121 lines
3.7 KiB
Python
121 lines
3.7 KiB
Python
""" Util functions to assist in detection.
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"""
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import logging
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import subprocess
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from subprocess import CalledProcessError
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from subprocess import PIPE
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from subprocess import Popen
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import psutil
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from monasca_setup import agent_config
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log = logging.getLogger(__name__)
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# check_output was introduced in python 2.7, function added
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# to accommodate python 2.6
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try:
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check_output = subprocess.check_output
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except AttributeError:
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def check_output(*popenargs, **kwargs):
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if 'stdout' in kwargs:
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raise ValueError('stdout argument not allowed, it will be overridden.')
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process = Popen(stdout=PIPE, *popenargs, **kwargs)
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output, unused_err = process.communicate()
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retcode = process.poll()
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if retcode:
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cmd = kwargs.get("args")
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if cmd is None:
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cmd = popenargs[0]
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raise CalledProcessError(retcode, cmd)
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return output
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def find_process_cmdline(search_string):
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"""Simple function to search running process for one with cmdline containing.
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"""
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for process in psutil.process_iter():
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try:
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for arg in process.cmdline():
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if arg.find(search_string) != -1:
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return process
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except psutil.NoSuchProcess:
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continue
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return None
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def find_process_name(pname):
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"""Simple function to search running process for one with pname.
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"""
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for process in psutil.process_iter():
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try:
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if pname == process.name():
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return process
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except psutil.NoSuchProcess:
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continue
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return None
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def find_addr_listening_on_port(port):
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"""Return the IP address which is listening on the specified TCP port."""
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for conn in psutil.net_connections(kind='tcp'):
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if conn.laddr[1] == port and conn.status == psutil.CONN_LISTEN:
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return conn.laddr[0].lstrip("::ffff:")
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def watch_process(search_strings, service=None, component=None, exact_match=True, detailed=False):
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"""Takes a list of process search strings and returns a Plugins object with the config set.
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This was built as a helper as many plugins setup process watching
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"""
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config = agent_config.Plugins()
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parameters = {'name': search_strings[0],
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'detailed': detailed,
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'exact_match': exact_match,
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'search_string': search_strings}
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dimensions = _get_dimensions(service, component)
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if len(dimensions) > 0:
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parameters['dimensions'] = dimensions
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config['process'] = {'init_config': None,
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'instances': [parameters]}
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return config
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def service_api_check(name, url, pattern, service=None, component=None):
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"""Setup a service api to be watched by the http_check plugin.
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"""
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config = agent_config.Plugins()
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parameters = {'name': name,
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'url': url,
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'match_pattern': pattern,
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'timeout': 10,
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'use_keystone': True}
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dimensions = _get_dimensions(service, component)
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if len(dimensions) > 0:
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parameters['dimensions'] = dimensions
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config['http_check'] = {'init_config': None,
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'instances': [parameters]}
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return config
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def _get_dimensions(service, component):
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dimensions = {}
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# If service parameter is set in the plugin config, add the service dimension which
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# will override the service in the agent config
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if service:
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dimensions.update({'service': service})
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# If component parameter is set in the plugin config, add the component dimension which
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# will override the component in the agent config
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if component:
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dimensions.update({'component': component})
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return dimensions
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