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doc-exports/docs/bms/umn/en-us_topic_0053536930.html
Zaoxu, Li 1655d41c64 bms_umn_0208 
Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Co-authored-by: Zaoxu, Li <lizaoxu@huawei.com>
Co-committed-by: Zaoxu, Li <lizaoxu@huawei.com>
2024-09-20 14:27:56 +00:00

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What Restrictions Are There on BMS Use?

  • External hardware devices (such as USB devices, bank USB keys, external hard disks, and dongles) cannot be loaded.
  • Live migration is not supported. If a BMS is faulty, your services running on it may be affected. It is good practice to deploy your services in a cluster or in primary/standby mode to ensure high availability.
  • You cannot create a server without an OS, that is, a BMS must have an OS.
  • After a BMS is created, you cannot change its VPC.
  • Virtualization software cannot be installed on a BMS.
  • When you create a BMS, you can only select a flavor with specified CPU, memory, and local disks but cannot configure them separately. After a BMS is created, you can expand the capacity of attached EVS disks but cannot modify the BMS CPU, memory, or local disks.
  • You can only attach EVS disks whose device type is SCSI to a BMS.
  • You cannot attach EVS disks to BMSs of certain flavors or BMSs created from certain images because these BMSs do not have SDI iNICs or lack compatibility.
  • Do not delete or modify built-in plug-ins of an image, such as Cloud-Init and bms-network-config. Otherwise, basic BMS functions may be unavailable.
  • If you choose to assign an IP address automatically when you create a BMS, do not change the private IP address of the BMS after the BMS is provisioned. Otherwise, the IP address may conflict with that of another BMS.
  • BMSs do not support bridge NICs because they will cause network interruptions.
  • Do not upgrade the OS kernel. Otherwise, the hardware driver may become incompatible with the BMS and adversely affect the BMS reliability.
Parent topic: General FAQ