# Buggy code
def _virtual(osdata):
    """
    Returns what type of virtual hardware is under the hood, kvm or physical
    """
    # This is going to be a monster, if you are running a vm you can test this
    # grain with please submit patches!
    # Provides:
    #   virtual
    #   virtual_subtype
    grains = {"virtual": "physical"}

    # Skip the below loop on platforms which have none of the desired cmds
    # This is a temporary measure until we can write proper virtual hardware
    # detection.
    skip_cmds = ("AIX",)

    # list of commands to be executed to determine the 'virtual' grain
    _cmds = ["systemd-detect-virt", "virt-what", "dmidecode"]
    # test first for virt-what, which covers most of the desired functionality
    # on most platforms
    if not salt.utils.platform.is_windows() and osdata["kernel"] not in skip_cmds:
        if salt.utils.path.which("virt-what"):
            _cmds = ["virt-what"]

    # Check if enable_lspci is True or False
    if __opts__.get("enable_lspci", True) is True:
        # /proc/bus/pci does not exists, lspci will fail
        if os.path.exists("/proc/bus/pci"):
            _cmds += ["lspci"]

    # Add additional last resort commands
    if osdata["kernel"] in skip_cmds:
        _cmds = ()

    # Quick backout for BrandZ (Solaris LX Branded zones)
    # Don't waste time trying other commands to detect the virtual grain
    if (
        HAS_UNAME
        and osdata["kernel"] == "Linux"
        and "BrandZ virtual linux" in os.uname()
    ):
        grains["virtual"] = "zone"
        return grains

    failed_commands = set()
    for command in _cmds:
        args = []
        if osdata["kernel"] == "Darwin":
            command = "system_profiler"
            args = ["SPDisplaysDataType"]
        elif osdata["kernel"] == "SunOS":
            virtinfo = salt.utils.path.which("virtinfo")
            if virtinfo:
                try:
                    ret = __salt__["cmd.run_all"]("{0} -a".format(virtinfo))
                except salt.exceptions.CommandExecutionError:
                    if salt.log.is_logging_configured():
                        failed_commands.add(virtinfo)
                else:
                    if ret["stdout"].endswith("not supported"):
                        command = "prtdiag"
                    else:
                        command = "virtinfo"
            else:
                command = "prtdiag"

        cmd = salt.utils.path.which(command)

        if not cmd:
            continue

        cmd = "{0} {1}".format(cmd, " ".join(args))

        try:
            ret = __salt__["cmd.run_all"](cmd)

            if ret["retcode"] > 0:
                if salt.log.is_logging_configured():
                    # systemd-detect-virt always returns > 0 on non-virtualized
                    # systems
                    # prtdiag only works in the global zone, skip if it fails
                    if (
                        salt.utils.platform.is_windows()
                        or "systemd-detect-virt" in cmd
                        or "prtdiag" in cmd
                    ):
                        continue
                    failed_commands.add(command)
                continue
        except salt.exceptions.CommandExecutionError:
            if salt.log.is_logging_configured():
                if salt.utils.platform.is_windows():
                    continue
                failed_commands.add(command)
            continue

        output = ret["stdout"]
        if command == "system_profiler":
            macoutput = output.lower()
            if "0x1ab8" in macoutput:
                grains["virtual"] = "Parallels"
            if "parallels" in macoutput:
                grains["virtual"] = "Parallels"
            if "vmware" in macoutput:
                grains["virtual"] = "VMware"
            if "0x15ad" in macoutput:
                grains["virtual"] = "VMware"
            if "virtualbox" in macoutput:
                grains["virtual"] = "VirtualBox"
            # Break out of the loop so the next log message is not issued
            break
        elif command == "systemd-detect-virt":
            if output in (
                "qemu",
                "kvm",
                "oracle",
                "xen",
                "bochs",
                "chroot",
                "uml",
                "systemd-nspawn",
            ):
                grains["virtual"] = output
                break
            elif "vmware" in output:
                grains["virtual"] = "VMware"
                break
            elif "microsoft" in output:
                grains["virtual"] = "VirtualPC"
                break
            elif "lxc" in output:
                grains["virtual"] = "LXC"
                break
            elif "systemd-nspawn" in output:
                grains["virtual"] = "LXC"
                break
        elif command == "virt-what":
            output = output.splitlines()[-1]
            if output in ("kvm", "qemu", "uml", "xen", "lxc"):
                grains["virtual"] = output
                break
            elif "vmware" in output:
                grains["virtual"] = "VMware"
                break
            elif "parallels" in output:
                grains["virtual"] = "Parallels"
                break
            elif "hyperv" in output:
                grains["virtual"] = "HyperV"
                break
        elif command == "dmidecode":
            # Product Name: VirtualBox
            if "Vendor: QEMU" in output:
                # FIXME: Make this detect between kvm or qemu
                grains["virtual"] = "kvm"
            if "Manufacturer: QEMU" in output:
                grains["virtual"] = "kvm"
            if "Vendor: Bochs" in output:
                grains["virtual"] = "kvm"
            if "Manufacturer: Bochs" in output:
                grains["virtual"] = "kvm"
            if "BHYVE" in output:
                grains["virtual"] = "bhyve"
            # Product Name: (oVirt) www.ovirt.org
            # Red Hat Community virtualization Project based on kvm
            elif "Manufacturer: oVirt" in output:
                grains["virtual"] = "kvm"
                grains["virtual_subtype"] = "ovirt"
            # Red Hat Enterprise Virtualization
            elif "Product Name: RHEV Hypervisor" in output:
                grains["virtual"] = "kvm"
                grains["virtual_subtype"] = "rhev"
            elif "VirtualBox" in output:
                grains["virtual"] = "VirtualBox"
            # Product Name: VMware Virtual Platform
            elif "VMware" in output:
                grains["virtual"] = "VMware"
            # Manufacturer: Microsoft Corporation
            # Product Name: Virtual Machine
            elif ": Microsoft" in output and "Virtual Machine" in output:
                grains["virtual"] = "VirtualPC"
            # Manufacturer: Parallels Software International Inc.
            elif "Parallels Software" in output:
                grains["virtual"] = "Parallels"
            elif "Manufacturer: Google" in output:
                grains["virtual"] = "kvm"
            # Proxmox KVM
            elif "Vendor: SeaBIOS" in output:
                grains["virtual"] = "kvm"
            # Break out of the loop, lspci parsing is not necessary
            break
        elif command == "lspci":
            # dmidecode not available or the user does not have the necessary
            # permissions
            model = output.lower()
            if "vmware" in model:
                grains["virtual"] = "VMware"
            # 00:04.0 System peripheral: InnoTek Systemberatung GmbH
            #         VirtualBox Guest Service
            elif "virtualbox" in model:
                grains["virtual"] = "VirtualBox"
            elif "qemu" in model:
                grains["virtual"] = "kvm"
            elif "virtio" in model:
                grains["virtual"] = "kvm"
            # Break out of the loop so the next log message is not issued
            break
        elif command == "prtdiag":
            model = output.lower().split("\n")[0]
            if "vmware" in model:
                grains["virtual"] = "VMware"
            elif "virtualbox" in model:
                grains["virtual"] = "VirtualBox"
            elif "qemu" in model:
                grains["virtual"] = "kvm"
            elif "joyent smartdc hvm" in model:
                grains["virtual"] = "kvm"
            break
        elif command == "virtinfo":
            grains["virtual"] = "LDOM"
            break

