316 lines
14 KiB
Python
316 lines
14 KiB
Python
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#!/usr/bin/env python3
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# node.py - PVC client function library, node 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 lib.ansiiprint as ansiiprint
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import lib.common as common
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def getInformationFromNode(zk_conn, node_name, long_output):
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node_daemon_state = zk_conn.get('/nodes/{}/daemonstate'.format(node_name))[0].decode('ascii')
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node_domain_state = zk_conn.get('/nodes/{}/domainstate'.format(node_name))[0].decode('ascii')
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node_cpu_count = zk_conn.get('/nodes/{}/staticdata'.format(node_name))[0].decode('ascii').split()[0]
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node_kernel = zk_conn.get('/nodes/{}/staticdata'.format(node_name))[0].decode('ascii').split()[1]
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node_os = zk_conn.get('/nodes/{}/staticdata'.format(node_name))[0].decode('ascii').split()[2]
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node_arch = zk_conn.get('/nodes/{}/staticdata'.format(node_name))[0].decode('ascii').split()[3]
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node_mem_used = zk_conn.get('/nodes/{}/memused'.format(node_name))[0].decode('ascii')
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node_mem_free = zk_conn.get('/nodes/{}/memfree'.format(node_name))[0].decode('ascii')
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node_mem_total = int(node_mem_used) + int(node_mem_free)
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node_load = zk_conn.get('/nodes/{}/cpuload'.format(node_name))[0].decode('ascii')
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node_domains_count = zk_conn.get('/nodes/{}/domainscount'.format(node_name))[0].decode('ascii')
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node_running_domains = zk_conn.get('/nodes/{}/runningdomains'.format(node_name))[0].decode('ascii').split()
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node_mem_allocated = 0
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for domain in node_running_domains:
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try:
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parsed_xml = common.getDomainXML(zk_conn, domain)
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duuid, dname, ddescription, dmemory, dvcpu, dvcputopo = common.getDomainMainDetails(parsed_xml)
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node_mem_allocated += int(dmemory)
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except AttributeError:
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click.echo('Error: Domain {} does not exist.'.format(domain))
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if node_daemon_state == 'run':
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daemon_state_colour = ansiiprint.green()
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elif node_daemon_state == 'stop':
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daemon_state_colour = ansiiprint.red()
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elif node_daemon_state == 'init':
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daemon_state_colour = ansiiprint.yellow()
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elif node_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 node_domain_state == 'ready':
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domain_state_colour = ansiiprint.green()
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else:
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domain_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('{}Hypervisor Node 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(), node_name))
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ainformation.append('{}Daemon State:{} {}{}{}'.format(ansiiprint.purple(), ansiiprint.end(), daemon_state_colour, node_daemon_state, ansiiprint.end()))
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ainformation.append('{}Domain State:{} {}{}{}'.format(ansiiprint.purple(), ansiiprint.end(), domain_state_colour, node_domain_state, ansiiprint.end()))
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ainformation.append('{}Active VM Count:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_domains_count))
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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(), node_arch))
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ainformation.append('{}Operating System:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_os))
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ainformation.append('{}Kernel Version:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_kernel))
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ainformation.append('')
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ainformation.append('{}CPUs:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_cpu_count))
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ainformation.append('{}Load:{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_load))
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ainformation.append('{}Total RAM (MiB):{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_mem_total))
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ainformation.append('{}Used RAM (MiB):{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_mem_used))
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ainformation.append('{}Free RAM (MiB):{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_mem_free))
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ainformation.append('{}Allocated RAM (MiB):{} {}'.format(ansiiprint.purple(), ansiiprint.end(), node_mem_allocated))
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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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# Get the list of valid target hypervisors
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def getHypervisors(zk_conn, dom_uuid):
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valid_hypervisor_list = []
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full_hypervisor_list = zk_conn.get_children('/nodes')
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try:
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current_hypervisor = zk_conn.get('/domains/{}/hypervisor'.format(dom_uuid))[0].decode('ascii')
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except:
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current_hypervisor = None
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for hypervisor in full_hypervisor_list:
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daemon_state = zk_conn.get('/nodes/{}/daemonstate'.format(hypervisor))[0].decode('ascii')
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domain_state = zk_conn.get('/nodes/{}/domainstate'.format(hypervisor))[0].decode('ascii')
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if hypervisor == current_hypervisor:
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continue
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if daemon_state != 'run' or domain_state != 'ready':
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continue
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valid_hypervisor_list.append(hypervisor)
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return valid_hypervisor_list
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#
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# Direct Functions
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#
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def flush_node(zk_conn, node, wait):
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# Verify node is valid
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verifyNode(zk_conn, node)
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click.echo('Flushing hypervisor {} of running VMs.'.format(node))
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# Add the new domain to Zookeeper
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transaction = zk_conn.transaction()
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transaction.set_data('/nodes/{}/domainstate'.format(node), 'flush'.encode('ascii'))
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results = transaction.commit()
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if wait == True:
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while True:
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time.sleep(1)
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node_state = zk_conn.get('/nodes/{}/domainstate'.format(node))[0].decode('ascii')
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if node_state == "flushed":
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break
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return True, ''
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def ready_node(zk_conn, node):
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# Verify node is valid
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verifyNode(zk_conn, node)
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click.echo('Restoring hypervisor {} to active service.'.format(node))
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# Add the new domain to Zookeeper
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transaction = zk_conn.transaction()
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transaction.set_data('/nodes/{}/domainstate'.format(node), 'unflush'.encode('ascii'))
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results = transaction.commit()
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return True, ''
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def get_info(zk_conn, node, long_output):
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# Verify node is valid
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verifyNode(zk_conn, node)
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# Get information about node in a pretty format
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information = getInformationFromNode(zk_conn, node, long_output)
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if information == None:
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common.stopZKConnection(zk_conn)
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return False, 'ERROR: Could not find a node matching that name.'
