351a0c29f2
Create the basic data abstraction layer into the DB in basic API service.I create a database table services as an example. This table is used to save the running status of deployed services. The command smaug-manage is used to manage the database. we can use this command 'smaug-manage db sync' to sync the smaug database up to the most recent version. smaug-manage version list: exposing the smaug codebase version. smaug-manage config list: exposing the configuration. smaug-manage service list: showing a list of all smaug services status. Change-Id: I5d64c5d38780449e1fb005acf04f69d482ac59cc Closes-Bug: #1525794
244 lines
7.3 KiB
Python
244 lines
7.3 KiB
Python
#!/usr/bin/env python
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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 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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"""
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CLI interface for smaug management.
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"""
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from __future__ import print_function
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import os
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import sys
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from oslo_config import cfg
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from oslo_db.sqlalchemy import migration
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from oslo_log import log as logging
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from smaug import i18n
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i18n.enable_lazy()
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# Need to register global_opts
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from smaug.common import config # noqa
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from smaug import context
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from smaug import db
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from smaug.db import migration as db_migration
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from smaug.db.sqlalchemy import api as db_api
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from smaug.i18n import _
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from smaug import utils
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from smaug import version
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CONF = cfg.CONF
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# Decorators for actions
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def args(*args, **kwargs):
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def _decorator(func):
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func.__dict__.setdefault('args', []).insert(0, (args, kwargs))
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return func
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return _decorator
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class DbCommands(object):
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"""Class for managing the database."""
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def __init__(self):
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pass
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@args('version', nargs='?', default=None,
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help='Database version')
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def sync(self, version=None):
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"""Sync the database up to the most recent version."""
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return db_migration.db_sync(version)
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def version(self):
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"""Print the current database version."""
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print(db_migration.MIGRATE_REPO_PATH)
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print(migration.db_version(db_api.get_engine(),
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db_migration.MIGRATE_REPO_PATH,
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db_migration.INIT_VERSION))
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class VersionCommands(object):
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"""Class for exposing the codebase version."""
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def __init__(self):
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pass
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def list(self):
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print(version.version_string())
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def __call__(self):
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self.list()
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class ConfigCommands(object):
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"""Class for exposing the flags defined by flag_file(s)."""
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def __init__(self):
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pass
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@args('param', nargs='?', default=None,
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help='Configuration parameter to display (default: %(default)s)')
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def list(self, param=None):
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"""List parameters configured for smaug.
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Lists all parameters configured for smaug unless an optional argument
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is specified. If the parameter is specified we only print the
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requested parameter. If the parameter is not found an appropriate
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error is produced by .get*().
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"""
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param = param and param.strip()
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if param:
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print('%s = %s' % (param, CONF.get(param)))
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else:
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for key, value in CONF.items():
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print('%s = %s' % (key, value))
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class ServiceCommands(object):
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"""Methods for managing services."""
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def list(self):
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"""Show a list of all smaug services."""
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ctxt = context.get_admin_context()
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services = db.service_get_all(ctxt)
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print_format = "%-16s %-36s %-16s %-10s %-5s %-10s"
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print(print_format % (_('Binary'),
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_('Host'),
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_('Status'),
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_('State'),
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_('Updated At')))
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for svc in services:
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alive = utils.service_is_up(svc)
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art = ":-)" if alive else "XXX"
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status = 'enabled'
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if svc['disabled']:
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status = 'disabled'
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print(print_format % (svc['binary'], svc['host'].partition('.')[0],
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status, art,
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svc['updated_at']))
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CATEGORIES = {
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'config': ConfigCommands,
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'db': DbCommands,
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'service': ServiceCommands,
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'version': VersionCommands,
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}
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def methods_of(obj):
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"""Return non-private methods from an object.
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Get all callable methods of an object that don't start with underscore
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:return: a list of tuples of the form (method_name, method)
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"""
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result = []
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for i in dir(obj):
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if callable(getattr(obj, i)) and not i.startswith('_'):
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result.append((i, getattr(obj, i)))
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return result
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def add_command_parsers(subparsers):
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for category in CATEGORIES:
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command_object = CATEGORIES[category]()
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parser = subparsers.add_parser(category)
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parser.set_defaults(command_object=command_object)
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category_subparsers = parser.add_subparsers(dest='action')
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for (action, action_fn) in methods_of(command_object):
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parser = category_subparsers.add_parser(action)
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action_kwargs = []
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for args, kwargs in getattr(action_fn, 'args', []):
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parser.add_argument(*args, **kwargs)
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parser.set_defaults(action_fn=action_fn)
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parser.set_defaults(action_kwargs=action_kwargs)
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category_opt = cfg.SubCommandOpt('category',
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title='Command categories',
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handler=add_command_parsers)
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def get_arg_string(args):
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arg = None
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if args[0] == '-':
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# (Note)zhiteng: args starts with FLAGS.oparser.prefix_chars
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# is optional args. Notice that cfg module takes care of
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# actual ArgParser so prefix_chars is always '-'.
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if args[1] == '-':
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# This is long optional arg
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arg = args[2:]
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else:
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arg = args[1:]
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else:
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arg = args
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return arg
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def fetch_func_args(func):
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fn_args = []
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for args, kwargs in getattr(func, 'args', []):
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arg = get_arg_string(args[0])
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fn_args.append(getattr(CONF.category, arg))
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return fn_args
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def main():
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"""Parse options and call the appropriate class/method."""
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CONF.register_cli_opt(category_opt)
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script_name = sys.argv[0]
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if len(sys.argv) < 2:
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print(_("\nOpenStack Smaug version: %(version)s\n") %
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{'version': version.version_string()})
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print(script_name + " category action [<args>]")
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print(_("Available categories:"))
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for category in CATEGORIES:
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print(_("\t%s") % category)
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sys.exit(2)
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try:
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CONF(sys.argv[1:], project='smaug',
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version=version.version_string())
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logging.setup(CONF, "smaug")
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except cfg.ConfigDirNotFoundError as details:
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print(_("Invalid directory: %s") % details)
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sys.exit(2)
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except cfg.ConfigFilesNotFoundError:
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cfgfile = CONF.config_file[-1] if CONF.config_file else None
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if cfgfile and not os.access(cfgfile, os.R_OK):
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st = os.stat(cfgfile)
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print(_("Could not read %s, Please try running this"
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"command again as root/Administrator privilege"
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"using sudo.") % cfgfile)
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try:
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os.execvp('sudo', ['sudo', '-u', '#%s' % st.st_uid] + sys.argv)
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except Exception:
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print(_('sudo failed, continuing as if nothing happened'))
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print(_('Please re-run smaug-manage as root.'))
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sys.exit(2)
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fn = CONF.category.action_fn
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fn_args = fetch_func_args(fn)
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fn(*fn_args)
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