305e41f47b
This might be necessary for future vesions of Neutron OVS agent. 1. The agent parses options, including command line options, using oslo.config.cfg.CONF ConfigOpt instance. 2. Depending on options, it might lazily import ryu modules. 3. The ryu modules might have import-time register_cli_opts calls against ryu.cfg.CONF. 3. As ryu.cfg.CONF is same as oslo.config.cfg.CONF, oslo.config raises an exception, complaining register_cli_opts is used after parsing command line options. Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
# Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
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# Copyright (C) 2014 YAMAMOTO Takashi <yamamoto at valinux co jp>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import oslo.config.cfg
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# there are 3 ways to access the configuration.
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#
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# a. ryu.cfg.CONF (used to register cli options)
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# b. RyuApp.CONF (preferred way for ryu applications)
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# c. oslo.config.cfg.CONF
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#
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# Currently a. and b. shares a single ConfigOpts instance.
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# We intentionally avoid using c. for our options as a python program
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# which embeds ryu applications (eg. neutron agent) might want to put
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# its own set of cli options into it, which can conflict with ours.
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# (Currently there seems no conflict for the neutron agent. But who knows?)
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# At some point later we might want to unshare a. and b. as well, in order
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# to allow app-specific options.
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CONF = oslo.config.cfg.ConfigOpts()
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# re-export for convenience
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from oslo.config.cfg import ConfigOpts
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from oslo.config.cfg import BoolOpt
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from oslo.config.cfg import IntOpt
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from oslo.config.cfg import ListOpt
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from oslo.config.cfg import MultiStrOpt
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from oslo.config.cfg import StrOpt
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from oslo.config.cfg import FloatOpt
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from oslo.config.cfg import RequiredOptError
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from oslo.config.cfg import ConfigFilesNotFoundError
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