installer: Drop check_location

detect_distro does it all already nowadays, so there's no
real reason to have a separate entry point.

tests/cli-test-xml/compare/virt-install-location-iso.xml

@@ -1,6 +1,11 @@
 <domain type="kvm">
   <name>foobar</name>
   <uuid>00000000-1111-2222-3333-444444444444</uuid>
+  <metadata>
+    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
+      <libosinfo:os id="http://fedoraproject.org/fedora/17"/>
+    </libosinfo:libosinfo>
+  </metadata>
   <memory>65536</memory>
   <currentMemory>65536</currentMemory>
   <vcpu>1</vcpu>
@@ -30,12 +35,12 @@
     <disk type="file" device="disk">
       <driver name="qemu" type="qcow2"/>
       <source file="/dev/default-pool/testvol1.img"/>
-      <target dev="hda" bus="ide"/>
+      <target dev="vda" bus="virtio"/>
     </disk>
     <disk type="file" device="cdrom">
       <driver name="qemu"/>
       <source file="/tmp/fake-fedora17-tree.iso"/>
-      <target dev="hdb" bus="ide"/>
+      <target dev="hda" bus="ide"/>
       <readonly/>
     </disk>
     <controller type="usb" index="0" model="ich9-ehci1"/>
@@ -49,6 +54,13 @@
       <master startport="4"/>
     </controller>
     <console type="pty"/>
+    <channel type="unix">
+      <source mode="bind"/>
+      <target type="virtio" name="org.qemu.guest_agent.0"/>
+    </channel>
+    <channel type="spicevmc">
+      <target type="virtio" name="com.redhat.spice.0"/>
+    </channel>
     <input type="tablet" bus="usb"/>
     <graphics type="spice" port="-1" tlsPort="-1" autoport="yes">
       <image compression="off"/>
@@ -59,11 +71,19 @@
     </video>
     <redirdev bus="usb" type="spicevmc"/>
     <redirdev bus="usb" type="spicevmc"/>
+    <rng model="virtio">
+      <backend model="random">/dev/urandom</backend>
+    </rng>
   </devices>
 </domain>
 <domain type="kvm">
   <name>foobar</name>
   <uuid>00000000-1111-2222-3333-444444444444</uuid>
+  <metadata>
+    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
+      <libosinfo:os id="http://fedoraproject.org/fedora/17"/>
+    </libosinfo:libosinfo>
+  </metadata>
   <memory>65536</memory>
   <currentMemory>65536</currentMemory>
   <vcpu>1</vcpu>
@@ -91,10 +111,10 @@
     <disk type="file" device="disk">
       <driver name="qemu" type="qcow2"/>
       <source file="/dev/default-pool/testvol1.img"/>
-      <target dev="hda" bus="ide"/>
+      <target dev="vda" bus="virtio"/>
     </disk>
     <disk type="file" device="cdrom">
-      <target dev="hdb" bus="ide"/>
+      <target dev="hda" bus="ide"/>
       <readonly/>
     </disk>
     <controller type="usb" index="0" model="ich9-ehci1"/>
@@ -108,6 +128,13 @@
       <master startport="4"/>
     </controller>
     <console type="pty"/>
+    <channel type="unix">
+      <source mode="bind"/>
+      <target type="virtio" name="org.qemu.guest_agent.0"/>
+    </channel>
+    <channel type="spicevmc">
+      <target type="virtio" name="com.redhat.spice.0"/>
+    </channel>
     <input type="tablet" bus="usb"/>
     <graphics type="spice" port="-1" tlsPort="-1" autoport="yes">
       <image compression="off"/>
@@ -118,5 +145,8 @@
     </video>
     <redirdev bus="usb" type="spicevmc"/>
     <redirdev bus="usb" type="spicevmc"/>
+    <rng model="virtio">
+      <backend model="random">/dev/urandom</backend>
+    </rng>
   </devices>
 </domain>

virt-install

@@ -303,13 +303,13 @@ def convert_old_features(options):
 def set_distro_variant(options, guest, installer):
     distro = None
     try:
-        installer.check_location(guest)
+        # This also validates the install location
+        autodistro = installer.detect_distro(guest)
 
         if options.distro_variant == "auto":
-            distro = installer.detect_distro(guest)
+            distro = autodistro
         elif options.distro_variant != "none":
             distro = options.distro_variant
-
     except ValueError as e:
         fail(_("Error validating install location: %s") % str(e))
 

virtinst/installer.py

@@ -13,6 +13,7 @@ import libvirt
 
 from .devices import DeviceDisk
 from .domain import DomainOs
+from .osdict import OSDB
 from .installertreemedia import InstallerTreeMedia
 from . import util
 
