Public bug reported: The Azure datasource currently uses the InstanceID from the SharedConfig.xml file. On our new CRP stack, this ID is not guaranteed to be stable and could change if the VM is deallocated. If the InstanceID changes then cloud-init will attempt to reprovision the VM, which could result in temporary loss of access to the VM.
Instead cloud-init should switch to use the VM Unique ID, which is guaranteed to be stable everywhere for the lifetime of the VM. The VM unique ID is explained here: https://azure.microsoft.com/en-us/blog /accessing-and-using-azure-vm-unique-id/ In short, the unique ID is available via DMI, and can be accessed with the command 'dmidecode | grep UUID' or even easier via sysfs in the file "/sys/devices/virtual/dmi/id/product_uuid". Steve ** Affects: cloud-init (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to cloud-init in Ubuntu. https://bugs.launchpad.net/bugs/1506187 Title: Azure: cloud-init should use VM unique ID To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1506187/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
