K8s之traefik(ingess)发布服务-实战-创新互联

K8s之traefik(ingess)发布服务实战

成都创新互联公司服务项目包括前郭网站建设、前郭网站制作、前郭网页制作以及前郭网络营销策划等。多年来,我们专注于互联网行业,利用自身积累的技术优势、行业经验、深度合作伙伴关系等,向广大中小型企业、政府机构等提供互联网行业的解决方案,前郭网站推广取得了明显的社会效益与经济效益。目前,我们服务的客户以成都为中心已经辐射到前郭省份的部分城市,未来相信会继续扩大服务区域并继续获得客户的支持与信任!

上篇描述了基于k8s集群安装部署traefik作为ingress服务,简单演示了一下发布服务,本篇将细节讲述如果结合traefik发布业务服务。

安装部署参考:

https://blog.51cto.com/michaelkang/2429929

版本介绍

traefik:v1.7
k8s:v1.15.1

快速部署traefik

如果你的k8s集群已经部署完成,想快速部署traefik,执行命令如下:

kubectl create -f https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-rbac.yaml
kubectl create -f https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-ds.yaml

执行成功,在浏览器数据一个node节点的IP地址:8080 端口即可看到traefik的管理页面。

实战开始

编写一个业务yaml文件

如果对yaml不太熟悉,看这边:https://blog.51cto.com/michaelkang/2429745

---
#配置deployment
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
#设置dm名称
  name: dm-pttest
#添加标签 pttest
  labels:
    app: pttest
spec:
# 通过replicas声明pod个数是2 
  replicas: 2
# 通过标签选择被控制的pod  
  selector:
    matchLabels:
      app: pttest
# 在template中定义pod 
  template:
    metadata:
# 给pod打上标签app=pttest
      labels:
        app: pttest
    spec:
      containers:
# 声明容器名称,注意不是pod名称,pod名称应该定义在metadata中
      - name: myapp
        image: ikubernetes/myapp:v1
        ports:
        - containerPort: 80

---
#服务配置
apiVersion: v1
# 声明一个Service资源对象
kind: Service
metadata:
#pod 名称
  name: svcpttest
  labels:
    app: pttest
  annotations:
#检查后端服务返回错误率,大于%50,踢出集群
    traefik.backend.circuitbreaker: "NetworkErrorRatio() > 0.5"
spec:
  ports:
  - name: http
    port: 80
  selector:
    app: pttest

---
#配置ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: myapp-traefik-ingress
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: pttest.pt.com
    http:
      paths:
      - path: /
#指定后端服务
        backend:
          serviceName: svcpttest
          servicePort: 80

验证服务

#查看服务
[root@kubm-02 traefik]# kubectl get svc -o wide
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE     SELECTOR

svcpttest    ClusterIP   10.245.148.114           80/TCP    2m12s   app=pttest  <==lable

#查看container
[root@kubm-02 traefik]# kubectl get pods  -o wide
NAME                         READY   STATUS    RESTARTS   AGE     IP             NODE         NOMINATED NODE   READINESS GATES
dm-pttest-6f6cd797f5-cdjk5   1/1     Running   0          63s     10.244.3.115   kubnode-01              
dm-pttest-6f6cd797f5-tqh64   1/1     Running   0          63s     10.244.4.135   kubnode-02              

#ingress 信息
[root@kubm-02 traefik]# kubectl get ingress                                
NAME                    HOSTS           ADDRESS   PORTS   AGE
myapp-traefik-ingress   pttest.pt.com             80      23s

#deployment
[root@kubm-02 traefik]# kubectl get deploy
NAME        READY   UP-TO-DATE   AVAILABLE   AGE

dm-pttest   2/2     2            2           12m

验证访问:

请求pttest.pt.com, 服务svcpttest会把请求负载给后端的pod。

#请求两次分别返回两个
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-cdjk5

[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-tqh64

扩容节点

kubectl edit deployment dm-pttest

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
  creationTimestamp: "2019-08-16T10:13:49Z"
  generation: 1
  labels:
    app: pttest
  name: dm-pttest
  namespace: default
  resourceVersion: "3871589"
  selfLink: /apis/extensions/v1beta1/namespaces/default/deployments/dm-pttest
  uid: 153a60fb-66df-4884-aa9a-49ac47cebd2c
spec:
  progressDeadlineSeconds: 2147483647
  replicas: 5                             《=====pod数量,有默认2个,调整到5个

保存退出,k8s集群会自动执行;

验证

kubectl get pods

[root@kubm-02 traefik]# kubectl get pods
NAME                         READY   STATUS    RESTARTS   AGE
dm-pttest-6f6cd797f5-cdjk5   1/1     Running   0          17m
dm-pttest-6f6cd797f5-qd4cl   1/1     Running   0          99s
dm-pttest-6f6cd797f5-r25dc   1/1     Running   0          99s
dm-pttest-6f6cd797f5-tbfmh   1/1     Running   0          99s
dm-pttest-6f6cd797f5-tqh64   1/1     Running   0          17m

#请求
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-r25dc
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-tbfmh
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-tqh64
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-cdjk5
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-qd4cl
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-r25dc
[root@kubm-02 traefik]# curl -H "HOST:pttest.pt.com" http://172.20.101.166/hostname.html
dm-pttest-6f6cd797f5-tbfmh

使用命令调整pod数量

调整pod数量为1;
kubectl scale deployment dm-pttest --replicas=1

调整pod数量为2;
kubectl scale deployment dm-pttest --replicas=2

参考文档

https://kubernetes.io/zh/docs/concepts/services-networking/connect-applications-service/
https://blog.csdn.net/u010606397/article/details/90752262

另外有需要云服务器可以了解下创新互联cdcxhl.cn,海内外云服务器15元起步,三天无理由+7*72小时售后在线,公司持有idc许可证,提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案,具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势,专为企业上云打造定制,能够满足用户丰富、多元化的应用场景需求。


文章标题:K8s之traefik(ingess)发布服务-实战-创新互联
网站链接:http://hbruida.cn/article/dcidgp.html