We are trying to use Kubernetes to deploy our application, currently, we have +30 microservices and we have a files mess.

we tried Kustomization to add a patch and create ConfigMaps depending on the overlay, and also merge some files. But we always need to create a lot of files, 1 for each deployment/service. And at the end when we want to update something, for example, replicas, is a bit painful.

---
apiVersion: v1
kind: Service
metadata:
  name: service1
spec:
  ports:
  - port: 3000
  selector:
    app: service1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: service1
spec:
  selector:
    matchLabels:
      app: service1
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: service1
    spec:
      containers:
      - image: pyfarm-registry.local:5000/pyfarm/svclocation:dev
        name: service1
        envFrom:
        - configMapRef:
            name: configName
        ports:
        - containerPort: 3000
      imagePullSecrets:
      - name: local-registry

We have this file duplicated by +30 times, changing names, and env variables. But I am sure has to have something to parse these templates.

We already tried to implement Helm, but is not what we are finding.

Can we do for example 1 file with variables and generate the other 30 files, also we need different namespaces. Is it possible?

The only solution we found is using bash, but there are something more elegant?