132f377e85
Scan the ceilometer specs repository. Filter the result and fix the mistakes. Change-Id: Idfbc41c3b681aa57cd5153dffc2dae600a58efb9
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155 lines
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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===============================
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Only support sqlalchemy in Aodh
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===============================
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https://blueprints.launchpad.net/ceilometer/+spec/only-support-sqlalchemy-in-aodh
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This change want to deprecate others storage backends (mongodb, hbase) except
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sql and remove them in future O* cycle, because sql is totally competent for
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alarm data and we don't need to maintain multiple storage backend.
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Problem description
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===================
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We support multiple storage drivers(habase, mongodb, sqlalchemy) in
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Ceilometer, that is mainly for the recording/query of performance based massive
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metric data. Aodh continue those drivers after alarming service splitting, but
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Aodh only has alarm related data which unlikely be a large number and sql can
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well meet the requirement.
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Most of other projects in OpenStack only use sql as database. So we don't need
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to keep the hbase and mongodb support in Aodh. The advantages of removing the
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hbase and mongodb support are:
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* make the code of Aodh more clean that reduce the maintenance works of storage
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drivers and related tests.
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* focus on the functionality and avoid considering multiple drivers support if
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new features coming.
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Proposed change
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===============
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Deprecate mongodb/Hbase support firstly and remove them in future cycle.
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In current cycle:
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* deprecate mongodb and Hbase storage support and log warning messages if
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config mongodb or Hbase as storage driver
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* add alarm data migration tool for migrating data from mongodb/Hbase to sql
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In future O* cycle:
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* remove the mongodb storage implementation
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* remove the hbase storage implementation
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* remove the mongodb and hbase related tests
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* remove the gate jobs based on mongodb and hbase
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Alternatives
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------------
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None.
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Data model impact
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-----------------
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None.
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REST API impact
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---------------
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None.
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Security impact
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---------------
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None.
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Pipeline impact
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---------------
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None
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Other end user impact
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---------------------
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None
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Performance/Scalability Impacts
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-------------------------------
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None
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Other deployer impact
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---------------------
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mongodb or Hbase as storage driver will be not recommended in deployment.
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Developer impact
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----------------
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Developers will be happy, they won't need to consider mongodb and Hbase storage
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support and related tests.
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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liusheng
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Ongoing maintainer:
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None
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Work Items
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----------
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In current cycle:
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* send an email to do a user survey to get feedbacks about this change
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* deprecate mongodb and Hbase storage support and log warning messages if
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config mongodb or Hbase as storage driver
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* add alarm data migration tool for migrating data from mongodb/Hbase to sql
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In future O* cycle:
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* remove the mongodb storage implementation
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* remove the hbase storage implementation
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* remove the mongodb and hbase related tests
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* remove the gate jobs based on mongodb and hbase
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* update the related docs
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Future lifecycle
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================
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None
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Dependencies
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============
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None
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Testing
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=======
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None
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Documentation Impact
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====================
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Update the documentation about these changes.
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References
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==========
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https://blueprints.launchpad.net/ceilometer/+spec/only-support-sqlalchemy-in-aodh
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