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File xen-disk-fixes-264.patch of Package salt

From da22c9ee9bd3a2ca34d028e40ff3b476bb944933 Mon Sep 17 00:00:00 2001
From: Cedric Bosdonnat <cbosdonnat@suse.com>
Date: Mon, 5 Oct 2020 15:50:44 +0200
Subject: [PATCH] Xen disk fixes (#264)

* virt: convert volumes to disks for xen

The libvirt xen driver does not handle disk of 'volume' type. We thus
need to convert them into their equivalent using the 'file' or 'block'
type (issue #58333).

* Add pool and volume names to virt._get_all_volumes_paths

In order to avoid code duplication, extend the _get_all_volumes_path()
helper function to also provide the volume and pool names.

* virt.get_disk: show pools and volumes if possible

In some cases like Xen we have to change the volume disks into file or
block ones. Show pool/volumes informations in the virt.get_disk if
possible.

* virt: use the pool path in case the volume doesn't exist

When computing the volume path to generate the XML of a domain, the
volume may not exist yet. This happens typically during a virt.update
when generating the new XML to compare.

In such cases, use the pool target path to compute the volume path.
---
 changelog/58333.fixed                       |   1 +
 salt/modules/virt.py                        | 264 ++++++++++++--------
 salt/templates/virt/libvirt_domain.jinja    |  16 +-
 tests/pytests/unit/modules/virt/conftest.py |   4 +-
 tests/unit/modules/test_virt.py             | 180 +++++--------
 5 files changed, 232 insertions(+), 233 deletions(-)
 create mode 100644 changelog/58333.fixed

