[goal] Deprecate the JSON formatted policy file

As per the community goal of migrating the policy file
the format from JSON to YAML[1], we need to do two things:

1. Change the default value of '[oslo_policy] policy_file''
config option from 'policy.json' to 'policy.yaml' with
upgrade checks.

2. Deprecate the JSON formatted policy file on the project side
via warning in doc and releasenotes.

Also replace policy.json to policy.yaml ref from doc and tests.

[1]https://governance.openstack.org/tc/goals/selected/wallaby/migrate-policy-format-from-json-to-yaml.html

Change-Id: Ibb26169656785330e7d86a362fd110222fb63a07

lower-constraints.txt

@@ -24,12 +24,12 @@ netaddr==0.7.20
 netifaces==0.10.4
 os-client-config==1.28.0
 os-testr==1.0.0
-oslo.config==5.2.0
-oslo.context==2.19.2
+oslo.config==6.8.0
+oslo.context==2.22.0
 oslo.i18n==3.15.3
-oslo.policy==1.30.0
+oslo.policy==3.6.0
 oslo.serialization==2.18.0
-oslo.utils==3.33.0
+oslo.utils==4.5.0
 oslotest==3.2.0
 pbr==2.0.0
 PyMySQL==0.8.0
@@ -37,11 +37,11 @@ pyparsing==2.1.0
 python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
-PyYAML==3.13
-requests==2.14.2
+PyYAML==5.1
+requests==2.20.0
 requests-mock==1.2.0
 requestsexceptions==1.2.0
-rfc3986==0.3.1
+rfc3986==1.2.0
 simplejson==3.13.2
 smmap==0.9.0
 stestr==1.0.0

monasca_common/policy/policy_engine.py

@@ -22,6 +22,7 @@ import sys
 
 import logging
 from oslo_config import cfg
+from oslo_policy import opts
 from oslo_policy import policy
 
 from monasca_common.policy.i18n import _LW
@@ -41,6 +42,13 @@ _ENFORCER = None
 saved_file_rules = []
 
 
+# TODO(gmann): Remove setting the default value of config policy_file
+# once oslo_policy change the default value to 'policy.yaml'.
+# https://github.com/openstack/oslo.policy/blob/a626ad12fe5a3abd49d70e3e5b95589d279ab578/oslo_policy/opts.py#L49
+DEFAULT_POLICY_FILE = 'policy.yaml'
+opts.set_defaults(cfg.CONF, DEFAULT_POLICY_FILE)
+
+
 def reset():
     """Reset Enforcer class."""
     global _ENFORCER

releasenotes/notes/deprecate-json-formatted-policy-file-dca87c0913f20f09.yaml

@@ -0,0 +1,20 @@
+---
+upgrade:
+  - |
+    The default value of ``[oslo_policy] policy_file`` config option has
+    been changed from ``policy.json`` to ``policy.yaml``.
+    Operators who are utilizing customized or previously generated
+    static policy JSON files (which are not needed by default), should
+    generate new policy files or convert them in YAML format. Use the
+    `oslopolicy-convert-json-to-yaml
+    <https://docs.openstack.org/oslo.policy/latest/cli/oslopolicy-convert-json-to-yaml.html>`_
+    tool to convert a JSON to YAML formatted policy file in
+    backward compatible way.
+deprecations:
+  - |
+    Use of JSON policy files was deprecated by the ``oslo.policy`` library
+    during the Victoria development cycle. As a result, this deprecation is
+    being noted in the Wallaby cycle with an anticipated future removal of support
+    by ``oslo.policy``. As such operators will need to convert to YAML policy
+    files. Please see the upgrade notes for details on migration of any
+    custom policy files.

requirements.txt

@@ -3,8 +3,8 @@
 # process, which may cause wedges in the gate later.
 kazoo>=2.8.0 # Apache-2.0
 PyMySQL>=0.8.0 # MIT License
-oslo.config>=5.2.0 # Apache-2.0
-oslo.policy>=1.30.0 # Apache-2.0
+oslo.config>=6.8.0 # Apache-2.0
+oslo.policy>=3.6.0 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 pyparsing>=2.1.0 # MIT
 simplejson>=3.13.2 # MIT

test-requirements.txt

@@ -8,7 +8,7 @@ Babel!=2.4.0,>=2.3.4 # BSD
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 httplib2>=0.9.1 # MIT
-oslo.context>=2.19.2 # Apache-2.0
+oslo.context>=2.22.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0