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README.md

Istio CNI Helm Chart

This chart installs the Istio CNI Plugin. See the CNI installation guide for more information.

Setup Repo Info

helm repo add istio https://istio-release.storage.googleapis.com/charts
helm repo update

See helm repo for command documentation.

Installing the Chart

To install the chart with the release name istio-cni:

helm install istio-cni istio/cni -n kube-system

Installation in kube-system is recommended to ensure the system-node-critical priorityClassName can be used. You can install in other namespace only on K8S clusters that allow 'system-node-critical' outside of kube-system.

Configuration

To view support configuration options and documentation, run:

helm show values istio/istio-cni

Profiles

Istio Helm charts have a concept of a profile, which is a bundled collection of value presets. These can be set with --set profile=<profile>. For example, the demo profile offers a preset configuration to try out Istio in a test environment, with additional features enabled and lowered resource requirements.

For consistency, the same profiles are used across each chart, even if they do not impact a given chart.

Explicitly set values have highest priority, then profile settings, then chart defaults.

As an implementation detail of profiles, the default values for the chart are all nested under defaults. When configuring the chart, you should not include this. That is, --set some.field=true should be passed, not --set defaults.some.field=true.

Ambient

To enable ambient, you can use the ambient profile: --set profile=ambient.

Calico

For Calico, you must also modify the settings to allow source spoofing:

if deployed by operator, kubectl patch felixconfigurations default --type='json' -p='[{"op": "add", "path": "/spec/workloadSourceSpoofing", "value": "Any"}]'
if deployed by manifest, add env FELIX_WORKLOADSOURCESPOOFING with value Any in spec.template.spec.containers.env for daemonset calico-node. (This will allow PODs with specified annotation to skip the rpf check. )

GKE notes

On GKE, 'kube-system' is required.

If using helm template, --set cni.cniBinDir=/home/kubernetes/bin is required - with helm install it is auto-detected.