Nginx 入口重写目标断开与 .NET Core API 的链接 [英] Nginx ingress rewrite target breaks link to .NET Core API

问题描述

我有一个包含多个服务的设置，并通过 Ingress/Terraform/Kubernetes 设置运行.目前，我所有的 Vue.JS 应用程序都通过 NGINX 提供服务，但是当我添加以下行 "nginx.ingress.kubernetes.io/rewrite-target":"/$1" 以确保我的其他路由工作，例如/frontend 和/backend 它破坏了我的 API，我无法再通过 /api/

访问它

地形设置:

资源kubernetes_ingress"入口"{元数据{名称 = 入口"命名空间 = var.namespace_name注释 = {nginx.ingress.kubernetes.io/force-ssl-redirect"= 真nginx.ingress.kubernetes.io/from-to-www-redirect"= 真nginx.ingress.kubernetes.io/ssl-redirect":truenginx.ingress.kubernetes.io/add-base-url":falsenginx.ingress.kubernetes.io/rewrite-target":/$1"kubernetes.io/ingress.class":nginx"ncp/use-regex":真}}规格{tls {hosts = [var.domain_name, "*.${var.domain_name}"]secret_name = "tls-secret";}规则 {主机 = var.domain_namehttp {小路 {路径 = "/(.*)";后端{service_name =前端"；服务端口 = 80}}小路 {path = "/api(.*)";后端{service_name = "api";服务端口 = 80}}小路 {path = "/backend(.*)";后端{service_name =后端"；服务端口 = 80}}小路 {path = "/payment(.*)";后端{service_name =支付"；服务端口 = 80}}}}}wait_for_load_balancer = 真}

我的Startup.cs 配置

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env){如果 (env.IsDevelopment()){app.UseDeveloperExceptionPage();}//启用中间件以将生成的 Swagger 作为 JSON 端点提供服务.app.UseSwagger();//启用中间件来服务 swagger-ui(HTML、JS、CSS 等)，//指定 Swagger JSON 端点.app.UseSwaggerUI(c =>{c.SwaggerEndpoint("/swagger/v1/swagger.json", "OLC API V1");});app.UseCors(AllowSpecificOrigins);app.UseRouting();app.UseEndpoints(endpoints =>{端点.MapControllers();});}

terraform 设置似乎适用于我所有的 vue.js 容器.唯一的问题是 API 不再可用.甚至不是通过/api/api，例如在这个问题

我尝试仅重写特定路线并更改应用程序，以便在不同的路线上提供服务，但我仍然收到 404 错误.即使在创建响应 / 路由的控制器时.删除重写目标行时，API 确实有效.但是 Vue.JS 容器没有

解决方案

事实证明，这只是一个正则表达式问题，我没有正确设置路径.我更改了以下内容.

 路径 {path = "/api(.*)";后端{service_name = "api";服务端口 = 80}}

进入

 路径 {路径 = "/(api.*)";后端{service_name = "olc-api";服务端口 = 80}}

通过它，它将/api 与我的 .NET 核心应用程序匹配，而不是尝试在 vue.js 容器中查找 URL

I've got a setup with multiple services and are run via an Ingress / Terraform / Kubernetes setup. Currently, all my Vue.JS applications are served via NGINX however when I added the following line "nginx.ingress.kubernetes.io/rewrite-target": "/$1" to make sure my other routes work such as /frontend and /backend it broke my API and I can no longer access it via /api/

Terraform setup:

resource "kubernetes_ingress" "ingress" {
metadata {
name      = "ingress"
namespace = var.namespace_name
annotations = {
  "nginx.ingress.kubernetes.io/force-ssl-redirect" = true
  "nginx.ingress.kubernetes.io/from-to-www-redirect" = true
  "nginx.ingress.kubernetes.io/ssl-redirect": true
  "nginx.ingress.kubernetes.io/add-base-url": false
  "nginx.ingress.kubernetes.io/rewrite-target": "/$1"
  "kubernetes.io/ingress.class": "nginx"
  "ncp/use-regex": true
}
}

spec {
tls {
  hosts = [var.domain_name, "*.${var.domain_name}"]
  secret_name = "tls-secret"
}
rule {
  host = var.domain_name
  http {
    path {
      path = "/(.*)"
      backend {
        service_name = "frontend"
        service_port = 80
      }
    }

    path {
      path = "/api(.*)"
      backend {
        service_name = "api"
        service_port = 80
      }
    }

    path {
      path = "/backend(.*)"
      backend {
        service_name = "backend"
        service_port = 80
      }
    }

    path {
      path = "/payment(.*)"
      backend {
        service_name = "payment"
        service_port = 80
      }
    }

  }
 }
}

wait_for_load_balancer = true
}

My Startup.cs config

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        // Enable middleware to serve generated Swagger as a JSON endpoint.
        app.UseSwagger();

        // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.),
        // specifying the Swagger JSON endpoint.
        app.UseSwaggerUI(c =>
        {
            c.SwaggerEndpoint("/swagger/v1/swagger.json", "OLC API V1");
        });

        app.UseCors(AllowSpecificOrigins);

        app.UseRouting();


        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }

The terraform setup seems to work for all my vue.js containers. Only problem is that API is no longer accessible. Not even via /api/api such as in this question

I've tried to rewrite only specific routes and change the app so that'd serve on a different route but I still get a 404 error. Even when creating a controller that responds to the / route. When removing the rewrite target line the API does work. But the Vue.JS containers do not

解决方案

It turns out that, this is simply a regex issue and me not setting paths correctly. I changed the following.

 path {
  path = "/api(.*)"
  backend {
    service_name = "api"
    service_port = 80
  }
}

Into

     path {
      path = "/(api.*)"
      backend {
        service_name = "olc-api"
        service_port = 80
      }
    }

With this it matches the /api to my .NET core app, instead of it trying to find a URL within the vue.js container(s)

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