211 lines
9.1 KiB
Python
211 lines
9.1 KiB
Python
#!/usr/bin/env python3
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# router.py - PVC client function library, router management
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU 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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# This program 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import os
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import socket
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import time
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import uuid
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import re
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import tempfile
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import subprocess
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import difflib
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import colorama
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import click
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import lxml.objectify
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import configparser
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import kazoo.client
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import client_lib.ansiiprint as ansiiprint
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import client_lib.zkhandler as zkhandler
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import client_lib.common as common
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def getInformationFromRouter(zk_conn, router_name, long_output):
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router_daemon_state = zk_conn.get('/routers/{}/daemonstate'.format(router_name))[0].decode('ascii')
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router_network_state = zk_conn.get('/routers/{}/networkstate'.format(router_name))[0].decode('ascii')
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router_cpu_count = zk_conn.get('/routers/{}/staticdata'.format(router_name))[0].decode('ascii').split()[0]
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router_cpu_load = zk_conn.get('/routers/{}/cpuload'.format(router_name))[0].decode('ascii').split()[0]
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router_kernel = zk_conn.get('/routers/{}/staticdata'.format(router_name))[0].decode('ascii').split()[1]
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router_os = zk_conn.get('/routers/{}/staticdata'.format(router_name))[0].decode('ascii').split()[2]
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router_arch = zk_conn.get('/routers/{}/staticdata'.format(router_name))[0].decode('ascii').split()[3]
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if router_daemon_state == 'run':
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daemon_state_colour = ansiiprint.green()
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elif router_daemon_state == 'stop':
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daemon_state_colour = ansiiprint.red()
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elif router_daemon_state == 'init':
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daemon_state_colour = ansiiprint.yellow()
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elif router_daemon_state == 'dead':
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daemon_state_colour = ansiiprint.red() + ansiiprint.bold()
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else:
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daemon_state_colour = ansiiprint.blue()
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if router_network_state == 'primary':
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network_state_colour = ansiiprint.green()
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else:
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network_state_colour = ansiiprint.blue()
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# Format a nice output; do this line-by-line then concat the elements at the end
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ainformation = []
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ainformation.append('{}Router information:{}'.format(ansiiprint.bold(), ansiiprint.end()))
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ainformation.append('')
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# Basic information
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ainformation.append('{}Name:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_name))
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ainformation.append('{}Daemon State:{} {}{}{}'.format(ansiiprint.purple(), ansiiprint.end(), daemon_state_colour, router_daemon_state, ansiiprint.end()))
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ainformation.append('{}Network State:{} {}{}{}'.format(ansiiprint.purple(), ansiiprint.end(), network_state_colour, router_network_state, ansiiprint.end()))
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ainformation.append('{}CPUs:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_cpu_count))
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ainformation.append('{}Load:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_cpu_load))
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if long_output == True:
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ainformation.append('')
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ainformation.append('{}Architecture:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_arch))
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ainformation.append('{}Operating System:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_os))
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ainformation.append('{}Kernel Version:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), router_kernel))
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# Join it all together
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information = '\n'.join(ainformation)
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return information
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#
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# Direct Functions
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#
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def secondary_router(zk_conn, router):
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# Verify router is valid
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if not common.verifyRouter(zk_conn, router):
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return False, 'ERROR: No router named "{}" is present in the cluster.'.format(router)
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click.echo('Setting router {} in secondary mode.'.format(router))
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zkhandler.writedata(zk_conn, { '/routers/{}/networkstate'.format(router): 'secondary' })
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return True, ''
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def primary_router(zk_conn, router):
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# Verify router is valid
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if not common.verifyRouter(zk_conn, router):
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return False, 'ERROR: No router named "{}" is present in the cluster.'.format(router)
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click.echo('Setting router {} in primary mode.'.format(router))
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zkhandler.writedata(zk_conn, { '/routers/{}/networkstate'.format(router): 'primary' })
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return True, ''
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def get_info(zk_conn, router, long_output):
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# Verify router is valid
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if not common.verifyRouter(zk_conn, router):
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return False, 'ERROR: No router named "{}" is present in the cluster.'.format(router)
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# Get information about router in a pretty format
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information = getInformationFromRouter(zk_conn, router, long_output)
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click.echo(information)
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return True, ''
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def get_list(zk_conn, limit):
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# Match our limit
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router_list = []
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full_router_list = zk_conn.get_children('/routers')
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for router in full_router_list:
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if limit != None:
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try:
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if re.match(limit, router) == None:
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continue
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except Exception as e:
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common.stopZKConnection(zk_conn)
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return False, 'Regex Error: {}'.format(e)
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router_list.append(router)
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router_list_output = []
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router_daemon_state = {}
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router_network_state = {}
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router_cpu_count = {}
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router_cpu_load = {}
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# Gather information for printing
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for router_name in router_list:
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router_daemon_state[router_name] = zk_conn.get('/routers/{}/daemonstate'.format(router_name))[0].decode('ascii')
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router_network_state[router_name] = zk_conn.get('/routers/{}/networkstate'.format(router_name))[0].decode('ascii')
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router_cpu_count[router_name] = zk_conn.get('/routers/{}/staticdata'.format(router_name))[0].decode('ascii').split()[0]
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router_cpu_load[router_name] = zk_conn.get('/routers/{}/cpuload'.format(router_name))[0].decode('ascii').split()[0]
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# Determine optimal column widths
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# Dynamic columns: router_name
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router_name_length = 0
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for router_name in router_list:
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# router_name column
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_router_name_length = len(router_name) + 1
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if _router_name_length > router_name_length:
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router_name_length = _router_name_length
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# Format the string (header)
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router_list_output.append(
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'{bold}{router_name: <{router_name_length}} \
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State: {daemon_state_colour}{router_daemon_state: <7}{end_colour} {network_state_colour}{router_network_state: <10}{end_colour} \
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Resources: {router_cpu_count: <5} {router_cpu_load: <6}{end_bold}'.format(
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router_name_length=router_name_length,
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bold=ansiiprint.bold(),
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end_bold=ansiiprint.end(),
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daemon_state_colour='',
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network_state_colour='',
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end_colour='',
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router_name='Name',
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router_daemon_state='Daemon',
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router_network_state='Network',
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router_cpu_count='CPUs',
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router_cpu_load='Load'
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)
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)
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# Format the string (elements)
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for router_name in router_list:
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if router_daemon_state[router_name] == 'run':
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daemon_state_colour = ansiiprint.green()
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elif router_daemon_state[router_name] == 'stop':
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daemon_state_colour = ansiiprint.red()
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elif router_daemon_state[router_name] == 'init':
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daemon_state_colour = ansiiprint.yellow()
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elif router_daemon_state[router_name] == 'dead':
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daemon_state_colour = ansiiprint.red() + ansiiprint.bold()
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else:
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daemon_state_colour = ansiiprint.blue()
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if router_network_state[router_name] == 'primary':
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network_state_colour = ansiiprint.green()
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else:
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network_state_colour = ansiiprint.blue()
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router_list_output.append(
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'{bold}{router_name: <{router_name_length}} \
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{daemon_state_colour}{router_daemon_state: <7}{end_colour} {network_state_colour}{router_network_state: <10}{end_colour} \
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{router_cpu_count: <5} {router_cpu_load: <6}{end_bold}'.format(
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router_name_length=router_name_length,
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bold='',
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end_bold='',
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daemon_state_colour=daemon_state_colour,
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network_state_colour=network_state_colour,
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end_colour=ansiiprint.end(),
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router_name=router_name,
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router_daemon_state=router_daemon_state[router_name],
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router_network_state=router_network_state[router_name],
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router_cpu_count=router_cpu_count[router_name],
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router_cpu_load=router_cpu_load[router_name]
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)
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)
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click.echo('\n'.join(sorted(router_list_output)))
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return True, ''
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