Leo Zhang
我是一块砖,哪里需要哪里搬!

一、概述

Ingress-nginx:它是由Kubernetes社区基于Nginx Web服务器开发的,并补充了一组用于实现额外功能的Lua插件,作为“官方”默认控制器支持当然最优。

Github:https://github.com/kubernetes/ingress-nginx

说明文档:https://kubernetes.github.io/ingress-nginx/deploy/

 

Nginx-ingress:这是Nginx官方社区开发产品,Nginx ingress具有很高的稳定性,持续的向后兼容性,没有任何第三方模块,并且由于消除了Lua代码而保证了较高的速度。

Github:https://github.com/nginxinc/kubernetes-ingress

说明文档:https://docs.nginx.com/nginx-ingress-controller/installation/installation-with-manifests/

 

差异对比:

 更多详情:https://github.com/nginxinc/kubernetes-ingress/blob/master/docs/nginx-ingress-controllers.md

 


二、自定义配置

Ingress-nginx:

apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    helm.sh/chart: ingress-nginx-2.13.0
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/version: 0.35.0
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/component: controller
  name: ingress-nginx-controller
  namespace: ingress-nginx
data:
  proxy-connect-timeout: 5
  proxy-read-timeout: 60
  client-body-buffer-size: "8k"
  worker-processes: "4"
  max-worker-connections: 16384

更多公共配置参考:https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/

特定Ingress配置:https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/

 

Nginx-ingress:

apiVersion: v1
metadata:
  name: nginx-config
  namespace: nginx-ingress
data:
  proxy-connect-timeout: "60s"
  proxy-read-timeout: "60s"
  client-max-body-size: "80m"
  worker-processes: "4"
  worker-connections: "10240"
  external-status-address: "10.88.88.108"

常用配置说明:

  proxy-connect-timeout: 定义与代理服务器建立连接的超时,默认60s。请注意,此超时通常不能超过75秒。
proxy-read-timeout: 定义用于从代理服务器读取响应的超时,默认60s。超时仅在两次连续的读取操作之间设置,而不用于传输整个响应。
               如果代理服务器在此时间内未传输任何内容,则连接将关闭。
client-max-body-size: 设置客户端请求正文的最大允许大小,默认1m,在“ Content-Length”请求标头字段中指定。
                如果请求中的大小超过配置的值,则会向客户端返回413(请求实体太大)错误
                  请注意,浏览器无法正确显示此错误。设置size为0将禁用客户端请求主体大小的检查。
worker-processes: 定义工作进程数。最佳值取决于许多因素,包括(但不限于)CPU内核数,存储数据的硬盘驱动器数以及加载模式。

             如有疑问,将其设置为可用的CPU内核数将是一个不错的开始(默认值“auto”将尝试自动检测)。

  worker-connections: 设置工作进程可以打开的最大同时连接数,默认1024。
               应当记住,该数目包括所有连接(例如,与代理服务器的连接等),而不仅包括与客户端的连接。
                另一个需要考虑的因素是,并发连接的实际数量不能超过打开文件最大数量的当前限制,可以通过worker_rlimit_nofile进行更改 。

  external-status-address: 设置要在Ingress资源状态下负载的地址,需要-report-status命令行参数,并且将覆盖-external-service参数。

更多公共配置参考:https://docs.nginx.com/nginx-ingress-controller/configuration/global-configuration/configmap-resource/

特定Ingress配置:https://docs.nginx.com/nginx-ingress-controller/configuration/ingress-resources/advanced-configuration-with-annotations/

 


三、资源定义

1) 同一域名,不同URL被转发不同服务

Ingress-nginx:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ymtapi
  namespace: ymt
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: k8s.ymtapi.org
    http:
      paths:
      - path: /wxapi
        backend:
          serviceName: apprestserver
          servicePort: 8114
      - path: /api
        backend:
          serviceName: appsocialmanservice
          servicePort: 8113

 

Nginx-ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ymtapi
  namespace: ymt
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: k8s.ymtapi.org
    http:
      paths:
      - path: /wxapi
        backend:
          serviceName: apprestserver
          servicePort: 8114
      - path: /api
        backend:
          serviceName: appsocialmanservice
          servicePort: 8113

 

 

2) 不同域名被转发不同服务

Ingress-nginx:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: prometheus
  namespace: monitoring
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: k8s.grafana.com
    http:
      paths:
      - path: /
        backend:
          serviceName: grafana
          servicePort: 3000
          
  - host: k8s.prometheus.com
    http:
      paths:
      - path: /
        backend:
          serviceName: prometheus-k8s
          servicePort: 9090
          
  - host: k8s.alertmanager.com
    http:
      paths:
      - path: /
        backend:
          serviceName: alertmanager-main
          servicePort: 9093

 

Nginx-ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: prometheus
  namespace: monitoring
spec:
  rules:
  - host: k8s.grafana.com
    http:
      paths:
      - path: /
        backend:
          serviceName: grafana
          servicePort: 3000
          
  - host: k8s.prometheus.com
    http:
      paths:
      - path: /
        backend:
          serviceName: prometheus-k8s
          servicePort: 9090
          
  - host: k8s.alertmanager.com
    http:
      paths:
      - path: /
        backend:
          serviceName: alertmanager-main
          servicePort: 9093

 

3)不使用域名的转发

Ingress-nginx:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ymtapi
  namespace: ymt
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - http:
      paths:
      - path: /WxTransWeb
        backend:
          serviceName: wxtransweb
          servicePort: 8080

 

Nginx-ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ymtapi
  namespace: ymt
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.org/server-snippets: "server_name ~^.*$;"
spec:
  rules:
  - host: k8s.ymtapi.org
    http:
      paths:
      - path: /WxTransWeb
        backend:
          serviceName: wxtransweb
          servicePort: 8080

注意:Nginx-ingress要求host必须存在,也就是必须使用域名,如果想直接使用IP访问,则只能通过设置"server_name ~^.*$;"实现,即同时支持域名和IP访问,但是仅能设置一个Ingress。

Github issue:https://github.com/nginxinc/kubernetes-ingress/issues/209#issuecomment-581691384

 

4)基于TLS的安全设置

Ingress-nginx:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: dashboard
  namespace: kubernetes-dashboard
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
  tls:
  - hosts: 
    - k8s.dashboard.com
    secretName: tls-secret
  rules:
  - host: k8s.dashboard.com
    http:
      paths:
      - path: /
        backend:
          serviceName: kubernetes-dashboard
          servicePort: 443

 

Nginx-ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: dashboard
  namespace: kubernetes-dashboard
  annotations:
    nginx.org/redirect-to-https: "true"
    ingress.kubernetes.io/ssl-redirect: "true"
    nginx.org/ssl-services: "kubernetes-dashboard"
spec:
  tls:
  - hosts: 
    - k8s.dashboard.com
    secretName: tls-secret
  rules:
  - host: k8s.dashboard.com
    http:
      paths:
      - path: /
        backend:
          serviceName: kubernetes-dashboard
          servicePort: 443

 

 

作者:Leozhanggg

出处:https://www.cnblogs.com/leozhanggg/p/13603215.html

本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

posted on 2020-09-03 09:45  LeoZhanggg  阅读(4277)  评论(1编辑  收藏  举报