Little late, but I created a Odoo grok filter for logstash: https://gist.github.com/hofrob/6383dd464747d0cc6f90

Requests are captured in detail. All the other messages (after the module name) get put into the "misc" field since there doesn't seem to be any convention.

I have a solution for sentry that should be easy to change for logstash. 

It uses your system's Syslog handler (it assumes you are using rsyslog), and forwards OpenERP v7 messages to a custom handler that finally does the sentry logging.

You can find it here https://gist.github.com/nagyv/398b0f9d0cb4061b6068