Added ability too boot VM from install ISO. System detects an image of type iso. Images is streamed to a VDI and mounted to the VM. Blank disk allocated to VM based on instance type.

Currently available for XenServer.

5 files changed, 178 insertions, 18 deletions

diff --git a/nova/tests/glance/stubs.py b/nova/tests/glance/stubs.py
index d51b19ccd..f2a19f22d 100644
--- a/nova/tests/glance/stubs.py
+++ b/nova/tests/glance/stubs.py
@@ -32,6 +32,7 @@ class FakeGlance(object):
     IMAGE_RAMDISK = 3
     IMAGE_RAW = 4
     IMAGE_VHD = 5
+    IMAGE_ISO = 6
 
     IMAGE_FIXTURES = {
         IMAGE_MACHINE: {
@@ -58,6 +59,11 @@ class FakeGlance(object):
             'image_meta': {'name': 'fakevhd', 'size': 0,
                            'disk_format': 'vhd',
                            'container_format': 'ovf'},
+            'image_data': StringIO.StringIO('')},
+        IMAGE_ISO: {
+            'image_meta': {'name': 'fakeiso', 'size': 0,
+                           'disk_format': 'iso',
+                           'container_format': 'bare'},
             'image_data': StringIO.StringIO('')}}
 
     def __init__(self, host, port=None, use_ssl=False, auth_tok=None):
diff --git a/nova/tests/test_xenapi.py b/nova/tests/test_xenapi.py
index 1deb5a780..2f0559366 100644
--- a/nova/tests/test_xenapi.py
+++ b/nova/tests/test_xenapi.py
@@ -519,6 +519,11 @@ class XenAPIVMTestCase(test.TestCase):
                          os_type="windows", architecture="i386")
         self.check_vm_params_for_windows()
 
+    def test_spawn_iso_glance(self):
+        self._test_spawn(glance_stubs.FakeGlance.IMAGE_ISO, None, None,
+                         os_type="windows", architecture="i386")
+        self.check_vm_params_for_windows()
+
     def test_spawn_glance(self):
         self._test_spawn(glance_stubs.FakeGlance.IMAGE_MACHINE,
                          glance_stubs.FakeGlance.IMAGE_KERNEL,
diff --git a/nova/virt/xenapi/fake.py b/nova/virt/xenapi/fake.py
index d5ac39473..1aa642e4e 100644
--- a/nova/virt/xenapi/fake.py
+++ b/nova/virt/xenapi/fake.py
@@ -194,6 +194,7 @@ def create_local_pifs():
        Do this one per host."""
     for host_ref in _db_content['host'].keys():
         _create_local_pif(host_ref)
+        _create_local_sr_iso(host_ref)
 
 
 def create_local_srs():
@@ -222,6 +223,25 @@ def _create_local_sr(host_ref):
     return sr_ref
 
 
+def _create_local_sr_iso(host_ref):
+    sr_ref = _create_object(
+             'SR',
+             {'name_label': 'Local storage ISO',
+              'type': 'lvm',
+              'content_type': 'iso',
+              'shared': False,
+              'physical_size': str(1 << 30),
+              'physical_utilisation': str(0),
+              'virtual_allocation': str(0),
+              'other_config': {
+                     'i18n-original-value-name_label': 'Local storage ISO',
+                     'i18n-key': 'local-storage-iso'},
+              'VDIs': []})
+    pbd_ref = create_pbd('', host_ref, sr_ref, True)
+    _db_content['SR'][sr_ref]['PBDs'] = [pbd_ref]
+    return sr_ref
+
+
 def _create_local_pif(host_ref):
     pif_ref = _create_object('PIF',
                              {'name-label': 'Fake PIF',
diff --git a/nova/virt/xenapi/vm_utils.py b/nova/virt/xenapi/vm_utils.py
index 6c44d53d4..ba5cf4b49 100644
--- a/nova/virt/xenapi/vm_utils.py
+++ b/nova/virt/xenapi/vm_utils.py
@@ -77,6 +77,7 @@ class ImageType:
         3 - raw disk image (local SR, NOT partitioned by plugin)
         4 - vhd disk image (local SR, NOT inspected by XS, PV assumed for
             linux, HVM assumed for Windows)
+        5 - ISO disk image (local SR, NOT partitioned by plugin)
     """
 
