```plain
unable to locate an Envoy binary
```

This is documented in this [PR](https://github.com/istio/istio/issues/13677). Once the Envoy binary is available for the Mac,
these tests will hopefully succeed.

* If one uses Docker for Mac for the kubernetes environment be sure to specify the `-istio.test.kube.loadbalancer=false` parameter. This solves an error like:

```plain
service ingress is not available yet

# Open Telemetry Tracing

This sample demonstrates the support for the OpenTelemetry tracing provider with the Telemetry API.

## Start otel-collector service

First, deploy the `otel-collector` backend with simple configuration.

```bash
kubectl -n <namespace> apply -f ../otel.yaml
```

In this example, we use `observability` as the namespace to deploy the `otel-collector` backend:

```bash
kubectl create namespace observability

# Telemetry Addons

This directory contains sample deployments of various addons that integrate with Istio. While these applications
are not a part of Istio, they are essential to making the most of Istio's observability features.

The deployments here are meant to quickly get up and running, and are optimized for this case. As a result,
they may not be suitable for production. See below for more info on integrating a production grade version of each
addon.

# Helloworld service

This sample includes two versions of a simple helloworld service that returns its version
and instance (hostname) when called.
It can be used as a test service when experimenting with version routing.

This service is also used to demonstrate canary deployments working in conjunction with autoscaling.
See [Canary deployments using Istio](https://istio.io/blog/2017/0.1-canary).

## Start the helloworld service

# Grafana Dashboards

This folder contains Istio's official Grafana dashboards.
These get publish to [Grafana](https://grafana.com/orgs/istio/dashboards) during release, and are bundled into our
[Grafana sample](../../../samples/addons/grafana.yaml).

## Jsonnet

Newer dashboards are generated with [Jsonnet](https://jsonnet.org/) with the [Grafonnet](https://grafana.github.io/grafonnet/index.html).

# Istio Release Notes

This directory contains the release notes, upgrade notes, and security notes for Istio.
Notes should be created as part of the pull request for any user facing changes. Before
a release, the release notes utility will be run in order to generate a release notes file
which will be reviewed by the release managers and documentation team.

## When to Add Release Notes

Release notes should be added for any user facing changes. These include:

# Tornado - Demo Websockets App

This is a sample application that demonstrates the use of an upgraded websockets connection on an ingress traffic when using Istio `VirtualService`.
The `app.yaml` creates a Kubernetes `Service` and a `Deployment` that is based on an existing Docker image for [Hiroakis's Tornado Websocket Example](https://github.com/hiroakis/tornado-websocket-example).