Kubernetes Ingress/nginx pod specific value - nginx

Question

I'm very new to Kubernetes and still learning how to use LB, ingress, etc. Currently, I'm trying to set pod-specific value(config) for each host. Looks like in ingress yaml spec, it can read config from values. But I would like to read ingress spec, e.g. host, in Values.yaml.
For example, I have two hosts
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: service
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: service-A.com
http:
paths:
- path: /
backend:
serviceName: myservicea
servicePort: 80
- host: service-B.com
http:
paths:
- path: /
backend:
serviceName: myserviceb
servicePort: 80
And I have two variables in values.yaml:
var1: aaa
var2: bbb
I want to pass
var1 to service-A.com/myservicea
var2 to service-B.com/myserviceb
or pass both, but the application must be able to identify what host it is, then it can use the right variable.
Is there any configuration/apis available to use for this purpose?

Answer 1

This is how you can create a secret.
kubectl create secret generic CUSTOM_VAR\
--from-literal=VAR_A=aaa\
--from-literal=VAR_B=bbb
This is how you can access the secrets in you deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: myservicea-depl
spec:
replicas: 1
selector:
matchLabels:
app: myservice
template:
metadata:
labels:
app: myservice
spec:
containers:
- name: myservice
image: user/myservicea
env:
- name: VAR_A
value: aaa // this way you directly pass values here
- name: VAR_A // this way you can store this as secret in k8s
valueFrom:
secretKeyRef:
name: CUSTOM_VAR
key: VAR_A