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