@@ -244,15 +245,6 @@ class Installer(object):
                     self._install_bootdev or
                     self._treemedia)
 
-    def check_location(self, guest):
-        """
-        Validate self.location seems to work. This will might hit the
-        network so we don't want to do it on demand.
-        """
-        if self._treemedia:
-            return self._treemedia.check_location(guest)
-        return True
-
     def detect_distro(self, guest):
         """
         Attempt to detect the distro for the Installer's 'location'. If
@@ -262,15 +254,18 @@ class Installer(object):
         :returns: distro variant string, or None
         """
         ret = None
-        try:
-            if self._treemedia:
-                ret = self._treemedia.detect_distro(guest)
-            elif self.cdrom:
-                ret = InstallerTreeMedia.detect_iso_distro(guest, self.cdrom)
+        if self._treemedia:
+            ret = self._treemedia.detect_distro(guest)
+        elif self.cdrom:
+            if guest.conn.is_remote():
+                logging.debug("Can't detect distro for cdrom "
+                    "remote connection.")
             else:
-                logging.debug("No media for distro detection.")
-        except Exception:
-            logging.debug("Error attempting to detect distro.", exc_info=True)
+                osguess = OSDB.guess_os_by_iso(self.cdrom)
+                if osguess:
+                    ret = osguess[0]
+        else:
+            logging.debug("No media for distro detection.")
 
         logging.debug("installer.detect_distro returned=%s", ret)
         return ret

virtinst/installertreemedia.py

@@ -13,9 +13,6 @@ from . import util
 from .devices import DeviceDisk
 from .initrdinject import perform_initrd_injections
 from .kernelupload import upload_kernel_initrd
-from .osdict import OSDB
-
-
 
 
 # Enum of the various install media types we can have
@@ -58,16 +55,6 @@ class InstallerTreeMedia(object):
             raise ValueError(_("Validating install media '%s' failed: %s") %
                 (str(path), e))
 
-    @staticmethod
-    def detect_iso_distro(guest, path):
-        if guest.conn.is_remote():
-            logging.debug("Can't detect distro for media on "
-                "remote connection.")
-            return None
-        ret = OSDB.guess_os_by_iso(path)
-        if ret:
-            return ret[0]
-
     def __init__(self, conn, location):
         self.conn = conn
         self.location = location
@@ -87,6 +74,10 @@ class InstallerTreeMedia(object):
         elif _is_url(self.location):
             self._media_type = MEDIA_URL
 
+        if self.conn.is_remote() and not self._media_type == MEDIA_URL:
+            raise ValueError(_("Cannot access install tree on remote "
+                "connection: %s") % self.location)
+
         if self._media_type == MEDIA_ISO:
             InstallerTreeMedia.validate_path(self.conn, self.location)
 
@@ -163,19 +154,7 @@ class InstallerTreeMedia(object):
         if self._media_type in [MEDIA_ISO]:
             return self.location
 
-    def check_location(self, guest):
-        if self._media_type not in [MEDIA_URL]:
-            return True
-
-        fetcher = self._get_fetcher(guest, None)
-        # This will throw an error for us
-        ignore = self._get_store(guest, fetcher)
-        return True
-
     def detect_distro(self, guest):
-        if self._media_type in [MEDIA_ISO]:
-            return InstallerTreeMedia.detect_iso_distro(guest, self.location)
-
         fetcher = self._get_fetcher(guest, None)
         store = self._get_store(guest, fetcher)
         return store.get_osdict_info()