没有 Docker 的 Traefik v2 反向代理

Question

我有一个非常简单的 Golang 微服务（没有 Docker，只是简单的二进制文件），它 returns GET 请求上的简单消息。

curl -XGET 'http://localhost:36001/api/operability/list'

{"message": "ping 123"}

现在想通过Traefik-v2做反向代理，所以做了配置文件"traefik.toml":

[global]
  checkNewVersion = false
  sendAnonymousUsage = false

[entryPoints]
    [entryPoints.web]
    address = ":8090"

    [entryPoints.traefik]
    address = ":8091"

[log]
    level = "DEBUG"
    filePath = "logs/traefik.log"
[accessLog]
    filePath = "logs/access.log"

[api]
    insecure = true
    dashboard = true

[providers]
  [providers.file]
    filename = "traefik.toml"

# dynamic conf
[http]
    [http.routers]
        [http.routers.my-router]
            rule = "Path(`/proxy`)"
            service = "my-service"
            entryPoints = ["web"]
    [http.services]
        [http.services.my-service.loadBalancer]
            [[http.services.my-service.loadBalancer.servers]]
                url = "http://localhost:36001"

启动 Traefik（我正在使用二进制分发）：

traefik --configFile=traefik.toml

现在端口 8091 上的仪表板非常有用，但我很难处理反向代理请求。我想它应该是这样的（基于我的配置文件）：

curl -XGET 'http://localhost:8090/proxy/api/operability/list'

但我得到的只是：

404 page not found

问题是：是配置文件有误还是只是请求错字？

编辑： 我的配置文件基于以下问题的答案：

Simple reverse proxy example with Traefik

编辑#2： Traefik 版本信息：

traefik version
Version:      2.4.9
Codename:     livarot
Go version:   go1.16.5
Built:        2021-06-21T16:17:58Z
OS/Arch:      windows/amd64

Answer 1

我找到了答案。

如果我决定让 Traefik 使用 /proxy 并简单地将所有请求重定向到 /api/，那我就没那么聪明了*。官方文档 (https://doc.traefik.io/traefik/routing/routers/) 说（我在引用）：

Use Path if your service listens on the exact path only. For instance, Path: /products would match /products but not /products/shoes.

Use a Prefix matcher if your service listens on a particular base path but also serves requests on sub-paths. For instance, PathPrefix: /products would match /products but also /products/shoes and /products/shirts. Since the path is forwarded as-is, your service is expected to listen on /products.

我没有使用任何中间件来替换路径的子字符串

现在举例回答。

首先：main.go 文件中的微服务代码

package main

import (
    "fmt"
    "log"
    "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "{\"message\": \"ping 123\"}")
}

func main() {
    http.HandleFunc("/operability/list", handler)
    log.Fatal(http.ListenAndServe(":36001", nil))
}

现在，config.tom 文件中的 Traefik v2 配置文件：

[global]
  checkNewVersion = false
  sendAnonymousUsage = false

[entryPoints]
    [entryPoints.web]
    address = ":36000"

    [entryPoints.traefik]
    address = ":8091"

[log]
    level = "DEBUG"
    filePath = "logs/traefik.log"
[accessLog]
    filePath = "logs/access.log"

[api]
    insecure = true
    dashboard = true

[providers]
  [providers.file]
    debugLogGeneratedTemplate = true
    # Point this same file for dynamic configuration
    filename = "config.toml"
    watch = true

[http]
    [http.middlewares]
        [http.middlewares.test-replacepathregex.replacePathRegex]
            # We need middleware to replace all "/proxy/" with "/api/"
            regex = "(?:^|\W)proxy(?:$|\W)"
            replacement = "/api/"

    [http.routers]
        [http.routers.my-router]
            # We need to handle all request with pathes defined as "/proxy/*"
            rule = "PathPrefix(`/proxy/`)"
            service = "my-service"
            entryPoints = ["web"]
            # Use of defined middleware for path replacement
            middlewares = ["test-replacepathregex"]

    [http.services]
        [http.services.my-service.loadBalancer]
            [[http.services.my-service.loadBalancer.servers]]
                url = "http://localhost:36001/"

启动微服务：

go run main.go

启动traefik：

traefik --configFile config.toml

现在检查微服务是否正常工作：

curl -XGET 'http://localhost:36001/api/operability/list'

{"message": "ping 123"}

并检查 Traefik v2 是否也能正常工作：

curl -XGET 'http://localhost:36000/proxy/operability/list'

{"message": "ping 123"}

没有 Docker 的 Traefik v2 反向代理

Traefik v2 reverse proxy without Docker

networking

reverse-proxy

go

microservices

traefik