Centos7部署kubernetes测试k8s应用(九)

1、创建一个deployment

[root@linux-node1 ~]# kubectl run net-test --image=alpine --replicas=2 sleep 360000

deployment.apps "net-test" created

2、查看获取IP情况

[root@linux-node1 ~]# kubectl get pod -o wide

NAME READY STATUS RESTARTS AGE IP NODE

net-test-5767cb94df-5h8b6 1/1 Running 0 3m 10.2.79.2 192.168.43.23

net-test-5767cb94df-n5mcr 1/1 Running 0 3m 10.2.74.2 192.168.43.22

3、测试连通性

ping 10.2.79.2

 4、测试nginx

[root@linux-node1 ~]# vim nginx-deployment.yaml

apiVersion: apps/v1

kind: Deployment

metadata:

name: nginx-deployment

labels:

app: nginx

spec:

replicas: 3

selector:

matchLabels:

app: nginx

template:

metadata:

labels:

app: nginx

spec:

containers:

- name: nginx

image: nginx:1.10.3

ports:

- containerPort: 80

 

5、创建nginx-deploymen

[root@linux-node1 ~]# kubectl create -f nginx-deployment.yaml

deployment.apps "nginx-deployment" created

6、查看deploymen

[root@linux-node1 ~]# kubectl get deployment

7、查看deploymen详细信息

[root@linux-node1 ~]# kubectl describe deployment

8、查看单个副本的详细信息

[root@linux-node1 ~]# kubectl describe pod nginx-deployment-75d56bb955-4vsns

9、查看pod

[root@linux-node1 ~]# kubectl get pod -o wide

NAME READY STATUS RESTARTS AGE IP NODE

net-test-5767cb94df-5h8b6 1/1 Running 0 11m 10.2.79.2 192.168.43.23

net-test-5767cb94df-n5mcr 1/1 Running 0 11m 10.2.74.2 192.168.43.22

nginx-deployment-75d56bb955-4vsns 1/1 Running 0 4m 10.2.74.3 192.168.43.22

nginx-deployment-75d56bb955-l97zv 1/1 Running 0 4m 10.2.79.3 192.168.43.23

nginx-deployment-75d56bb955-wlfp2 1/1 Running 0 4m 10.2.79.4 192.168.43.23

10、测试pod访问

[root@linux-node1 ~]# curl --head http://10.2.74.3

11、更新deployment

[root@linux-node1 ~]# kubectl set image deployment/nginx-deployment nginx=nginx:1.12.2 --record

deployment.apps "nginx-deployment" image updated

12、查看更新后的deployment

[root@linux-node1 ~]# kubectl get deployment -o wide

13、回滚到上一个版本

[root@linux-node1 ~]# kubectl rollout undo deployment/nginx-deployment

14、创建service

[root@linux-node1 ~]# vim nginx-service.yaml

kind: Service

apiVersion: v1

metadata:

name: nginx-service

spec:

selector:

app: nginx

ports:

- protocol: TCP

port: 80

targetPort: 80

[root@linux-node1 ~]# kubectl create -f nginx-service.yaml

service "nginx-service" created

15、可以看到已经实现了负载均衡

[root@linux-node2 ssl]# ipvsadm -LN

-LN: unknown option

[root@linux-node2 ssl]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.0.1:443 rr persistent 10800

-> 192.168.43.21:6443 Masq 1 0 0

TCP 10.1.185.150:80 rr

-> 10.2.74.3:80 Masq 1 0 0

-> 10.2.74.5:80 Masq 1 0 0

-> 10.2.79.3:80 Masq 1 0 0