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.
2025-02-25 18:55:26 -06:00 · 2012-01-10 17:31:21 +00:00
parent b66d1bef14
commit 54a38915d8
11 changed files with 657 additions and 2 deletions
--- a/tools/virt-host-validate-qemu.c
+++ b/tools/virt-host-validate-qemu.c
@@ -0,0 +1,57 @@
+/*
+ * virt-host-validate-qemu.c: Sanity check a QEMU 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-qemu.h"
+#include "virt-host-validate-common.h"
+
+int virHostValidateQEMU(void)
+{
+    int ret = 0;
+
+    virHostMsgCheck("QEMU", "%s", ("for hardware virtualization"));
+    if (virHostValidateHasCPUFlag("svm") ||
+        virHostValidateHasCPUFlag("vmx")) {
+        virHostMsgPass();
+        if (virHostValidateDevice("QEMU", "/dev/kvm",
+                                  VIR_HOST_VALIDATE_FAIL,
+                                  _("Check that the 'kvm-intel' or 'kvm-amd' modules are "
+                                    "loaded & the BIOS has enabled virtualization")) < 0)
+            ret = -1;
+    } else {
+        virHostMsgFail(VIR_HOST_VALIDATE_WARN,
+                       _("Only emulated CPUs are available, performance will be significantly limited"));
+    }
+
+    if (virHostValidateDevice("QEMU", "/dev/vhost-net",
+                              VIR_HOST_VALIDATE_WARN,
+                              _("Load the 'vhost_net' module to improve performance "
+                                "of virtio networking")) < 0)
+        ret = -1;
+
+    if (virHostValidateDevice("QEMU", "/dev/net/tun",
+                              VIR_HOST_VALIDATE_FAIL,
+                              _("Load the 'tun' module to enable networking for QEMU guests")) < 0)
+        ret = -1;
+
+    return ret;
+}