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[Bug 1805233] [NEW] Compute schedulers in nova - weights section is out of date

 

Public bug reported:

- [x] This doc is inaccurate in this way:

This bug is specifically about the weights section here:

https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#weights

There are a few issues:

1. Mentioning cells in here is not qualified as only for cells v1, which
is deprecated. We should either note that the mention of cells weights
in that section are for cells v1, or just remove them to avoid
confusion.

2. The "Host weighting options" section lists several options with their
now deprecated config option group:

https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#id15

For example, ram_weight_multiplier is now in the [filter_scheduler]
group rather than the [DEFAULT] group. We should fix the groups and link
to the actual config option docs using the
:oslo.config:option:`<group.name>`_ formatting (or just replace the
table with descriptions to a list of related options) - or just drop the
table and for each option, document it in the section about the
filter/weigher that actually uses that option so there is context.

3. We should probably link to https://docs.openstack.org/nova/rocky/user
/filter-scheduler.html#weights which actually explains the various in-
tree weighers.

-----------------------------------
Release: 18.0.4.dev13 on 2018-11-24 17:12
SHA: 5d9dd1f63fe940479cfa43afffc369eb8e586050
Source: https://git.openstack.org/cgit/openstack/nova/tree/doc/source/admin/configuration/schedulers.rst
URL: https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html

** Affects: nova
     Importance: Medium
         Status: Triaged


** Tags: docs scheduler

** Description changed:

- - [ ] This doc is inaccurate in this way:
+ - [x] This doc is inaccurate in this way:
  
  This bug is specifically about the weights section here:
  
  https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#weights
  
  There are a few issues:
  
  1. Mentioning cells in here is not qualified as only for cells v1, which
  is deprecated. We should either note that the mention of cells weights
  in that section are for cells v1, or just remove them to avoid
  confusion.
  
  2. The "Host weighting options" section lists several options with their
  now deprecated config option group:
  
  https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#id15
  
  For example, ram_weight_multiplier is now in the [filter_scheduler]
  group rather than the [DEFAULT] group. We should fix the groups and link
  to the actual config option docs using the
  :oslo.config:option:`<group.name>`_ formatting (or just replace the
  table with descriptions to a list of related options) - or just drop the
  table and for each option, document it in the section about the
  filter/weigher that actually uses that option so there is context.
  
  3. We should probably link to https://docs.openstack.org/nova/rocky/user
  /filter-scheduler.html#weights which actually explains the various in-
  tree weighers.
  
  -----------------------------------
  Release: 18.0.4.dev13 on 2018-11-24 17:12
  SHA: 5d9dd1f63fe940479cfa43afffc369eb8e586050
  Source: https://git.openstack.org/cgit/openstack/nova/tree/doc/source/admin/configuration/schedulers.rst
  URL: https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html

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https://bugs.launchpad.net/bugs/1805233

Title:
  Compute schedulers in nova - weights section is out of date

Status in OpenStack Compute (nova):
  Triaged

Bug description:
  - [x] This doc is inaccurate in this way:

  This bug is specifically about the weights section here:

  https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#weights

  There are a few issues:

  1. Mentioning cells in here is not qualified as only for cells v1,
  which is deprecated. We should either note that the mention of cells
  weights in that section are for cells v1, or just remove them to avoid
  confusion.

  2. The "Host weighting options" section lists several options with
  their now deprecated config option group:

  https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html#id15

  For example, ram_weight_multiplier is now in the [filter_scheduler]
  group rather than the [DEFAULT] group. We should fix the groups and
  link to the actual config option docs using the
  :oslo.config:option:`<group.name>`_ formatting (or just replace the
  table with descriptions to a list of related options) - or just drop
  the table and for each option, document it in the section about the
  filter/weigher that actually uses that option so there is context.

  3. We should probably link to
  https://docs.openstack.org/nova/rocky/user/filter-
  scheduler.html#weights which actually explains the various in-tree
  weighers.

  -----------------------------------
  Release: 18.0.4.dev13 on 2018-11-24 17:12
  SHA: 5d9dd1f63fe940479cfa43afffc369eb8e586050
  Source: https://git.openstack.org/cgit/openstack/nova/tree/doc/source/admin/configuration/schedulers.rst
  URL: https://docs.openstack.org/nova/rocky/admin/configuration/schedulers.html

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