Docker Devmapper space issue - increase size - linux

Question

I have the same issue as in space issue on docker devmapper and CentOS7
It only specifies to clean up but not how I can increase the space and I dont have any images to clean. I tried several things with dm.min_free_space but nothing worked and want to increase the space.
OS Version/build: Red Hat Enterprise Linux Server release 7.3 (Maipo)
App version:
Client:
Version: 1.12.6
API version: 1.24
Package version: docker-common-1.12.6-11.el7.centos.x86_64
Go version: go1.7.4
Git commit: 96d83a5/1.12.6
Built: Tue Mar 7 09:23:34 2017
OS/Arch: linux/amd64
Server:
Version: 1.12.6
API version: 1.24
Package version: docker-common-1.12.6-11.el7.centos.x86_64
Go version: go1.7.4
Git commit: 96d83a5/1.12.6
Built: Tue Mar 7 09:23:34 2017
OS/Arch: linux/amd64
Steps to reproduce
I have no containers running currently and have some docker images pertaining to Kubernetes which will be used by the Kubernetes service.
sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[kubeuser4#kubenode4 Employee]$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/busybox latest 00f017a8c2a6 5 days ago 1.11 MB
registry.access.redhat.com/rhel7/pod-infrastructure latest 34d3450d733b 6 weeks ago 205 MB
docker.io/java 8 d23bdf5b1b1b 8 weeks ago 643.1 MB
gcr.io/google_containers/heapster_grafana v2.6.0-2 b43443930626 12 months ago 230 MB
When I try to create a docker image of my application that needs to be used, I get the below error.
devmapper: Thin Pool has 8783 free data blocks which is less than minimum required 163840 free data blocks. Create more free space in thin pool or use dm.min_free_space option to change behavior
I tried the cleaning up as mentioned in the other forums, but not helped much and getting the same error. When I tried to run with this sudo docker --storage-opt dm.min_free_space=0%, seems like it starts as a daemon, but still it failed with another error "docker-runc not installed on system" and also I dont want to run it as a daemon.
Below are some command outputs
sudo dmsetup status
localvg00-lv_home: 0 20971520 linear
localvg00-lv_home: 20971520 20971520 linear
docker-251:5-134039-pool: 0 209715200 thin-pool 924 848/524288 1629226/1638400 - rw discard_passdown queue_if_no_space
localvg00-lv_tmp: 0 4194304 linear
localvg00-lv_swap: 0 8388608 linear
localvg00-lv_root: 0 2097152 linear
localvg00-lv_root: 2097152 20971520 linear
localvg00-lv_usr: 0 16777216 linear
localvg00-lv_var: 0 8388608 linear
localvg00-lv_var: 8388608 62914560 linear
sudo docker info
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 4
Server Version: 1.12.6
Storage Driver: devicemapper
Pool Name: docker-251:5-134039-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 106.8 GB
Data Space Total: 107.4 GB
Data Space Available: 601.2 MB
Metadata Space Used: 3.473 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.144 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.135-RHEL7 (2016-11-16)
Logging Driver: journald
Cgroup Driver: systemd
Plugins:
Volume: local
Network: overlay null bridge host
Swarm: inactive
Runtimes: runc docker-runc
Default Runtime: docker-runc
Security Options: seccomp
Kernel Version: 4.1.12-61.1.28.el7uek.x86_64
Operating System: Oracle Linux Server 7.3
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 2
CPUs: 2
Total Memory: 7.545 GiB
Name: kubenode4
I had also tried increasing all the physical volume size and logical volume size(lv_var) on my linux machine, but still it doesnt work.
sudo lvs
[sudo] password for kubeuser4:
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv_home localvg00 -wi-ao---- 20.00g
lv_root localvg00 -wi-ao---- 11.00g
lv_swap localvg00 -wi-ao---- 4.00g
lv_tmp localvg00 -wi-ao---- 2.00g
lv_usr localvg00 -wi-ao---- 8.00g
lv_var localvg00 -wi-ao---- 34.00g
sudo ls -lsh /var/lib/docker/devicemapper/devicemapper/data
2.3G -rw------- 1 root root 100G Mar 14 22:16 /var/lib/docker/devicemapper/devicemapper/data
Someone please let me know how it can be done.
Thanks,

Answer 1

It is better move away from devicemapper for a few reasons.
devicemapper in loopback unrecoverable storage issue: https://github.com/docker/docker/issues/3182 "devicemapper not recommended for production use".
I found it easy enough to switch to overlay storage driver, YMMV of course but hopefully not too much. 'rm -rf /var/lib/docker' is somewhat optional when switching but easy and I would highly recommend it as long as you can load your images back in. http://www.projectatomic.io/blog/2015/06/notes-on-fedora-centos-and-docker-storage-drivers/
systemctl stop docker
rm -rf /var/lib/docker
# if these files do not already exist . . . create them, otherwise you need to edit by hand, you can also just add -s overlay in the systemctl docker script
ls /etc/sysconfig/docker /etc/sysconfig/docker-storage
[[ $? != 0 ]] && {
echo OPTIONS='--selinux-enabled=false' > /etc/sysconfig/docker
echo "DOCKER_STORAGE_OPTIONS= -s overlay" > /etc/sysconfig/docker-storage
}
systemctl start docker
systemctl status docker
docker images
more reading:
https://docs.docker.com/engine/userguide/storagedriver/selectadriver/
https://integratedcode.us/2016/08/30/storage-drivers-in-docker-a-deep-dive/

Answer 2

Was able to get it working and have mentioned it in
https://forums.docker.com/t/devmapper-space-issue/29786/3