Director tripleo image registry cleanup

Solution Verified - Updated -

Environment

  • Red Hat Openstack Platform 16

Issue

  • Undercloud directory /var/lib/image-serve is full of old images and the filesystem is almost full
  • How to remove old images from undercloud image registry?

Resolution

Check what image of every kind is currently running on your environment, and then remove the older ones.
For example, you have those nova-compute images in the registry:

| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1-43                           |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1-48                           |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1-52.1602000860                |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1.3-7                          |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1.5-1.1618380193               |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1.5-4                          |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1.5-4.1619641131               |
| docker://undercloud.ctlplane.mgmt.cloud.internal:8787/rhosp-rhel8/openstack-nova-compute:16.1

  • check the version that is currently running on your compute hosts:

    podman ps --format="table {{.Names}} {{.Image}} {{.Status}}"|grep nova-compute\:

  • and you safely delete the other ones from the director:

    openstack tripleo container image delete $image_name

  • That should free space on disk.

Also, you can remove these data at once by the following procedures.

  1. Get the list of tags you want to keep or delete.

    $ openstack tripleo container image list -f value | awk -F ":" '{print $NF}' | sort | uniq
...
16.1.6-7.1627296585
...

  2. Create /home/stack/cleanup_registry_data.sh, edit deletetags.

    #!/bin/bash

source /home/stack/stackrc 

deletetags="16.1.6-7.1627296585" 

for tag in $deletetags; do
  for image_name in $( openstack tripleo container image list -f value | grep "$tag\$" ); do
    sudo openstack tripleo container image delete -y $image_name
  done
done

  3. Run /home/stack/cleanup_registry_data.sh

Links

Root Cause

Any openstack update, add new images on the registry

Diagnostic Steps

  • From undercloud, check the number of the images of every kind

    openstack tripleo container image list

  • Check the size of the directory that hosts the images regarding to the total space of the partition

    df -hTP /var/lib/image-serve

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