/usr/lib/python2.7/dist-packages/mysql/fabric/services/manage.py is in mysql-utilities 1.6.1-2.
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# Copyright (c) 2013,2014, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
"""Provide key functions to start, stop and check Fabric's availability and
information on available commands.
"""
import getpass
import logging
import logging.handlers
import os.path
import urlparse
from mysql.fabric import (
config as _config,
errors as _errors,
events as _events,
executor as _executor,
failure_detector as _failure_detector,
persistence as _persistence,
recovery as _recovery,
services as _services,
utils as _utils,
server as _server,
error_log as _error_log,
credentials,
handler as _logging,
providers as providers,
)
from mysql.fabric.command import (
Command,
CommandResult,
ResultSet,
)
from mysql.fabric.handler import (
MySQLHandler,
)
from mysql.fabric.node import (
FabricNode
)
_LOGGER = logging.getLogger(__name__)
# Logging levels.
_LOGGING_LEVELS = {
"CRITICAL" : logging.CRITICAL,
"ERROR" : logging.ERROR,
"WARNING" : logging.WARNING,
"INFO" : logging.INFO,
"DEBUG" : logging.DEBUG
}
# Number of concurrent threads that are created to handle requests.
DEFAULT_N_THREADS = 5
# Number of concurrent executors that are created to handle jobs.
DEFAULT_N_EXECUTORS = 5
#Default TTL value
DEFAULT_TTL = 1
# MySQL's port
_MYSQL_PORT = 3306
class Logging(Command):
"""Set logging level.
"""
group_name = "manage"
command_name = "logging_level"
def execute(self, module, level):
""" Set logging level.
:param module: Module that will have its logging level changed.
:param level: The logging level that will be set.
:return: Return True if the logging level is changed. Otherwise,
False.
"""
try:
__import__(module)
logger = logging.getLogger(module)
logger.setLevel(_LOGGING_LEVELS[level.upper()])
except (KeyError, ImportError) as error:
_LOGGER.debug(error)
return CommandResult(str(error))
return CommandResult(None)
class Ping(Command):
"""Check whether Fabric server is running or not.
"""
group_name = "manage"
command_name = "ping"
def execute(self):
"""Check whether Fabric server is running or not.
"""
pass
class Start(Command):
"""Start the Fabric server.
"""
group_name = "manage"
command_name = "start"
def dispatch(self, daemonize=False):
"""Start the Fabric server.
"""
# Configure logging.
_configure_logging(self.config, daemonize)
# Configure connections.
_configure_connections(self.config)
credentials.check_initial_setup(
self.config, _persistence.MySQLPersister(),
check_only=True
)
# Daemonize ourselves.
if daemonize:
_utils.daemonize()
# Start Fabric server.
_start(self.options, self.config)
_services.ServiceManager().wait()
class Setup(Command):
"""Setup Fabric Storage System.
Create a database and necessary objects.
"""
group_name = "manage"
command_name = "setup"
def dispatch(self):
"""Setup Fabric Storage System.
"""
# Configure logging.
_configure_logging(self.config, False)
# Configure connections.
_configure_connections(self.config)
# Create database and objects.
_persistence.setup(config=self.config)
credentials.check_initial_setup(self.config,
_persistence.MySQLPersister())
class Teardown(Command):
"""Teardown Fabric Storage System.
Drop database and its objects.
"""
group_name = "manage"
command_name = "teardown"
def dispatch(self):
"""Teardown Fabric Storage System.
"""
# Configure logging.
_configure_logging(self.config, False)
# Configure connections.
_configure_connections(self.config)
# Drop database and objects.
_persistence.teardown()
def _create_file_handler(config, info, delay=0):
"""Define a file handler where logging information will be
sent to.
"""
from logging.handlers import RotatingFileHandler
assert info.scheme == 'file'
if info.netloc:
raise _errors.ConfigurationError(
"Malformed file URL '%s'" % (info.geturl(),)
)
if os.path.isabs(info.path):
path = info.path
else:
# Relative path, fetch the logdir from the configuration.
# Using 'logging' section instead of 'DEFAULT' to allow
# configuration parameters to be overridden in the logging
# section.
logdir = config.get('logging', 'logdir')
path = os.path.join(logdir, info.path)
return RotatingFileHandler(path, delay=delay)
# A URL provided should either have a path or an address, but not
# both. For example:
#
# syslog:///dev/log ---> Address is /dev/log
# syslog://localhost:555 ---> Address is ('localhost', 555)
# syslog://my.example.com ---> Address is ('my.example.com', 541)
#
# The following is not allowed:
#
# syslog://example.com/foo/bar
def _create_syslog_handler(config, info):
"""Define a syslog handler where logging information will be
sent to.
"""
from logging.handlers import SYSLOG_UDP_PORT, SysLogHandler
assert info.scheme == 'syslog'
if info.netloc and info.path:
raise _errors.ConfigurationError(
"Malformed syslog URL '%s'" % (info.geturl(),)
)
if info.netloc:
assert not info.path
address = info.netloc.split(':')
if len(address) == 1:
address.append(SYSLOG_UDP_PORT)
elif info.path:
assert not info.netloc
address = info.path
return SysLogHandler(address=address)
_LOGGING_HANDLER = {
'file': _create_file_handler,
'syslog': _create_syslog_handler,
}
def _configure_logging(config, daemon):
"""Configure the logging system.
"""
# Set up the logging information.
logger = logging.getLogger("mysql.fabric")
handler = None
# Set up logging handler
if daemon:
urlinfo = urlparse.urlparse(config.get('logging', 'url'))
handler = _LOGGING_HANDLER[urlinfo.scheme](config, urlinfo)
else:
handler = logging.StreamHandler()
mysql_handler = _logging.MySQLHandler()
formatter = logging.Formatter(
"[%(levelname)s] %(created)f - %(threadName)s "
"- %(message)s")
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.addHandler(mysql_handler)
logger.setLevel(_LOGGING_LEVELS["DEBUG"])
mysql_handler.setLevel(_LOGGING_LEVELS["DEBUG"])
try:
level = config.get("logging", "level")
handler.setLevel(_LOGGING_LEVELS[level.upper()])
except KeyError:
handler.setLevel(_LOGGING_LEVELS["INFO"])
def _configure_connections(config):
"""Configure information on database connection and remote
servers.
"""
# Configure the number of concurrent executors.
try:
number_executors = config.get('executor', "executors")
number_executors = int(number_executors)
except (_config.NoOptionError, _config.NoSectionError, ValueError):
number_executors = DEFAULT_N_EXECUTORS
executor = _executor.Executor()
executor.set_number_executors(number_executors)
services = {}
ssl_config = {}
# XML-RPC service
try:
services['protocol.xmlrpc'] = config.get('protocol.xmlrpc', "address")
try:
number_threads = config.get('protocol.xmlrpc', "threads")
number_threads = int(number_threads)
except (_config.NoOptionError, ValueError):
number_threads = DEFAULT_N_THREADS
try:
for option in ('ssl_ca', 'ssl_key', 'ssl_cert'):
ssl_config[option] = config.get('protocol.xmlrpc', option)
except _config.NoOptionError:
ssl_config = {}
except _config.NoSectionError:
raise _errors.ConfigurationError(
'Configuration for protocol.xmlrpc is required')
# MySQL-RPC service
try:
services['protocol.mysql'] = config.get('protocol.mysql', "address")
except _config.NoSectionError:
# No MySQL-RPC configured
pass
# Define service configuration
_services.ServiceManager(services, number_threads, ssl_config)
# Fetch options to configure the state store.
address = config.get('storage', 'address')
try:
host, port = address.split(':')
port = int(port)
except ValueError:
host = address
port = _MYSQL_PORT
user = config.get('storage', 'user')
database = config.get('storage', 'database')
try:
password = config.get('storage', 'password')
except _config.NoOptionError:
password = getpass.getpass()
try:
connection_timeout = config.get("storage", "connection_timeout")
connection_timeout = float(connection_timeout)
except (_config.NoOptionError, _config.NoSectionError, ValueError):
connection_timeout = None
try:
connection_attempts = config.get("storage", "connection_attempts")
connection_attempts = int(connection_attempts)
except (_config.NoOptionError, _config.NoSectionError, ValueError):
connection_attempts = None
try:
connection_delay = config.get("storage", "connection_delay")
connection_delay = int(connection_delay)
except (_config.NoOptionError, _config.NoSectionError, ValueError):
connection_delay = None
try:
auth_plugin = config.get("storage", "auth_plugin")
except (_config.NoOptionError, _config.NoSectionError, ValueError):
auth_plugin = None
# Define state store configuration.
_persistence.init(
host=host, port=port, user=user, password=password, database=database,
connection_timeout=connection_timeout,
connection_attempts=connection_attempts,
connection_delay=connection_delay,
auth_plugin=auth_plugin
)
def _setup_ttl(config):
"""Read the configured TTL and set its value.
"""
#configure the TTL to be used for the connectors.
try:
ttl = config.get('connector', "ttl")
ttl = int(ttl)
_utils.TTL = ttl
except (_config.NoOptionError, _config.NoSectionError, ValueError):
_utils.TTL = DEFAULT_TTL
def _start(options, config):
"""Start Fabric server.
"""
#Configure TTL
_setup_ttl(config)
# Configure modules that are not dynamic loaded.
_server.configure(config)
_error_log.configure(config)
_failure_detector.configure(config)
# Load information on all providers.
providers.find_providers()
# Load all services into the service manager
_services.ServiceManager().load_services(options, config)
# Initilize the state store.
_persistence.init_thread()
# Check the maximum number of threads.
_utils.check_number_threads()
# Configure Fabric Node.
fabric = FabricNode()
reported = _utils.get_time()
_LOGGER.info(
"Fabric node starting.",
extra={
'subject' : str(fabric.uuid),
'category' : MySQLHandler.NODE,
'type' : MySQLHandler.START,
'reported' : reported
}
)
fabric.startup = reported
# Start the executor, failure detector and then service manager. In this
# scenario, the recovery is sequentially executed after starting the
# executor and before starting the service manager.
_events.Handler().start()
_recovery.recovery()
_failure_detector.FailureDetector.register_groups()
_services.ServiceManager().start()
class Stop(Command):
"""Stop the Fabric server.
"""
group_name = "manage"
command_name = "stop"
def execute(self):
"""Stop the Fabric server.
"""
_shutdown()
def _shutdown():
"""Shutdown Fabric server.
"""
_failure_detector.FailureDetector.unregister_groups()
_services.ServiceManager().shutdown()
_events.Handler().shutdown()
_events.Handler().wait()
_LOGGER.info(
"Fabric node stopped.",
extra={
'subject' : 'Node',
'category' : MySQLHandler.NODE,
'type' : MySQLHandler.STOP
}
)
class FabricLookups(Command):
"""Return a list of Fabric servers.
"""
group_name = "dump"
command_name = "fabric_nodes"
def execute(self, protocol=None):
"""Return a list with all the available Fabric Servers.
:return: List with existing Fabric Servers.
:rtype: ["host:port", ...]
"""
service = _services.ServiceManager()
rset = ResultSet(names=('host', 'port'),types=(str, int))
for _, address in service.address(protocol).items():
rset.append_row(address.split(":"))
return CommandResult(None, results=rset)
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