istio 1.4 continues our efforts at improving the Istio user experience, with a focus on simplification. We’ve also continued to add features that improve the performance and experience of running Istio.

Mixer-less telemetry

Our implementation of telemetry without Mixer will simplify installation and operation of meshes, all while vastly improving performance. The in-proxy generation of HTTP metrics has graduated from experimental to alpha. Users are very excited about this improvement and we are working hard to get it ready. We’ve also added new experimental features that don’t require Mixer: TCP metrics and Stackdriver metrics.

Authorization policy model in beta

The authorization policy model is now in Beta with the introduction of the v1beta1 authorization policy that focuses on simplification and flexibility. This will also replace the old v1alpha1 RBAC policy.

Automatic mutual TLS

We added automatic mutual TLS support. It allows you to adopt mutual TLS without needing to configure destination rules. Istio automatically programs client sidecar proxies to send mutual TLS to server endpoints that are able to accept mutual TLS.

Currently this feature must be explicitly enabled, but we plan to enable it by default in a future release.

Improved troubleshooting

We’re introducing the istioctl analyze command to improve troubleshooting of your mesh. Check for problems with configuration in your mesh, and even validate new configuration prior to submitting it to the mesh.

Better sidecar

We’ve been doing tons of work to improve Envoy, its feature set, and the experience of using it. Envoy now exits more gracefully on crashes, supports more metrics, and can mirror traffic to a percentage of traffic. It reports the direction of traffic and has better configuration of stat patterns. Finally, there is a new experimental command that can tell you when configuration has been pushed to all proxies in the mesh.

Other enhancements

As always, there is a lot happening in the Community Meeting; join us every other Thursday at 10 AM Pacific.

We were very proud to be called out as one of the top five fastest growing open source projects in all of GitHub. Want to get involved? Join one of our Working Groups and help us make Istio even better.

To join the conversation, go to, log in with your GitHub credentials and join us!

See also