Kubernetes YAML Doctor

Lint Kubernetes manifests and visualize the resource graph without touching a cluster.

Manifest Input

YAML or JSON, multi-doc supported

apiVersion: v1
kind: ConfigMap
metadata:
  name: app-config
data:
  LOG_LEVEL: info
---
apiVersion: v1
kind: Secret
metadata:
  name: app-secret
type: Opaque
data:
  token: ZHVtbXk=
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
  labels:
    app: web
spec:
  replicas: 2
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      serviceAccountName: web-sa
      containers:
        - name: web
          image: nginx:latest
          envFrom:
            - configMapRef:
                name: app-config
          env:
            - name: SECRET_TOKEN
              valueFrom:
                secretKeyRef:
                  name: app-secret
                  key: token
          volumeMounts:
            - name: config
              mountPath: /etc/config
      volumes:
        - name: config
          configMap:
            name: app-config
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: web-sa
---
apiVersion: v1
kind: Service
metadata:
  name: web-svc
spec:
  selector:
    app: web
  ports:
    - port: 80
      targetPort: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: web-ingress
spec:
  rules:
    - http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: web-svc
                port:
                  number: 80

About This Tool

The YAML Doctor checks for missing core fields, warns about dangling references, and builds a visual graph of how Services, Ingresses, and workloads connect.