五一电子网站建设,零基础学ps多久可以学会,哈尔滨站建筑面积,凡客诚品陈年文章目录 ingress环境准备准备service和pod验证效果 https 代理效果 ingress
在 Kubernetes 中#xff0c;Ingress 是一种 API 对象#xff0c;它管理外部访问集群内部服务的规则。你可以将其视为一个入口#xff0c;它可以将来自集群外部的 HTTP 和 HTTPS 路由到集群内部的… 文章目录 ingress环境准备准备service和pod验证效果 https 代理效果 ingress
在 Kubernetes 中Ingress 是一种 API 对象它管理外部访问集群内部服务的规则。你可以将其视为一个入口它可以将来自集群外部的 HTTP 和 HTTPS 路由到集群内部的服务。
实际上Ingress相当于一个7层的负载均衡器是kubernetes对反向代理的一个抽象它的工作原理类似于Nginx可以理解成在Ingress里建立诸多映射规则Ingress Controller通过监听这些配置规则并转化成Nginx的反向代理配置 , 然后对外部提供服务。在这里有两个核心概念用户编写Ingress规则说明哪个域名对应kubernetes集群中的哪个Service
Ingress控制器动态感知Ingress服务规则的变化然后生成一段对应的Nginx反向代理配置
Ingress控制器会将生成的Nginx配置写入到一个运行着的Nginx服务中并动态更新
到此为止其实真正在工作的就是一个Nginx了内部配置了用户定义的请求转发规则概念理解 环境准备
# 创建文件夹
[rootk8s-master01 ~]# mkdir ingress-controller
[rootk8s-master01 ~]# cd ingress-controller/# 获取ingress-nginx本次案例使用的是0.30版本
[rootk8s-master01 ingress-controller]# wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.30.0/deploy/static/mandatory.yaml
[rootk8s-master01 ingress-controller]# wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/nginx-0.30.0/deploy/static/provider/baremetal/service-nodeport.yaml# 修改mandatory.yaml文件中的仓库
# 修改quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0
# 为quay-mirror.qiniu.com/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0
# 创建ingress-nginx
[rootk8s-master01 ingress-controller]# kubectl apply -f ./# 查看ingress-nginx
[rootk8s-master01 ingress-controller]# kubectl get pod -n ingress-nginx
NAME READY STATUS RESTARTS AGE
pod/nginx-ingress-controller-fbf967dd5-4qpbp 1/1 Running 0 12h# 查看service
[rootk8s-master01 ingress-controller]# kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.98.75.163 none 80:32240/TCP,443:31335/TCP 11h
准备service和pod
tomcat-nginx.yaml apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-deploymentnamespace: dev
spec:replicas: 3selector:matchLabels:app: nginx-podtemplate:metadata:labels:app: nginx-podspec:containers:- name: nginximage: nginx:1.17.1ports:- containerPort: 80---apiVersion: apps/v1
kind: Deployment
metadata:name: tomcat-deploymentnamespace: dev
spec:replicas: 3selector:matchLabels:app: tomcat-podtemplate:metadata:labels:app: tomcat-podspec:containers:- name: tomcatimage: tomcat:8.5-jre10-slimports:- containerPort: 8080---apiVersion: v1
kind: Service
metadata:name: nginx-servicenamespace: dev
spec:selector:app: nginx-podclusterIP: Nonetype: ClusterIPports:- port: 80targetPort: 80---apiVersion: v1
kind: Service
metadata:name: tomcat-servicenamespace: dev
spec:selector:app: tomcat-podclusterIP: Nonetype: ClusterIPports:- port: 8080targetPort: 8080
# 创建
[rootk8s-master01 ~]# kubectl create -f tomcat-nginx.yaml# 查看
[rootk8s-master01 ~]# kubectl get svc -n dev
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
nginx-service ClusterIP None none 80/TCP 48s
tomcat-service ClusterIP None none 8080/TCP 48s
创建ingress-http.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:name: ingress-httpnamespace: dev
spec:rules:- host: nginx.itheima.comhttp:paths:- path: /backend:serviceName: nginx-serviceservicePort: 80- host: tomcat.itheima.comhttp:paths:- path: /backend:serviceName: tomcat-serviceservicePort: 8080# 创建
[rootk8s-master01 ~]# kubectl create -f ingress-http.yaml
ingress.extensions/ingress-http created# 查看
[rootk8s-master01 ~]# kubectl get ing ingress-http -n dev
NAME HOSTS ADDRESS PORTS AGE
ingress-http nginx.itheima.com,tomcat.itheima.com 80 22s# 查看详情
[rootk8s-master01 ~]# kubectl describe ing ingress-http -n dev
...
Rules:
Host Path Backends
---- ---- --------
nginx.itheima.com / nginx-service:80 (10.244.1.96:80,10.244.1.97:80,10.244.2.112:80)
tomcat.itheima.com / tomcat-service:8080(10.244.1.94:8080,10.244.1.95:8080,10.244.2.111:8080)
...# 接下来,在本地电脑上配置host文件,解析上面的两个域名到192.168.109.100(master)上
# 然后,就可以分别访问tomcat.itheima.com:32240 和 nginx.itheima.com:32240 查看效果了
验证效果 https 代理
创建证书
# 生成证书
openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj /CCN/STBJ/LBJ/Onginx/CNitheima.com# 创建密钥
kubectl create secret tls tls-secret --key tls.key --cert tls.crt
创建ingress-https.yaml apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:name: ingress-httpsnamespace: dev
spec:tls:- hosts:- nginx.itheima.com- tomcat.itheima.comsecretName: tls-secret # 指定秘钥rules:- host: nginx.itheima.comhttp:paths:- pathType: Prefixpath: /backend:service:name: nginx-serviceport:number: 80- host: tomcat.itheima.comhttp:paths:- pathType: Prefixpath: /backend:service:name: tomcat-serviceport:number: 8080
# 创建
[rootk8s-master01 ~]# kubectl create -f ingress-https.yaml
ingress.extensions/ingress-https created# 查看
[rootk8s-master01 ~]# kubectl get ing ingress-https -n dev
NAME HOSTS ADDRESS PORTS AGE
ingress-https nginx.itheima.com,tomcat.itheima.com 10.104.184.38 80, 443 2m42s# 查看详情
[rootk8s-master01 ~]# kubectl describe ing ingress-https -n dev
...
TLS:tls-secret terminates nginx.itheima.com,tomcat.itheima.com
Rules:
Host Path Backends
---- ---- --------
nginx.itheima.com / nginx-service:80 (10.244.1.97:80,10.244.1.98:80,10.244.2.119:80)
tomcat.itheima.com / tomcat-service:8080(10.244.1.99:8080,10.244.2.117:8080,10.244.2.120:8080)
...# 下面可以通过浏览器访问https://nginx.itheima.com:31335 和 https://tomcat.itheima.com:31335来查看了
效果
查看映射到公网端口
[rootkubeadm-master1 ingress]# kubectl get svc -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx NodePort 10.200.234.128 none 80:31929/TCP,443:32744/TCP 69m参考文档: https://znunwm.top/archives/121212#7.4-ingress%E4%BB%8B%E7%BB%8D
