376 lines
16 KiB
Python
376 lines
16 KiB
Python
#!/usr/bin/env python3
|
|
|
|
# node.py - PVC client function library, node management
|
|
# Part of the Parallel Virtual Cluster (PVC) system
|
|
#
|
|
# Copyright (C) 2018 Joshua M. Boniface <joshua@boniface.me>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
#
|
|
###############################################################################
|
|
|
|
import os
|
|
import socket
|
|
import time
|
|
import uuid
|
|
import re
|
|
import tempfile
|
|
import subprocess
|
|
import difflib
|
|
import colorama
|
|
import click
|
|
import lxml.objectify
|
|
import configparser
|
|
import kazoo.client
|
|
|
|
import client_lib.ansiprint as ansiprint
|
|
import client_lib.zkhandler as zkhandler
|
|
import client_lib.common as common
|
|
import client_lib.vm as pvc_vm
|
|
|
|
def getInformationFromNode(zk_conn, node_name, long_output):
|
|
node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
|
|
node_router_state = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node_name))
|
|
node_domain_state = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node_name))
|
|
node_static_data = zkhandler.readdata(zk_conn, '/nodes/{}/staticdata'.format(node_name)).split()
|
|
node_cpu_count = node_static_data[0]
|
|
node_kernel = node_static_data[1]
|
|
node_os = node_static_data[2]
|
|
node_arch = node_static_data[3]
|
|
node_mem_allocated = int(zkhandler.readdata(zk_conn, '/nodes/{}/memalloc'.format(node_name)))
|
|
node_mem_used = int(zkhandler.readdata(zk_conn, '/nodes/{}/memused'.format(node_name)))
|
|
node_mem_free = int(zkhandler.readdata(zk_conn, '/nodes/{}/memfree'.format(node_name)))
|
|
node_mem_total = node_mem_used + node_mem_free
|
|
node_load = zkhandler.readdata(zk_conn, '/nodes/{}/cpuload'.format(node_name))
|
|
node_domains_count = zkhandler.readdata(zk_conn, '/nodes/{}/domainscount'.format(node_name))
|
|
node_running_domains = zkhandler.readdata(zk_conn, '/nodes/{}/runningdomains'.format(node_name)).split()
|
|
|
|
if node_daemon_state == 'run':
|
|
daemon_state_colour = ansiprint.green()
|
|
elif node_daemon_state == 'stop':
|
|
daemon_state_colour = ansiprint.red()
|
|
elif node_daemon_state == 'init':
|
|
daemon_state_colour = ansiprint.yellow()
|
|
elif node_daemon_state == 'dead':
|
|
daemon_state_colour = ansiprint.red() + ansiprint.bold()
|
|
else:
|
|
daemon_state_colour = ansiprint.blue()
|
|
|
|
if node_router_state == 'primary':
|
|
router_state_colour = ansiprint.green()
|
|
elif node_router_state == 'secondary':
|
|
router_state_colour = ansiprint.blue()
|
|
else:
|
|
router_state_colour = ansiprint.purple()
|
|
|
|
if node_domain_state == 'ready':
|
|
domain_state_colour = ansiprint.green()
|
|
else:
|
|
domain_state_colour = ansiprint.blue()
|
|
|
|
# Format a nice output; do this line-by-line then concat the elements at the end
|
|
ainformation = []
|
|
ainformation.append('{}Node information:{}'.format(ansiprint.bold(), ansiprint.end()))
|
|
ainformation.append('')
|
|
# Basic information
|
|
ainformation.append('{}Name:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_name))
|
|
ainformation.append('{}Daemon State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), daemon_state_colour, node_daemon_state, ansiprint.end()))
|
|
ainformation.append('{}Router State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), router_state_colour, node_router_state, ansiprint.end()))
|
|
ainformation.append('{}Domain State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), domain_state_colour, node_domain_state, ansiprint.end()))
|
|
ainformation.append('{}Active VM Count:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_domains_count))
|
|
if long_output == True:
|
|
ainformation.append('')
|
|
ainformation.append('{}Architecture:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_arch))
|
|
ainformation.append('{}Operating System:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_os))
|
|
ainformation.append('{}Kernel Version:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_kernel))
|
|
ainformation.append('')
|
|
ainformation.append('{}CPUs:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_cpu_count))
|
|
ainformation.append('{}Load:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_load))
|
|