     KERNEL = 0
@@ -84,14 +85,17 @@ class ImageType:
     DISK = 2
     DISK_RAW = 3
     DISK_VHD = 4
-    _ids = (KERNEL, RAMDISK, DISK, DISK_RAW, DISK_VHD)
+    DISK_ISO = 5
+    _ids = (KERNEL, RAMDISK, DISK, DISK_RAW, DISK_VHD, DISK_ISO)
 
     KERNEL_STR = "kernel"
     RAMDISK_STR = "ramdisk"
     DISK_STR = "os"
     DISK_RAW_STR = "os_raw"
     DISK_VHD_STR = "vhd"
-    _strs = (KERNEL_STR, RAMDISK_STR, DISK_STR, DISK_RAW_STR, DISK_VHD_STR)
+    DISK_ISO_STR = "iso"
+    _strs = (KERNEL_STR, RAMDISK_STR, DISK_STR, DISK_RAW_STR, DISK_VHD_STR,
+                DISK_ISO_STR)
 
     @classmethod
     def to_string(cls, image_type):
@@ -223,6 +227,30 @@ class VMHelper(HelperBase):
         return vbd_ref
 
     @classmethod
+    def create_cd_vbd(cls, session, vm_ref, vdi_ref, userdevice, bootable):
+        """Create a VBD record.  Returns a Deferred that gives the new
+        VBD reference specific to CDRom devices."""
+        vbd_rec = {}
+        vbd_rec['VM'] = vm_ref
+        vbd_rec['VDI'] = vdi_ref
+        vbd_rec['userdevice'] = str(userdevice)
+        vbd_rec['bootable'] = bootable
+        vbd_rec['mode'] = 'RO'
+        vbd_rec['type'] = 'CD'
+        vbd_rec['unpluggable'] = True
+        vbd_rec['empty'] = False
+        vbd_rec['other_config'] = {}
+        vbd_rec['qos_algorithm_type'] = ''
+        vbd_rec['qos_algorithm_params'] = {}
+        vbd_rec['qos_supported_algorithms'] = []
+        LOG.debug(_('Creating a CDROM-specific VBD for VM %(vm_ref)s,'
+                ' VDI %(vdi_ref)s ... ') % locals())
+        vbd_ref = session.call_xenapi('VBD.create', vbd_rec)
+        LOG.debug(_('Created a CDROM-specific VBD %(vbd_ref)s '
+                ' for VM %(vm_ref)s, VDI %(vdi_ref)s.') % locals())
+        return vbd_ref
+
+    @classmethod
     def find_vbd_by_number(cls, session, vm_ref, number):
         """Get the VBD reference from the device number"""
         vbd_refs = session.get_xenapi().VM.get_VBDs(vm_ref)
@@ -368,6 +396,23 @@ class VMHelper(HelperBase):
         session.wait_for_task(task, instance.id)
 
     @classmethod
+    def fetch_blank_disk(cls, session, instance_type_id):
+        # Size the blank harddrive to suit the machine type:
+        one_gig = 1024 * 1024 * 1024
+        req_type = instance_types.get_instance_type(instance_type_id)
+        req_size = req_type['local_gb']
+
+        LOG.debug("Creating blank HD of size %(req_size)d gigs"
+                    % locals())
+        vdi_size = one_gig * req_size
+
+        LOG.debug("ISO vm create: Looking for the SR")
+        sr_ref = safe_find_sr(session)
+
+        vdi_ref = cls.create_vdi(session, sr_ref, 'blank HD', vdi_size, False)
+        return vdi_ref
+
+    @classmethod
     def fetch_image(cls, context, session, instance_id, image, user_id,
                     project_id, image_type):
         """Fetch image from glance based on image type.
@@ -449,7 +494,12 @@ class VMHelper(HelperBase):
         # DISK restores
         LOG.debug(_("Fetching image %(image)s") % locals())
         LOG.debug(_("Image Type: %s"), ImageType.to_string(image_type))
-        sr_ref = safe_find_sr(session)
+
+        if image_type == ImageType.DISK_ISO:
+            sr_ref = safe_find_iso_sr(session)
+            LOG.debug(_("ISO: Found sr possibly containing the ISO image"))
+        else:
+            sr_ref = safe_find_sr(session)
 
