Cannot access to folder outside a container

Question

I wrote an application in C# which need to use a browser instance like chrome. I dockerized the application and the run using:

sudo docker run -d --name myapp --restart=always -e BROWSER_PATH=/usr/bin/chromium-browser myimage

The application start correctly but I get the following error:

Unhandled Exception: System.AggregateException: One or more errors occurred. (Failed to launch browser! path to executable does not exist) ---> System.IO.FileNotFoundException: Failed to launch browser! path to executable does not exist

seems that the Docker container cannot access to the browser folder which is located outside of the container.

I'm using puppeteer-sharp to manage the browser, so the lines which is throwing the error is the folling:

var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
     Headless = true,
     ExecutablePath = Environment.GetEnvironmentVariable("BROWSER_PATH"),
});

as you can see I'm reading the BROWSER_PATH from an environment variable.

How can I fix this?

Thanks.

UPDATE:

I tried to mount the volume as suggested using:

sudo docker run -d --name myapp --restart=always -e BROWSER_PATH=/usr/bin/chromium-browser --v "/$(pwd)/usr/bin/chromium-browser:/usr/bin/chromium-browser" myimage

but I get the same error:

Failed to launch browser! path to executable does not exist

what I did wrong?

Answer 1

You need to mount them in container. https://flaviocopes.com/docker-access-files-outside-container/