Création d'un volume

gcloud compute disks create nextcloud-app-static-pv --zone europe-west1-b --size=500Gb 
gcloud compute disks create nextcloud-db-static-pv --zone europe-west1-b --size=10Gb

Attacher une instance

gcloud compute instances attach-disk  gke-integration-default-pool-ea501286-hpww --disk nextcloud-app-static-pv

Initialisation du disque

gcloud compute ssh [INSTANCE_NAME]
lsblk
mkfs.ext4 /dev/sdXXXX