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    • Hrvoje Ribicic's avatar
      Add warning against hvparam changes with live migrations · b0d1e392
      Hrvoje Ribicic authored
      
      
      Changing certain hvparams while an instance is running leads to a
      dangerous situation for the instance. When the instance undergoes live
      migration without having undergone a reboot that would have applied the
      parameters, it is setup with the modified hvparams, and loaded with the
      state relying on the old hvparams. Depending on what is used and how,
      this might lead to a crash of the instance.
      
      While a proper fix should go into a stable version of Ganeti as this is
      not a trivial change, the least we can do is warn users that hvparam
      changes may be dangerous.
      Signed-off-by: default avatarHrvoje Ribicic <riba@google.com>
      Reviewed-by: default avatarKlaus Aehlig <aehlig@google.com>
      b0d1e392
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