Unable to attach disk using REST API methods.

Issue

• Using REST API version 3 documentation to create VM backups.

• With the REST API command, we are doing the following and it fails at step four.

  1. Search the VM to back up which is called DATA_VM
  2. Search the AGENT_VM UUID that is will perform the backup
  3. Create a snapshot of the DATA_VM
  4. Attach the snapshot disk of the DATA_VM to the AGENT_VM.

• The following is a sample script with REST API commands.

  1 HOST='ovirt-engine.example.com'
  2 USER='admin'
  3 DOMAIN='internal'
  4 PASS='my_password'
  5 DATA_VM='my_prod_vm'
  6 AGENT_VM='my_backup_agent_vm'
  7 DESCRIPTION='my_backup'
  8 
  9 # Search the VM to back up which is called DATA_VM
 10 
 11 SNAPURL=$(curl -k -u "${USER}@${DOMAIN}:${PASS}" -X GET https://${HOST}/ovirt-engine/api/v3/vms?search=${DATA_VM} | xmllint --xpath 'string(//link[@rel="snapshots"]/@href)' -)
 12 
 13 # Search the AGENT_VM UUID that is will perform the backup
 14 
 15 BACKUPURL=$(curl -k -u "${USER}@${DOMAIN}:${PASS}" -X GET https://${HOST}/ovirt-engine/api/v3/vms?search=${AGENT_VM} | xmllint --xpath 'string(/vms/vm/@href)' -)
 16 
 17 # Create a snapshot of the DATA_VM
 18 
 19 URLDISK=$(curl -k -u "${USER}@${DOMAIN}:${PASS}" -X POST -H "Accept: application/xml" -H "Content-type: application/xml" https://${HOST}${SNAPURL} --data-binary @- << EOF | xmllint     --xpath 'string(//link[@rel="disks"]/@href)' -
 20 <snapshot>
 21     <description>${DESCRIPTION}</description>
 22 </snapshot>
 23 EOF)
 24 
 25 # Attach the snapshot disk of the DATA_VM to the AGENT_VM.
 26 
 27 curl -k -u "$USER@$DOMAIN:$PASS" -X GET https://${HOST}${URLDISK} > disktmp.xml
 28 
 29 IDDISK=$(xmllint --xpath 'string(/disks/disk/@id)' disktmp.xml)
 30 IDSNAP=$(xmllint --xpath 'string(/disks/disk/snapshot/@id)' disktmp.xml)
 31 
 32 curl -k -u "${USER}@${DOMAIN}:${PASS}" -X POST -H "Accept: application/xml" -H "Content-type: application/xml" https://${HOST}${BACKUPURL}/disks/ --data-binary @- << EOF
 33 <disk id=\"${IDDISK}\">
 34     <snapshot id=\"${IDSNAP}\"/>
 35     <active>true</active>
 36 </disk>
 37 EOF