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Expand Backend Image Storage

Introduction to how to expand backend image storage.

tip

This method only applies to cases where the glance image service uses local storage, and does not apply to cases where the backend uses S3 as backend storage.

Expansion Applies to the Following Two Cases​

  • New deployment environment /opt/cloud/workspace/data/glance space is too small, insufficient to store required images
  • Existing environment has exhausted storage space, cannot store new images, and existing images are in use and cannot be cleaned and released

New Environment​

The goal is to expand the empty /opt/cloud/workspace/data/glance to ensure it can store required image files.

Expand to Block Device​

Assuming the block device to expand is /dev/sdd.

  • Partition and format /dev/sdd
  • Mount /dev/sdd1 to /opt/cloud/workspace/data/glance directory, and write mount information to /etc/fstab
  • mount /dev/sdd1 /opt/cloud/workspace/data/glance

Expand to Directory​

Assuming expanding to directory /home/glance/images.

  • Mount /home/glance/images directory to /opt/cloud/workspace/data/glance directory, and write mount information to /etc/fstab
  • mount --bind /home/glance/images /opt/cloud/workspace/data/glance

Existing Environment Expansion​

The goal is to expand existing images /opt/cloud/workspace/data/glance.

Expand to Block Device​

Assuming the block device to expand is /dev/sdd.

  • Partition and format /dev/sdd
  • Mount /dev/sdd1 to /mnt directory (mount /dev/sdd1 /mnt)
  • Transfer /opt/cloud/workspace/data/glance images to /mnt (rsync -avp /opt/cloud/workspace/data/glance/* /mnt/)
  • Unmount /dev/sdd1 (umount /dev/sdd1)
  • Mount /dev/sdd1 to /opt/cloud/workspace/data/glance directory, and write mount information to /etc/fstab
  • mount /dev/sdd1 /opt/cloud/workspace/data/glance

Expand to Directory​

Assuming expanding to directory /home/glance/images.

  • Transfer /opt/cloud/workspace/data/glance image files to /home/glance/images directory (rsync -avp /opt/cloud/workspace/data/glance/* /home/glance/images/)
  • Mount /home/glance/images directory to /opt/cloud/workspace/data/glance directory, and write mount information to /etc/fstab
  • mount --bind /home/glance/images /opt/cloud/workspace/data/glance