GitLab

Now that mandatory opcode fields are mandatory also on disk,
document that, once we use soft drains during upgrades, the disk
representation of the job queue needs to be updated by cfgupgrade
as well.
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>

Instead of using a separate binary, add the upgrade
functionality to gnt-cluster.
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Update the upgrade design document according to the outcome
of the design discussion at GanetiCon 2013. There are two
changes in the design.

* As revision upgrades are binary compatible at all levels,
  one can accept a rough upgrade, just replacing the binaries.
  Therefore, it will become a configure option whether version
  includes revision and suffix, or not.

* The install/uninstall scripts are replaced in favor of another
  level of indirection. In this way, at run time, only two symlinks
  in ${sysconfdir}/ganeti, will be changed, whereas links under
  ${PREFIX}/bin, ${PREFIX}/sbin, and similar, are not touched by
  ganeti itself.

* The layout for the ganeti python libraries, which do not provide
  stable interface, are changed to be used as private modules.
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Apollon Oikonomopoulos <apoikos@gmail.com>
Reviewed-by: Michele Tartara <mtartara@google.com>

Even though the ${PREFIX}/opt/ only came into the design in the review
process, it is not the best choice, as /opt is reserverd for manually
installed software, but Ganeti intends to be packaged. Use ${libdir}
instead, defaulting to ${PREFIX}/lib.
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

This design document describes how upgrade and downgrades
can be made more automatic for future versions.
Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>