Docker Volumes and PWD
“Print Working Directory” (PWD) is a current
working folder. It is often used for do a relative path manipulation.
Docker Volumes (docker run -v ...
) are used to bring data content (files) inside a docker container.
The challenge in using volumes is that the behavior of current working directory (pwd) depends on your shell / terminal and your operation system.
Start of a apache based php server
with an image from docker hub. The server is listening on Port 8080, and shows the content of the current folder.
docker run -d -p 8080:80 --name my-apache-php-example -v "$PWD":/var/www/html php:7.2-apache
Here a few examples of mapping a local folder _site
relative from the current directory $(pwd)
to /var/www/html
inside a docker php-apache container, with docker run
.
Placeholder | Command | Description |
---|---|---|
$pwd | -v $PWD/_site:/var/www/html | Default Notation |
$(pwd) | -v $(pwd)/_site:/var/www/html | Mac / Linux Terminal |
%cd% | -v %cd%\_site:/var/www/html | Windows Command Window Syntax (HINT: use \ as path separator) |
${PWD} | -v ${PWD}/_site:/var/www/html | Powershell Windows Desktop |
/$(pwd) | -v /$(pwd)/_site:/var/www/html | Git Bash on Windows |
References
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