diff --git a/changelog/58333.fixed b/changelog/58333.fixed
new file mode 100644
index 0000000000..f958d40964
--- /dev/null
+++ b/changelog/58333.fixed
@@ -0,0 +1 @@
+Convert disks of volume type to file or block disks on Xen
diff --git a/salt/modules/virt.py b/salt/modules/virt.py
index c1a73fcb7f..e306bc0679 100644
--- a/salt/modules/virt.py
+++ b/salt/modules/virt.py
@@ -453,6 +453,8 @@ def _get_disks(conn, dom):
     """
     disks = {}
     doc = ElementTree.fromstring(dom.XMLDesc(0))
+    # Get the path, pool, volume name of each volume we can
+    all_volumes = _get_all_volumes_paths(conn)
     for elem in doc.findall("devices/disk"):
         source = elem.find("source")
         if source is None:
@@ -465,13 +467,61 @@ def _get_disks(conn, dom):
         extra_properties = None
         if "dev" in target.attrib:
             disk_type = elem.get("type")
+
+            def _get_disk_volume_data(pool_name, volume_name):
+                qemu_target = "{}/{}".format(pool_name, volume_name)
+                pool = conn.storagePoolLookupByName(pool_name)
+                vol = pool.storageVolLookupByName(volume_name)
+                vol_info = vol.info()
+                extra_properties = {
+                    "virtual size": vol_info[1],
+                    "disk size": vol_info[2],
+                }
+
+                backing_files = [
+                    {
+                        "file": node.find("source").get("file"),
+                        "file format": node.find("format").get("type"),
+                    }
+                    for node in elem.findall(".//backingStore[source]")
+                ]
+
+                if backing_files:
+                    # We had the backing files in a flat list, nest them again.
+                    extra_properties["backing file"] = backing_files[0]
+                    parent = extra_properties["backing file"]
+                    for sub_backing_file in backing_files[1:]:
+                        parent["backing file"] = sub_backing_file
+                        parent = sub_backing_file
+
+                else:
+                    # In some cases the backing chain is not displayed by the domain definition
+                    # Try to see if we have some of it in the volume definition.
+                    vol_desc = ElementTree.fromstring(vol.XMLDesc())
+                    backing_path = vol_desc.find("./backingStore/path")
+                    backing_format = vol_desc.find("./backingStore/format")
+                    if backing_path is not None:
+                        extra_properties["backing file"] = {"file": backing_path.text}
+                        if backing_format is not None:
+                            extra_properties["backing file"][
+                                "file format"
+                            ] = backing_format.get("type")
+                return (qemu_target, extra_properties)
+
             if disk_type == "file":
                 qemu_target = source.get("file", "")
                 if qemu_target.startswith("/dev/zvol/"):
                     disks[target.get("dev")] = {"file": qemu_target, "zfs": True}
                     continue
-                # Extract disk sizes, snapshots, backing files
-                if elem.get("device", "disk") != "cdrom":
+
+                if qemu_target in all_volumes.keys():
+                    # If the qemu_target is a known path, output a volume
+                    volume = all_volumes[qemu_target]
+                    qemu_target, extra_properties = _get_disk_volume_data(
+                        volume["pool"], volume["name"]
+                    )
+                elif elem.get("device", "disk") != "cdrom":
+                    # Extract disk sizes, snapshots, backing files
                     try:
                         stdout = subprocess.Popen(
                             [
@@ -493,6 +543,12 @@ def _get_disks(conn, dom):
                         disk.update({"file": "Does not exist"})
             elif disk_type == "block":
                 qemu_target = source.get("dev", "")
+                # If the qemu_target is a known path, output a volume
+                if qemu_target in all_volumes.keys():
+                    volume = all_volumes[qemu_target]
+                    qemu_target, extra_properties = _get_disk_volume_data(
+                        volume["pool"], volume["name"]
+                    )
             elif disk_type == "network":
                 qemu_target = source.get("protocol")
                 source_name = source.get("name")
@@ -531,43 +587,9 @@ def _get_disks(conn, dom):
             elif disk_type == "volume":
                 pool_name = source.get("pool")
                 volume_name = source.get("volume")
-                qemu_target = "{}/{}".format(pool_name, volume_name)
-                pool = conn.storagePoolLookupByName(pool_name)
-                vol = pool.storageVolLookupByName(volume_name)
-                vol_info = vol.info()
-                extra_properties = {
-                    "virtual size": vol_info[1],
-                    "disk size": vol_info[2],
-                }
-
-                backing_files = [
-                    {
-                        "file": node.find("source").get("file"),
-                        "file format": node.find("format").get("type"),
-                    }
-                    for node in elem.findall(".//backingStore[source]")
-                ]
-
-                if backing_files:
-                    # We had the backing files in a flat list, nest them again.
-                    extra_properties["backing file"] = backing_files[0]
-                    parent = extra_properties["backing file"]
-                    for sub_backing_file in backing_files[1:]:
-                        parent["backing file"] = sub_backing_file
-                        parent = sub_backing_file
-
-                else:
-                    # In some cases the backing chain is not displayed by the domain definition
-                    # Try to see if we have some of it in the volume definition.
-                    vol_desc = ElementTree.fromstring(vol.XMLDesc())
-                    backing_path = vol_desc.find("./backingStore/path")
-                    backing_format = vol_desc.find("./backingStore/format")
-                    if backing_path is not None:
-                        extra_properties["backing file"] = {"file": backing_path.text}
-                        if backing_format is not None:
-                            extra_properties["backing file"][
-                                "file format"
-                            ] = backing_format.get("type")
+                qemu_target, extra_properties = _get_disk_volume_data(
+                    pool_name, volume_name
+                )
 
             if not qemu_target:
                 continue
@@ -630,6 +652,73 @@ def _get_target(target, ssh):
     return " {}://{}/{}".format(proto, target, "system")
 
