How to reconfigure some Istio componnents?

Config
1

Hello!
I installed Istio on Kubernets with helm install command and my custom values.yaml.
Now I want to change some parameters of ingress gateway only.
How can I reconfigure ingress only (for example add externalIP and increase replica count)?

2

@Timofey
Your custom values.yaml can have the following to override the defaults only for istio-ingressgateway:

gateways:
  istio-ingressgateway:
    ...
    autoscaleMax: 10
    autoscaleMin: 2
    ...
    externalIPs:
      - 1.1.1.1
      - 2.2.2.2
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3

@anilcs0405, do I upgrade or delete+install with helm?
And can I update only one chart for ingress?

4

@Timofey
You do not need to update any helm charts, the charts that come with istio support overriding the above parameters that you need to on only istio-ingressgateway.

The part I am not clear about is, why would you install the default istio-ingressgateway and then upgrade it?, why not override the values in values.yaml and then generate the ingressgateway with helm and install that?

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5

I want to update some ingress property. But I don’t understand step after I change values in ingress directory. What commands should I use to change ingress configuration?

6

You can find the steps here

Basically, you update values.yaml, then generate config using helm and then use kubectl apply to deploy istio.

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