config: automatically assign instance_id for host and process if it has been set to *

It is no longer a problem to invent new instance_ids on startup - unused keys
will be deleted.

rhodecode/config/environment.py

@@ -1,110 +1,116 b''
 """Pylons environment configuration"""
 
 import os
 import logging
 import rhodecode
 
 from mako.lookup import TemplateLookup
 from pylons.configuration import PylonsConfig
 from pylons.error import handle_mako_error
 
 # don't remove this import it does magic for celery
 from rhodecode.lib import celerypylons
 
 import rhodecode.lib.app_globals as app_globals
 
 from rhodecode.config.routing import make_map
 
 from rhodecode.lib import helpers
 from rhodecode.lib.auth import set_available_permissions
 from rhodecode.lib.utils import repo2db_mapper, make_ui, set_rhodecode_config,\
     load_rcextensions, check_git_version
 from rhodecode.lib.utils2 import engine_from_config, str2bool
 from rhodecode.lib.db_manage import DbManage
 from rhodecode.model import init_model
 from rhodecode.model.scm import ScmModel
 
 log = logging.getLogger(__name__)
 
 
 def load_environment(global_conf, app_conf, initial=False):
     """
     Configure the Pylons environment via the ``pylons.config``
     object
     """
     config = PylonsConfig()
 
     # Pylons paths
     root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     paths = dict(
         root=root,
         controllers=os.path.join(root, 'controllers'),
         static_files=os.path.join(root, 'public'),
         templates=[os.path.join(root, 'templates')]
     )
 
     # Initialize config with the basic options
     config.init_app(global_conf, app_conf, package='rhodecode', paths=paths)
 
     # store some globals into rhodecode
     rhodecode.CELERY_ON = str2bool(config['app_conf'].get('use_celery'))
     rhodecode.CELERY_EAGER = str2bool(config['app_conf'].get('celery.always.eager'))
 
     config['routes.map'] = make_map(config)
     config['pylons.app_globals'] = app_globals.Globals(config)
     config['pylons.h'] = helpers
     rhodecode.CONFIG = config
 
     load_rcextensions(root_path=config['here'])
 
     # Setup cache object as early as possible
     import pylons
     pylons.cache._push_object(config['pylons.app_globals'].cache)
 
     # Create the Mako TemplateLookup, with the default auto-escaping
     config['pylons.app_globals'].mako_lookup = TemplateLookup(
         directories=paths['templates'],
         error_handler=handle_mako_error,
         module_directory=os.path.join(app_conf['cache_dir'], 'templates'),
         input_encoding='utf-8', default_filters=['escape'],
         imports=['from webhelpers.html import escape'])
 
     # sets the c attribute access when don't existing attribute are accessed
     config['pylons.strict_tmpl_context'] = True
     test = os.path.split(config['__file__'])[-1] == 'test.ini'
     if test:
         if os.environ.get('TEST_DB'):
             # swap config if we pass enviroment variable
             config['sqlalchemy.db1.url'] = os.environ.get('TEST_DB')
 
         from rhodecode.lib.utils import create_test_env, create_test_index
         from rhodecode.tests import  TESTS_TMP_PATH
         # set RC_NO_TMP_PATH=1 to disable re-creating the database and
         # test repos
         if not int(os.environ.get('RC_NO_TMP_PATH', 0)):
             create_test_env(TESTS_TMP_PATH, config)
         # set RC_WHOOSH_TEST_DISABLE=1 to disable whoosh index during tests
         if not int(os.environ.get('RC_WHOOSH_TEST_DISABLE', 0)):
             create_test_index(TESTS_TMP_PATH, config, True)
 
     #check git version
     check_git_version()
     DbManage.check_waitress()
     # MULTIPLE DB configs
     # Setup the SQLAlchemy database engine
     sa_engine_db1 = engine_from_config(config, 'sqlalchemy.db1.')
     init_model(sa_engine_db1)
 
     repos_path = make_ui('db').configitems('paths')[0][1]
     repo2db_mapper(ScmModel().repo_scan(repos_path),
                    remove_obsolete=False, install_git_hook=False)
     set_available_permissions(config)
     config['base_path'] = repos_path
     set_rhodecode_config(config)
+
+    instance_id = rhodecode.CONFIG.get('instance_id')
+    if instance_id == '*':
+        instance_id = '%s-%s' % (os.uname()[1], os.getpid())
+        rhodecode.CONFIG['instance_id'] = instance_id
+
     # CONFIGURATION OPTIONS HERE (note: all config options will override
     # any Pylons config options)
 
     # store config reference into our module to skip import magic of
     # pylons
     rhodecode.CONFIG.update(config)
     return config