    choices = ("Linux", "HP-UX")
    isdir = os.path.isdir
    sysctl = salt.utils.path.which("sysctl")
    if osdata["kernel"] in choices:
        if os.path.isdir("/proc"):
            try:
                self_root = os.stat("/")
                init_root = os.stat("/proc/1/root/.")
                if self_root != init_root:
                    grains["virtual_subtype"] = "chroot"
            except (IOError, OSError):
                pass
        if isdir("/proc/vz"):
            if os.path.isfile("/proc/vz/version"):
                grains["virtual"] = "openvzhn"
            elif os.path.isfile("/proc/vz/veinfo"):
                grains["virtual"] = "openvzve"
                # a posteriori, it's expected for these to have failed:
                failed_commands.discard("lspci")
                failed_commands.discard("dmidecode")
        # Provide additional detection for OpenVZ
        if os.path.isfile("/proc/self/status"):
            with salt.utils.files.fopen("/proc/self/status") as status_file:
                vz_re = re.compile(r"^envID:\s+(\d+)$")
                for line in status_file:
                    vz_match = vz_re.match(line.rstrip("\n"))
                    if vz_match and int(vz_match.groups()[0]) != 0:
                        grains["virtual"] = "openvzve"
                    elif vz_match and int(vz_match.groups()[0]) == 0:
                        grains["virtual"] = "openvzhn"
        if isdir("/proc/sys/xen") or isdir("/sys/bus/xen") or isdir("/proc/xen"):
            if os.path.isfile("/proc/xen/xsd_kva"):
                # Tested on CentOS 5.3 / 2.6.18-194.26.1.el5xen
                # Tested on CentOS 5.4 / 2.6.18-164.15.1.el5xen
                grains["virtual_subtype"] = "Xen Dom0"
            else:
                if osdata.get("productname", "") == "HVM domU":
                    # Requires dmidecode!
                    grains["virtual_subtype"] = "Xen HVM DomU"
                elif os.path.isfile("/proc/xen/capabilities") and os.access(
                    "/proc/xen/capabilities", os.R_OK
                ):
                    with salt.utils.files.fopen("/proc/xen/capabilities") as fhr:
                        if "control_d" not in fhr.read():
                            # Tested on CentOS 5.5 / 2.6.18-194.3.1.el5xen
                            grains["virtual_subtype"] = "Xen PV DomU"
                        else:
                            # Shouldn't get to this, but just in case
                            grains["virtual_subtype"] = "Xen Dom0"
                # Tested on Fedora 10 / 2.6.27.30-170.2.82 with xen
                # Tested on Fedora 15 / 2.6.41.4-1 without running xen
                elif isdir("/sys/bus/xen"):
                    if "xen:" in __salt__["cmd.run"]("dmesg").lower():
                        grains["virtual_subtype"] = "Xen PV DomU"
                    elif os.path.isfile("/sys/bus/xen/drivers/xenconsole"):
                        # An actual DomU will have the xenconsole driver
                        grains["virtual_subtype"] = "Xen PV DomU"
            # If a Dom0 or DomU was detected, obviously this is xen
            if "dom" in grains.get("virtual_subtype", "").lower():
                grains["virtual"] = "xen"
        # Check container type after hypervisors, to avoid variable overwrite on containers running in virtual environment.
        if os.path.isfile("/proc/1/cgroup"):
            try:
                with salt.utils.files.fopen("/proc/1/cgroup", "r") as fhr:
                    fhr_contents = fhr.read()
                if ":/lxc/" in fhr_contents:
                    grains["virtual_subtype"] = "LXC"
                elif ":/kubepods/" in fhr_contents:
                    grains["virtual_subtype"] = "kubernetes"
                elif ":/libpod_parent/" in fhr_contents:
                    grains["virtual_subtype"] = "libpod"
                else:
                    if any(
                        x in fhr_contents
                        for x in (":/system.slice/docker", ":/docker/", ":/docker-ce/")
                    ):
                        grains["virtual_subtype"] = "Docker"
            except IOError:
                pass
        if os.path.isfile("/proc/cpuinfo"):
            with salt.utils.files.fopen("/proc/cpuinfo", "r") as fhr:
                if "QEMU Virtual CPU" in fhr.read():
                    grains["virtual"] = "kvm"
        if os.path.isfile("/sys/devices/virtual/dmi/id/product_name"):
            try:
                with salt.utils.files.fopen(
                    "/sys/devices/virtual/dmi/id/product_name", "r"
                ) as fhr:
                    output = salt.utils.stringutils.to_unicode(
                        fhr.read(), errors="replace"
                    )
                    if "VirtualBox" in output:
                        grains["virtual"] = "VirtualBox"
                    elif "RHEV Hypervisor" in output:
                        grains["virtual"] = "kvm"
                        grains["virtual_subtype"] = "rhev"
                    elif "oVirt Node" in output:
                        grains["virtual"] = "kvm"
                        grains["virtual_subtype"] = "ovirt"
                    elif "Google" in output:
                        grains["virtual"] = "gce"
                    elif "BHYVE" in output:
                        grains["virtual"] = "bhyve"
            except IOError:
                pass
    elif osdata["kernel"] == "FreeBSD":
        kenv = salt.utils.path.which("kenv")
        if kenv:
            product = __salt__["cmd.run"]("{0} smbios.system.product".format(kenv))
            maker = __salt__["cmd.run"]("{0} smbios.system.maker".format(kenv))
            if product.startswith("VMware"):
                grains["virtual"] = "VMware"
            if product.startswith("VirtualBox"):
                grains["virtual"] = "VirtualBox"
            if maker.startswith("Xen"):
                grains["virtual_subtype"] = "{0} {1}".format(maker, product)
                grains["virtual"] = "xen"
            if maker.startswith("Microsoft") and product.startswith("Virtual"):
                grains["virtual"] = "VirtualPC"
            if maker.startswith("OpenStack"):
                grains["virtual"] = "OpenStack"
            if maker.startswith("Bochs"):
                grains["virtual"] = "kvm"
        if sysctl:
            hv_vendor = __salt__["cmd.run"]("{0} hw.hv_vendor".format(sysctl))
            model = __salt__["cmd.run"]("{0} hw.model".format(sysctl))
            jail = __salt__["cmd.run"]("{0} -n security.jail.jailed".format(sysctl))
            if "bhyve" in hv_vendor:
                grains["virtual"] = "bhyve"
            if jail == "1":
                grains["virtual_subtype"] = "jail"
            if "QEMU Virtual CPU" in model:
                grains["virtual"] = "kvm"
    elif osdata["kernel"] == "OpenBSD":
        if osdata["manufacturer"] in ["QEMU", "Red Hat"]:
            grains["virtual"] = "kvm"
        if osdata["manufacturer"] == "OpenBSD":
            grains["virtual"] = "vmm"
    elif osdata["kernel"] == "SunOS":
        if grains["virtual"] == "LDOM":
            roles = []
            for role in ("control", "io", "root", "service"):
                subtype_cmd = "{0} -c current get -H -o value {1}-role".format(
                    cmd, role
                )
                ret = __salt__["cmd.run_all"]("{0}".format(subtype_cmd))
                if ret["stdout"] == "true":
                    roles.append(role)
            if roles:
                grains["virtual_subtype"] = roles
        else:
            # Check if it's a "regular" zone. (i.e. Solaris 10/11 zone)
            zonename = salt.utils.path.which("zonename")
            if zonename:
                zone = __salt__["cmd.run"]("{0}".format(zonename))
                if zone != "global":
                    grains["virtual"] = "zone"
            # Check if it's a branded zone (i.e. Solaris 8/9 zone)
            if isdir("/.SUNWnative"):
                grains["virtual"] = "zone"
    elif osdata["kernel"] == "NetBSD":
        if sysctl:
            if "QEMU Virtual CPU" in __salt__["cmd.run"](
                "{0} -n machdep.cpu_brand".format(sysctl)
            ):
                grains["virtual"] = "kvm"
            elif "invalid" not in __salt__["cmd.run"](
                "{0} -n machdep.xen.suspend".format(sysctl)
            ):
                grains["virtual"] = "Xen PV DomU"
            elif "VMware" in __salt__["cmd.run"](
                "{0} -n machdep.dmi.system-vendor".format(sysctl)
            ):
                grains["virtual"] = "VMware"
            # NetBSD has Xen dom0 support
            elif (
                __salt__["cmd.run"]("{0} -n machdep.idle-mechanism".format(sysctl))
                == "xen"
            ):
                if os.path.isfile("/var/run/xenconsoled.pid"):
                    grains["virtual_subtype"] = "Xen Dom0"