 
+def _get_volume_path(pool, volume_name):
+    """
+    Get the path to a volume. If the volume doesn't exist, compute its path from the pool one.
+    """
+    if volume_name in pool.listVolumes():
+        volume = pool.storageVolLookupByName(volume_name)
+        volume_xml = ElementTree.fromstring(volume.XMLDesc())
+        return volume_xml.find("./target/path").text
+
+    # Get the path from the pool if the volume doesn't exist yet
+    pool_xml = ElementTree.fromstring(pool.XMLDesc())
+    pool_path = pool_xml.find("./target/path").text
+    return pool_path + "/" + volume_name
+
+
+def _disk_from_pool(conn, pool, pool_xml, volume_name):
+    """
+    Create a disk definition out of the pool XML and volume name.
+    The aim of this function is to replace the volume-based definition when not handled by libvirt.
+    It returns the disk Jinja context to be used when creating the VM
+    """
+    pool_type = pool_xml.get("type")
+    disk_context = {}
+
+    # handle dir, fs and netfs
+    if pool_type in ["dir", "netfs", "fs"]:
+        disk_context["type"] = "file"
+        disk_context["source_file"] = _get_volume_path(pool, volume_name)
+
+    elif pool_type in ["logical", "disk", "iscsi", "scsi"]:
+        disk_context["type"] = "block"
+        disk_context["format"] = "raw"
+        disk_context["source_file"] = _get_volume_path(pool, volume_name)
+
+    elif pool_type in ["rbd", "gluster", "sheepdog"]:
+        # libvirt can't handle rbd, gluster and sheepdog as volumes
+        disk_context["type"] = "network"
+        disk_context["protocol"] = pool_type
+        # Copy the hosts from the pool definition
+        disk_context["hosts"] = [
+            {"name": host.get("name"), "port": host.get("port")}
+            for host in pool_xml.findall(".//host")
+        ]
+        dir_node = pool_xml.find("./source/dir")
+        # Gluster and RBD need pool/volume name
+        name_node = pool_xml.find("./source/name")
+        if name_node is not None:
+            disk_context["volume"] = "{}/{}".format(name_node.text, volume_name)
+        # Copy the authentication if any for RBD
+        auth_node = pool_xml.find("./source/auth")
+        if auth_node is not None:
+            username = auth_node.get("username")
+            secret_node = auth_node.find("./secret")
+            usage = secret_node.get("usage")
+            if not usage:
+                # Get the usage from the UUID
+                uuid = secret_node.get("uuid")
+                usage = conn.secretLookupByUUIDString(uuid).usageID()
+            disk_context["auth"] = {
+                "type": "ceph",
+                "username": username,
+                "usage": usage,
+            }
+
+    return disk_context
+
+
 def _gen_xml(
     conn,
     name,
@@ -735,41 +824,16 @@ def _gen_xml(
         elif disk.get("pool"):
             disk_context["volume"] = disk["filename"]
             # If we had no source_file, then we want a volume
-            pool_xml = ElementTree.fromstring(
-                conn.storagePoolLookupByName(disk["pool"]).XMLDesc()
-            )
+            pool = conn.storagePoolLookupByName(disk["pool"])
+            pool_xml = ElementTree.fromstring(pool.XMLDesc())
             pool_type = pool_xml.get("type")
-            if pool_type in ["rbd", "gluster", "sheepdog"]:
-                # libvirt can't handle rbd, gluster and sheepdog as volumes
-                disk_context["type"] = "network"
-                disk_context["protocol"] = pool_type
-                # Copy the hosts from the pool definition
-                disk_context["hosts"] = [
-                    {"name": host.get("name"), "port": host.get("port")}
-                    for host in pool_xml.findall(".//host")
-                ]
-                dir_node = pool_xml.find("./source/dir")
-                # Gluster and RBD need pool/volume name
-                name_node = pool_xml.find("./source/name")
-                if name_node is not None:
-                    disk_context["volume"] = "{}/{}".format(
-                        name_node.text, disk_context["volume"]
-                    )
-                # Copy the authentication if any for RBD
-                auth_node = pool_xml.find("./source/auth")
-                if auth_node is not None:
-                    username = auth_node.get("username")
-                    secret_node = auth_node.find("./secret")
-                    usage = secret_node.get("usage")
-                    if not usage:
-                        # Get the usage from the UUID
-                        uuid = secret_node.get("uuid")
-                        usage = conn.secretLookupByUUIDString(uuid).usageID()
-                    disk_context["auth"] = {
-                        "type": "ceph",
-                        "username": username,
-                        "usage": usage,
-                    }
+
+            # For Xen VMs convert all pool types (issue #58333)
+            if hypervisor == "xen" or pool_type in ["rbd", "gluster", "sheepdog"]:
+                disk_context.update(
+                    _disk_from_pool(conn, pool, pool_xml, disk_context["volume"])
+                )
+
             else:
                 if pool_type in ["disk", "logical"]:
                     # The volume format for these types doesn't match the driver format in the VM
@@ -2441,9 +2505,9 @@ def update(
     data = {k: v for k, v in locals().items() if bool(v)}
     if boot_dev:
         data["boot_dev"] = {i + 1: dev for i, dev in enumerate(boot_dev.split())}
-    need_update = salt.utils.xmlutil.change_xml(
-        desc, data, params_mapping
-    ) or need_update
+    need_update = (
+        salt.utils.xmlutil.change_xml(desc, data, params_mapping) or need_update
+    )
 
