58 lines
2.1 KiB
Bash
Executable File
58 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright (c) 2017 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# virtualization support "goenabled" check.
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PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin
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NAME=$(basename $0)
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LOG()
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{
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logger "$NAME: $*"
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}
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if [ ${UID} -ne 0 ]; then
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LOG "Error: Need sudo/root permission."
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exit 1
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fi
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# Evaluate various virtualization related facts.
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product_name=$(dmidecode -s system-product-name 2>/dev/null)
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OPTS="product_name:${product_name}, "
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is_virtual=$(/usr/bin/facter is_virtual 2>/dev/null)
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OPTS+="is_virtual:${is_virtual}, "
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host_type=$(/usr/bin/facter virtual 2>/dev/null)
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OPTS+="host_type:${host_type}, "
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cpu_has_vmx=$(grep -w -q vmx /proc/cpuinfo && echo "true" || echo "false")
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OPTS+="cpu_has_vmx:${cpu_has_vmx}, "
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dev_kvm_exists=$([[ -e /dev/kvm ]] && echo "true" || echo "false")
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OPTS+="dev_kvm_exists:${dev_kvm_exists}, "
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nested_virt=$(cat /sys/module/kvm_intel/parameters/nested 2>/dev/null || echo "false")
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OPTS+="nested_virt:${nested_virt}, "
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hardware_virt_supported=$(virt-host-validate qemu 2>/dev/null | grep -q -w -e FAIL && echo "false" || echo "true")
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OPTS+="hardware_virt_supported:${hardware_virt_supported}"
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REASONS=$(virt-host-validate qemu 2>/dev/null | grep -w -e FAIL)
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# Check that virtualization is supported on hardware. It is sufficient just to
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# check the output of virt-host-validate. Additional facts are gathered for
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# information.
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# Notes:
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# - virt-host-validate checks that /dev/kvm exists, and 'vmx' CPU flag present
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# - it is also possible to check whether VT-x is enabled in BIOS by reading
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# Intel MSR register, but checking /dev/kvm is sufficient
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# - 'vmx' cpu flag indicates whether virtualization can be supported
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# - on emulated systems such as VirtualBox or QEMU, vmx is not required
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# - if vmx is enabled on QEMU, it can also support nested virtualization
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if [ "${host_type}" = "physical" ] && [ "${hardware_virt_supported}" == "false" ]; then
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LOG "Virtualization is not supported: ${OPTS}. Failing goenabled check."
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LOG "Failure reasons:"$'\n'"${REASONS}"
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exit 1
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fi
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LOG "Virtualization is supported: ${OPTS}."
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exit 0
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