# 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

  // To allocate 256 IPs, set this field to 8 (a /24 mask for IPv4 or a /120 for IPv6).
  // Minimum value is 4 (16 IPs).
  // This field is immutable.
  // +required
  optional int32 perNodeHostBits = 2;

  // ipv4 defines an IPv4 IP block in CIDR notation(e.g. "10.0.0.0/8").
  // At least one of ipv4 and ipv6 must be specified.
  // This field is immutable.
  // +optional
  optional string ipv4 = 3;

# 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).

/*
Copyright The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
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You may obtain a copy of the License at

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# WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY
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# If you're looking at this file in a different repo and want to make a change, please go to the
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# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");

MIT License

Copyright (c) 2020 Alec Holmes

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in all copies or...

The MIT License (MIT)

Copyright (c) 2016 Evan Huus
Copyright (c) 2023 Klaus Post

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Copyright (c) 2021 - 2023 Thomas Pelletier

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Copyright (c) 2014 Stretchr, Inc.
Copyright (c) 2017-2018 objx contributors

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