    for command in failed_commands:
        log.info(
            "Although '%s' was found in path, the current user "
            "cannot execute it. Grains output might not be "
            "accurate.",
            command,
        )
    return grains


# Traceback (IndexError)
2018-12-28 15:28:11,688 [salt.utils.process:772 ][ERROR   ][19253] An un-handled exception from the multiprocessing process 'Maintenance-17' was caught:
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/salt/utils/process.py", line 765, in _run
return self._original_run()
File "/usr/lib/python2.7/site-packages/salt/master.py", line 233, in run
salt.daemons.masterapi.clean_old_jobs(self.opts)
File "/usr/lib/python2.7/site-packages/salt/daemons/masterapi.py", line 169, in clean_old_jobs
rend=False,
File "/usr/lib/python2.7/site-packages/salt/minion.py", line 901, in __init__
self.opts['grains'] = salt.loader.grains(opts)
File "/usr/lib/python2.7/site-packages/salt/loader.py", line 790, in grains
ret = funcs[key]()
File "/usr/lib/python2.7/site-packages/salt/grains/core.py", line 2064, in os_data
grains.update(_virtual(grains))
File "/usr/lib/python2.7/site-packages/salt/grains/core.py", line 798, in _virtual
output = output.splitlines()[-1]
IndexError: list index out of range

