CODEWITHSUNDEEP
dockerubuntu-16.04
Zeepblok
Zeepblok

Reputation: 133

Give docker more diskspace for containers

I have a question. Our docker server was out of space for its containers so I gave it a bigger disk from 500GB to 1TB(its a vm) Ubuntu sees this correctily. If I do the command vgs I get this output:

  VG        #PV #LV #SN Attr   VSize   VFree
  Docker-vg   1   2   0 wz--n- 999.52g 500.00g

But Docker still thinks it's out of space. I have rebooted the docker VM but still he thinks it's out of space. If I use the df -h command this is the output:

Filesystem                   Size  Used Avail Use% Mounted on
 udev                         3.9G     0  3.9G   0% /dev
tmpfs                        792M  8.6M  783M   2% /run
/dev/mapper/Docker--vg-root  490G  465G     0 100% /
tmpfs                        3.9G     0  3.9G   0% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/xvda1                   472M  468M     0 100% /boot

As you see the docker-vg still thinks its 490gb I don't know where to look. can someone help me ?

Upvotes: 1

Views: 2154

Answers (2)

BMitch
BMitch

Reputation: 263637

You still need to extend your logical volume and resize the filesystem to use the larger logical volume.

First, with lvextend, I'm not sure if it works with /dev/mapper. If not, you can do an lvdisplay to list your logical volumes:

lvextend -l +100%FREE /dev/mapper/Docker--vg-root

With ext*fs you can then run a resize:

resize2fs /dev/mapper/Docker--vg-root

The command is similar for xfs:

xfs_growfs /dev/mapper/Docker--vg-root

Upvotes: 2

GDG612
GDG612

Reputation: 129

With "docker system prune" you clean some space removing old images and other stuff. If you want your container to be aware of the disk size change, you have to:

docker rmi <image>
docker pull <image>

Upvotes: -1

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