CI Templates Server

The CI templates server is a static web server which stores VM disk templates used by CI of several projects. The user-facing URL is yet it is served by a CentOS 8 VM hosted in the PHX oVirt cluster -

Images are spread accross four main directories:

Path Description URL
/var/www/html/repo used for storing lago images
/var/www/html/bundles contains the 'ovirt-demo-tool'
/var/www/html/yum mainly for ost-images
/var/www/html/kubevirt stores images for kubevirt ci

Please note that kubevirt directory should be accessible only from restricted number of allowed CI systems. These restrictions are enforced by a configuration file containing specific whitelisted subnets. The file is located at /etc/httpd/conf.d/templates.conf of templates02 VM.

At the time of writing this document there are no offical backups for the contents of these directories, however recovering from data loss/corruption is feasible in a timely manner.

Disks Layout VM has three disks that are separate from it and stored on storage02-data1

The Disks are:

  • boot
  • templates02-PV01
  • templates02-PV02

The first disk stores the OS and some specific configuration. The two remaining disks form a volume group for storing the images.

Data Recovery

Lago Templates

Most lago images are cached under /var/lib/lago/store/ across different nodes, but require some steps before it is possible to copy them back to the templates machine:

  • Remove the 'phx_repo:' prefix and the ':v1' from suffix. Note that *.lock files are not needed. For instance, phx_repo:el8.2-base:v1.hash --> el8.2-base.hash

  • Compress the image files only using the following command: xz --compress --keep --threads=0 --best --force --verbose --block-size=16777216 /path/to/image/file

  • Make sure the hashes match the compressed images. If not just create a new hash.

  • Copy back the files to /var/www/html/repo. Note that for each image, three files have to be copied:

    • image_name.xz
    • image_name.hash
    • image_name.metadata

OST Images

Regarding ost-images, due to recent efforts they can be recreated and published back to their relevant path. Make sure /var/www/html/yum holds sufficient permissions for the images owner to be able to reupload them.


Similar to Lago tempalates, images for kubevirt are cached under /var/lib/stdci/shared/kubevirt-images/ accross bare metal nodes used by KubeVirt. This path contains directories for different operating systems. Files under each sub-directory have to be renamed before they are copied back to the server.

Before renaming the files, verify the image names KubeVirt actually uses:

For instance, the rhel8/ dir contains these files:

  • disk.img
  • disk.img.sha1

Make sure to rename them to:

  • rhel8.qcow2
  • rhel8.qcow2.sha1

Also make sure the hashes match the original files.