# Fixed code
def _virtual(osdata):
    """
    Returns what type of virtual hardware is under the hood, kvm or physical
    """
    # This is going to be a monster, if you are running a vm you can test this
    # grain with please submit patches!
    # Provides:
    #   virtual
    #   virtual_subtype
    grains = {"virtual": "physical"}

    # Skip the below loop on platforms which have none of the desired cmds
    # This is a temporary measure until we can write proper virtual hardware
    # detection.
    skip_cmds = ("AIX",)

    # list of commands to be executed to determine the 'virtual' grain
    _cmds = ["systemd-detect-virt", "virt-what", "dmidecode"]
    # test first for virt-what, which covers most of the desired functionality
    # on most platforms
    if not salt.utils.platform.is_windows() and osdata["kernel"] not in skip_cmds:
        if salt.utils.path.which("virt-what"):
            _cmds = ["virt-what"]

    # Check if enable_lspci is True or False
    if __opts__.get("enable_lspci", True) is True:
        # /proc/bus/pci does not exists, lspci will fail
        if os.path.exists("/proc/bus/pci"):
            _cmds += ["lspci"]

    # Add additional last resort commands
    if osdata["kernel"] in skip_cmds:
        _cmds = ()

    # Quick backout for BrandZ (Solaris LX Branded zones)
    # Don't waste time trying other commands to detect the virtual grain
    if (
        HAS_UNAME
        and osdata["kernel"] == "Linux"
        and "BrandZ virtual linux" in os.uname()
    ):
        grains["virtual"] = "zone"
        return grains

    failed_commands = set()
    for command in _cmds:
        args = []
        if osdata["kernel"] == "Darwin":
            command = "system_profiler"
            args = ["SPDisplaysDataType"]
        elif osdata["kernel"] == "SunOS":
            virtinfo = salt.utils.path.which("virtinfo")
            if virtinfo:
                try:
                    ret = __salt__["cmd.run_all"]("{0} -a".format(virtinfo))
                except salt.exceptions.CommandExecutionError:
                    if salt.log.is_logging_configured():
                        failed_commands.add(virtinfo)
                else:
                    if ret["stdout"].endswith("not supported"):
                        command = "prtdiag"
                    else:
                        command = "virtinfo"
            else:
                command = "prtdiag"

        cmd = salt.utils.path.which(command)

        if not cmd:
            continue

        cmd = "{0} {1}".format(cmd, " ".join(args))

        try:
            ret = __salt__["cmd.run_all"](cmd)

            if ret["retcode"] > 0:
                if salt.log.is_logging_configured():
                    # systemd-detect-virt always returns > 0 on non-virtualized
                    # systems
                    # prtdiag only works in the global zone, skip if it fails
                    if (
                        salt.utils.platform.is_windows()
                        or "systemd-detect-virt" in cmd
                        or "prtdiag" in cmd
                    ):
                        continue
                    failed_commands.add(command)
                continue
        except salt.exceptions.CommandExecutionError:
            if salt.log.is_logging_configured():
                if salt.utils.platform.is_windows():
                    continue
                failed_commands.add(command)
            continue

