openstack/neutron
Code Issues Proposed changes
4b52b123d3
neutron/doc/source/contributor/testing/db_transient_failure_injection.rst
Akihiro Motoki 2a47ffd96d Rearrange existing documentation to fit the new standard layout 
For more detail, see the doc migration spec.
http://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html

Change-Id: I142a686a3abbe65138a9f3296cd21fc21fbd763a
2017-07-08 05:49:56 +00:00

1.6 KiB
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Transient DB Failure Injection

Neutron has a service plugin to inject random delays and Deadlock exceptions into normal Neutron operations. The service plugin is called 'Loki' and is located under neutron.services.loki.loki_plugin.

To enable the plugin, just add 'loki' to the list of service_plugins in your neutron-server neutron.conf file.

The plugin will inject a Deadlock exception on database flushes with a 1/50 probability and a delay of 1 second with a 1/200 probability when SQLAlchemy objects are loaded into the persistent state from the DB. The goal is to ensure the code is tolerant of these transient delays/failures that will be experienced in busy production (and Galera) systems.