     # Update the XML definition with the new disks and diff changes
     devices_node = desc.find("devices")
@@ -4092,7 +4156,7 @@ def purge(vm_, dirs=False, removables=False, **kwargs):
             directories.add(os.path.dirname(disks[disk]["file"]))
         else:
             # We may have a volume to delete here
-            matcher = re.match("^(?P<pool>[^/]+)/(?P<volume>.*)$", disks[disk]["file"])
+            matcher = re.match("^(?P<pool>[^/]+)/(?P<volume>.*)$", disks[disk]["file"],)
             if matcher:
                 pool_name = matcher.group("pool")
                 pool = None
@@ -6676,29 +6740,33 @@ def _is_valid_volume(vol):
 
 def _get_all_volumes_paths(conn):
     """
-    Extract the path and backing stores path of all volumes.
+    Extract the path, name, pool name and backing stores path of all volumes.
 
     :param conn: libvirt connection to use
     """
-    volumes = [
-        vol
-        for l in [
-            obj.listAllVolumes()
-            for obj in conn.listAllStoragePools()
-            if obj.info()[0] == libvirt.VIR_STORAGE_POOL_RUNNING
-        ]
-        for vol in l
+    pools = [
+        pool
+        for pool in conn.listAllStoragePools()
+        if pool.info()[0] == libvirt.VIR_STORAGE_POOL_RUNNING
     ]
-    return {
-        vol.path(): [
-            path.text
-            for path in ElementTree.fromstring(vol.XMLDesc()).findall(
-                ".//backingStore/path"
-            )
-        ]
-        for vol in volumes
-        if _is_valid_volume(vol)
-    }
+    volumes = {}
+    for pool in pools:
+        pool_volumes = {
+            volume.path(): {
+                "pool": pool.name(),
+                "name": volume.name(),
+                "backing_stores": [
+                    path.text
+                    for path in ElementTree.fromstring(volume.XMLDesc()).findall(
+                        ".//backingStore/path"
+                    )
+                ],
+            }
+            for volume in pool.listAllVolumes()
+            if _is_valid_volume(volume)
+        }
+        volumes.update(pool_volumes)
+    return volumes
 
 
 def volume_infos(pool=None, volume=None, **kwargs):
@@ -6769,8 +6837,8 @@ def volume_infos(pool=None, volume=None, **kwargs):
             if vol.path():
                 as_backing_store = {
                     path
-                    for (path, all_paths) in backing_stores.items()
-                    if vol.path() in all_paths
+                    for (path, volume) in backing_stores.items()
+                    if vol.path() in volume.get("backing_stores")
                 }
                 used_by = [
                     vm_name
diff --git a/salt/templates/virt/libvirt_domain.jinja b/salt/templates/virt/libvirt_domain.jinja
index 2a2f5e4141..18728a75b5 100644
--- a/salt/templates/virt/libvirt_domain.jinja
+++ b/salt/templates/virt/libvirt_domain.jinja
@@ -33,21 +33,13 @@
                         {% if disk.type == 'file' and 'source_file' in disk -%}
                         <source file='{{ disk.source_file }}' />
                         {% endif %}
+                        {% if disk.type == 'block' -%}
+                        <source dev='{{ disk.source_file }}' />
+                        {% endif %}
                         {% if disk.type == 'volume' and 'pool' in disk -%}
                         <source pool='{{ disk.pool }}' volume='{{ disk.volume }}' />
                         {% endif %}
-                        {%- if disk.type == 'network' %}
-                        <source protocol='{{ disk.protocol }}' name='{{ disk.volume }}'{% if disk.get('query') %} query='{{ disk.query }}'{% endif %}>
-                          {%- for host in disk.get('hosts') %}
-                          <host name='{{ host.name }}'{% if host.get("port") %} port='{{ host.port }}'{% endif %}/>
-                          {%- endfor %}
-                          {%- if disk.get("auth") %}
-                          <auth username='{{ disk.auth.username }}'>
-                            <secret type='{{ disk.auth.type }}' usage='{{ disk.auth.usage}}'/>
-                          </auth>
-                          {%- endif %}
-                        </source>
-                        {%- endif %}
+                        {%- if disk.type == 'network' %}{{ libvirt_disks.network_source(disk) }}{%- endif %}
                         <target dev='{{ disk.target_dev }}' bus='{{ disk.disk_bus }}' />
                         {% if disk.address -%}
                         <address type='drive' controller='0' bus='0' target='0' unit='{{ disk.index }}' />
diff --git a/tests/pytests/unit/modules/virt/conftest.py b/tests/pytests/unit/modules/virt/conftest.py
index d70c2abc9e..1c32ae12eb 100644
--- a/tests/pytests/unit/modules/virt/conftest.py
+++ b/tests/pytests/unit/modules/virt/conftest.py
@@ -48,7 +48,7 @@ class MappedResultMock(MagicMock):
 
