feat: nginx ingress controller forward real ip

service/real-ip/Dockerfile

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+FROM repo.me/external/golang:latest AS builder
+
+WORKDIR /app/build
+
+COPY go.mod .
+COPY go.sum .
+COPY service/real-ip/main.go .
+
+ENV GOPROXY https://goproxy.io
+
+RUN go mod download && go build -ldflags='-s -w' -o real-ip_app .
+
+FROM repo.me/external/alpine:latest
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories && apk add curl
+
+ENV TZ Asia/Shanghai
+
+WORKDIR /app
+
+COPY --from=builder /app/build/real-ip_app .
+
+CMD [ "/app/real-ip_app" ]

service/real-ip/main.go

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+package main
+
+import (
+	"flag"
+	"github.com/loveuer/nf"
+	"github.com/loveuer/nf/nft/log"
+	"time"
+)
+
+var (
+	address string
+)
+
+func init() {
+	flag.StringVar(&address, "address", ":80", "listen address")
+	flag.Parse()
+}
+
+func main() {
+	app := nf.New()
+
+	app.Get("/api/real-ip/available", func(c *nf.Ctx) error {
+		return c.JSON(nf.Map{"status": 200, "data": "available@" + time.Now().Format(time.RFC3339)})
+	})
+
+	app.Get("/api/real-ip/ip", func(c *nf.Ctx) error {
+		headers := c.Request.Header
+
+		return c.JSON(nf.Map{"status": 200, "data": nf.Map{
+			"ip":      c.IP(),
+			"headers": headers,
+		}})
+	})
+
+	log.Fatal(app.Run(address).Error())
+}

service/real-ip/readme.md

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+# enable nginx-ingress-controller real-ip forward
+
+### edit nginx-ingress-controller configmap yaml as blow:
+
+```yaml
+apiVersion: v1
+data:
+  allow-snippet-annotations: 'true'
+  use-forwarded-headers: 'true'
+kind: ConfigMap
+metadata:
+  ...
+```