cinder-volume: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/cinder-volume - from package: cinder-volume

You may install the required package with command apt-get install {package}

Error in other languages:
cinder-volume: bevel nie gevind nie
cinder-volume: comandă negăsită
cinder-volume: comando não encontrado
cinder-volume: commande introuvable
cinder-volume: command not found
cinder-volume: käsku ei ole
cinder-volume: không tìm thấy lệnh
cinder-volume: komanda nerasta
cinder-volume: Kommando nicht gefunden.
cinder-volume: kommandot finns inte
cinder-volume: komut yok
cinder-volume: nie znaleziono polecenia
cinder-volume: níor aimsíodh an t-ordú
cinder-volume: no se encontró la orden
cinder-volume: no s'ha trobat l'ordre
cinder-volume: opdracht niet gevonden
cinder-volume: parancs nem található
cinder-volume: perintah tidak ditemukan
cinder-volume: príkaz nenájdený
cinder-volume: příkaz nenalezen
cinder-volume: команда не найдена
cinder-volume: командата не е открита
cinder-volume: 命令找不到
cinder-volume: コマンドが見つかりません