Get KVM resources with virsh/qemu

get_resources.sh

#!/usr/bin/env sh
set -euo pipefail
IFS=$'\n\t'

INITIATE=$1
HOSTNAME=$2
IP=$3

# Resources used by VMs
DOMIDS=$(virsh -c qemu+ssh://$IP/system list | awk -F' ' '{ print $1 }' | grep -v 'Id\|-')
[ $INITIATE -eq 1 ] && touch used_resources.csv
[ $INITIATE -eq 1 ] && echo "host,guest,vcpu,mem" > used_resources.csv
for i in ${DOMIDS[@]}
do
    virsh -c qemu+ssh://$IP/system dominfo $i | \
        awk -F':' '{gsub(/^[ \t]+/, "", $2); print $2 }' | \
        awk -v HOSTNAME="$HOSTNAME" 'BEGIN { RS = "" ; FS = "\n" }
             {gsub(/ KiB/,"",$8); print HOSTNAME","$2","$6","$8/1024/1024 }' >> used_resources.csv
done
#sed -i -e '2,$s/^/'"$HOSTNAME"',/' used_resources.csv

# Resources available on host
[ $INITIATE -eq 1 ] && touch available_resources.csv
[ $INITIATE -eq 1 ] && echo "host,vcpu,mem" > available_resources.csv
virsh -c qemu+ssh://$IP/system nodeinfo | \
    awk -F':' '{gsub(/^[ \t]+/, "", $2); print $2 }' | \
    awk -v HOSTNAME="$HOSTNAME" 'BEGIN { RS ="" ; FS = "\n" }
         {gsub(/ KiB/,"", $8); print HOSTNAME","$2","$8/1024/1024 }' >> available_resources.csv
#sed -i -e '2,$s/^/'"$HOSTNAME"',/' available_resources.csv