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没有 Docker 的 Traefik v2 反向代理

如何解决没有 Docker 的 Traefik v2 反向代理

我有一个简单的 Golang 微服务(没有 Docker,只是简单的二进制文件),它在 GET 请求时返回简单的消息。

curl -XGET 'http://localhost:36001/apI/Operability/list'

{"message": "ping 123"}

现在我想通过 Traefik-v2 做反向代理,所以我制作了配置文件“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(我使用的是二进制分发版):

traefik --configFile=traefik.toml

现在端口 8091 上的仪表板工作起来很有吸引力,但我在处理反向代理请求方面很挣扎。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'

但我只知道:

未找到 404 页面

问题是:是配置文件错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:

  1. Simple reverse proxy example with Traefik
  2. Traefik v2 as a reverse proxy without docker

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

解决方法

我已经找到了答案。

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

如果您的服务仅侦听确切路径,请使用 Path。例如,路径:/products 将匹配 /products 但不匹配 /products/shoes。

如果您的服务在特定基本路径上侦听,但也在子路径上提供请求,请使用 前缀 匹配器。例如,PathPrefix: /products 将匹配 /products 但也匹配 /products/shoes 和 /products/shirts。由于路径按原样转发,您的服务应该侦听 /products。

  1. 我没有使用任何中间件来替换路径的子字符串

现在作为例子回答。

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 Traefik v2 的配置文件:

[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"}

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