Puppeteer is not found after Dockerization

Question

My issue arises when running my code on a Linux system within a Docker container. The code, which downloads and launches Puppeteer, works flawlessly on my Windows machine. Here's the relevant snippet:

var browserFetcher = new BrowserFetcher();
var installedBrowser = await browserFetcher.DownloadAsync(BrowserTag.Latest);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = true,
    ExecutablePath = browserFetcher.GetExecutablePath(installedBrowser.BuildId)
});

I specifically utilize GetExecutablePath(installedBrowser.BuildId) to avoid hardcoding directories. However, upon building and running the Docker container with an Alpine Linux image, I encounter the following error:

Error: An error occurred trying to start process '/app/Chrome/Linux-124.0.6335.0/chrome-linux64/chrome' with working directory '/app'. No such file or directory

Upon inspecting the container using /bin/sh, I find the necessary files exist:

I'm perplexed by this issue. If further information is required, please let me know. Thank you.

Answer 1

🗎 Dockerfile

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build

WORKDIR /src
COPY ["PuppeteerProject/PuppeteerProject.csproj", "PuppeteerProject/"]
RUN dotnet restore "PuppeteerProject/PuppeteerProject.csproj"

COPY . .
WORKDIR "/src/PuppeteerProject"
RUN dotnet build "PuppeteerProject.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "PuppeteerProject.csproj" -c Release -o /app/publish

FROM mcr.microsoft.com/dotnet/aspnet:6.0

RUN apt-get update && \
    apt-get install -y \
        wget \
        gnupg2 \
        apt-transport-https \
        ca-certificates \
        fonts-liberation \
        libappindicator3-1 \
        libasound2 \
        libatk-bridge2.0-0 \
        libatk1.0-0 \
        libcups2 \
        libdbus-1-3 \
        libgdk-pixbuf2.0-0 \
        libnspr4 \
        libnss3 \
        libx11-xcb1 \
        libxcomposite1 \
        libxdamage1 \
        libxrandr2 \
        xdg-utils \
        libgbm1 \
        libxcb-dri3-0 \
        libxss1 && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY --from=publish /app/publish .
EXPOSE 8000

CMD ["dotnet", "PuppeteerProject.dll"]

The long list of dependencies in the third build stage is to support the browser runtime.

🗎 Program.cs

using System;
using System.Threading.Tasks;
using PuppeteerSharp;

class Program
{
    static async Task Main(string[] args)
    {
        await new BrowserFetcher().DownloadAsync();
        var browser = await Puppeteer.LaunchAsync(new LaunchOptions
        {
            Headless = true,
            Args = new string[] { "--no-sandbox", "--disable-setuid-sandbox" }
        });

        Console.WriteLine("Browser launched successfully.");

        await browser.CloseAsync();
    }
}

The example Program.cs will run and then exit. When it exits the container will terminate.

You can, however, get a more persistent container by commenting out the CMD line in the Dockerfile. Then just run it manually.