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Kubernetes

Lab4 Deployment & DaemonSet Solution

Deployment

Créer un deploiement nommé web (avec 4 replicas) basé sur l’image httpd

Terminal window
vi deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: app3-web
spec:
  replicas: 4
  selector:
    matchLabels:
      app3: web
  template:
    metadata:
      labels:
        app3: web
    spec:
      containers:
      - name: nginx
        image: nginx:1.17-alpine

Créer un service nommé web de type NodePort rassemblant les pods du deploiment web sur le nodePort 30001

Terminal window
vi service.yml
apiVersion: v1
kind: Service
metadata:
  name: web
spec:
  selector:
    app3: web
  type: NodePort
  ports:
    - port: 80
      targetPort: 80
      nodePort: 30001

Appliquer les spécifications

Terminal window
kubectl apply -f .

Visualiser le résultat

Terminal window
kubectl get deploy,rs,pods,svc -o wide
NAME                  READY   UP-TO-DATE   AVAILABLE   AGE     CONTAINERS   IMAGES             SELECTOR
deployment.apps/web   4/4     4            4           5m20s   apache       httpd:2.4-alpine   app3=web


NAME                             DESIRED   CURRENT   READY   AGE     CONTAINERS   IMAGES             SELECTOR
replicaset.apps/web-66bcf7cf77   4         4         4       5m20s   apache       httpd:2.4-alpine   app3=web,pod-template-hash=66bcf7cf77


NAME                       READY   STATUS        RESTARTS   AGE     IP              NODE     NOMINATED NODE   READINESS GATES
pod/app3-ds-7ldcc          1/1     Terminating   0          3m25s   192.168.0.145   host13   <none>           <none>
pod/app3-ds-vkt88          1/1     Terminating   0          3m25s   192.168.0.72    host12   <none>           <none>
pod/web-66bcf7cf77-2q644   1/1     Running       0          5m20s   192.168.0.143   host13   <none>           <none>
pod/web-66bcf7cf77-bnchn   1/1     Running       0          5m20s   192.168.0.144   host13   <none>           <none>
pod/web-66bcf7cf77-kmmfk   1/1     Running       0          5m20s   192.168.0.71    host12   <none>           <none>
pod/web-66bcf7cf77-pwnnq   1/1     Running       0          5m20s   192.168.0.70    host12   <none>           <none>


NAME                 TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE     SELECTOR
service/web          NodePort    10.97.155.18   <none>        80:30001/TCP   5m20s   app3=web

DaemonSet

Créer un DaemonSet nommé debug basé sur l’image alpine

Terminal window
vi daemonset.yml
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: app3-ds
spec:
  selector:
    matchLabels:
      app3: daemon
  template:
    metadata:
      labels:
        app3: daemon
    spec:
      containers:
      - name: daemon
        image: alpine:3.12
        command: ["sleep","3600"]

Appliquer la spécification

kubectl apply -f daemonset.yml

Visualiser le résultat

Terminal window
kubectl get ds,pods -o wide
NAME                     DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE   CONTAINERS   IMAGES        SELECTOR
daemonset.apps/app3-ds   2         2         2       2            2           <none>          47s   daemon       alpine:3.12   app3=daemon


NAME                READY   STATUS    RESTARTS   AGE   IP              NODE     NOMINATED NODE   READINESS GATES
pod/app3-ds-l6gcv   1/1     Running   0          47s   192.168.0.146   host13   <none>           <none>
pod/app3-ds-tr6z2   1/1     Running   0          47s   192.168.0.73    host12   <none>           <none>