├── Dockerfile
└── httpenv.go


/Dockerfile:
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1 | FROM golang:alpine
2 | COPY httpenv.go /go
3 | RUN go build httpenv.go
4 | FROM alpine
5 | COPY --from=0 /go/httpenv /httpenv
6 | CMD ["/httpenv"]
7 | EXPOSE 8888
8 | 


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/httpenv.go:
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 1 | package main
 2 | import (
 3 |   "encoding/json"
 4 |   "fmt"
 5 |   "net/http"
 6 |   "os"
 7 |   "strings"
 8 | )
 9 | func serve(w http.ResponseWriter, r *http.Request) {
10 |   env := map[string]string{}
11 |   for _, keyval := range os.Environ() {
12 |     keyval := strings.SplitN(keyval, "=", 2)
13 |     env[keyval[0]] = keyval[1]
14 |   }
15 |   bytes, err := json.Marshal(env)
16 |   if err != nil {
17 |     w.Write([]byte("{}"))
18 |     return
19 |   }
20 |   w.Write([]byte(bytes))
21 | }
22 | func main() {
23 |   fmt.Printf("Starting httpenv listening on port 8888.\n")
24 |   http.HandleFunc("/", serve)
25 |   if err := http.ListenAndServe(":8888", nil); err != nil {
26 |     panic(err)
27 |   }
28 | }
29 | 
30 | 


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