 
 @pytest.fixture(autouse=True)
-def setup_loader():
+def setup_loader(request):
     # Create libvirt mock and connection mock
     mock_libvirt = LibvirtMock()
     mock_conn = MagicMock()
@@ -62,7 +62,7 @@ def setup_loader():
         },
         config: {},
     }
-    with pytest.helpers.loader_mock(setup_loader_modules) as loader_mock:
+    with pytest.helpers.loader_mock(request, setup_loader_modules) as loader_mock:
         yield loader_mock
 
 
diff --git a/tests/unit/modules/test_virt.py b/tests/unit/modules/test_virt.py
index 4a4c0395a7..e214e406e2 100644
--- a/tests/unit/modules/test_virt.py
+++ b/tests/unit/modules/test_virt.py
@@ -1138,6 +1138,65 @@ class VirtTestCase(TestCase, LoaderModuleMockMixin):
         self.assertEqual("vdb2", source.attrib["volume"])
         self.assertEqual("raw", disk.find("driver").get("type"))
 
+    def test_get_xml_volume_xen_dir(self):
+        """
+        Test virt._gen_xml generating disks for a Xen hypervisor
+        """
+        self.mock_conn.listStoragePools.return_value = ["default"]
+        pool_mock = MagicMock()
+        pool_mock.XMLDesc.return_value = (
+            "<pool type='dir'><target><path>/path/to/images</path></target></pool>"
+        )
+        volume_xml = "<volume><target><path>/path/to/images/hello_system</path></target></volume>"
+        pool_mock.storageVolLookupByName.return_value.XMLDesc.return_value = volume_xml
+        self.mock_conn.storagePoolLookupByName.return_value = pool_mock
+        diskp = virt._disk_profile(
+            self.mock_conn,
+            None,
+            "xen",
+            [{"name": "system", "pool": "default"}],
+            "hello",
+        )
+        xml_data = virt._gen_xml(
+            self.mock_conn, "hello", 1, 512, diskp, [], "xen", "hvm", "x86_64",
+        )
+        root = ET.fromstring(xml_data)
+        disk = root.findall(".//disk")[0]
+        self.assertEqual(disk.attrib["type"], "file")
+        self.assertEqual(
+            "/path/to/images/hello_system", disk.find("source").attrib["file"]
+        )
+
+    def test_get_xml_volume_xen_block(self):
+        """
+        Test virt._gen_xml generating disks for a Xen hypervisor
+        """
+        self.mock_conn.listStoragePools.return_value = ["default"]
+        pool_mock = MagicMock()
+        pool_mock.listVolumes.return_value = ["vol01"]
+        volume_xml = "<volume><target><path>/dev/to/vol01</path></target></volume>"
+        pool_mock.storageVolLookupByName.return_value.XMLDesc.return_value = volume_xml
+        self.mock_conn.storagePoolLookupByName.return_value = pool_mock
+
+        for pool_type in ["logical", "disk", "iscsi", "scsi"]:
+            pool_mock.XMLDesc.return_value = "<pool type='{}'><source><device path='/dev/sda'/></source></pool>".format(
+                pool_type
+            )
+            diskp = virt._disk_profile(
+                self.mock_conn,
+                None,
+                "xen",
+                [{"name": "system", "pool": "default", "source_file": "vol01"}],
+                "hello",
+            )
+            xml_data = virt._gen_xml(
+                self.mock_conn, "hello", 1, 512, diskp, [], "xen", "hvm", "x86_64",
+            )
+            root = ET.fromstring(xml_data)
+            disk = root.findall(".//disk")[0]
+            self.assertEqual(disk.attrib["type"], "block")
+            self.assertEqual("/dev/to/vol01", disk.find("source").attrib["dev"])
+
     def test_gen_xml_cdrom(self):
         """
         Test virt._gen_xml(), generating a cdrom device (different disk type, no source)
@@ -5499,124 +5558,3 @@ class VirtTestCase(TestCase, LoaderModuleMockMixin):
                 "vol1.qcow2",
                 "/path/to/file",
             )
-
-    def test_get_disks(self):
-        """
-        Test the virt.get_disks function
-        """
-        # test with volumes
-        vm_def = """<domain type='kvm' id='3'>
-          <name>srv01</name>
-          <devices>
-            <disk type='volume' device='disk'>
-              <driver name='qemu' type='qcow2' cache='none' io='native'/>
-              <source pool='default' volume='srv01_system'/>
-              <backingStore/>
-              <target dev='vda' bus='virtio'/>
-              <alias name='virtio-disk0'/>
-              <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
-            </disk>
