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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2015 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Manage on alert actions.""" |
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from subprocess import Popen |
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from glances.logger import logger |
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from glances.timer import Timer |
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try: |
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import pystache |
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except ImportError: |
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logger.warning("PyStache lib not installed (action script with mustache will not work)") |
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pystache_tag = False |
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else: |
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pystache_tag = True |
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class GlancesActions(object): |
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"""This class manage action if an alert is reached.""" |
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def __init__(self, args=None): |
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"""Init GlancesActions class.""" |
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# Dict with the criticity status |
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# - key: stat_name |
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# - value: criticity |
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# Goal: avoid to execute the same command twice |
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self.status = {} |
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# Add a timer to avoid any trigger when Glances is started (issue#732) |
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# Action can be triggered after refresh * 2 seconds |
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if hasattr(args, 'time'): |
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self.start_timer = Timer(args.time * 2) |
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else: |
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self.start_timer = Timer(3) |
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def get(self, stat_name): |
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"""Get the stat_name criticity.""" |
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try: |
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return self.status[stat_name] |
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except KeyError: |
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return None |
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def set(self, stat_name, criticity): |
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"""Set the stat_name to criticity.""" |
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self.status[stat_name] = criticity |
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def run(self, stat_name, criticity, commands, mustache_dict=None): |
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"""Run the commands (in background). |
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- stats_name: plugin_name (+ header) |
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- criticity: criticity of the trigger |
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- commands: a list of command line with optional {{mustache}} |
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- mustache_dict: Plugin stats (can be use within {{mustache}}) |
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Return True if the commands have been ran. |
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""" |
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if self.get(stat_name) == criticity or not self.start_timer.finished(): |
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# Action already executed => Exit |
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return False |
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logger.debug("Run action {0} for {1} ({2}) with stats {3}".format(commands, |
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stat_name, |
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criticity, |
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mustache_dict)) |
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# Run all actions in background |
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for cmd in commands: |
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# Replace {{arg}} by the dict one (Thk to {Mustache}) |
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if pystache_tag: |
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cmd_full = pystache.render(cmd, mustache_dict) |
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else: |
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cmd_full = cmd |
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# Execute the action |
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logger.info("Action triggered for {0} ({1}): {2}".format(stat_name, criticity, cmd_full)) |
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logger.debug("Stats value for the trigger: {0}".format(mustache_dict)) |
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try: |
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Popen(cmd_full, shell=True) |
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except OSError as e: |
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logger.error("Can't execute the action ({0})".format(e)) |
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self.set(stat_name, criticity) |
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return True |
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nicolargo /
glances
