yahoo-eng-team team mailing list archive

["Markus Zoeller \(markus_z\)" <mzoeller@xxxxxxxxxx>]

This wishlist bug has been open a year without any activity. I'm going
to move it to "Opinion / Wishlist", which is an easily-obtainable queue
of older requests that have come on. If you decide to work on this
consider using a blueprint [1] (with spec [2]). I'll recommend to 
read [3] if not yet done. 

If there are any questions left, feel free to contact me (markus_z)
in the IRC channel #openstack-nova

References:
[1] https://blueprints.launchpad.net/nova/
[2] https://github.com/openstack/nova-specs
[3] https://wiki.openstack.org/wiki/Blueprints

** Changed in: nova
       Status: Confirmed => Opinion

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https://bugs.launchpad.net/bugs/1101839

Title:
  Don't use the local compute time when syncing

Status in OpenStack Compute (nova):
  Opinion

Bug description:
  Right now there is a strong tendency to rely on NTP for determining if
  services are up or down, especially compute nodes. This has been
  problematic since it is very fragile in its implementation (aka when
  NTP gets slightly out of sync on any compute node then that compute
  node will no longer be useable). It seems simpler to let the database
  decide what is "time" using its own internal functions like NOW() and
  such and not worry about time being in sync on the other nodes...

  Examples of this:

  https://github.com/openstack/nova/blob/master/nova/db/sqlalchemy/api.py#L502
  (note the time is from the caller, not from the db)... and
  https://github.com/openstack/nova/blob/master/nova/compute/resource_tracker.py#L276

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