        output = ret["stdout"]
        if command == "system_profiler":
            macoutput = output.lower()
            if "0x1ab8" in macoutput:
                grains["virtual"] = "Parallels"
            if "parallels" in macoutput:
                grains["virtual"] = "Parallels"
            if "vmware" in macoutput:
                grains["virtual"] = "VMware"
            if "0x15ad" in macoutput:
                grains["virtual"] = "VMware"
            if "virtualbox" in macoutput:
                grains["virtual"] = "VirtualBox"
            # Break out of the loop so the next log message is not issued
            break
        elif command == "systemd-detect-virt":
            if output in (
                "qemu",
                "kvm",
                "oracle",
                "xen",
                "bochs",
                "chroot",
                "uml",
                "systemd-nspawn",
            ):
                grains["virtual"] = output
                break
            elif "vmware" in output:
                grains["virtual"] = "VMware"
                break
            elif "microsoft" in output:
                grains["virtual"] = "VirtualPC"
                break
            elif "lxc" in output:
                grains["virtual"] = "LXC"
                break
            elif "systemd-nspawn" in output:
                grains["virtual"] = "LXC"
                break
        elif command == "virt-what":
            try:
                output = output.splitlines()[-1]
            except IndexError:
                pass
            if output in ("kvm", "qemu", "uml", "xen", "lxc"):
                grains["virtual"] = output
                break
            elif "vmware" in output:
                grains["virtual"] = "VMware"
                break
            elif "parallels" in output:
                grains["virtual"] = "Parallels"
                break
            elif "hyperv" in output:
                grains["virtual"] = "HyperV"
                break
        elif command == "dmidecode":
            # Product Name: VirtualBox
            if "Vendor: QEMU" in output:
                # FIXME: Make this detect between kvm or qemu
                grains["virtual"] = "kvm"
            if "Manufacturer: QEMU" in output:
                grains["virtual"] = "kvm"
            if "Vendor: Bochs" in output:
                grains["virtual"] = "kvm"
            if "Manufacturer: Bochs" in output:
                grains["virtual"] = "kvm"
            if "BHYVE" in output:
                grains["virtual"] = "bhyve"
            # Product Name: (oVirt) www.ovirt.org
            # Red Hat Community virtualization Project based on kvm
            elif "Manufacturer: oVirt" in output:
                grains["virtual"] = "kvm"
                grains["virtual_subtype"] = "ovirt"
            # Red Hat Enterprise Virtualization
            elif "Product Name: RHEV Hypervisor" in output:
                grains["virtual"] = "kvm"
                grains["virtual_subtype"] = "rhev"
            elif "VirtualBox" in output:
                grains["virtual"] = "VirtualBox"
            # Product Name: VMware Virtual Platform
            elif "VMware" in output:
                grains["virtual"] = "VMware"
            # Manufacturer: Microsoft Corporation
            # Product Name: Virtual Machine
            elif ": Microsoft" in output and "Virtual Machine" in output:
                grains["virtual"] = "VirtualPC"
            # Manufacturer: Parallels Software International Inc.
            elif "Parallels Software" in output:
                grains["virtual"] = "Parallels"
            elif "Manufacturer: Google" in output:
                grains["virtual"] = "kvm"
            # Proxmox KVM
            elif "Vendor: SeaBIOS" in output:
                grains["virtual"] = "kvm"
            # Break out of the loop, lspci parsing is not necessary
            break
        elif command == "lspci":
            # dmidecode not available or the user does not have the necessary
            # permissions
            model = output.lower()
            if "vmware" in model:
                grains["virtual"] = "VMware"
            # 00:04.0 System peripheral: InnoTek Systemberatung GmbH
            #         VirtualBox Guest Service
            elif "virtualbox" in model:
                grains["virtual"] = "VirtualBox"
            elif "qemu" in model:
                grains["virtual"] = "kvm"
            elif "virtio" in model:
                grains["virtual"] = "kvm"
            # Break out of the loop so the next log message is not issued
            break
        elif command == "prtdiag":
            model = output.lower().split("\n")[0]
            if "vmware" in model:
                grains["virtual"] = "VMware"
            elif "virtualbox" in model:
                grains["virtual"] = "VirtualBox"
            elif "qemu" in model:
                grains["virtual"] = "kvm"
            elif "joyent smartdc hvm" in model:
                grains["virtual"] = "kvm"
            break
        elif command == "virtinfo":
            grains["virtual"] = "LDOM"
            break

