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/var/lib/docker/aufs  takes a lot of space if many containers are running and
writing data to their volumes.

If the gate VM's  /var/lib/docker  partition is small, you could move
/var/lib/docker  to a different partition that is big enough (like /home or /tmp)
and create a symbolic link to  /var/lib/docker.

mv  /var/lib/docker  /home/new_docker_path_with_more_space
ln -s  /home/new_docker_path_with_more_space  /var/lib/docker

Alternatively, you can use the -g option for the docker daemon to use a different
path instead of  /var/lib/docker  if it runs out of disk space.

DOCKER_OPTS="-g /home/new_docker_path_with_more_space"

Restart the docker daemon after making the above change.

https://github.com/docker/docker/issues/3127

Regards,
Vikram Hosakote
IRC: vhosakot

From: Paul Bourke <paul.bourke at oracle.com<mailto:paul.bourke at oracle.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Monday, March 14, 2016 at 11:25 AM
To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: [openstack-dev] [kolla] [infra] Size of images built in the gate

Hi all,

I'm currently working to add new gates for the oraclelinux image base
type (https://blueprints.launchpad.net/kolla/+spec/oraclelinux-gate) and
had a question on size available in the gate VMs.

Right now the binary build is running out of space in the gate, as it
exceeds the 10GB we're allocating for /var/lib/docker. For me, a current
local build using binary+oraclelinux is clocking in at 10.01GB, where as
the centos+binary is a little smaller at 8.89GB.

Is it written anywhere exactly what space is available in the gate VMs?
Sam mentioned briefly that different providers used in the gate give a
variety of disk sizes, so do we have an idea what we can reasonably bump
the docker partition to?

The above number indicates centos will likely soon run into the same
problem as we dockerise more of the big tent, so I think it's a good
idea to check this now before more gates start falling over.

Thanks,
-Paul

p.s. if people are interested here's lists sorted by name of the
oraclelinux and centos builds:

oraclelinux: http://paste.fedoraproject.org/339672/96915914
centos: http://paste.fedoraproject.org/339673/57969163

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