kubefy

Convert Dockerfiles to Kubernetes manifests

Installation

git clone https://github.com/vyagh/kubefy
cd kubefy
make build

Usage

# Basic usage
kubefy Dockerfile --name myapp

# With options
kubefy Dockerfile --name myapp --namespace production --replicas 3

# Preview without writing files
kubefy Dockerfile --name myapp --dry-run

# Different service type
kubefy Dockerfile --name myapp --service-type LoadBalancer

Example

Given this Dockerfile:

FROM node:18-alpine
WORKDIR /app
ENV NODE_ENV=production
EXPOSE 3000
CMD ["npm", "start"]

Running kubefy Dockerfile --name myapp generates:

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
  namespace: default
  labels:
    app: myapp
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
        - name: myapp
          image: node:18-alpine
          ports:
            - containerPort: 3000
          env:
            - name: NODE_ENV
              value: production
          args:
            - npm
            - start
          workingDir: /app

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: myapp
  namespace: default
spec:
  selector:
    app: myapp
  ports:
    - port: 3000
      targetPort: 3000
  type: ClusterIP

Supported Directives

Directive	Support
FROM	Image and tag extraction
EXPOSE	Single and multiple ports
ENV	KEY=value format
CMD	JSON and shell formats
ENTRYPOINT	JSON and shell formats
WORKDIR	Working directory

Flags

Flag	Short	Default	Description
--name	-n	(required)	Application name
--namespace		default	Kubernetes namespace
--replicas	-r	1	Number of replicas
--output	-o	.	Output directory
--service-type		ClusterIP	Service type
--dry-run		false	Preview without writing

Limitations

• Multi-stage builds not supported
• ARG substitution not supported
• No Ingress generation

License

MIT