         glance_client, image_id = nova.image.get_glance_client(image)
         glance_client.set_auth_token(getattr(context, 'auth_token', None))
@@ -527,7 +577,8 @@ class VMHelper(HelperBase):
                              ImageType.RAMDISK: 'RAMDISK',
                              ImageType.DISK: 'DISK',
                              ImageType.DISK_RAW: 'DISK_RAW',
-                             ImageType.DISK_VHD: 'DISK_VHD'}
+                             ImageType.DISK_VHD: 'DISK_VHD',
+                             ImageType.DISK_ISO: 'DISK_ISO'}
             disk_format = pretty_format[image_type]
             image_ref = instance.image_ref
             instance_id = instance.id
@@ -540,7 +591,8 @@ class VMHelper(HelperBase):
                 'aki': ImageType.KERNEL,
                 'ari': ImageType.RAMDISK,
                 'raw': ImageType.DISK_RAW,
-                'vhd': ImageType.DISK_VHD}
+                'vhd': ImageType.DISK_VHD,
+                'iso': ImageType.DISK_ISO}
             image_ref = instance.image_ref
             glance_client, image_id = nova.image.get_glance_client(image_ref)
             meta = glance_client.get_image_meta(image_id)
@@ -574,6 +626,8 @@ class VMHelper(HelperBase):
                available
 
             3. Glance (DISK): pv is assumed
+
+            4. Glance (DISK_ISO): no pv is assumed
         """
 
         LOG.debug(_("Looking up vdi %s for PV kernel"), vdi_ref)
@@ -589,6 +643,9 @@ class VMHelper(HelperBase):
         elif disk_image_type == ImageType.DISK:
             # 3. Disk
             is_pv = True
+        elif disk_image_type == ImageType.DISK_ISO:
+            # 4. ISO
+            is_pv = False
         else:
             raise exception.Error(_("Unknown image format %(disk_image_type)s")
                                   % locals())
@@ -832,6 +889,48 @@ def find_sr(session):
     return None
 
 
+def safe_find_iso_sr(session):
+    """Same as find_iso_sr except raises a NotFound exception if SR cannot be
+    determined
+    """
+    sr_ref = find_iso_sr(session)
+    if sr_ref is None:
+        raise exception.NotFound(_('Cannot find SR of content-type ISO'))
+    return sr_ref
+
+
+def find_iso_sr(session):
+    """Return the storage repository to hold ISO images"""
+    host = session.get_xenapi_host()
+    sr_refs = session.get_xenapi().SR.get_all()
+    for sr_ref in sr_refs:
+        sr_rec = session.get_xenapi().SR.get_record(sr_ref)
+
+        LOG.debug(_("ISO: looking at SR %(sr_rec)s") % locals())
+        if not sr_rec['content_type'] == 'iso':
+            LOG.debug(_("ISO: not iso content"))
+            continue
+        if not 'i18n-key' in sr_rec['other_config']:
+            LOG.debug(_("ISO: iso content_type, no 'i18n-key' key"))
+            continue
+        if not sr_rec['other_config']['i18n-key'] == 'local-storage-iso':
+            LOG.debug(_("ISO: iso content_type, i18n-key value not "
+                        "'local-storage-iso'"))
+            continue
+
+        LOG.debug(_("ISO: SR MATCHing our criteria"))
+        for pbd_ref in sr_rec['PBDs']:
+            LOG.debug(_("ISO: ISO, looking to see if it is host local"))
+            pbd_rec = session.get_xenapi().PBD.get_record(pbd_ref)
+            pbd_rec_host = pbd_rec['host']
+            LOG.debug(_("ISO: PBD matching, want %(pbd_rec)s, have %(host)s") %
+                      locals())
+            if pbd_rec_host == host:
+                LOG.debug(_("ISO: SR with local PBD"))
+                return sr_ref
+    return None
+
+
 def remap_vbd_dev(dev):
     """Return the appropriate location for a plugged-in VBD device
 
