Docker mounting volume. Permission denied

Question

I have a problem with creating new files in mounted docker volume.

Firstly after installation docker i added my user to docker group.

sudo usermod -aG docker $USER

Created as my $USER folder:

mkdir -p /srv/redis

And starting container:

docker run -d -v /srv/redis:/data --name myredis redis

when i want to create file in /srv/redis as a user which created container I have a problem with access.

mkdir /srv/redis/redisTest
mkdir: cannot create directory ‘/srv/redis/redisTest’: Permission denied

I tried to search in other threads but i didn't find appropriate solution.

Answer 1

The question title does not reflect the real problem in my opinion.

mkdir /srv/redis/redisTest
mkdir: cannot create directory ‘/srv/redis/redisTest’: Permission denied

This problem occurs very likely because when you run:

docker run -d -v /srv/redis:/data --name myredis redis

the directory /srv/redis ownership changes to root. You can check that by

ls -lah /srv/redis

This is normal consequence of mounting external directory to docker. To regain access you have to run

sudo chown -R $USER /srv/redis