创建第一kubernetes应用以及基本操作（六）

1.创建一个测试用的deployment

kubectl run net-test --image=alpine --replicas= sleep 

2、查看获取IP情况

[root@linux ~]# kubectl get pod -o wide
NAME                                READY     STATUS    RESTARTS   AGE       IP           NODE
net-test-5767cb94df-8vvqv           /       Running             37m       10.2.43.2    192.168.56.12
net-test-5767cb94df-fzklz           /       Running             37m       10.2.43.4    192.168.56.12
net-test1-8557578bc-mdwpf           /       Running             36m       10.2.91.7    192.168.56.13
net-test1-8557578bc-p946b           /       Running             36m       10.2.91.6    192.168.56.13
nginx-65899c769f-27h4q              /       Running             37m       10.2.43.3    192.168.56.12
nginx-65899c769f-5449m              /       Running             37m       10.2.43.12   192.168.56.12
nginx-65899c769f-mkvpg              /       Running             37m       10.2.43.6    192.168.56.12
nginx-65899c769f-vl7nb              /       Running             37m       10.2.43.8    192.168.56.12
nginx-65899c769f-xg8d2              /       Running             37m       10.2.43.7    192.168.56.12
nginx-deployment-7498dc98f8-54hq2   /       Running             5m        10.2.91.9    192.168.56.13
nginx-deployment-7498dc98f8-msqmb   /       Running             6m        10.2.91.8    192.168.56.13
nginx-deployment-7498dc98f8-whwz6   /       Running             5m        10.2.91.10   192.168.56.13
nginx-test-6b8f899d7d-bntc8         /       Running             37m       10.2.43.11   192.168.56.12

3、查看deployment

[root@linux ~]# kubectl  get deployment
NAME               DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
net-test                                                    22d
net-test1                                                   37m
nginx                                                       41m
nginx-deployment                                            51m
nginx-test                                                  1d

4、查看deployment详情

kubectl  describe deployment  nginx

5、查看pod详情

kubectl  describe pod   pod名称
 
如：kubectl  describe pod nginx-test-6b8f899d7d-bntc8

6、跟新deployment版本

kubectl  set image deployment/nginx-deployment  nginx=nginx:1.12. --record
 
--record 表示记录日志，用于做回滚

以上每次执行后ip都会变化，在正常业务中是不满足我们的业务需求的，需要一个vip实现。这就用到service 的ip  也就是vip

7、编写一个service的yaml文件

vim  nginx-service.yaml
kind: Service
apiVersion: v1
metadata:
  name: nginx-service01
spec:
  selector:
    app: nginx
  ports:
  - protocol: TCP
    port:
    targetPort: 

8、创建service

kubectl  create -f nginx-service.yaml 

9、查看service

[root@linux ~]# kubectl  get service
NAME            TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)        AGE
kubernetes      ClusterIP   10.1.0.1      <none>        /TCP        23d
nginx-service   NodePort    10.1.232.55   <none>        :/TCP   1d

10、测试

[root@linux ~]# curl  --head http://10.1.232.55
HTTP/1.1  OK
Server: nginx/1.12.
Date: Fri,  Mar  :: GMT
Content-Type: text/html
Content-Length:
Last-Modified: Tue,  Jul  :: GMT
Connection: keep-alive
ETag: "5964d2ae-264"
Accept-Ranges: bytes

11、查看service vip代理的后端

[root@linux ~]# ipvsadm -Ln
IP Virtual Server version 1.2. (size=)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.56.12: rr persistent
  -> 10.2.91.8:                 Masq
  -> 10.2.91.9:                 Masq
  -> 10.2.91.10:                Masq
TCP  10.1.0.1: rr persistent
  -> 192.168.56.11:           Masq
TCP  10.1.189.235: rr
  -> 10.2.91.8:                 Masq
  -> 10.2.91.9:                 Masq
  -> 10.2.91.10:                Masq
TCP  10.1.232.55:80 rr persistent 10800
  -> 10.2.91.8:80                 Masq    1      0          0
  -> 10.2.91.9:80                 Masq    1      0          0
  -> 10.2.91.10:80                Masq    1      0          1
TCP  10.2.43.0: rr persistent
  -> 10.2.91.8:                 Masq
  -> 10.2.91.9:                 Masq
  -> 10.2.91.10:                Masq
TCP  10.2.43.1: rr persistent
  -> 10.2.91.8:                 Masq
  -> 10.2.91.9:                 Masq
  -> 10.2.91.10:                Masq
TCP  127.0.0.1: rr persistent
  -> 10.2.91.8:                 Masq
  -> 10.2.91.9:                 Masq
  -> 10.2.91.10:                Masq