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https://github.com/vdsm/virtual-dsm.git
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b65d7b11c2
NOTE: This only works on fresh installs. If you want to convert an existing installation to use this feature, you need to update /usr/local/bin/agent.sh on the guest and /storage/agent.ver on the host.
69 lines
1.8 KiB
Bash
69 lines
1.8 KiB
Bash
#!/usr/bin/env bash
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set -eu
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# Configure QEMU for graceful shutdown
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QEMU_MONPORT=7100
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QEMU_POWERDOWN_TIMEOUT=30
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_QEMU_PID=/run/qemu.pid
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_QEMU_SHUTDOWN_COUNTER=/run/qemu.counter
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# Allows for troubleshooting signals sent to the process
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_trap(){
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func="$1" ; shift
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for sig ; do
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trap "$func $sig" "$sig"
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done
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}
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_graceful_shutdown(){
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local QEMU_MONPORT="${QEMU_MONPORT:-7100}"
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local QEMU_POWERDOWN_TIMEOUT="${QEMU_POWERDOWN_TIMEOUT:-120}"
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set +e
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echo "Trapped $1 signal"
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echo 0 > "${_QEMU_SHUTDOWN_COUNTER}"
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FILE="${IMG}/agent.ver"
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if [ ! -f "$FILE" ]; then
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AGENT_VERSION="1"
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echo "$AGENT_VERSION" > "$IMG"/agent.ver
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else
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AGENT_VERSION=$(cat "${FILE}")
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fi
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# Don't send the powerdown signal because Synology ignores it
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# echo 'system_powerdown' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null
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if (($AGENT_VERSION < 2)); then
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echo "Please update the agent to allow gracefull shutdowns..."
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pkill -f qemu-system-x86_64
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else
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# Send a NMI interrupt which will be detected by the agent
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echo 'nmi' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null
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fi
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while [ "$(cat ${_QEMU_SHUTDOWN_COUNTER})" -lt "${QEMU_POWERDOWN_TIMEOUT}" ]; do
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# Increase the counter
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echo $(($(cat ${_QEMU_SHUTDOWN_COUNTER})+1)) > ${_QEMU_SHUTDOWN_COUNTER}
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# Try to connect to qemu
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if echo 'info version'| nc -q 1 -w 1 localhost "${QEMU_MONPORT:-7100}">/dev/null; then
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sleep 1
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#echo "Shutting down, waiting... ($(cat ${_QEMU_SHUTDOWN_COUNTER})/${QEMU_POWERDOWN_TIMEOUT})"
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fi
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done
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echo 'quit' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}">/dev/null || true
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return
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}
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_trap _graceful_shutdown SIGTERM SIGHUP SIGINT SIGABRT SIGQUIT
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KVM_MON_OPTS="-monitor telnet:localhost:${QEMU_MONPORT:-7100},server,nowait,nodelay"
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