diff --git a/nova/virt/xenapi/vmops.py b/nova/virt/xenapi/vmops.py
index b1522729a..1fefd1291 100644
--- a/nova/virt/xenapi/vmops.py
+++ b/nova/virt/xenapi/vmops.py
@@ -235,12 +235,51 @@ class VMOps(object):
 
             raise vm_create_error
 
-        VMHelper.create_vbd(session=self._session, vm_ref=vm_ref,
-                vdi_ref=first_vdi_ref, userdevice=0, bootable=True)
+        # Add disks to VM
+        self._attach_disks(instance, disk_image_type, vm_ref, first_vdi_ref,
+            vdis)
+
+        # Alter the image before VM start for, e.g. network injection
+        if FLAGS.flat_injected:
+            VMHelper.preconfigure_instance(self._session, instance,
+                                           first_vdi_ref, network_info)
+
+        self.create_vifs(vm_ref, instance, network_info)
+        self.inject_network_info(instance, network_info, vm_ref)
+        return vm_ref
+
+    def _attach_disks(self, instance, disk_image_type, vm_ref, first_vdi_ref,
+            vdis):
+        # device 0 reserved for RW disk
+        userdevice = 0
+
+        # DISK_ISO needs two VBDs: the ISO disk and a blank RW disk
+        if disk_image_type == ImageType.DISK_ISO:
+            LOG.debug("detected ISO image type, going to create blank VM for "
+                  "install")
+
+            cd_vdi_ref = first_vdi_ref
+            first_vdi_ref = VMHelper.fetch_blank_disk(session=self._session,
+                        instance_type_id=instance.instance_type_id)
+
+            VMHelper.create_vbd(session=self._session, vm_ref=vm_ref,
+                vdi_ref=first_vdi_ref, userdevice=userdevice, bootable=False)
+
+            # device 1 reserved for rescue disk and we've used '0'
+            userdevice = 2
+            VMHelper.create_cd_vbd(session=self._session, vm_ref=vm_ref,
+                    vdi_ref=cd_vdi_ref, userdevice=userdevice, bootable=True)
+
+            # set user device to next free value
+            userdevice += 1
+        else:
+            VMHelper.create_vbd(session=self._session, vm_ref=vm_ref,
+                vdi_ref=first_vdi_ref, userdevice=userdevice, bootable=True)
+            # set user device to next free value
+            # userdevice 1 is reserved for rescue and we've used '0'
+            userdevice = 2
 
         # Attach any other disks
-        # userdevice 1 is reserved for rescue
-        userdevice = 2
         for vdi in vdis[1:]:
             # vdi['vdi_type'] is either 'os' or 'swap', but we don't
             # really care what it is right here.
@@ -251,15 +290,6 @@ class VMOps(object):
                     bootable=False)
             userdevice += 1
 
-        # Alter the image before VM start for, e.g. network injection
-        if FLAGS.flat_injected:
-            VMHelper.preconfigure_instance(self._session, instance,
-                                           first_vdi_ref, network_info)
-
-        self.create_vifs(vm_ref, instance, network_info)
-        self.inject_network_info(instance, network_info, vm_ref)
-        return vm_ref
-
     def _spawn(self, instance, vm_ref):
         """Spawn a new instance."""
         LOG.debug(_('Starting VM %s...'), vm_ref)