[Istio](https://istio.io/) is an open platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data.
## Introduction
This chart bootstraps Istio's [CRDs](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/#customresourcedefinitions)
which are an internal implementation detail of Istio. CRDs define data structures for storing runtime configuration
specified by a human operator.
This chart must be run to completion prior to running other Istio charts, or other Istio charts will fail to initialize.
## Prerequisites
- Kubernetes 1.9 or newer cluster with RBAC (Role-Based Access Control) enabled is required
- Helm 2.7.2 or newer or alternately the ability to modify RBAC rules is also required
## Resources Required
The chart deploys pods that consume minimal resources.
## Installing the Chart
1. If a service account has not already been installed for Tiller, install one:
> Although you can install the `istio-init` chart to any namespace, it is recommended to install `istio-init` in the same namespace(`istio-system`) as other Istio charts.
## Configuration
The Helm chart ships with reasonable defaults. There may be circumstances in which defaults require overrides.
To override Helm values, use `--set key=value` argument during the `helm install` command. Multiple `--set` operations may be used in the same Helm operation.
Helm charts expose configuration options which are currently in alpha. The currently exposed options are explained in the following table:
| Parameter | Description | Values | Default |
| --- | --- | --- | --- |
| `global.hub` | Specifies the HUB for most images used by Istio | registry/namespace | `docker.io/istio` |
| `global.tag` | Specifies the TAG for most images used by Istio | valid image tag | `0.8.latest` |
CreationTimestamp is a timestamp representing the server time when this object was created. It is not guaranteed to be set in happens-before order across separate operations. Clients may not set this value. It is represented in RFC3339 form and is in UTC.
Populated by the system. Read-only. Null for lists. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
CreationTimestamp is a timestamp representing the server time when this object was created. It is not guaranteed to be set in happens-before order across separate operations. Clients may not set this value. It is represented in RFC3339 form and is in UTC.
Populated by the system. Read-only. Null for lists. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
name: Age
type: date
group:certmanager.k8s.io
version:v1alpha1
names:
kind:Order
plural:orders
scope:Namespaced
---
apiVersion:apiextensions.k8s.io/v1beta1
kind:CustomResourceDefinition
metadata:
name:challenges.certmanager.k8s.io
labels:
app:certmanager
chart:certmanager
heritage:Tiller
release:istio
annotations:
"helm.sh/resource-policy":keep
spec:
additionalPrinterColumns:
-JSONPath:.status.state
name:State
type:string
-JSONPath:.spec.dnsName
name:Domain
type:string
-JSONPath:.status.reason
name:Reason
type:string
-JSONPath:.metadata.creationTimestamp
description:|-
CreationTimestamp is a timestamp representing the server time when this object was created. It is not guaranteed to be set in happens-before order across separate operations. Clients may not set this value. It is represented in RFC3339 form and is in UTC.
Populated by the system. Read-only. Null for lists. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
