[node-patches] Change in ovirt-node[master]: Add ovirt.node.utils.virt

[fabiand at fedoraproject.org]

Fabian Deutsch has uploaded a new change for review.

Change subject: Add ovirt.node.utils.virt
......................................................................

Add ovirt.node.utils.virt

Change-Id: Iffb95b07cd1f8831e29f352005cf8c0aac53281c
Signed-off-by: Fabian Deutsch <fabiand at fedoraproject.org>
---
A scripts/tui/src/ovirt/node/utils/virt.py
1 file changed, 96 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.ovirt.org:29418/ovirt-node refs/changes/05/9905/1

diff --git a/scripts/tui/src/ovirt/node/utils/virt.py b/scripts/tui/src/ovirt/node/utils/virt.py
new file mode 100644
index 0000000..433b813
--- /dev/null
+++ b/scripts/tui/src/ovirt/node/utils/virt.py
@@ -0,0 +1,96 @@
+#!/usr/bin/python
+#
+# virt.py - Copyright (C) 2012 Red Hat, Inc.
+# Written by Fabian Deutsch <fabiand at redhat.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA  02110-1301, USA.  A copy of the GNU General Public License is
+# also available at http://www.gnu.org/copyleft/gpl.html.
+
+"""
+Some convenience functions related to virtualization
+"""
+
+import os.path
+import logging
+import libvirt
+import ovirt.node.utils.process as process
+
+LOGGER = logging.getLogger(__name__)
+
+
+def virtualization_hardware_is_available():
+    """Determins if virtualization hardware is available.
+
+    Returns:
+        True if there is hardware virtualization hardware available
+    """
+    has_virtualization = False
+
+    has_module = False
+    with open("/proc/modules") as modules:
+        for line in modules:
+           has_module = (line.startswith("kvm_intel") or \
+                         line.startswith("kvm_amd"))
+           if has_module:
+               break
+
+    if has_module and os.path.exists("/dev/kvm"):
+        has_virtualization = True
+
+    return has_virtualization
+
+
+def virtualization_hardware_is_enabled():
+    """Determins if virtualization hardware is available and enabled.
+
+    Returns:
+        True if there is hardware virtualization hardware available and enabled
+    """
+    is_enabled = False
+    if virtualization_hardware_is_available():
+        with open("/proc/cpuinfo") as cpuinfo:
+            for line in cpuinfo:
+                if line.startswith("flags"):
+                    if "vmx" in line or "svm" in line:
+                        is_enabled= True
+    return is_enabled
+
+
+def virtualization_hardware_status():
+    """Status of virtualization on this machine.
+
+    Returns:
+        Status of hardware virtualization support on this machine as a human
+        read-able string
+    """
+    if virtualization_hardware_is_enabled():
+        return "Virtualization hardware was detected and is enabled"
+    if virtualization_hardware_is_available():
+        return "Virtualization hardware was detected but is disabled"
+    return "No virtualization hardware was detected on this system"
+
+
+class LibvirtConnection(object):
+    def __init__(self, readonly=True):
+        if readonly:
+            self.con = libvirt.openReadOnly(None)
+        else:
+            raise Exception("Not supported")
+
+    def __enter__(self, *args, **kwargs):
+        return self.con
+
+    def __exit__(self, *args, **kwargs):
+        self.con.close()


--
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iffb95b07cd1f8831e29f352005cf8c0aac53281c
Gerrit-PatchSet: 1
Gerrit-Project: ovirt-node
Gerrit-Branch: master
Gerrit-Owner: Fabian Deutsch <fabiand at fedoraproject.org>