error starting docker daemon on ubuntu 14.04 (Devices cgroup isn't mounted)

Question

I followed docker instructions to install and verify the docker installation (from http://docs.docker.com/linux/step_one/).

I tried on 2 Ubuntu 14.04 machines and on both I got following error when starting docker daemon:

$ sudo docker daemon
INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) 
INFO[0000] [graphdriver] using prior storage driver "aufs" 
INFO[0000] Option DefaultDriver: bridge                 
INFO[0000] Option DefaultNetwork: bridge                
WARN[0000] Running modprobe bridge nf_nat br_netfilter failed with    message: modprobe: WARNING: Module br_netfilter not found. , error: exit status 1 
INFO[0000] Firewalld running: false                     
WARN[0000] Your kernel does not support cgroup memory limit: mountpoint for memory not found 
WARN[0000] mountpoint for cpu not found                 
FATA[0000] Error starting daemon: Devices cgroup isn't mounted 

I appreciate any help to resolve this issue.

Answer 1

Try the following:

• Log into Ubuntu as a user with sudo privileges.
• Edit the /etc/default/grub file.

• Set the GRUB_CMDLINE_LINUX value as follows:

  GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"

• Save and close the file.

• Update GRUB.

  $ sudo update-grub

• Reboot your system.

As per this.

Answer 2

I resolved this issue by starting the docker deamon manually using:

sudo service docker start

Answer 3

I've had this issue with debian.

The package cgroupfs-mount solved that.

sudo aptitude install cgroupfs-mount

Answer 4

I just had to remove any mounts of cgroup from /etc/fstab and I solved the problem for Devices cgroup isn't mounted. I think that Module br_netfilter not found is just a warning and does not prevent Docker from starting. But you can fix it by installing:

apt-get install linux-image-3.19.0-33-generic linux-image-extra-3.19.0-33-generic

The "extra" is needed because aufs is not anymore included with basic image in Ubuntu.

Answer 5

maybe need packages:

apt-get install aufs-tools
apt-get install cgroup-lite

Answer 6

In my case, I didn't have to install or config anything new. Docker was running fine before this failure. Try restarting docker (eg. systemctl restart docker). If it fails, shutdown and cold-boot the machine. Ensure docker is running. After 129 days of uptime, my docker just got in a weird, bad state.