Extend helm upgrade cmd to add some field values - nginx

Question

I'm installing ingress nginx using a modified yaml file
kubectl apply -f deploy.yaml
The yaml file is just the original deploy file but with added hostPorts for the deployment:
ports:
- name: http
containerPort: 80
protocol: TCP
- name: https
containerPort: 443
protocol: TCP
- name: webhook
containerPort: 8443
protocol: TCP
become:
ports:
- name: http
containerPort: 80
protocol: TCP
hostPort: 80 #<-- added
- name: https
containerPort: 443
protocol: TCP
hostPort: 443 #<-- added
- name: webhook
containerPort: 8443
protocol: TCP
hostPort: 8443 #<-- added
So this is working for me. But I would like to install ingress nginx using helm:
helm upgrade --install ingress-nginx ingress-nginx \
--repo https://kubernetes.github.io/ingress-nginx \
--namespace ingress-nginx --create-namespace
Is it possible to add the hostPort values using helm (-f values.yml)? I need to add hostPort in Deployment.spec.template.containers.ports, but I have two problems to write the correct values.yml file:
values.yml
# How to access the deployment?
spec:
template:
containers:
ports: # How to add field with existing containerPort value of each element in the array?

Answer 1

Two ways to find out:
You can take a closer look at the helm chart itself https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx
Here you can find deployment spec https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx/templates/controller-deployment.yaml
And under it, you can see, there's condition that enables hostPort https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx/templates/controller-deployment.yaml#L113
(Proper one) Always dig through values.yaml https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx/values.yaml#L90
and chart documentation https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx/README.md#:~:text=controller.hostPort.enabled

Answer 2

First of all, you already have hostPort in values.yaml. See following fragment:
## Use host ports 80 and 443
## Disabled by default
hostPort:
# -- Enable 'hostPort' or not
enabled: false
ports:
# -- 'hostPort' http port
http: 80
# -- 'hostPort' https port
https: 443
You should turn it on in values.yaml:
## Use host ports 80 and 443
## Disabled by default
hostPort:
# -- Enable 'hostPort' or not
enabled: true
After all - as you know - you can install your ingress via helm.
helm install -f values.yaml
About webhook - see here.
You can find hostPort also in deployment file. Here is one of the templates (controller-deployment.yaml):
In this file you can find three appearances of hostPort (value controller.hostPort.enabled - responsible for enabling or disabling the hostPort).
Here:
{{- if $.Values.controller.hostPort.enabled }}
hostPort: {{ index $.Values.controller.hostPort.ports $key | default $value }}
{{- end }}
and here:
{{- range $key, $value := .Values.tcp }}
- name: {{ $key }}-tcp
containerPort: {{ $key }}
protocol: TCP
{{- if $.Values.controller.hostPort.enabled }}
hostPort: {{ $key }}
{{- end }}
{{- end }}
{{- range $key, $value := .Values.udp }}
- name: {{ $key }}-udp
containerPort: {{ $key }}
protocol: UDP
{{- if $.Values.controller.hostPort.enabled }}
hostPort: {{ $key }}
{{- end }}
{{- end }}
See also:
ingress-nginx Documentation on Github
nginx Documentation
NGINX - Helm Charts
Helm Documentation