openstack
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glance-specs
Code Issues Proposed changes

Move non-prioritized Pike specs to 'untargeted' 

Following discussion at the Glance virtual midcycle meeting, specs
that were approved for Pike but whose owners are no longer available
to work on them are to be moved to an 'untargeted' directory.

Change-Id: I6da5d9ec49e60609173456456bb8635ada6dbdd2
This commit is contained in:
Brian Rosmaita 2017-05-31 20:50:44 -04:00
parent 77a7519479
commit 092f61e9f4
4 changed files with 59 additions and 66 deletions
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61
specs/pike/approved/glance/lite-specs.rst
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@ -65,67 +65,6 @@ Community Goal: Control Plane API endpoints deployment via WSGI
End of `Community Goal: Control Plane API endpoints deployment via WSGI`
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Introduce db sync --check feature
---------------------------------
:problem: It is very hard for automation of deploy and upgrade operations to
know if there are db migrations pending. It requires the automation
to know what the latest version is, and compare that to the output
of a command to check the current version, then interpret the
potential difference somehow.
:solution: Similar to the linked feature added to Keystone's manage command,
Glance should support an operation which enumerates any outstanding
db upgrade operations and provide a distinct return code based on
that status. Each expand, migrate, and contract operation required
to upgrade the db should be listed in the proper order of execution
in the response. For consistency with Keystone, this may be
implemented by using a ``--check`` option. When this option is
present no db upgrades would be performed but potential operations
would be reported, acting similar to the pattern of a dry-run.
:impacts: Introduces new option to the db sync operation in glance-manage.
:timeline: Expected to be merged within the Pike time frame.
:link: https://bugs.launchpad.net/keystone/+bug/1642212
:assignee: Open
End of `Introduce db sync --check feature`
++++++++++++++++++++++++++++++++++++++++++
Introduce Glance Taskflow stopfile feature
------------------------------------------
:problem: When preparing to take a Glance node down for maintenance or upgrade
it is necessary to allow long-running operations to complete without
allowing new operations to begin. The Taskflow engine does not have
the capability to prevent individual executors from starting new
jobs, and so attempting to take a Glance node out of the Taskflow
processing pool risks a race condition with that executor starting a
job just before the service is terminated which could cause the Task
processing to fail.
:solution: Introduce a disable_by_file_path feature to Glance Taskflow which
will prevent the node from picking up new jobs. This allows an
operator or automation engine to ``touch`` the appropriate file
before terminating the service. This feature should depend on the
oslo healthcheck middleware configuration to disable the taskflow
engine. As an additional impact, this work will require Glance to
instantiate a single taskflow engine as a singleton and reuse that
engine instance on all subsequent taskflow operations.
:impacts: None
:timeline: Expected to have a fix merged in the Pike cycle before milestone 2.
:link: https://docs.openstack.org/developer/oslo.middleware/healthcheck_plugins.html
:assignee: Open
End of `Introduce Glance Taskflow stopfile feature`
+++++++++++++++++++++++++++++++++++++++++++++++++++
Add your Spec Lite before this line
===================================

26
specs/untargeted/glance/lite-spec-db-sync-check.rst Normal file
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@ -0,0 +1,26 @@
Lite Spec: Introduce db sync --check feature
--------------------------------------------
:problem: It is very hard for automation of deploy and upgrade operations to
know if there are db migrations pending. It requires the automation
to know what the latest version is, and compare that to the output
of a command to check the current version, then interpret the
potential difference somehow.
:solution: Similar to the linked feature added to Keystone's manage command,
Glance should support an operation which enumerates any outstanding
db upgrade operations and provide a distinct return code based on
that status. Each expand, migrate, and contract operation required
to upgrade the db should be listed in the proper order of execution
in the response. For consistency with Keystone, this may be
implemented by using a ``--check`` option. When this option is
present no db upgrades would be performed but potential operations
would be reported, acting similar to the pattern of a dry-run.
:impacts: Introduces new option to the db sync operation in glance-manage.
:timeline: Expected to be merged within the Pike time frame.
:link: https://bugs.launchpad.net/keystone/+bug/1642212
:assignee: Open

28
specs/untargeted/glance/lite-spec-task-stopfile.rst Normal file
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@ -0,0 +1,28 @@
Lite Spec: Introduce Glance Taskflow stopfile feature
-----------------------------------------------------
:problem: When preparing to take a Glance node down for maintenance or upgrade
it is necessary to allow long-running operations to complete without
allowing new operations to begin. The Taskflow engine does not have
the capability to prevent individual executors from starting new
jobs, and so attempting to take a Glance node out of the Taskflow
processing pool risks a race condition with that executor starting a
job just before the service is terminated which could cause the Task
processing to fail.
:solution: Introduce a disable_by_file_path feature to Glance Taskflow which
will prevent the node from picking up new jobs. This allows an
operator or automation engine to ``touch`` the appropriate file
before terminating the service. This feature should depend on the
oslo healthcheck middleware configuration to disable the taskflow
engine. As an additional impact, this work will require Glance to
instantiate a single taskflow engine as a singleton and reuse that
engine instance on all subsequent taskflow operations.
:impacts: None
:timeline: Expected to have a fix merged in the Pike cycle before milestone 2.
:link: https://docs.openstack.org/developer/oslo.middleware/healthcheck_plugins.html
:assignee: Open

10
specs/untargeted/index.rst
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@ -18,13 +18,13 @@ on implementing one of these specs.
:glob:
:maxdepth: 1
.. Approved untargeted specs for Glance:
Approved untargeted specs for Glance:
.. .. toctree::
.. :glob:
.. :maxdepth: 1
.. toctree::
:glob:
:maxdepth: 1
.. glance/*
glance/*
.. Approved untargeted specs for glance_store: