Sometimes, when I execute the Chrome inside a docker container I receive the error below:
selenium.common.exceptions.WebDriverException: Message: unknown error: Chrome failed to start: crashed
After looking for about this error, I didn't find good information about it. After I found the root problem I write this post to describe the problem and the solution.
The problem is caused because Chrome uses the /dev/shm to share memory and the docker, by default, set 64MB for this partition.
We need to get this repository and create the docker image with the command:
docker build -t python_selenium_chrome .
After creating the image, we need to run the container with the command:
docker run --shm-size=1b -it python_selenium_chrome bash
Obs.: This command says to docker set the /dev/shm with 1 byte only to show the problem.
Then, we run the file that calls the chrome:
python run_chrome.py
We only need to set the correct value to /dev/shm with the command:
docker run --shm-size=1g -it python_selenium_chrome bash
Then, we run the file that calls the chrome:
python run_chrome.py
We can get the information about the /dev/shm and Chrome in [1]. To check the default values and how to set
the /dev/shm in docker, we can read [2].