    choices = ("Linux", "HP-UX")
    isdir = os.path.isdir
    sysctl = salt.utils.path.which("sysctl")
    if osdata["kernel"] in choices:
        if os.path.isdir("/proc"):
            try:
                self_root = os.stat("/")
                init_root = os.stat("/proc/1/root/.")
                if self_root != init_root:
                    grains["virtual_subtype"] = "chroot"
            except (IOError, OSError):
                pass
        if isdir("/proc/vz"):
            if os.path.isfile("/proc/vz/version"):
                grains["virtual"] = "openvzhn"
            elif os.path.isfile("/proc/vz/veinfo"):
                grains["virtual"] = "openvzve"
                # a posteriori, it's expected for these to have failed:
                failed_commands.discard("lspci")
                failed_commands.discard("dmidecode")
        # Provide additional detection for OpenVZ
        if os.path.isfile("/proc/self/status"):
            with salt.utils.files.fopen("/proc/self/status") as status_file:
                vz_re = re.compile(r"^envID:\s+(\d+)$")
                for line in status_file:
                    vz_match = vz_re.match(line.rstrip("\n"))
                    if vz_match and int(vz_match.groups()[0]) != 0:
                        grains["virtual"] = "openvzve"
                    elif vz_match and int(vz_match.groups()[0]) == 0:
                        grains["virtual"] = "openvzhn"
        if isdir("/proc/sys/xen") or isdir("/sys/bus/xen") or isdir("/proc/xen"):
            if os.path.isfile("/proc/xen/xsd_kva"):
                # Tested on CentOS 5.3 / 2.6.18-194.26.1.el5xen
                # Tested on CentOS 5.4 / 2.6.18-164.15.1.el5xen
                grains["virtual_subtype"] = "Xen Dom0"
            else:
                if osdata.get("productname", "") == "HVM domU":
                    # Requires dmidecode!
                    grains["virtual_subtype"] = "Xen HVM DomU"
                elif os.path.isfile("/proc/xen/capabilities") and os.access(
                    "/proc/xen/capabilities", os.R_OK
                ):
                    with salt.utils.files.fopen("/proc/xen/capabilities") as fhr:
                        if "control_d" not in fhr.read():
                            # Tested on CentOS 5.5 / 2.6.18-194.3.1.el5xen
                            grains["virtual_subtype"] = "Xen PV DomU"
                        else:
                            # Shouldn't get to this, but just in case
                            grains["virtual_subtype"] = "Xen Dom0"
                # Tested on Fedora 10 / 2.6.27.30-170.2.82 with xen
                # Tested on Fedora 15 / 2.6.41.4-1 without running xen
                elif isdir("/sys/bus/xen"):
                    if "xen:" in __salt__["cmd.run"]("dmesg").lower():
                        grains["virtual_subtype"] = "Xen PV DomU"
                    elif os.path.isfile("/sys/bus/xen/drivers/xenconsole"):
                        # An actual DomU will have the xenconsole driver
                        grains["virtual_subtype"] = "Xen PV DomU"
            # If a Dom0 or DomU was detected, obviously this is xen
            if "dom" in grains.get("virtual_subtype", "").lower():
                grains["virtual"] = "xen"
        # Check container type after hypervisors, to avoid variable overwrite on containers running in virtual environment.
        if os.path.isfile("/proc/1/cgroup"):
            try:
                with salt.utils.files.fopen("/proc/1/cgroup", "r") as fhr:
                    fhr_contents = fhr.read()
                if ":/lxc/" in fhr_contents:
                    grains["virtual_subtype"] = "LXC"
                elif ":/kubepods/" in fhr_contents:
                    grains["virtual_subtype"] = "kubernetes"
                elif ":/libpod_parent/" in fhr_contents:
                    grains["virtual_subtype"] = "libpod"
                else:
                    if any(
                        x in fhr_contents
                        for x in (":/system.slice/docker", ":/docker/", ":/docker-ce/")
                    ):
                        grains["virtual_subtype"] = "Docker"
            except IOError:
                pass
        if os.path.isfile("/proc/cpuinfo"):
            with salt.utils.files.fopen("/proc/cpuinfo", "r") as fhr:
                if "QEMU Virtual CPU" in fhr.read():
                    grains["virtual"] = "kvm"
        if os.path.isfile("/sys/devices/virtual/dmi/id/product_name"):
            try:
                with salt.utils.files.fopen(
                    "/sys/devices/virtual/dmi/id/product_name", "r"
