ac29ea216f
As per the new structure of community-wide goal[1], we will keep all the completed goals into separate directory 'goals/completed/' which will help to track the goals and a clear view on what all goals still need more work. Keeping 'Migrate from oslo.rootwrap to oslo.privsep' goal in the selected directory only as this still need to finish the work. Rest all previous cycle goals are moved to 'goals/completed/' directory [1] https://governance.openstack.org/tc/goals/#completing-goals Change-Id: I6c0d979038f65abb091db646ddb4c0d09c43735a
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.. -*- mode: rst -*-
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============================
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Enable mutable configuration
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============================
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There is a strong desire from operators to be able to change configuration
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options without a service restart. For example, to selectively enable DEBUG
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logging in response to observed issues. As of OpenStack Newton, config
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options can be marked as 'mutable'. This means they can be reloaded (usually
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via SIGHUP) at runtime, without a service restart. However, each project has
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to be enabled before this will work and some care needs to be taken over how
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each option is used before it can safely be marked mutable. For more details
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please refer to `Enabling your project for mutable config`_
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Champion
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========
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Goals need a main driver to project-manage them to completion. Project teams
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need assistance, reminders and sometimes direct help in order for them to
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complete the goals.
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ChangBo Guo (gcb) has volunteered to drive this goal.
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Gerrit Topic
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============
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To facilitate tracking, commits related to this goal should use the
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gerrit topic::
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mutable-config
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Storyboard
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==========
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Progress on this goal is tracked via
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https://storyboard.openstack.org/#!/story/2001545
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Completion Criteria
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===================
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Each project service could be turned on/off debug logging without restart
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#. Support reloading configuration options at runtime, without a service
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restart
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#. Toggle the debug option for each service at runtime
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References
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==========
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* `Original Discussion`_
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* `Enabling your project for mutable config`_
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* `Example of enabling projects`_
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.. _Original Discussion: https://etherpad.openstack.org/p/mitaka-cross-project-dynamic-config-services
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.. _Enabling your project for mutable config: https://docs.openstack.org/oslo.config/latest/reference/mutable.html
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.. _Example of enabling projects: https://review.opendev.org/#/q/topic:bp/mutable-config+(status:open+OR+status:merged)
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Current State / Anticipated Impact
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==================================
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oslo.config and oslo.service have implemented basic functions and we have
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enabled Nova to support mutable configuration and mark some configuration
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option like CONF.libvirt.live_migration_progress_timeout as 'mutable'.
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