Add a virt-host-validate command to sanity check HV config

To assist people in verifying that their host is operating in an
optimal manner, provide a 'virt-host-validate' command. For each
type of hypervisor, it will check any pre-requisites, or other
good recommendations and report what's working & what is not.

eg

  # virt-host-validate
  QEMU: Checking for device /dev/kvm                                         : FAIL (Check that the 'kvm-intel' or 'kvm-amd' modules are loaded & the BIOS has enabled virtualization)
  QEMU: Checking for device /dev/vhost                                       : WARN (Load the 'vhost_net' module to improve performance of virtio networking)
  QEMU: Checking for device /dev/net/tun                                     : PASS
   LXC: Checking for Linux >= 2.6.26                                         : PASS

This warns people if they have vmx/svm, but don't have /dev/kvm. It
also warns about missing /dev/vhost net.

1 files changed, 37 insertions, 0 deletions

diff --git a/tools/virt-host-validate-lxc.c b/tools/virt-host-validate-lxc.c
new file mode 100644
index 0000000000..9d69b67e6f
--- /dev/null
+++ b/tools/virt-host-validate-lxc.c
@@ -0,0 +1,37 @@
+/*
+ * virt-host-validate-lxc.c: Sanity check a LXC hypervisor host
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ *
+ */
+
+#include <config.h>
+
+#include "virt-host-validate-lxc.h"
+#include "virt-host-validate-common.h"
+
+int virHostValidateLXC(void)
+{
+    int ret = 0;
+
+    if (virHostValidateLinuxKernel("LXC", (2 << 16) | (6 << 8) | 26,
+                                   VIR_HOST_VALIDATE_FAIL,
+                                   _("Upgrade to a kernel supporting namespaces")) < 0)
+        ret = -1;
+
+    return ret;
+}