In an empty directory I ran this command

 docker run -ti -u:1000 -v "$PWD/data:/data" ubuntu echo "hello"

This automatically creates a directory named "data" which is great. The problem is that although I specified user id 1000, the directory was created with owner root

My question is: how to make docker create the directory with owner set to 1000?

CodePudding user response：

The reason it's owned by root is that it's created by Docker before the container starts.

If you want it to be created by the container - and by the user running in the container - you could do

docker run -ti -u:1000 -v "$PWD:/host" ubuntu mkdir /host/data

Note that -u:1000 sets the group of the directory. Not the owner. To set the owner, you should use -u 1000 (no colon).