kubernotes.txt

o get k8s cluster status

# kubectl --kubeconfig ./kubeconfig cluster-info

Kubernetes master is running at https://10.68.68.108:443
Elasticsearch is running at https://10.68.68.108:443/api/v1/namespaces/kube-system/services/elasticsearch-logging/proxy
Kibana is running at https://10.68.68.108:443/api/v1/namespaces/kube-system/services/kibana-logging/proxy
KubeDNS is running at https://10.68.68.108:443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

# kubectl --kubeconfig ./kubeconfig get services --namespace kube-system
NAME                    TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
elasticsearch-logging   ClusterIP   10.32.0.183   <none>        9200/TCP         12h
kibana-logging          NodePort    10.32.0.221   <none>        5601:31412/TCP   12h
kube-dns                ClusterIP   10.32.0.10    <none>        53/UDP,53/TCP    12h


SOCK SHOP DEMO

o deploy sock-shop

kubectl --kubeconfig ./kubeconfig create namespace sock-shop
kubectl --kubeconfig ./kubeconfig apply -f /root/microservices-demo/deploy/kubernetes/complete-demo.yaml
kubectl --kubeconfig ./kubeconfig get svc front-end -n sock-shop -o wide

o delete sockshop

kubectl --kubeconfig ./kubeconfig delete -f /root/microservices-demo/deploy/kubernetes/complete-demo.yaml

o get deployment status

kubectl --kubeconfig ./kubeconfig get svc -n sock-shop

o expose via nodeport

kubectl --kubeconfig ./kubeconfig expose deployment front-end --name=nodeport --port=80 --target-port=30001 --type=NodePort -n sock-shop


then get master ip and use port from : kubectl --kubeconfig ./kubeconfig get svc front-end -n sock-shop -o wide

http://10.68.68.108:30001/


PVC DEMO

o create  PVCs

 kubectl --kubeconfig ./kubeconfig create -f wp-pvcs.yaml
persistentvolumeclaim "mysql-pv-claim" created
persistentvolumeclaim "wp-pv-claim" created

 kubectl --kubeconfig ./kubeconfig get pvc
NAME             STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
mysql-pv-claim   Bound     pvc-20012951-6a32-11e8-a843-506b8d18ab34   20Gi       RWO            acs-test       5m
wp-pv-claim      Bound     pvc-200262a5-6a32-11e8-a843-506b8d18ab34   20Gi       RWO            acs-test       5m

o setup mysql and WP

create secret

kubectl --kubeconfig ./kubeconfig create secret generic mysql-pass --from-literal=password=nutanix/4u

kubectl --kubeconfig ./kubeconfig get secrets
NAME                  TYPE                                  DATA      AGE
default-token-xrcmm   kubernetes.io/service-account-token   3         13h
mysql-pass            Opaque                                1         3m


kubectl --kubeconfig ./kubeconfig create -f wp-mysql.yaml
service "wordpress-mysql" created
deployment "wordpress-mysql" created

kubectl --kubeconfig ./kubeconfig create -f wp-web.yaml
service "wordpress" created
deployment "wordpress" created

 kubectl --kubeconfig ./kubeconfig get svc
NAME              TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
kubernetes        ClusterIP   10.32.0.1    <none>        443/TCP        13h
wordpress         NodePort    10.32.0.64   <none>        80:30000/TCP   3m
wordpress-mysql   ClusterIP   None         <none>        3306/TCP       3m
[root@cos7-dbhost01 ~]# kubectl --kubeconfig ./kubeconfig get pods
NAME                               READY     STATUS    RESTARTS   AGE
wordpress-77d578745-fh45t          1/1       Running   0          3m
wordpress-mysql-58cf8dc9f9-vqq9s   1/1       Running   0          3m

o nodeport redirect

 kubectl --kubeconfig ./kubeconfig expose deployment wordpress --name=nodeport --port=80 --target-port=30000 --type=NodePort
service "nodeport" exposed

its running on worker2

kubectl --kubeconfig ./kubeconfig get pods -o wide
NAME                               READY     STATUS    RESTARTS   AGE       IP            NODE
wordpress-77d578745-fh45t          1/1       Running   0          8m        10.200.3.26   k8stest-cb1fbb-k8s-worker-2
wordpress-mysql-58cf8dc9f9-vqq9s   1/1       Running   0          8m        10.200.1.10   k8stest-cb1fbb-k8s-worker-0

http://<worker 2 ip >:30000

o delete everything ...

kubectl --kubeconfig ./kubeconfig delete secret mysql-pass
secret "mysql-pass" deleted

kubectl --kubeconfig ./kubeconfig delete pvc -l app=wordpress
persistentvolumeclaim "mysql-pv-claim" deleted
persistentvolumeclaim "wp-pv-claim" deleted

kubectl --kubeconfig ./kubeconfig delete service -l app=wordpress
service "nodeport" deleted
service "wordpress" deleted
service "wordpress-mysql" deleted

kubectl --kubeconfig ./kubeconfig delete deployment -l app=wordpress
deployment "wordpress" deleted
deployment "wordpress-mysql" deleted

wp-mysql.yaml

apiVersion: v1
kind: Secret
metadata:
  name: mysql-pass
data:
  password: TG9uZG9uMSE=
---
apiVersion: v1
kind: Service
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mysql
  clusterIP: None
---
apiVersion: extensions/v1beta1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-pass
              key: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

wp-pvcs.yaml

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
  storageClassName: acs-test
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: wp-pv-claim
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
  storageClassName: acs-test

wp-web.yaml

apiVersion: v1
kind: Service
metadata:
  name: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 80
      nodePort: 30000
  selector:
    app: wordpress
    tier: frontend
  type: NodePort
---
apiVersion: extensions/v1beta1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: frontend
    spec:
      containers:
      - image: wordpress:4.8-apache
        name: wordpress
        env:
        - name: WORDPRESS_DB_HOST
          value: wordpress-mysql
        - name: WORDPRESS_DB_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-pass
              key: password
        ports:
        - containerPort: 80
          name: wordpress
        volumeMounts:
        - name: wordpress-persistent-storage
          mountPath: /var/www/html
      volumes:
      - name: wordpress-persistent-storage
        persistentVolumeClaim:
          claimName: wp-pv-claim

wps-mysql.yaml

apiVersion: v1
kind: Secret
metadata:
  name: mysql-pass
data:
  password: TG9uZG9uMSE=
---
apiVersion: v1
kind: Service
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mysql
  clusterIP: None
---
apiVersion: extensions/v1beta1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-pass
              key: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim