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# This file is part of Glances. |
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# |
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# SPDX-FileCopyrightText: 2022 Nicolas Hennion <[email protected]> |
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# |
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# SPDX-License-Identifier: LGPL-3.0-only |
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# |
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"""Manage the Glances server static list.""" |
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from socket import gaierror, gethostbyname |
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from glances.logger import logger |
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DEFAULT_COLUMNS = "system:hr_name,load:min5,cpu:total,mem:percent" |
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class GlancesStaticServer: |
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"""Manage the static servers list for the client browser.""" |
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_section = "serverlist" |
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def __init__(self, config=None, args=None): |
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# server_list is a list of dict (JSON compliant) |
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# [ {'key': 'zeroconf name', ip': '172.1.2.3', 'port': 61209, 'protocol': 'rpc', 'cpu': 3, 'mem': 34 ...} ... ] |
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# Load server list from the Glances configuration file |
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self._server_list = self.load_server_list(config) |
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# Load columns to grab/display in the browser mode |
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self._columns = self.load_columns(config) |
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def load_server_list(self, config): |
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"""Load the server list from the configuration file.""" |
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server_list = [] |
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if config is None: |
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logger.debug("No configuration file available. Cannot load server list.") |
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elif not config.has_section(self._section): |
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logger.warning(f"No [{self._section}] section in the configuration file. Cannot load server list.") |
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else: |
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logger.info(f"Start reading the [{self._section}] section in the configuration file") |
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for i in range(1, 256): |
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# Read the configuration |
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new_server = {} |
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postfix = f'server_{str(i)}_' |
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for s in ['name', 'port', 'alias', 'protocol']: |
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new_server[s] = config.get_value(self._section, f'{postfix}{s}') |
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if new_server['name'] is None: |
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continue |
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# Type in order to support both RPC and REST servers (see #1121) |
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if new_server['protocol'] is None: |
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new_server['protocol'] = 'rpc' |
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new_server['protocol'] = new_server['protocol'].lower() |
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if new_server['protocol'] not in ('rpc', 'rest'): |
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logger.error(f'Unknow protocol for {postfix}, skip it.') |
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continue |
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# Default port |
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if new_server['port'] is None: |
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new_server['port'] = '61209' if new_server['type'] == 'rpc' else '61208' |
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# By default, try empty (aka no) password |
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new_server['username'] = 'glances' |
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new_server['password'] = '' |
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try: |
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new_server['ip'] = gethostbyname(new_server['name']) |
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except gaierror as e: |
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logger.error("Cannot get IP address for server {} ({})".format(new_server['name'], e)) |
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continue |
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new_server['key'] = new_server['name'] + ':' + new_server['port'] |
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# Default status is 'UNKNOWN' |
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new_server['status'] = 'UNKNOWN' |
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# Server type is 'STATIC' |
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new_server['type'] = 'STATIC' |
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# Add the server to the list |
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logger.debug("Add server {} to the static list".format(new_server['name'])) |
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server_list.append(new_server) |
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# Server list loaded |
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logger.info(f"{len(server_list)} server(s) loaded from the configuration file") |
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logger.debug(f"Static server list: {server_list}") |
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return server_list |
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def load_columns(self, config): |
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"""Load columns definition from the configuration file. |
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Read: 'system:hr_name,load:min5,cpu:total,mem:percent,sensors:value:Ambient' |
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Return: [{'plugin': 'system', 'field': 'hr_name'}, |
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{'plugin': 'load', 'field': 'min5'}, |
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{'plugin': 'cpu', 'field': 'total'}, |
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{'plugin': 'mem', 'field': 'percent'}, |
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{'plugin': 'sensors', 'field': 'value', 'key': 'Ambient'}] |
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""" |
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if config is None: |
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logger.debug("No configuration file available. Cannot load columns definition.") |
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elif not config.has_section(self._section): |
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logger.warning(f"No [{self._section}] section in the configuration file. Cannot load columns definition.") |
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columns_def = ( |
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config.get_value(self._section, 'columns') |
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if config.get_value(self._section, 'columns') |
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else DEFAULT_COLUMNS |
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) |
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return [dict(zip(['plugin', 'field', 'key'], i.split(':'))) for i in columns_def.split(',')] |
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def get_servers_list(self): |
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"""Return the current server list (list of dict).""" |
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return self._server_list |
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def set_server(self, server_pos, key, value): |
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"""Set the key to the value for the server_pos (position in the list).""" |
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self._server_list[server_pos][key] = value |
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def get_columns(self): |
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"""Return the columns definitions""" |
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return self._columns |
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nicolargo /
glances