ainformation.append('{}Total RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_mem_total))
|
|
ainformation.append('{}Used RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_mem_used))
|
|
ainformation.append('{}Free RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_mem_free))
|
|
ainformation.append('{}Allocated RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_mem_allocated))
|
|
|
|
# Join it all together
|
|
information = '\n'.join(ainformation)
|
|
return information
|
|
|
|
#
|
|
# Direct Functions
|
|
#
|
|
def secondary_node(zk_conn, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zk_conn, node):
|
|
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
|
|
|
|
# Ensure node is a coordinator
|
|
daemon_mode = zkhandler.readdata(zk_conn, '/nodes/{}/daemonmode'.format(node))
|
|
if daemon_mode == 'hypervisor':
|
|
return False, 'ERROR: Cannot change router mode on non-coordinator node "{}"'.format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node))
|
|
if current_state == 'primary':
|
|
click.echo('Setting node {} in secondary router mode.'.format(node))
|
|
zkhandler.writedata(zk_conn, {
|
|
'/primary_node': 'none'
|
|
})
|
|
else:
|
|
click.echo('Node {} is already in secondary router mode.'.format(node))
|
|
|
|
return True, ''
|
|
|
|
def primary_node(zk_conn, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zk_conn, node):
|
|
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
|
|
|
|
# Ensure node is a coordinator
|
|
daemon_mode = zkhandler.readdata(zk_conn, '/nodes/{}/daemonmode'.format(node))
|
|
if daemon_mode == 'hypervisor':
|
|
return False, 'ERROR: Cannot change router mode on non-coordinator node "{}"'.format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node))
|
|
if current_state == 'secondary':
|
|
click.echo('Setting node {} in primary router mode.'.format(node))
|
|
zkhandler.writedata(zk_conn, {
|
|
'/primary_node': node
|
|
})
|
|
else:
|
|
click.echo('Node {} is already in primary router mode.'.format(node))
|
|
|
|
return True, ''
|
|
|
|
def flush_node(zk_conn, node, wait):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zk_conn, node):
|
|
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
|
|
|
|
click.echo('Flushing hypervisor {} of running VMs.'.format(node))
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.writedata(zk_conn, {
|
|
'/nodes/{}/domainstate'.format(node): 'flush'
|
|
})
|
|
|
|
if wait == True:
|
|
while True:
|
|
time.sleep(1)
|
|
node_state = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node))
|
|
if node_state == "flushed":
|
|
break
|
|
|
|
return True, ''
|
|
|
|
def ready_node(zk_conn, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zk_conn, node):
|
|
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
|
|
|
|
click.echo('Restoring hypervisor {} to active service.'.format(node))
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.writedata(zk_conn, {
|
|
'/nodes/{}/domainstate'.format(node): 'unflush'
|
|
})
|
|
|
|
return True, ''
|
|
|
|
def get_info(zk_conn, node, long_output):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zk_conn, node):
|
|
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
|
|
|
|
# Get information about node in a pretty format
|
|
information = getInformationFromNode(zk_conn, node, long_output)
|
|
|
|
if information == None:
|
|
return False, 'ERROR: Could not find a node matching that name.'
|
|
|
|
click.echo(information)
|
|
|
|
if long_output == True:
|
|
click.echo('')
|
|
click.echo('{}Virtual machines on node:{}'.format(ansiprint.bold(), ansiprint.end()))
|
|
click.echo('')
|
|
# List all VMs on this node
|
|
pvc_vm.get_list(zk_conn, node, None)
|
|
|
|
click.echo('')
|
|
|
|
return True, ''
|
|
|
|
def get_list(zk_conn, limit):
|
|
# Match our limit
|
|
node_list = []
|
|
full_node_list = zk_conn.get_children('/nodes')
|
|
for node in full_node_list:
|
|
if limit != None:
|
|
try:
|
|
# Implcitly assume fuzzy limits
|
|
if re.match('\^.*', limit) == None:
|
|
limit = '.*' + limit
|
|
if re.match('.*\$', limit) == None:
|
|
limit = limit + '.*'
|
|
|
|
if re.match(limit, node) != None:
|
|
node_list.append(node)
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
node_list.append(node)
|
|
|
|
node_list_output = []
|
|
node_daemon_state = {}
