Added a bash script, template_creator, to help with the creation of disk images for templates

README.md

@@ -157,13 +157,13 @@ TODO:
 
 ### Template management
 
-| Done | Route               | Description       | Method | Parameters                        | Required capabilities                 |
-|---   |---                  |---                |---     |---                                |---                                    |
-|      | `/templates`        | create a template | POST   | vmID/qcow,name,description,access | `CAP_TPL_CREATE`                      |
-|  p   | `/templates/{name}` | delete a template | DELETE |                                   | `CAP_TPL_DESTROY|CAP_TPL_DESTROY_ANY` |
-|  p   | `/templates`        | list templates    | GET    |                                   | `CAP_TPL_LIST|CAP_TPL_LIST_ANY`       |
-|  p   | `/templates/{name}` | list a template   | GET    |                                   | `CAP_TPL_LIST|CAP_TPL_LIST_ANY`       |
-|      |                     |                   |        |                                   |                                       |
+| Done | Route               | Description       | Method | Parameters                  | Required capabilities                 |
+|---   |---                  |---                |---     |---                          |---                                    |
+|      | `/templates`        | create a template | POST   | vmID/qcow,name,descr,access | `CAP_TPL_CREATE`                      |
+|  p   | `/templates/{name}` | delete a template | DELETE |                             | `CAP_TPL_DESTROY|CAP_TPL_DESTROY_ANY` |
+|  p   | `/templates`        | list templates    | GET    |                             | `CAP_TPL_LIST|CAP_TPL_LIST_ANY`       |
+|  p   | `/templates/{name}` | list a template   | GET    |                             | `CAP_TPL_LIST|CAP_TPL_LIST_ANY`       |
+|      |                     |                   |        |                             |                                       |
 
 Remarks:
 
@@ -187,7 +187,7 @@ Remarks:
 VM launched with QEMU running a spice server:
 
 ```
-qemu-system-x86_64 -enable-kvm -smp cpus=$CPU -m $RAM -drive file=$DISK,index=0,media=disk,format=qcow2,if=virtio -vga virtio -device virtio-serial-pci -spice port=$SPICE_PORT,password=$SPICE_PWD -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -nic user,mac=$MAC,model=virtio-net-pci -soundhw hda
+qemu-system-x86_64 -enable-kvm -cpu host -smp cpus=$CPU -m $RAM -drive file=$DISK,index=0,media=disk,format=qcow2,if=virtio -vga virtio -device virtio-serial-pci -spice port=$SPICE_PORT,password=$SPICE_PWD -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -nic user,mac=$MAC,model=virtio-net-pci -soundhw hda
 ```
 
 The following parameters are defined at instantiation:
@@ -212,10 +212,16 @@ The following parameters are defined at instantiation:
   ```
 - At creation time, expose an option to choose whether to feature a network interface or not (typically, for exams)
 
-Remark: to list the baking file of a disk:
-```
-qemu-img info --backing-chain disk.qcow
-```
+Remarks:
+
+- To list the baking file of a disk:
+  ```
+  qemu-img info --backing-chain disk.qcow
+  ```
+- To create an empty disk of 200GB:
+  ```
+  qemu-img create -f qcow2 disk.qcow 200G
+  ```
 
 ## File structure
 

tools/template_creator/template_creator

+#!/bin/bash
+
+CPU=2
+RAM=4096
+DISK=disk.qcow
+DISK_SIZE=200G
+
+overwrite=1
+
+function echoerr {
+    echo "$@" >&2
+}
+
+if [ $# -ne 1 ]; then
+    appname=`basename $0`
+    echoerr "$appname, a tool to create a VM template from an ISO image."
+    echoerr "Upon installation completion, \"$DISK\" can be used in a VM template."
+    echoerr "Usage: $appname ISO"
+    echoerr "where ISO is an ISO image file of the OS to install."
+    exit 1
+fi
+
+ISO_IMAGE=$1
+
+if ! [ -f $ISO_IMAGE ]; then
+    echoerr "ISO image \"$ISO_IMAGE\" not found!"
+    exit 1
+fi
+
+if [ -f $DISK ]; then
+    echo "Disk image \"$DISK\" already exists."
+    read -e -p "Overwrite it? [y/N] " choice
+    [[ "$choice" == [Yy]* ]] && overwrite=1 || overwrite=0
+fi
+
+if [ $overwrite -eq 1 ]; then
+    qemu-img create -f qcow2 $DISK $DISK_SIZE
+fi
+
+qemu-system-x86_64 -enable-kvm -cpu host -smp cpus=$CPU -m $RAM -drive file=$DISK,index=0,media=disk,format=qcow2,if=virtio -vga virtio -device virtio-serial-pci -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -nic user,model=virtio-net-pci -soundhw hda -drive file=$ISO_IMAGE,index=1,media=cdrom,format=raw,read-only