kubernates-traning-01

kubectl expose deployment test --port=80
  113  kubectl get service
  114  kubectl describe service test
  115  kubectl get pods -o wide
  116  kubectl edit deployments
  117  kubectl get pods -o wide
  118  kubectl describe service test
  119  kubectl get pods -o wide
  120  kubectl describe service test
  121  kubectl get pods -o wide
  122  curl 10.107.215.185

kubectl expose deployment test --port=8000 --target-port=80

 cat myhttpd.yml 
    2  kubectl create -f myhttpd.yml 
    3  kubectl get pods 
    4  kubectl get pods -w
    5  kubectl get pods --show-labels
    6  cat srv.yml 
    7  kubectl create -f srv.yml 
    8  kubectl get service
    9  kubectl describe serivce httpd-service
   10  kubectl describe service httpd-service
   11  kubectl get pods -o wide
   12  vi myhttpd.yml 
   13  kubectl create -f myhttpd.yml 
   14  kubectl get pods -o wide
   15  kubectl get pods -o wide -w
   16  kubectl describe service httpd-service
   17  vi myhttpd.yml 
   18  cat srv.yml
-----
[root@master ~]# cat myhttpd.yml 
apiVersion: v1
kind: Pod
metadata:
  name: httpd1
  labels:
    env: myhttpd
spec:
  containers:
  - name: httpd1
    image: httpd:latest
    ports:
    - containerPort: 80

---------------
apiVersion: v1
kind: Service
metadata:
  name: httpd-service
  labels:
    env: myhttpd-srv
spec:
  ports:
  - port: 80
    targetPort: 80
  type: NodePort
  selector:
    env: myhttpd
--------------------




        
        
  

kubectl get pods -l 'env:httpd
kubectl get pods -l 'env in (myhttpd)'
kubectl get pods -l 'env in (myhttpd, myhttpdnew)'
kubectl label --help

kubectl create secret generic mysecret --from-literl='database-pass'='redhat'
kubectl get secrets

https://raw.githubusercontent.com/kubernetes/website/master/content/en/examples/pods/config/redis-config

apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:

• name: redis
  image: kubernetes/redis:v1
  env:
  • name: MASTER
    value: "true"
    ports:
  • containerPort: 6379
    resources:
    limits:
    cpu: "0.1"
    volumeMounts:
  • mountPath: /redis-master-data
    name: data
  • mountPath: /redis-master
    name: config
    volumes:
  • name: data
    emptyDir: {}
  • name: config
    configMap:
    name: example-redis-config
    items:
    • key: redis-config
      path: redis.conf

kubectl create configmap example-redis-config --from-file=redis-config

66 kubectl get configmap
67 kubectl edit configmap example-redis-config
68 kubectl get configmap example-redis-config -o yaml
69 vi redis.yml
70 kubectl create -f redis.yml
71 vi redis.yml
72 kubectl create -f redis.yml
73 kubectl get pods
74 kubectl get pods -w
75 kubectl get pods
76 kubectl exec -it redis bash
77 kubectl exec -it redis redis-cli

On Node

mkdir /data
43 chown nfsnobody:nfsnobody /data/
44 chmod 775 /data/
45 vi /etc/exports
46 exportfs -r
47 systemctl stop firewalld
49 systemctl disable firewalld
50 systemctl restart nfs-server
51 systemctl enable nfs-server

cat /etc/exports
/data/ *(rw,async,no_root_squash)

---

on master

mount -t nfs node.example.com:/data /mnt
umount /mnt

cat pv.yml
apiVersion: v1
kind: PersistentVolume
metadata:
name: mypv1
spec:
capacity:
storage: 1Gi
accessModes:
- ReadWriteMany
nfs:
server: node.example.com
path: "/data"
[root@master ~]# cat mypvc.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: mypvc1
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 1Gi