-            <disk type='volume' device='disk'>
-              <driver name='qemu' type='qcow2' cache='none' io='native'/>
-              <source pool='default' volume='srv01_data'/>
-              <backingStore type='file' index='1'>
-                <format type='qcow2'/>
-                <source file='/var/lib/libvirt/images/vol01'/>
-                <backingStore/>
-              </backingStore>
-              <target dev='vdb' bus='virtio'/>
-              <alias name='virtio-disk1'/>
-              <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
-            </disk>
-            <disk type='volume' device='disk'>
-              <driver name='qemu' type='qcow2' cache='none' io='native'/>
-              <source pool='default' volume='vm05_system'/>
-              <backingStore type='file' index='1'>
-                <format type='qcow2'/>
-                <source file='/var/lib/libvirt/images/vm04_system.qcow2'/>
-                <backingStore type='file' index='2'>
-                  <format type='raw'/>
-                  <source file='/var/testsuite-data/disk-image-template.raw'/>
-                  <backingStore/>
-                </backingStore>
-              </backingStore>
-              <target dev='vdc' bus='virtio'/>
-              <alias name='virtio-disk0'/>
-              <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
-            </disk>
-            <disk type='network' device='cdrom'>
-              <driver name='qemu' type='raw' cache='none' io='native'/>
-              <source protocol='http' name='/pub/iso/myimage.iso' query='foo=bar&amp;baz=flurb' index='1'>
-                <host name='dev-srv.tf.local' port='80'/>
-              </source>
-              <target dev='hda' bus='ide'/>
-              <readonly/>
-              <alias name='ide0-0-0'/>
-              <address type='drive' controller='0' bus='0' target='0' unit='0'/>
-            </disk>
-          </devices>
-        </domain>
-        """
-        self.set_mock_vm("srv01", vm_def)
-
-        pool_mock = MagicMock()
-        pool_mock.storageVolLookupByName.return_value.info.return_value = [
-            0,
-            1234567,
-            12345,
-        ]
-        pool_mock.storageVolLookupByName.return_value.XMLDesc.side_effect = [
-            "<volume />",
-            """
-            <volume>
-              <backingStore>
-                <path>/var/lib/libvirt/images/vol01</path>
-                <format type="qcow2"/>
-              </backingStore>
-            </volume>""",
-        ]
-        self.mock_conn.storagePoolLookupByName.return_value = pool_mock
-
-        self.assertDictEqual(
-            virt.get_disks("srv01"),
-            {
-                "vda": {
-                    "type": "disk",
-                    "file": "default/srv01_system",
-                    "file format": "qcow2",
-                    "disk size": 12345,
-                    "virtual size": 1234567,
-                },
-                "vdb": {
-                    "type": "disk",
-                    "file": "default/srv01_data",
-                    "file format": "qcow2",
-                    "disk size": 12345,
-                    "virtual size": 1234567,
-                    "backing file": {
-                        "file": "/var/lib/libvirt/images/vol01",
-                        "file format": "qcow2",
-                    },
-                },
-                "vdc": {
-                    "type": "disk",
-                    "file": "default/vm05_system",
-                    "file format": "qcow2",
-                    "disk size": 12345,
-                    "virtual size": 1234567,
-                    "backing file": {
-                        "file": "/var/lib/libvirt/images/vm04_system.qcow2",
-                        "file format": "qcow2",
-                        "backing file": {
-                            "file": "/var/testsuite-data/disk-image-template.raw",
-                            "file format": "raw",
-                        },
-                    },
-                },
-                "hda": {
-                    "type": "cdrom",
-                    "file format": "raw",
-                    "file": "http://dev-srv.tf.local:80/pub/iso/myimage.iso?foo=bar&baz=flurb",
-                },
-            },
-        )
-- 
2.29.2
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