70 lines
1.5 KiB
Bash
Executable File
70 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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set -e
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# main available options:
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# QEMU_CPU=n (cores)
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# QEMU_RAM=nnn (megabytes)
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# QEMU_HDA (filename)
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# QEMU_HDA_SIZE (bytes, suffixes like "G" allowed)
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# QEMU_CDROM (filename)
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# QEMU_BOOT (-boot)
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# QEMU_PORTS="xxx[ xxx ...]" (space separated port numbers)
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hostArch="$(uname -m)"
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qemuArch="${QEMU_ARCH:-$hostArch}"
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qemu="${QEMU_BIN:-qemu-system-$qemuArch}"
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qemuArgs=()
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qemuPorts=( 22 $QEMU_PORTS )
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if [ -e /dev/kvm ]; then
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qemuArgs+=( -enable-kvm )
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elif [ "$hostArch" = "$qemuArch" ]; then
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echo >&2
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echo >&2 'warning: /dev/kvm not found'
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echo >&2 ' PERFORMANCE WILL SUFFER'
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echo >&2 ' (hint: docker run --device /dev/kvm ...)'
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echo >&2
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sleep 3
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fi
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qemuArgs+=( -smp "${QEMU_CPU:-1}" )
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qemuArgs+=( -m "${QEMU_RAM:-512}" )
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if [ "$QEMU_HDA" ]; then
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if [ ! -f "$QEMU_HDA" -o ! -s "$QEMU_HDA" ]; then
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(
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set -x
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qemu-img create -f qcow2 -o preallocation=off "$QEMU_HDA" "${QEMU_HDA_SIZE:-8G}"
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)
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fi
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# http://wiki.qemu.org/download/qemu-doc.html#Invocation
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#qemuArgs+=( -hda "$QEMU_HDA" )
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qemuArgs+=( -drive file="$QEMU_HDA",index=0,media=disk,discard=unmap )
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fi
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if [ "$QEMU_CDROM" ]; then
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qemuArgs+=( -cdrom "$QEMU_CDROM" )
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fi
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if [ "$QEMU_BOOT" ]; then
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qemuArgs+=( -boot "$QEMU_BOOT" )
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fi
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netArg='user'
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netArg+=",hostname=$(hostname)"
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for port in "${qemuPorts[@]}"; do
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netArg+=",hostfwd=tcp::$port-:$port"
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netArg+=",hostfwd=udp::$port-:$port"
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done
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qemuArgs+=(
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-net nic
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-net "$netArg"
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-vnc ':0'
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-serial stdio
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"$@"
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)
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set -x
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exec "$qemu" "${qemuArgs[@]}"
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