yandex-tank/tankcore.py
2014-06-09 16:31:34 +04:00

689 lines
23 KiB
Python

""" The central part of the tool: Core """
from ConfigParser import NoSectionError
import ConfigParser
import datetime
import errno
import itertools
import logging
import os
import re
import select
import shlex
import shutil
import subprocess
import sys
import tempfile
import time
import traceback
import fnmatch
import psutil
def log_stdout_stderr(log, stdout, stderr, comment=""):
"""
This function polls stdout and stderr streams and writes their contents to log
"""
readable = select.select([stdout], [], [], 0)[0]
if stderr:
exceptional = select.select([stderr], [], [], 0)[0]
else:
exceptional = []
log.debug("Selected: %s, %s", readable, exceptional)
for handle in readable:
line = handle.read()
readable.remove(handle)
if line:
log.debug("%s stdout: %s", comment, line.strip())
for handle in exceptional:
line = handle.read()
exceptional.remove(handle)
if line:
log.warn("%s stderr: %s", comment, line.strip())
def expand_to_milliseconds(str_time):
"""
converts 1d2s into milliseconds
"""
return expand_time(str_time, 'ms', 1000)
def expand_to_seconds(str_time):
"""
converts 1d2s into seconds
"""
return expand_time(str_time, 's', 1)
def expand_time(str_time, default_unit='s', multiplier=1):
"""
helper for above functions
"""
parser = re.compile('(\d+)([a-zA-Z]*)')
parts = parser.findall(str_time)
result = 0.0
for value, unit in parts:
value = int(value)
unit = unit.lower()
if unit == '':
unit = default_unit
if unit == 'ms':
result += value * 0.001
continue
elif unit == 's':
result += value
continue
elif unit == 'm':
result += value * 60
continue
elif unit == 'h':
result += value * 60 * 60
continue
elif unit == 'd':
result += value * 60 * 60 * 24
continue
elif unit == 'w':
result += value * 60 * 60 * 24 * 7
continue
else:
raise ValueError(
"String contains unsupported unit %s: %s" % (unit, str_time))
return int(result * multiplier)
def pid_exists(pid):
"""Check whether pid exists in the current process table."""
if pid < 0:
return False
try:
os.kill(pid, 0)
except OSError, exc:
logging.debug("No process[%s]: %s", exc.errno, exc)
return exc.errno == errno.EPERM
else:
p = psutil.Process(pid)
return p.status != psutil.STATUS_ZOMBIE
def execute(cmd, shell=False, poll_period=1.0, catch_out=False):
"""
Wrapper for Popen
"""
log = logging.getLogger(__name__)
log.debug("Starting: %s", cmd)
stdout = ""
stderr = ""
if not shell and isinstance(cmd, basestring):
cmd = shlex.split(cmd)
if catch_out:
process = subprocess.Popen(
cmd, shell=shell, stderr=subprocess.PIPE, stdout=subprocess.PIPE, close_fds=True)
else:
process = subprocess.Popen(cmd, shell=shell, close_fds=True)
while process.poll() is None:
log.debug("Waiting for process to finish: %s", process)
time.sleep(poll_period)
if catch_out:
for line in process.stderr.readlines():
stderr += line
log.warn(line.strip())
for line in process.stdout.readlines():
stdout += line
log.debug(line.strip())
retcode = process.poll()
log.debug("Process exit code: %s", retcode)
return retcode, stdout, stderr
def splitstring(string):
"""
>>> string = 'apple orange "banana tree" green'
>>> splitstring(string)
['apple', 'orange', 'green', '"banana tree"']
"""
patt = re.compile(r'"[\w ]+"')
if patt.search(string):
quoted_item = patt.search(string).group()
newstring = patt.sub('', string)
return newstring.split() + [quoted_item]
else:
return string.split()
def pairs(lst):
"""
Iterate over pairs in the list
"""
return itertools.izip(lst[::2], lst[1::2])
class TankCore:
"""
JMeter + dstat inspired :)
"""
SECTION = 'tank'
PLUGIN_PREFIX = 'plugin_'
PID_OPTION = 'pid'
LOCK_DIR = '/var/lock'
def __init__(self):
self.log = logging.getLogger(__name__)
self.config = ConfigManager()
self.plugins = {}
self.artifacts_dir = None
self.artifact_files = {}
self.plugins_order = []
self.artifacts_base_dir = '.'
self.manual_start = False
self.scheduled_start = None
self.interrupted = False
self.lock_file = None
self.flush_config_to = None
self.lock_dir = None
self.set_option(self.SECTION, self.PID_OPTION, str(os.getpid()))
def get_available_options(self):
return ["artifacts_base_dir", "artifacts_dir", "flush_config_to"]
def load_configs(self, configs):
""" Tells core to load configs set into options storage """
self.log.info("Loading configs...")
for fname in configs:
if not os.path.isfile(fname):
# can't raise exception, since ~/.yandex-tank may not exist
logging.debug("Config file not found: %s", fname)
self.config.load_files(configs)
dotted_options = []
for option, value in self.config.get_options(self.SECTION):
if '.' in option:
dotted_options += [option + '=' + value]
self.apply_shorthand_options(dotted_options, self.SECTION)
self.config.flush()
self.add_artifact_file(self.config.file)
self.set_option(self.SECTION, self.PID_OPTION, str(os.getpid()))
self.flush_config_to = self.get_option(
self.SECTION, "flush_config_to", "")
if self.flush_config_to:
self.config.flush(self.flush_config_to)
def load_plugins(self):
""" Tells core to take plugin options and instantiate plugin classes """
self.log.info("Loading plugins...")
self.artifacts_base_dir = os.path.expanduser(
self.get_option(self.SECTION, "artifacts_base_dir", self.artifacts_base_dir))
self.artifacts_dir = self.get_option(self.SECTION, "artifacts_dir", self.artifacts_dir)
if self.artifacts_dir:
self.artifacts_dir = os.path.expanduser(self.artifacts_dir)
options = self.config.get_options(self.SECTION, self.PLUGIN_PREFIX)
for (plugin_name, plugin_path) in options:
if not plugin_path:
self.log.debug(
"Seems the plugin '%s' was disabled", plugin_name)
continue
instance = self.__load_plugin(plugin_name, plugin_path)
key = os.path.realpath(instance.get_key())
self.plugins[key] = instance
self.plugins_order.append(key)
self.log.debug("Plugin instances: %s", self.plugins)
self.log.debug("Plugins order: %s", self.plugins_order)
def __load_plugin(self, name, path):
""" Load single plugin using 'exec' statement """
self.log.debug("Loading plugin %s from %s", name, path)
for basedir in [''] + sys.path:
if basedir:
new_dir = basedir + '/' + path
else:
new_dir = path
if os.path.exists(new_dir):
new_dir = os.path.dirname(new_dir)
if new_dir not in sys.path:
self.log.debug('Append to path: %s', new_dir)
sys.path.append(new_dir)
res = None
classname = os.path.basename(path)[:-3]
self.log.debug("sys.path: %s", sys.path)
exec ("import " + classname)
script = "res=" + classname + "." + classname + "Plugin(self)"
self.log.debug("Exec: " + script)
exec script
self.log.debug("Instantiated: %s", res)
return res
def plugins_configure(self):
""" Call configure() on all plugins """
if not os.path.exists(self.artifacts_base_dir):
os.makedirs(self.artifacts_base_dir)
os.chmod(self.artifacts_base_dir, 0755)
self.log.info("Configuring plugins...")
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Configuring %s", plugin)
plugin.configure()
self.config.flush()
if self.flush_config_to:
self.config.flush(self.flush_config_to)
def plugins_prepare_test(self):
""" Call prepare_test() on all plugins """
self.log.info("Preparing test...")
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Preparing %s", plugin)
plugin.prepare_test()
if self.flush_config_to:
self.config.flush(self.flush_config_to)
def plugins_start_test(self):
""" Call start_test() on all plugins """
self.log.info("Starting test...")
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Starting %s", plugin)
plugin.start_test()
if self.flush_config_to:
self.config.flush(self.flush_config_to)
def wait_for_finish(self):
""" Call is_test_finished() on all plugins 'till one of them initiates exit """
self.log.info("Waiting for test to finish...")
if not self.plugins:
raise RuntimeError("It's strange: we have no plugins loaded...")
while not self.interrupted:
begin_time = time.time()
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Polling %s", plugin)
retcode = plugin.is_test_finished()
if retcode >= 0:
return retcode
end_time = time.time()
diff = end_time - begin_time
self.log.debug("Polling took %s", diff)
# screen refresh every 0.5 s
if diff < 0.5:
time.sleep(0.5 - diff)
return 1
def plugins_end_test(self, retcode):
""" Call end_test() on all plugins """
self.log.info("Finishing test...")
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Finalize %s", plugin)
try:
self.log.debug("RC before: %s", retcode)
plugin.end_test(retcode)
self.log.debug("RC after: %s", retcode)
except Exception, ex:
self.log.error("Failed finishing plugin %s: %s", plugin, ex)
self.log.debug(
"Failed finishing plugin: %s", traceback.format_exc(ex))
if not retcode:
retcode = 1
if self.flush_config_to:
self.config.flush(self.flush_config_to)
return retcode
def plugins_post_process(self, retcode):
"""
Call post_process() on all plugins
"""
self.log.info("Post-processing test...")
for plugin_key in self.plugins_order:
plugin = self.__get_plugin_by_key(plugin_key)
self.log.debug("Post-process %s", plugin)
try:
self.log.debug("RC before: %s", retcode)
retcode = plugin.post_process(retcode)
self.log.debug("RC after: %s", retcode)
except Exception, ex:
self.log.error(
"Failed post-processing plugin %s: %s", plugin, ex)
self.log.debug(
"Failed post-processing plugin: %s", traceback.format_exc(ex))
del self.plugins[plugin_key]
if not retcode:
retcode = 1
if self.flush_config_to:
self.config.flush(self.flush_config_to)
self.__collect_artifacts()
return retcode
def __collect_artifacts(self):
self.log.debug("Collecting artifacts")
if not self.artifacts_dir:
date_str = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S.")
self.artifacts_dir = tempfile.mkdtemp(
"", date_str, self.artifacts_base_dir)
if not os.path.isdir(self.artifacts_dir):
os.makedirs(self.artifacts_dir)
os.chmod(self.artifacts_dir, 0755)
self.log.info("Artifacts dir: %s", self.artifacts_dir)
for filename, keep in self.artifact_files.items():
try:
self.__collect_file(filename, keep)
except Exception, ex:
self.log.warn("Failed to collect file %s: %s", filename, ex)
def get_option(self, section, option, default=None):
"""
Get an option from option storage
"""
if not self.config.config.has_section(section):
self.log.debug("No section '%s', adding", section)
self.config.config.add_section(section)
try:
value = self.config.config.get(section, option).strip()
except ConfigParser.NoOptionError as ex:
if default is not None:
default = str(default)
self.config.config.set(section, option, default)
self.config.flush()
value = default.strip()
else:
self.log.warn("Mandatory option %s was not found in section %s", option, section)
raise ex
if len(value) > 1 and value[0] == '`' and value[-1] == '`':
self.log.debug("Expanding shell option %s", value)
retcode, stdout, stderr = execute(value[1:-1], True, 0.1, True)
if retcode or stderr:
raise ValueError(
"Error expanding option %s, RC: %s" % (value, retcode))
value = stdout.strip()
return value
def set_option(self, section, option, value):
"""
Set an option in storage
"""
if not self.config.config.has_section(section):
self.config.config.add_section(section)
self.config.config.set(section, option, value)
self.config.flush()
def get_plugin_of_type(self, needle):
"""
Retrieve a plugin of desired class, KeyError raised otherwise
"""
self.log.debug("Searching for plugin: %s", needle)
key = os.path.realpath(needle.get_key())
return self.__get_plugin_by_key(key)
def __get_plugin_by_key(self, key):
"""
Get plugin from loaded by its key
"""
if key in self.plugins.keys():
return self.plugins[key]
ext = os.path.splitext(key)[1].lower()
if ext == '.py' and key + 'c' in self.plugins.keys(): # .py => .pyc
return self.plugins[key + 'c']
if ext == '.pyc' and key[:-1] in self.plugins.keys(): # .pyc => .py:
return self.plugins[key[:-1]]
raise KeyError("Requested plugin type not found: %s" % key)
def __collect_file(self, filename, keep_original=False):
"""
Move or copy single file to artifacts dir
"""
if not self.artifacts_dir:
self.log.warning("No artifacts dir configured")
return
dest = self.artifacts_dir + '/' + os.path.basename(filename)
self.log.debug("Collecting file: %s to %s", filename, dest)
if not filename or not os.path.exists(filename):
self.log.warning("File not found to collect: %s", filename)
return
if os.path.exists(dest):
# FIXME: 3 find a way to store artifacts anyway
self.log.warning("File already exists: %s", dest)
return
if keep_original:
shutil.copy(filename, self.artifacts_dir)
else:
shutil.move(filename, self.artifacts_dir)
os.chmod(dest, 0644)
def add_artifact_file(self, filename, keep_original=False):
"""
Add file to be stored as result artifact on post-process phase
"""
if filename:
logging.debug("Adding artifact file to collect (keep=%s): %s", keep_original, filename)
self.artifact_files[filename] = keep_original
def apply_shorthand_options(self, options, default_section='DEFAULT'):
for option_str in options:
try:
section = option_str[:option_str.index('.')]
option = option_str[option_str.index('.') + 1:option_str.index('=')]
except ValueError:
section = default_section
option = option_str[:option_str.index('=')]
value = option_str[option_str.index('=') + 1:]
self.log.debug(
"Override option: %s => [%s] %s=%s", option_str, section, option, value)
self.set_option(section, option, value)
def get_lock_dir(self):
if not self.lock_dir:
self.lock_dir = self.get_option(self.SECTION, "lock_dir", self.LOCK_DIR)
return os.path.expanduser(self.lock_dir)
def get_lock(self, force=False):
if not force and self.__there_is_locks():
raise RuntimeError("There is lock files")
fh, self.lock_file = tempfile.mkstemp(
'.lock', 'lunapark_', self.get_lock_dir())
os.close(fh)
os.chmod(self.lock_file, 0644)
self.config.file = self.lock_file
self.config.flush()
def release_lock(self):
self.config.file = None
if self.lock_file and os.path.exists(self.lock_file):
self.log.debug("Releasing lock: %s", self.lock_file)
os.remove(self.lock_file)
def __there_is_locks(self):
retcode = False
lock_dir = self.get_lock_dir()
for filename in os.listdir(lock_dir):
if fnmatch.fnmatch(filename, 'lunapark_*.lock'):
full_name = os.path.join(lock_dir, filename)
self.log.warn("Lock file present: %s", full_name)
try:
info = ConfigParser.ConfigParser()
info.read(full_name)
pid = info.get(TankCore.SECTION, self.PID_OPTION)
if not pid_exists(int(pid)):
self.log.debug(
"Lock PID %s not exists, ignoring and trying to remove", pid)
try:
os.remove(full_name)
except Exception, exc:
self.log.debug(
"Failed to delete lock %s: %s", full_name, exc)
else:
retcode = True
except Exception, exc:
self.log.warn(
"Failed to load info from lock %s: %s", full_name, exc)
retcode = True
return retcode
def mkstemp(self, suffix, prefix, directory=None):
"""
Generate temp file name in artifacts base dir
and close temp file handle
"""
if not directory:
directory = self.artifacts_base_dir
fd, fname = tempfile.mkstemp(suffix, prefix, directory)
os.close(fd)
os.chmod(fname, 0644) # FIXME: chmod to parent dir's mode?
return fname
class ConfigManager:
""" Option storage class """
def __init__(self):
self.file = None
self.log = logging.getLogger(__name__)
self.config = ConfigParser.ConfigParser()
def load_files(self, configs):
""" Read configs set into storage """
self.log.debug("Reading configs: %s", configs)
try:
self.config.read(configs)
except Exception as ex:
self.log.error("Can't load configs: %s", ex)
raise ex
def flush(self, filename=None):
""" Flush current stat to file """
if not filename:
filename = self.file
if filename:
self.log.debug("Flushing config to: %s", filename)
handle = open(filename, 'wb')
self.config.write(handle)
handle.close()
def get_options(self, section, prefix=''):
""" Get options list with requested prefix """
res = []
self.log.debug(
"Looking in section '%s' for options starting with '%s'", section, prefix)
try:
for option in self.config.options(section):
self.log.debug("Option: %s", option)
if not prefix or option.find(prefix) == 0:
self.log.debug("Option: %s matched", option)
res += [
(option[len(prefix):], self.config.get(section, option))]
except NoSectionError, ex:
self.log.debug("No section: %s", ex)
self.log.debug("Found options: %s", res)
return res
def find_sections(self, prefix):
""" return sections with specified prefix """
res = []
for section in self.config.sections():
if section.startswith(prefix):
res.append(section)
return res
class AbstractPlugin:
""" Parent class for all plugins/modules """
SECTION = 'DEFAULT'
@staticmethod
def get_key():
""" Get dictionary key for plugin, should point to __file__ magic constant """
raise TypeError("Abstract method needs to be overridden")
def __init__(self, core):
"""
@type core: TankCore
"""
self.log = logging.getLogger(__name__)
self.core = core
def configure(self):
""" A stage to read config values and instantiate objects """
pass
def prepare_test(self):
""" Test preparation tasks """
pass
def start_test(self):
""" Launch test process """
pass
def is_test_finished(self):
""" Polling call, if result differs from -1 then test end will be triggeted """
return -1
def end_test(self, retcode):
""" Stop processes launched at 'start_test', change return code if necessary """
return retcode
def post_process(self, retcode):
""" Post-process test data """
return retcode
def get_option(self, option_name, default_value=None):
""" Wrapper to get option from plugins' section """
return self.core.get_option(self.SECTION, option_name, default_value)
def set_option(self, option_name, value):
""" Wrapper to set option to plugins' section """
return self.core.set_option(self.SECTION, option_name, value)
def get_available_options(self):
""" returns array containing known options for plugin """
return []
def get_multiline_option(self, option_name, default_value=None):
if default_value is not None:
default = ' '.join(default_value)
else:
default = None
value = self.get_option(option_name, default)
if value:
return (' '.join(value.split("\n"))).split(' ')
else:
return ()