MT#6253 Sync deployment.sh with what we have in deployment-iso.git as of commit 9aa7f

deployment.sh

@@ -59,6 +59,10 @@ ENABLE_VM_SERVICES=false
 FILESYSTEM="ext4"
 SYSTEMD=false
 
+# if TARGET_DISK environment variable is set accept it
+if [ -n "$TARGET_DISK" ] ; then
+  export DISK="${TARGET_DISK}"
+else # otherwise try to find sane default
   if [ -L /sys/block/vda ] ; then
     export DISK=vda # will be configured as /dev/vda
   else
@@ -71,6 +75,7 @@ else
       fi
     done
   fi
+fi
 
 ### helper functions {{{
 set_deploy_status() {
@@ -754,6 +759,9 @@ check_for_supported_disk() {
 }
 
 # run in according environment only
+if [ -n "$TARGET_DISK" ] ; then
+  logit "Skipping check for supported disk as TARGET_DISK variable is set."
+else
   if [[ $(imvirt 2>/dev/null) == "Physical" ]] ; then
 
     if ! check_for_supported_disk ; then
@@ -774,6 +782,7 @@ else
       die "Error: /dev/${DISK} does not look like a virtual disk. Exiting to avoid possible data damage. Note: imvirt output is $(imvirt)"
     fi
   fi
+fi
 
 # relevant only while deployment, will be overriden later
 if [ -n "$HOSTNAME" ] ; then