qemu

#!/bin/bash

# Copy this file to /etc/libvirt/hooks, make sure it's called "qemu".
# After this file is installed, restart libvirt.
# From now on, you can easily add per-guest qemu hooks.
# Add your hooks in /etc/libvirt/hooks/qemu.d/vm_name/hook_name/state_name.
# For a list of available hooks, please refer to https://www.libvirt.org/hooks.html

set -eu
set -o pipefail
shopt -s nullglob

if [[ -e /.vmdebug ]]; then
    exit 0
fi

GUEST_NAME="$1"
HOOK_NAME="$2"
STATE_NAME="$3"
MISC="${@:4}"

BASEDIR="$(dirname $0)"

HOOKPATH="$BASEDIR/qemu.d/$GUEST_NAME/$HOOK_NAME/$STATE_NAME"
LOGPATH="/var/log/libvirt/qemu/${GUEST_NAME}_${HOOK_NAME}_${STATE_NAME}.log"

log() {
    echo "$@" | tee "$LOGPATH"
}

clear_log() {
    echo "" > "$LOGPATH"
}

run_hook() {
    HOOK="$1"

    if [[ -f "$HOOK" ]] && [[ -x "$HOOK" ]]; then
        log "Info: Executing hook: $HOOK"
        "$HOOK" 2>&1 | tee "$LOGPATH"
    else
        log "Warning: found non-executable hook: $HOOK. Ignoring."
    fi
}


# Run hook(s)
if [[ -f "$HOOKPATH" ]]; then
   clear_log
   run_hook "$HOOKPATH"
elif [[ -d "$HOOKPATH" ]]; then
    clear_log
    for hook in "$HOOKPATH"/*; do
        run_hook "$hook"
    done
else
    log "Warning: $HOOKPATH is neither a file nor a directory. Ignoring."
fi