k8s demo

cassandra-statefulset.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: cassandra
spec:
  serviceName: "cassandra"
  replicas: 3
  selector:
    matchLabels:
      app: cassandra
  template:
    metadata:
      labels:
        app: cassandra
    spec:
      containers:
      - name: cassandra
        image: cassandra:latest
        ports:
        - containerPort: 9042
        resources:
          requests:
            memory: "512Mi"
            cpu: "250m"
        volumeMounts:
        - name: cassandra-data
          mountPath: /var/lib/cassandra
  volumeClaimTemplates:
  - metadata:
      name: cassandra-data
    spec:
      accessModes: ["ReadWriteOnce"]
      resources:
        requests:
          storage: 1Gi

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: my-configmap
  namespace: my-namespace
data:
  key1: value1
  key2: value2

db-secret.yaml

apiVersion: v1
kind: Secret
metadata:
  name: db-password
type: Opaque
data:
  password: BASE64_ENCODED_PASSWORD

job.yml

apiVersion: batch/v1
kind: Job
metadata:
  name: example-job
spec:
  template:
    metadata:
      name: example-pod
    spec:
      containers:
      - name: example-container
        image: example-image
        command: ["echo", "Hello, Kubernetes!"]
      restartPolicy: Never
  backoffLimit: 4

mysql-statefulset.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: mysql
spec:
  serviceName: "mysql"
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:latest
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "yourpassword"
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
  volumeClaimTemplates:
  - metadata:
      name: mysql-persistent-storage
    spec:
      accessModes: ["ReadWriteOnce"]
      resources:
        requests:
          storage: 1Gi

nginx.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80

pod.yml

apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod
  labels:
    app: nginx
    environment: production
spec:
  containers:
  - name: nginx-container
    image: nginx:latest
    ports:
    - containerPort: 80

pvc.yml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: example-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

react-app.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-react-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-react-app
  template:
    metadata:
      labels:
        app: my-react-app
    spec:
      containers:
      - name: my-react-app
        image: my-registry/my-react-app:latest
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: my-react-app
spec:
  selector:
    app: my-react-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

redis-statefulset.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: redis
spec:
  serviceName: "redis"
  replicas: 1
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      containers:
      - name: redis
        image: redis:latest
        ports:
        - containerPort: 6379
        volumeMounts:
        - name: redis-data
          mountPath: /data
  volumeClaimTemplates:
  - metadata:
      name: redis-data
    spec:
      accessModes: ["ReadWriteOnce"]
      resources:
        requests:
          storage: 1Gi

service.yml

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: my-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP