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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.
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/*
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* virt-host-validate-qemu.c: Sanity check a QEMU hypervisor host
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*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <config.h>
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#include "virt-host-validate-qemu.h"
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#include "virt-host-validate-common.h"
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int virHostValidateQEMU(void)
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{
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int ret = 0;
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virHostMsgCheck("QEMU", "%s", ("for hardware virtualization"));
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if (virHostValidateHasCPUFlag("svm") ||
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virHostValidateHasCPUFlag("vmx")) {
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virHostMsgPass();
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if (virHostValidateDevice("QEMU", "/dev/kvm",
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VIR_HOST_VALIDATE_FAIL,
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_("Check that the 'kvm-intel' or 'kvm-amd' modules are "
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"loaded & the BIOS has enabled virtualization")) < 0)
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ret = -1;
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} else {
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virHostMsgFail(VIR_HOST_VALIDATE_WARN,
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_("Only emulated CPUs are available, performance will be significantly limited"));
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}
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if (virHostValidateDevice("QEMU", "/dev/vhost-net",
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VIR_HOST_VALIDATE_WARN,
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_("Load the 'vhost_net' module to improve performance "
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"of virtio networking")) < 0)
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ret = -1;
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if (virHostValidateDevice("QEMU", "/dev/net/tun",
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VIR_HOST_VALIDATE_FAIL,
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_("Load the 'tun' module to enable networking for QEMU guests")) < 0)
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ret = -1;
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return ret;
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}
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