Resource Quota

 apiVersion: v1

kind: Pod

metadata:

  name: quota

  labels:

      app: myapp

      type: frontend

spec:

 containers:

    - name: pod-quota

      image: nginx

      resources:

        requests:

          memory: 200Mi

          cpu: 100m

Deployment & Rollout Kubernetes

 vi moon.yml 

________________________________

apiVersion: apps/v1

kind: Deployment

metadata:

  name: nginx-deployment

  labels:

    app: nginx

spec:

  replicas: 4

  minReadySeconds: 30

  strategy:

    rollingUpdate:

      maxSurge: 3

      maxUnavailable: 0

    type: RollingUpdate

  selector:

    matchLabels:

      app: nginx

  template:

    metadata:

      labels: 

        app: nginx

    spec:

      containers:

      - name: nginx

        image: nginx:1.14.2

        ports:

        - containerPort: 80

kubectl apply -f moon.yml 

__________________________((((((((((((((((((((((((((((())))))))))))))))))____________________

change version of nginx

apiVersion: apps/v1

kind: Deployment

metadata:

  name: nginx-deployment

  labels:

    app: nginx

spec:

  replicas: 4

  minReadySeconds: 30

  strategy:

    rollingUpdate:

      maxSurge: 3

      maxUnavailable: 0

    type: RollingUpdate

  selector:

    matchLabels:

      app: nginx

  template:

    metadata:

      labels: 

        app: nginx

    spec:

      containers:

      - name: nginx

        image: nginx:1.14.3

        ports:

        - containerPort: 80

kubectl apply -f moon.yml  --record=true 

kubectl explain deployment nginx-deployment

kubectl rollout history deploy nginx-deployment

output :

deployment.apps/nginx-deployment 

REVISION  CHANGE-CAUSE

2         kubectl apply --filename=dep.yml --record=true

3         kubectl apply --filename=dep.yml --record=true

how to do the rollback

kubectl rollout history <name of deployment> --revision =2

kubectl rollout undo <name of deployment> --revision =2

ReplicaSet Kubernetes

vi moon.yml

______________________________________________________

 apiVersion: apps/v1

kind: ReplicaSet

metadata:

  name: abid-moon

  labels:

    app: guestbook

    tier: frontend

spec:

  # modify replicas according to your case

  replicas: 3

  selector:

    matchLabels:

      tier: frontend

  template:

    metadata:

      labels:

        tier: frontend

    spec:

      containers:

      - name: moon-solutions

        image: nginx

++++++++++++++++++++++++++++++++++++++++++++++++++

apiVersion: v1

kind: Pod

metadata:

  name: pod2

  labels:

    app: guestbook

spec:

  containers:

     - name: podngin

       image: nginx

~                        

++++++++++++++++++++++++++++++++

execute file:     kubectl apply -f  moon.yml
_________________________________________________________

delete RS: kubectl delete rs abid-moon

+++++++++++++++++++++++++++++++

apiVersion: v1

kind: Pod

metadata:

  name: pod2

  labels:

    tier:  frontend

spec:

  containers:

     - name: podngin

       image: nginx

+++++++++++++++++++++++++++++++++++

~                        

ReplicationController Kubernetes

 

vi moon.yml

***************************************************

apiVersion: v1

kind: ReplicationController

metadata:

  name: nginx

spec:

  replicas: 7

  selector:

    type: nginx

  template:

    metadata:

      name: nginx

      labels:

        type: nginx

    spec:

      containers:

      - name: nginx

        image: nginx

*************************************************************

create service 

vi service123.yml

*********************************

apiVersion: v1

kind: Service

metadata:

 name: mysvc

spec:

 type: NodePort

 ports:

  - targetPort: 80

    port: 1234

    nodePort: 30008

 selector:

  type: nginx

********************************************************

check service 

*******************

kubectl describe svc mysvc 

**************************

check endpoints also 

kubectl get pods -o wide

******************************

DELETE POD

kubectl delete pod <podname>

*********************************************

REMOVE LABEL 

*****************************

kubectl label pod <podename> type-

*******************************************************

I want to delete ReplicationController but not pods 

kubectl delete rc --cascade=false podname

***************************************************