Docker run ภายใต้ network ของ container อื่น

docker run -d -p 9222:9222 --rm --name headless-shell chromedp/headless-shell

// Command remote is a chromedp example demonstrating how to connect to an
// existing Chrome DevTools instance using a remote WebSocket URL.
package main

import (
    "context"
    "flag"
    "log"

    "github.com/chromedp/chromedp"
)

func main() {
    devtoolsWsURL := flag.String("devtools-ws-url", "", "DevTools WebSsocket URL")
    flag.Parse()
    if *devtoolsWsURL == "" {
        log.Fatal("must specify -devtools-ws-url")
    }

    // create allocator context for use with creating a browser context later
    allocatorContext, cancel := chromedp.NewRemoteAllocator(context.Background(), *devtoolsWsURL)
    defer cancel()

    // create context
    ctxt, cancel := chromedp.NewContext(allocatorContext)
    defer cancel()

    // run task list
    var body string
    if err := chromedp.Run(ctxt,
        chromedp.Navigate("https://duckduckgo.com"),
        chromedp.WaitVisible("#logo_homepage_link"),
        chromedp.OuterHTML("html", &body),
    ); err != nil {
        log.Fatalf("Failed getting body of duckduckgo.com: %v", err)
    }

    log.Println("Body of duckduckgo.com starts with:")
    log.Println(body[0:100])
}

module example-chromedp-remote

go 1.16

require github.com/chromedp/chromedp v0.7.1

FROM golang:1.16.4-alpine as builder

WORKDIR /app

COPY go.mod /app
COPY main.go /app

RUN go mod download
RUN go build -o app

FROM alpine
COPY --from=builder /app/app /app
ENTRYPOINT ["/app"]

docker build -t example-chromedp-remote .

curl 127.0.0.1:9222/json/version
{
   "Browser": "Chrome/90.0.4430.93",
   "Protocol-Version": "1.3",
   "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36",
   "V8-Version": "9.0.257.23",
   "WebKit-Version": "537.36 (@4df112c29cfe9a2c69b14195c0275faed4e997a7)",
   "webSocketDebuggerUrl": "ws://127.0.0.1:9222/devtools/browser/68424ed8-a10a-4633-9618-f93b443e0aa9"
}

docker run --rm --network="container:headless-shell" example-chromedp-remote -devtools-ws-url="ws://127.0.0.1:9222/devtools/browser/68424ed8-a10a-4633-9618-f93b443e0aa9"

---
version: "3.8"
services:

  chrome-headless:
    image: "chromedp/headless-shell"
    ports:
    - "9222:9222"

  example-chromedp-remote:
    build:
      context: .
    network_mode: "service:chrome-headless"

docker compose up -d chrome-headless

docker compose run --rm example-chromedp-remote -devtools-ws-url="ws://127.0.0.1:9222/devtools/browser/cdaa6d7f-3d08-4593-ad4d-0d630abcd627"