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Diffstat (limited to 'api/escalator/common/config.py')
| -rw-r--r-- | api/escalator/common/config.py | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/api/escalator/common/config.py b/api/escalator/common/config.py new file mode 100644 index 0000000..66a59f1 --- /dev/null +++ b/api/escalator/common/config.py @@ -0,0 +1,204 @@ + +# Copyright 2011 OpenStack Foundation +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + +""" +Routines for configuring Escalator +""" + +import logging +import logging.config +import logging.handlers +import os +import tempfile + +from oslo_concurrency import lockutils +from oslo_config import cfg +from oslo_policy import policy +from paste import deploy + +from escalator import i18n +from escalator.version import version_info as version + +_ = i18n._ + +paste_deploy_opts = [ + cfg.StrOpt('flavor', + help=_('Partial name of a pipeline in your paste configuration ' + 'file with the service name removed. For example, if ' + 'your paste section name is ' + '[pipeline:escalator-api-keystone] use the value ' + '"keystone"')), + cfg.StrOpt('config_file', + help=_('Name of the paste configuration file.')), +] +task_opts = [ + cfg.IntOpt('task_time_to_live', + default=48, + help=_("Time in hours for which a task lives after, either " + "succeeding or failing"), + deprecated_opts=[cfg.DeprecatedOpt('task_time_to_live', + group='DEFAULT')]), + cfg.StrOpt('task_executor', + default='taskflow', + help=_("Specifies which task executor to be used to run the " + "task scripts.")), + cfg.StrOpt('work_dir', + default=None, + help=_('Work dir for asynchronous task operations. ' + 'The directory set here will be used to operate over ' + 'images - normally before they are imported in the ' + 'destination store. When providing work dir, make sure ' + 'enough space is provided for concurrent tasks to run ' + 'efficiently without running out of space. A rough ' + 'estimation can be done by multiplying the number of ' + '`max_workers` - or the N of workers running - by an ' + 'average image size (e.g 500MB). The image size ' + 'estimation should be done based on the average size in ' + 'your deployment. Note that depending on the tasks ' + 'running you may need to multiply this number by some ' + 'factor depending on what the task does. For example, ' + 'you may want to double the available size if image ' + 'conversion is enabled. All this being said, remember ' + 'these are just estimations and you should do them ' + 'based on the worst case scenario and be prepared to ' + 'act in case they were wrong.')), +] +common_opts = [ + cfg.IntOpt('limit_param_default', default=25, + help=_('Default value for the number of items returned by a ' + 'request if not specified explicitly in the request')), + cfg.IntOpt('api_limit_max', default=1000, + help=_('Maximum permissible number of items that could be ' + 'returned by a request')), + cfg.BoolOpt('enable_v1_api', default=True, + help=_("Deploy the v1 OPNFV Escalator API.")), + cfg.BoolOpt('enable_v2_api', default=True, + help=_("Deploy the v2 OpenStack Images API.")), + cfg.StrOpt('pydev_worker_debug_host', + help=_('The hostname/IP of the pydev process listening for ' + 'debug connections')), + cfg.IntOpt('pydev_worker_debug_port', default=5678, + help=_('The port on which a pydev process is listening for ' + 'connections.')), + cfg.StrOpt('digest_algorithm', default='sha1', + help=_('Digest algorithm which will be used for digital ' + 'signature; the default is sha1 the default in Kilo ' + 'for a smooth upgrade process, and it will be updated ' + 'with sha256 in next release(L). Use the command ' + '"openssl list-message-digest-algorithms" to get the ' + 'available algorithms supported by the version of ' + 'OpenSSL on the platform. Examples are "sha1", ' + '"sha256", "sha512", etc.')), +] + +CONF = cfg.CONF +CONF.register_opts(paste_deploy_opts, group='paste_deploy') +CONF.register_opts(task_opts, group='task') +CONF.register_opts(common_opts) +policy.Enforcer(CONF) + + +def parse_args(args=None, usage=None, default_config_files=None): + if "OSLO_LOCK_PATH" not in os.environ: + lockutils.set_defaults(tempfile.gettempdir()) + + CONF(args=args, + project='escalator', + version=version.cached_version_string(), + usage=usage, + default_config_files=default_config_files) + + +def _get_deployment_flavor(flavor=None): + """ + Retrieve the paste_deploy.flavor config item, formatted appropriately + for appending to the application name. + + :param flavor: if specified, use this setting rather than the + paste_deploy.flavor configuration setting + """ + if not flavor: + flavor = CONF.paste_deploy.flavor + return '' if not flavor else ('-' + flavor) + + +def _get_paste_config_path(): + paste_suffix = '-paste.ini' + conf_suffix = '.conf' + if CONF.config_file: + # Assume paste config is in a paste.ini file corresponding + # to the last config file + path = CONF.config_file[-1].replace(conf_suffix, paste_suffix) + else: + path = CONF.prog + paste_suffix + return CONF.find_file(os.path.basename(path)) + + +def _get_deployment_config_file(): + """ + Retrieve the deployment_config_file config item, formatted as an + absolute pathname. + """ + path = CONF.paste_deploy.config_file + if not path: + path = _get_paste_config_path() + if not path: + msg = _("Unable to locate paste config file for %s.") % CONF.prog + raise RuntimeError(msg) + return os.path.abspath(path) + + +def load_paste_app(app_name, flavor=None, conf_file=None): + """ + Builds and returns a WSGI app from a paste config file. + + We assume the last config file specified in the supplied ConfigOpts + object is the paste config file, if conf_file is None. + + :param app_name: name of the application to load + :param flavor: name of the variant of the application to load + :param conf_file: path to the paste config file + + :raises RuntimeError when config file cannot be located or application + cannot be loaded from config file + """ + # append the deployment flavor to the application name, + # in order to identify the appropriate paste pipeline + app_name += _get_deployment_flavor(flavor) + + if not conf_file: + conf_file = _get_deployment_config_file() + + try: + logger = logging.getLogger(__name__) + logger.debug("Loading %(app_name)s from %(conf_file)s", + {'conf_file': conf_file, 'app_name': app_name}) + + app = deploy.loadapp("config:%s" % conf_file, name=app_name) + + # Log the options used when starting if we're in debug mode... + if CONF.debug: + CONF.log_opt_values(logger, logging.DEBUG) + + return app + except (LookupError, ImportError) as e: + msg = (_("Unable to load %(app_name)s from " + "configuration file %(conf_file)s." + "\nGot: %(e)r") % {'app_name': app_name, + 'conf_file': conf_file, + 'e': e}) + logger.error(msg) + raise RuntimeError(msg) |