Voir :

• https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/6/html/virtualization_administration_guide/sect-virtualization-tips_and_tricks-libvirt_managed_timers
• https://docs.aws.amazon.com/fr_fr/filegateway/latest/filefsxw/MaintenanceTimeSync-fgw.html
• https://docs.aws.amazon.com/fr_fr/AWSEC2/latest/UserGuide/set-time.html
• libvirt-guests https://serverfault.com/questions/334698/how-to-keep-time-on-resumed-kvm-guest-with-libvirt
• https://docs.aws.amazon.com/fr_fr/filegateway/latest/filefsxw/GettingStartedSyncVMTime-common.html
• https://docs.aws.amazon.com/fr_fr/filegateway/latest/filefsxw/MaintenanceTimeSync-hyperv.html
• https://www.vmware.com/docs/vmware_timekeeping

(Linux uniquement) via une connexion PTP directe pour se connecter à une horloge matérielle PTP locale :

• PHC0

Source : https://docs.aws.amazon.com/fr_fr/AWSEC2/latest/UserGuide/configure-ec2-ntp.html