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StorPool naming convention

Here you can find how the OpenNebula's datastores and images are mapped to the StorPool Templates, Volumes, and Snapshots.

Addon version

The addon uses the YY.MM.R versioning schema, where YY is the year of the release, MM is the month of the release, and R is the revision in the month.

Datastore templates

Each Datastore in Opennebula has a StorPool template with the following format:

${ONE_PX}-ds-${DATASTORE_ID}

Images

PERSISTENT images

Each persistent image registered in a StorPool-backed IMAGE datastore is mapped to StorPool volume:

${ONE_PX}-img-${IMAGE_ID}

Non-PERSISTENT images

The non-persistent images are clones of a image registered in the IMAGE datastore mapped to StorPool volume:

${ONE_PX}-img-${IMAGE_ID}-${VM_ID}-${VMDISK_ID}

CDROM images

The images of type CDROM are created like non-persistent images - cloned volumes with additional StorPool tag type=CDROM:

${ONE_PX}-img-${IMAGE_ID}-${VM_ID}-${VMDISK_ID}

VOLATILE images

The volatile images are registered in the StorPool-backed SYSTEM datastore as a StorPool volume:

${ONE_PX}-sys-${VM_ID}-${VMDISK_ID}-raw

CONTEXTUALIZATION images

Each contextualization image registered in a StorPool-backed SYSTEM datastore is mapped to StorPool volume:

${ONE_PX}-sys-${VM_ID}-${VMDISK_ID}-iso

CHECKPOINT images

When the addon is configured in qemu-kvm-ev-backed flavor (SP_CHECKPOINT_BD=1), the VM's checkpoint file is a StorPool volume:

${ONE_PX}-sys-${VM_ID}-rawcheckpoint

When the default qemu-kvm package is used, the StorPool volume holding the archive of the checkpoint file has following name:

${ONE_PX}-sys-${VM_ID}-checkpoint

Staging images

In the process of importing of an image to a StorPool-backed IMAGE datastore, the source is stored temporary on a StorPool volume name suffixed with the md5sum of it's name:

${ONE_PX}-img-${IMAGE_ID}-${MD5SUM}

Snapshots

Disk snapshot

${VOLUME_NAME}-snap${SNAP_ID}

VM snapshot

${VOLUME_NAME}-ONESNAP-${VMSNAPSHOT_ID}-${UNIX_TIMESTAMP}

NVRAM

${ONE_PX}-sys-${VM_ID}-NVRAM