                ) as fhr:
                    output = salt.utils.stringutils.to_unicode(
                        fhr.read(), errors="replace"
                    )
                    if "VirtualBox" in output:
                        grains["virtual"] = "VirtualBox"
                    elif "RHEV Hypervisor" in output:
                        grains["virtual"] = "kvm"
                        grains["virtual_subtype"] = "rhev"
                    elif "oVirt Node" in output:
                        grains["virtual"] = "kvm"
                        grains["virtual_subtype"] = "ovirt"
                    elif "Google" in output:
                        grains["virtual"] = "gce"
                    elif "BHYVE" in output:
                        grains["virtual"] = "bhyve"
            except IOError:
                pass
    elif osdata["kernel"] == "FreeBSD":
        kenv = salt.utils.path.which("kenv")
        if kenv:
            product = __salt__["cmd.run"]("{0} smbios.system.product".format(kenv))
            maker = __salt__["cmd.run"]("{0} smbios.system.maker".format(kenv))
            if product.startswith("VMware"):
                grains["virtual"] = "VMware"
            if product.startswith("VirtualBox"):
                grains["virtual"] = "VirtualBox"
            if maker.startswith("Xen"):
                grains["virtual_subtype"] = "{0} {1}".format(maker, product)
                grains["virtual"] = "xen"
            if maker.startswith("Microsoft") and product.startswith("Virtual"):
                grains["virtual"] = "VirtualPC"
            if maker.startswith("OpenStack"):
                grains["virtual"] = "OpenStack"
            if maker.startswith("Bochs"):
                grains["virtual"] = "kvm"
        if sysctl:
            hv_vendor = __salt__["cmd.run"]("{0} hw.hv_vendor".format(sysctl))
            model = __salt__["cmd.run"]("{0} hw.model".format(sysctl))
            jail = __salt__["cmd.run"]("{0} -n security.jail.jailed".format(sysctl))
            if "bhyve" in hv_vendor:
                grains["virtual"] = "bhyve"
            if jail == "1":
                grains["virtual_subtype"] = "jail"
            if "QEMU Virtual CPU" in model:
                grains["virtual"] = "kvm"
    elif osdata["kernel"] == "OpenBSD":
        if osdata["manufacturer"] in ["QEMU", "Red Hat"]:
            grains["virtual"] = "kvm"
        if osdata["manufacturer"] == "OpenBSD":
            grains["virtual"] = "vmm"
    elif osdata["kernel"] == "SunOS":
        if grains["virtual"] == "LDOM":
            roles = []
            for role in ("control", "io", "root", "service"):
                subtype_cmd = "{0} -c current get -H -o value {1}-role".format(
                    cmd, role
                )
                ret = __salt__["cmd.run_all"]("{0}".format(subtype_cmd))
                if ret["stdout"] == "true":
                    roles.append(role)
            if roles:
                grains["virtual_subtype"] = roles
        else:
            # Check if it's a "regular" zone. (i.e. Solaris 10/11 zone)
            zonename = salt.utils.path.which("zonename")
            if zonename:
                zone = __salt__["cmd.run"]("{0}".format(zonename))
                if zone != "global":
                    grains["virtual"] = "zone"
            # Check if it's a branded zone (i.e. Solaris 8/9 zone)
            if isdir("/.SUNWnative"):
                grains["virtual"] = "zone"
    elif osdata["kernel"] == "NetBSD":
        if sysctl:
            if "QEMU Virtual CPU" in __salt__["cmd.run"](
                "{0} -n machdep.cpu_brand".format(sysctl)
            ):
                grains["virtual"] = "kvm"
            elif "invalid" not in __salt__["cmd.run"](
                "{0} -n machdep.xen.suspend".format(sysctl)
            ):
                grains["virtual"] = "Xen PV DomU"
            elif "VMware" in __salt__["cmd.run"](
                "{0} -n machdep.dmi.system-vendor".format(sysctl)
            ):
                grains["virtual"] = "VMware"
            # NetBSD has Xen dom0 support
            elif (
                __salt__["cmd.run"]("{0} -n machdep.idle-mechanism".format(sysctl))
                == "xen"
            ):
                if os.path.isfile("/var/run/xenconsoled.pid"):
                    grains["virtual_subtype"] = "Xen Dom0"

    for command in failed_commands:
        log.info(
            "Although '%s' was found in path, the current user "
            "cannot execute it. Grains output might not be "
            "accurate.",
            command,
        )
    return grains