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click.echo(information)
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if long_output == True:
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click.echo('')
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click.echo('{}Virtual machines on node:{}'.format(ansiiprint.bold(), ansiiprint.end()))
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# List all VMs on this node
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common.get_list(zk_conn, node, None)
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click.echo('')
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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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node_list = []
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full_node_list = zk_conn.get_children('/nodes')
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for node in full_node_list:
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if limit != None:
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try:
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if re.match(limit, node) == 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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node_list.append(node)
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node_list_output = []
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node_daemon_state = {}
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node_daemon_state = {}
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node_domain_state = {}
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node_cpu_count = {}
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node_mem_used = {}
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node_mem_free = {}
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node_mem_total = {}
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node_domains_count = {}
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node_running_domains = {}
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node_mem_allocated = {}
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node_load = {}
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# Gather information for printing
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for node_name in node_list:
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node_daemon_state[node_name] = zk_conn.get('/nodes/{}/daemonstate'.format(node_name))[0].decode('ascii')
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node_domain_state[node_name] = zk_conn.get('/nodes/{}/domainstate'.format(node_name))[0].decode('ascii')
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node_cpu_count[node_name] = zk_conn.get('/nodes/{}/staticdata'.format(node_name))[0].decode('ascii').split()[0]
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node_mem_used[node_name] = zk_conn.get('/nodes/{}/memused'.format(node_name))[0].decode('ascii')
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node_mem_free[node_name] = zk_conn.get('/nodes/{}/memfree'.format(node_name))[0].decode('ascii')
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node_mem_total[node_name] = int(node_mem_used[node_name]) + int(node_mem_free[node_name])
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node_load[node_name] = zk_conn.get('/nodes/{}/cpuload'.format(node_name))[0].decode('ascii')
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node_domains_count[node_name] = zk_conn.get('/nodes/{}/domainscount'.format(node_name))[0].decode('ascii')
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node_running_domains[node_name] = zk_conn.get('/nodes/{}/runningdomains'.format(node_name))[0].decode('ascii').split()
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node_mem_allocated[node_name] = 0
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for domain in node_running_domains[node_name]:
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try:
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parsed_xml = common.getDomainXML(zk_conn, domain)
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duuid, dname, ddescription, dmemory, dvcpu, dvcputopo = common.getDomainMainDetails(parsed_xml)
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node_mem_allocated[node_name] += int(dmemory)
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except AttributeError:
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click.echo('Error: Domain {} does not exist.'.format(domain))
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# Determine optimal column widths
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# Dynamic columns: node_name, hypervisor, migrated
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node_name_length = 0
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for node_name in node_list:
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# node_name column
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_node_name_length = len(node_name) + 1
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if _node_name_length > node_name_length:
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node_name_length = _node_name_length
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# Format the string (header)
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node_list_output.append(
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'{bold}{node_name: <{node_name_length}} \
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State: {daemon_state_colour}{node_daemon_state: <7}{end_colour} {domain_state_colour}{node_domain_state: <8}{end_colour} \
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Resources: {node_domains_count: <4} {node_cpu_count: <5} {node_load: <6} \
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RAM (MiB): {node_mem_total: <6} {node_mem_used: <6} {node_mem_free: <6} {node_mem_allocated: <6}{end_bold}'.format(
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node_name_length=node_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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domain_state_colour='',
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end_colour='',
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node_name='Name',
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node_daemon_state='Daemon',
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node_domain_state='Domains',
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node_domains_count='VMs',
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node_cpu_count='CPUs',
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node_load='Load',
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node_mem_total='Total',
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node_mem_used='Used',
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node_mem_free='Free',
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node_mem_allocated='VMs',
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)
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)
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# Format the string (elements)
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for node_name in node_list:
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if node_daemon_state[node_name] == 'run':
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daemon_state_colour = ansiiprint.green()
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elif node_daemon_state[node_name] == 'stop':
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daemon_state_colour = ansiiprint.red()
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elif node_daemon_state[node_name] == 'init':
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daemon_state_colour = ansiiprint.yellow()
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elif node_daemon_state[node_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 node_mem_allocated[node_name] >= node_mem_total[node_name]:
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node_domain_state[node_name] = 'overprov'
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domain_state_colour = ansiiprint.yellow()
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elif node_domain_state[node_name] == 'ready':
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domain_state_colour = ansiiprint.green()
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else:
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domain_state_colour = ansiiprint.blue()
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node_list_output.append(
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'{bold}{node_name: <{node_name_length}} \
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{daemon_state_colour}{node_daemon_state: <7}{end_colour} {domain_state_colour}{node_domain_state: <8}{end_colour} \
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{node_domains_count: <4} {node_cpu_count: <5} {node_load: <6} \
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{node_mem_total: <6} {node_mem_used: <6} {node_mem_free: <6} {node_mem_allocated: <6}{end_bold}'.format(
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node_name_length=node_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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domain_state_colour=domain_state_colour,
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end_colour=ansiiprint.end(),
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node_name=node_name,
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node_daemon_state=node_daemon_state[node_name],
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node_domain_state=node_domain_state[node_name],
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node_domains_count=node_domains_count[node_name],
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node_cpu_count=node_cpu_count[node_name],
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node_load=node_load[node_name],
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node_mem_total=node_mem_total[node_name],
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node_mem_used=node_mem_used[node_name],
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node_mem_free=node_mem_free[node_name],
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node_mem_allocated=node_mem_allocated[node_name]
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)
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)
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click.echo('\n'.join(sorted(node_list_output)))
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|
|
||
|
|
return True, ''
|