feat: Verify clocksource is set to TSC (#547) (ba28a847) · Commits · git-mirror / Qemu

readme.md

+17 −13

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		@@ -10,9 +10,11 @@

		</div></h1>

		QEMU in a docker container for running x86 and x64 virtual machines.
		Docker container for running virtual machines using QEMU.

		It uses high-performance QEMU options (like KVM acceleration, kernel-mode networking, IO threading, etc.) to achieve near-native speed.
		It allows you to create VM's which behave just like normal containers, meaning you can manage them using all your existing tools (like Portainer) and configure them in a language (YAML) you are already familiar with.

		This greatly reduces the learning curve and also eliminates the need for a dedicated Proxmox or ESXi server in many cases. It uses high-performance QEMU options (like KVM acceleration, kernel-mode networking, IO threading, etc.) to achieve near-native speed.

		## Features

		@@ -124,17 +126,6 @@ kubectl apply -f kubernetes.yml

		If it still fails to boot, you can set the value to `ide` to emulate a IDE drive, which is slow but requires no drivers and is compatible with almost every system.

		* ### How do I verify if my system supports KVM?

		To verify if your system supports KVM, run the following commands:

		```bash
		sudo apt install cpu-checker
		sudo kvm-ok
		```

		If you receive an error from `kvm-ok` indicating that KVM acceleration can't be used, check the virtualization settings in the BIOS.

		* ### How do I change the amount of CPU or RAM?

		By default, the container will be allowed to use a maximum of 1 CPU core and 1 GB of RAM.
		@@ -147,6 +138,19 @@ kubectl apply -f kubernetes.yml
		CPU_CORES: "4"
		```

		* ### How do I verify if my system supports KVM?

		To verify that your system supports KVM, run the following commands:

