openstack
/
cinder
Code Issues Proposed changes

Added information how to use JsonFilter 

Creating a query hint to use JsonFilter that will choose
required backed to create a volume was complicated.
Added description how to use that will be helpful for others.

Change-Id: If04f037cf55b5b9d116927aa4b23a9c42d7b53e6
Co-authored-by: Bartosz Rabiega <bartosz.rabiega@corp.ovh.com>
This commit is contained in:
Daniel Pawlik 2019-08-28 06:52:55 +00:00 committed by Rajat Dhasmana
parent ff96402263
commit e032855287
1 changed files with 8 additions and 1 deletions
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9
cinder/scheduler/filters/json_filter.py
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@ -22,7 +22,14 @@ from cinder.scheduler import filters
class JsonFilter(filters.BaseBackendFilter):
"""Backend filter for simple JSON-based grammar for selecting backends."""
"""Backend filter for simple JSON-based grammar for selecting backends.
If you want to choose one of your backend,
make a query hint, for example:
cinder create --hint query='["=", "$backend_id", "rbd:vol@ceph#cloud"]'
"""
def _op_compare(self, args, op):
"""Compare first item of args with the rest using specified operator.