backup/kvm-master.sh

#!/bin/bash

function get-jobresult {
    method=$1
    vm=$2
    jobid=$3
    if [[ $method == "status" ]]
    then
        jobstatus=$(sudo virsh qemu-agent-command --domain $vm --cmd '{"execute": "guest-exec-status","arguments":{"pid":'$jobid'}}')
        if [[ $jobstatus == *'exited":false'* ]]
        then
            echo "inprogress"
        elif [[ $jobstatus == *'exited":true'* ]]
        then
            echo "complete"
        fi
    elif [[ $method == "output" ]]
    then
        while [[ $stat != "done" ]]
        do
            jobstatus=$(sudo virsh qemu-agent-command --domain $vm --cmd '{"execute": "guest-exec-status","arguments":{"pid":'$jobid'}}')
            if [[ $jobstatus == *'exited":false'* ]]
            then
                sleep 1
            elif [[ $jobstatus == *'exited":true'* ]]
            then
                b64result=$(echo $jobstatus | jq -r '.return' | grep out-data | awk '{print $2}' | sed 's/"//g' | sed 's/,//g')
                echo $(echo $b64result | base64 --decode)
                stat="done"
            else
                echo 'invalid option (get-jobresult $method $qemudomain $pid)'
                stat="done"
            fi
        done
    else
        echo 'invalid method (get-jobresult $method $domain $pid)'
    fi
}

clientscript='
#!/bin/bash
hostname=$(hostname)
rsync -rv / --exclude {"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} simon@172.16.0.103:/mnt/backup/$hostname/
'

vmlist=$(virsh list | grep running | awk '{print $2}')
for vm in $vmlist
do
    response=$(virsh qemu-agent-command --domain $vm --cmd '{"execute": "guest-exec","arguments": {"path": "cat","arg": ["/root/scripts/backup.sh"],"capture-output": true}}')
    pid=$(echo $response | sed 's/:/ /g' | awk '{print $3}' | sed 's/}//g')
    scriptcontent=$(get-jobresult output $vm $pid)
    if [[ $scriptcontent != $clientscript ]]
    then
        handle=$(virsh qemu-agent-command --domain $vm --cmd '{"execute": "guest-file-open","arguments": {"path": "/root/scripts/backup.sh","mode": "w+"}}')
        handle=$(echo $handle | jq -r ".return")
        cmd='{"execute": "guest-file-write","arguments": {"handle": '$handle',"buf-b64": "CiMhL2Jpbi9iYXNoCmhvc3RuYW1lPSQoaG9zdG5hbWUpCnJzeW5jIC1ydiAvIC0tZXhjbHVkZSB7Ii9kZXYvKiIsIi9wcm9jLyoiLCIvc3lzLyoiLCIvdG1wLyoiLCIvcnVuLyoiLCIvbW50LyoiLCIvbWVkaWEvKiIsIi9sb3N0K2ZvdW5kIn0gc2ltb25AMTcyLjE2LjAuMTAzOi9tbnQvYmFja3VwLyRob3N0bmFtZS8K"}}'
        virsh qemu-agent-command --domain $vm --cmd "$cmd"
        cmd='{"execute": "guest-file-close","arguments": {"handle": '$handle'}}'
        virsh qemu-agent-command --domain $vm --cmd $cmd
    fi

    fullcmd='{"execute": "guest-exec","arguments": {"path": "/root/scripts/backup.sh","arg": [""],"capture-output": true}}'
    virsh qemu-agent-command --domain $vm --cmd $fullcmd
done