Docker Machine: No space left on device

Question

I'm trying to set up Docker Machine with Docker Compose.

Scenario 1 (without Docker Machine)
If I run docker-compose up -d without Docker Machine, it creates my 3 linked containers as intented (nginx+mongodb+nodejs).

Scenario 2 (with Docker Machine)
Then I create a VM using Docker Machine and tell Docker to talk to that machine with eval $(docker-machine env streambacker-dev).

At this point, if I ssh to my docker machine and run df -h, I get:

If I then run docker-compose up -d, I get a "no space left on device" error while downloading the last container.

"tmpfs" seems to be indeed a bit full after that:

Checking the --virtualbox-disk-size option shows that it defaults to 20000 MB, which I think is what we can see as "/dev/sda1" on both pictures. So why are containers filling up "tmpfs" n and what exactly is "tmpfs"? Is is a temporary download directory? How can I create more space for my containers?

Thanks!

For information, I'm using Docker Machine 0.4.0-rc2 and Docker Compose 1.3.2.

Answer 1

I had the same error ([ERROR] InnoDB: Error number 28 means 'No space left on device') and solve it this way:

1 . Delete the orphaned volumes in Docker, you can use the built-in docker volume command. The built-in command also deletes any directory in /var/lib/docker/volumes that is not a volume so make sure you didn't put anything in there you want to save.

Warning be very careful with this if you have some data you want to keep

Cleanup:

$ docker volume rm $(docker volume ls -qf dangling=true)

Additional commands:

List dangling volumes:

$ docker volume ls -qf dangling=true

List all volumes:

$ docker volume ls

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2 . Also consider removing all the unused Images.

First get rid of the <none> images (those are sometimes generated while building an image and if for any reason the image building was interrupted, they stay there).

here's a nice script I use to remove them

docker rmi $(docker images | grep "^<none>" | awk '{print $3}')

Then if you are using Docker Compose to build Images locally for every project. You will end up with a lot of images usually named like your folder (example if your project folder named Hello, you will find images name Hello_blablabla). so also consider removing all these images

you can edit the above script to remove them or remove them manually with

docker rmi {image-name}