traefik.go: command traefik error: failed to eval New: undefined: xxx

Question

我正在尝试构建一个 Traefik 插件并基于 https://github.com/traefik/plugindemo#local-mode

在本地模式下对其进行测试

现在这个插件什么都不做，只是returns“你好”。

这是我的文件结构：

在 traefik/plugins-local/src/github.com/Hongbo-Miao/traefik-plugin-disable-graphql-introspection 文件夹中，我有：

.traefik.yml

entryPoints:
  graphql-server-entrypoint:
    address: :9000
api:
  insecure: true
  dashboard: true
providers:
  file:
    filename: dynamic_conf.yaml
log:
  level: DEBUG
experimental:
  localPlugins:
    traefik-plugin-disable-graphql-introspection:
      modulename: github.com/Hongbo-Miao/traefik-plugin-disable-graphql-introspection

go.mod

module github.com/Hongbo-Miao/traefik-plugin-disable-graphql-introspection

go 1.17

main.go

package main

import (
    "context"
    "net/http"
)

type Config struct{}

func CreateConfig() *Config {
    return &Config{}
}

type DisableGraphQLIntrospection struct {
    next http.Handler
    name string
}

func New(ctx context.Context, next http.Handler, config *Config, name string) (http.Handler, error) {
    return &DisableGraphQLIntrospection{
        next: next,
        name: name,
    }, nil
}

func (a *DisableGraphQLIntrospection) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
    rw.Write([]byte("hello"))
}

在根文件夹中，我有

traefik.yaml

entryPoints:
  graphql-server-entrypoint:
    address: :9000
api:
  insecure: true
  dashboard: true
providers:
  file:
    filename: dynamic_conf.yaml
log:
  level: DEBUG
experimental:
  localPlugins:
    traefik-plugin-disable-graphql-introspection:
      modulename: github.com/Hongbo-Miao/traefik-plugin-disable-graphql-introspection

dynamic_conf.yaml

http:
  routers:
    graphql-server-entrypoint:
      service: graphql-server-service
      entrypoints:
        - graphql-server-entrypoint
      rule: Host(`localhost`)
      middlewares:
        - my-traefik-plugin-disable-graphql-introspection
  services:
    graphql-server-service:
      loadBalancer:
        servers:
          - url: http://localhost:5000/
  middlewares:
    my-traefik-plugin-disable-graphql-introspection:
      plugin:
        traefik-plugin-disable-graphql-introspection:
          headers:
            Foo: Bar

我有一个 GraphQL 服务器运行ing 在 http://localhost:5000

我希望它通过 Taefik 并通过 http://localhost:9000 公开

然而，当我运行

traefik --configfile=traefik.yaml

在根文件夹中，出现错误

traefik.go:79: command traefik error: failed to eval New: 1:28: undefined: traefik_plugin_disable_graphql_introspection 119

Traefik 插件由嵌入式 Go 解释器 Yaegi 即时执行。

这个错误似乎是八重木抛出的，但是我不知道如何调试。

任何指导将不胜感激！

Answer 1

从 Tom Moulard 那里得到了答复，谢谢！ https://github.com/traefik/plugindemo/issues/15#issuecomment-1123741949

Your error means that Yaegi cannot find the New function of the traefik_plugin_disable_graphql_introspection package. Therefore, you can tell that Yaegi found your plugin, loaded it, but could not find the package. To fix this, you need to change the line package main in your plugin's code, to package traefik_plugin_disable_graphql_introspection.

在 main.go 文件中将 package main 更改为 package traefik_plugin_disable_graphql_introspection 后，现在可以使用了！

traefik.go: command traefik error: failed to eval New: undefined: xxx

traefik.go: command traefik error: failed to eval New: undefined: xxx

go

traefik

traefik-plugins

yaegi