		```bash
		sudo apt install cpu-checker
		sudo kvm-ok
		```

		If you receive an error from `kvm-ok` indicating that KVM acceleration can't be used, check whether the virtualization extensions (`Intel VT-x` or `AMD SVM`) are enabled in your BIOS. If you are running the container inside a VM instead of directly on the host, you will also need to enable nested virtualization in its settings. If you are using a cloud provider, you may be out of luck as most of them do not allow nested virtualization for their VPS's. If you are using Windows 10 or MacOS, you are also out of luck, as only Linux and Windows 11 support KVM.

		If you don't receive any error from `kvm-ok` at all, but the container still complains that `/dev/kvm` is missing, it might help to add `privileged: true` to your compose file (or `--privileged` to your `run` command), to rule out any permission issue.

		* ### How do I assign an individual IP address to the container?

		By default, the container uses bridge networking, which shares the IP address with the host.

src/disk.sh

+33 −6

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		@@ -373,7 +373,8 @@ createDevice () {
		;;
		"ide" )
		result+=",if=none \
		-device ide-hd,drive=${DISK_ID},bus=ide.$DISK_INDEX,rotation_rate=$DISK_ROTATION${index}"
		-device ich9-ahci,id=ahci${DISK_INDEX},addr=$DISK_ADDRESS,iothread=io2 \
		-device ide-hd,drive=${DISK_ID},bus=ahci$DISK_INDEX.0,rotation_rate=$DISK_ROTATION${index}"
		echo "$result"
		;;
		"blk" \| "virtio-blk" )
		@@ -403,7 +404,7 @@ addMedia () {
		local index=""
		local DISK_ID="cdrom$DISK_BUS"
		[ -n "$DISK_INDEX" ] && index=",bootindex=$DISK_INDEX"
		local result="-drive file=$DISK_FILE,id=$DISK_ID,format=raw,readonly=on,media=cdrom"
		local result="-drive file=$DISK_FILE,id=$DISK_ID,format=raw,cache=unsafe,readonly=on,media=cdrom"

		case "${DISK_TYPE,,}" in
		"auto" )
		@@ -416,7 +417,8 @@ addMedia () {
		;;
		"ide" )
		result+=",if=none \
		-device ide-cd,drive=${DISK_ID},bus=ide.${DISK_BUS}${index}"
		-device ich9-ahci,id=ahci${DISK_BUS},addr=$DISK_ADDRESS,iothread=io2 \
		-device ide-cd,drive=${DISK_ID},bus=ahci${DISK_BUS}.0${index}"
		echo "$result"
		;;
		"blk" \| "virtio-blk" )
		@@ -529,10 +531,30 @@ html "Initializing disks..."

		case "${DISK_TYPE,,}" in
		"ide" \| "usb" \| "scsi" \| "blk" \| "auto" ) ;;
		* ) error "Invalid DISK_TYPE, value \"$DISK_TYPE\" is unrecognized!" && exit 80 ;;
		* ) error "Invalid DISK_TYPE specified, value \"$DISK_TYPE\" is unrecognized!" && exit 80 ;;
		esac

		[[ "${MACHINE,,}" != "virt" ]] && MEDIA_TYPE="ide" \|\| MEDIA_TYPE="auto"
		if [ -z "${MEDIA_TYPE:-}" ]; then
		case "${DISK_TYPE,,}" in
		"ide" \| "usb" \| "scsi" )
		if [[ "${MACHINE,,}" == "virt" ]]; then
		MEDIA_TYPE="auto"
		else
		MEDIA_TYPE="$DISK_TYPE"
		fi ;;
		"blk" \| "auto" )
		if [[ "${MACHINE,,}" != "virt" ]] && [[ "${MACHINE,,}" != "pc-i440fx-2"* ]]; then
		MEDIA_TYPE="ide"
		else
		MEDIA_TYPE="auto"
		fi ;;
		esac
		fi

		case "${MEDIA_TYPE,,}" in
		"ide" \| "usb" \| "scsi" \| "blk" \| "auto" ) ;;
		* ) error "Invalid MEDIA_TYPE specified, value \"$MEDIA_TYPE\" is unrecognized!" && exit 80 ;;
		esac

		if [ -f "$BOOT" ] && [ -s "$BOOT" ]; then
		ADD_OPTS=$(addMedia "$BOOT" "$MEDIA_TYPE" "0" "$BOOT_INDEX" "0x5")
		@@ -543,7 +565,12 @@ DRIVERS="/drivers.iso"
		[ ! -f "$DRIVERS" ] \|\| [ ! -s "$DRIVERS" ] && DRIVERS="$STORAGE/drivers.iso"

		if [ -f "$DRIVERS" ] && [ -s "$DRIVERS" ]; then
		ADD_OPTS=$(addMedia "$DRIVERS" "$MEDIA_TYPE" "1" "" "0x6")
		if [[ "${MACHINE,,}" != "virt" ]] && [[ "${MACHINE,,}" != "pc-i440fx-2"* ]]; then
		DRIVER_TYPE="ide"
		else
		DRIVER_TYPE="auto"
		fi
		ADD_OPTS=$(addMedia "$DRIVERS" "$DRIVER_TYPE" "1" "" "0x6")
		DISK_OPTS+=" $ADD_OPTS"
		fi

src/network.sh

+0 −3

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		@@ -94,13 +94,10 @@ configureDNS() {
		DNSMASQ_OPTS+=" --address=/host.lan/${VM_NET_IP%.*}.1"

		DNSMASQ_OPTS=$(echo "$DNSMASQ_OPTS" \| sed 's/\t/ /g' \| tr -s ' ' \| sed 's/^ *//')
		[[ "$DEBUG" == [Yy1]* ]] && set -x

		if ! $DNSMASQ ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}; then
		error "Failed to start dnsmasq, reason: $?" && exit 29
		fi
		{ set +x; } 2>/dev/null
		[[ "$DEBUG" == [Yy1]* ]] && echo

		return 0
		}

src/proc.sh

+12 −2

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		@@ -40,7 +40,7 @@ if [[ "$KVM" != [Nn]* ]]; then
		warn "you are using Windows 10 which has no KVM support, this will cause a major loss of performance."
		else
		error "KVM acceleration not available $KVM_ERR, this will cause a major loss of performance."
		error "See the FAQ on how to enable it, or continue without KVM by setting KVM=N (not recommended)."
		error "See the FAQ on how to diagnose the cause, or continue without KVM by setting KVM=N (not recommended)."
		[[ "$DEBUG" != [Yy1]* ]] && exit 88
		fi
		fi
		@@ -51,6 +51,7 @@ fi
		if [[ "$KVM" != [Nn]* ]]; then

		CPU_FEATURES="kvm=on,l3-cache=on,+hypervisor"
		CLOCK="/sys/devices/system/clocksource/clocksource0/current_clocksource"
		KVM_OPTS=",accel=kvm -enable-kvm -global kvm-pit.lost_tick_policy=discard"

		if [ -z "$CPU_MODEL" ]; then
		@@ -64,6 +65,15 @@ if [[ "$KVM" != [Nn]* ]]; then
		fi
		fi

		if [ -f "$CLOCK" ]; then
		CLOCK=$(<"$CLOCK")
		if [[ "${CLOCK,,}" != "tsc" ]]; then
		warn "unexpected clocksource: $CLOCK"
		fi
		else
		warn "file \"$CLOCK\" cannot not found?"
		fi

		if grep -qw "svm" <<< "$flags"; then

		# AMD processor