|
|
node_router_state = {}
|
|
node_domain_state = {}
|
|
node_cpu_count = {}
|
|
node_mem_used = {}
|
|
node_mem_free = {}
|
|
node_mem_total = {}
|
|
node_domains_count = {}
|
|
node_running_domains = {}
|
|
node_mem_allocated = {}
|
|
node_load = {}
|
|
|
|
# Gather information for printing
|
|
for node_name in node_list:
|
|
node_daemon_state[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
|
|
node_router_state[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node_name))
|
|
node_domain_state[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node_name))
|
|
node_cpu_count[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/staticdata'.format(node_name)).split()[0]
|
|
node_mem_allocated[node_name] = int(zkhandler.readdata(zk_conn, '/nodes/{}/memalloc'.format(node_name)))
|
|
node_mem_used[node_name] = int(zkhandler.readdata(zk_conn, '/nodes/{}/memused'.format(node_name)))
|
|
node_mem_free[node_name] = int(zkhandler.readdata(zk_conn, '/nodes/{}/memfree'.format(node_name)))
|
|
node_mem_total[node_name] = node_mem_used[node_name] + node_mem_free[node_name]
|
|
node_load[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/cpuload'.format(node_name))
|
|
node_domains_count[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/domainscount'.format(node_name))
|
|
node_running_domains[node_name] = zkhandler.readdata(zk_conn, '/nodes/{}/runningdomains'.format(node_name)).split()
|
|
|
|
# Determine optimal column widths
|
|
# Dynamic columns: node_name, daemon_state, network_state, domain_state, load
|
|
node_name_length = 5
|
|
daemon_state_length = 7
|
|
router_state_length = 7
|
|
domain_state_length = 9
|
|
for node_name in node_list:
|
|
# node_name column
|
|
_node_name_length = len(node_name) + 1
|
|
if _node_name_length > node_name_length:
|
|
node_name_length = _node_name_length
|
|
# daemon_state column
|
|
_daemon_state_length = len(node_daemon_state[node_name]) + 1
|
|
if _daemon_state_length > daemon_state_length:
|
|
daemon_state_length = _daemon_state_length
|
|
# router_state column
|
|
_router_state_length = len(node_router_state[node_name]) + 1
|
|
if _router_state_length > router_state_length:
|
|
router_state_length = _router_state_length
|
|
# domain_state column
|
|
_domain_state_length = len(node_domain_state[node_name]) + 1
|
|
if _domain_state_length > domain_state_length:
|
|
domain_state_length = _domain_state_length
|
|
|
|
# Format the string (header)
|
|
node_list_output.append(
|
|
'{bold}{node_name: <{node_name_length}} \
|
|
State: {daemon_state_colour}{node_daemon_state: <{daemon_state_length}}{end_colour} {router_state_colour}{node_router_state: <{router_state_length}}{end_colour} {domain_state_colour}{node_domain_state: <{domain_state_length}}{end_colour} \
|
|
Resources: {node_domains_count: <4} {node_cpu_count: <5} {node_load: <6} \
|
|
RAM (MiB): {node_mem_total: <6} {node_mem_used: <6} {node_mem_free: <6} {node_mem_allocated: <6}{end_bold}'.format(
|
|
node_name_length=node_name_length,
|
|
daemon_state_length=daemon_state_length,
|
|
router_state_length=router_state_length,
|
|
domain_state_length=domain_state_length,
|
|
bold=ansiprint.bold(),
|
|
end_bold=ansiprint.end(),
|
|
daemon_state_colour='',
|
|
router_state_colour='',
|
|
domain_state_colour='',
|
|
end_colour='',
|
|
node_name='Name',
|
|
node_daemon_state='Daemon',
|
|
node_router_state='Router',
|
|
node_domain_state='Domain',
|
|
node_domains_count='VMs',
|
|
node_cpu_count='CPUs',
|
|
node_load='Load',
|
|
node_mem_total='Total',
|
|
node_mem_used='Used',
|
|
node_mem_free='Free',
|
|
node_mem_allocated='VMs'
|
|
)
|
|
)
|
|
|
|
# Format the string (elements)
|
|
for node_name in node_list:
|
|
if node_daemon_state[node_name] == 'run':
|
|
daemon_state_colour = ansiprint.green()
|
|
elif node_daemon_state[node_name] == 'stop':
|
|
daemon_state_colour = ansiprint.red()
|
|
elif node_daemon_state[node_name] == 'init':
|
|
daemon_state_colour = ansiprint.yellow()
|
|
elif node_daemon_state[node_name] == 'dead':
|
|
daemon_state_colour = ansiprint.red() + ansiprint.bold()
|
|
else:
|
|
daemon_state_colour = ansiprint.blue()
|
|
|
|
if node_router_state[node_name] == 'primary':
|
|
router_state_colour = ansiprint.green()
|
|
elif node_router_state[node_name] == 'secondary':
|
|
router_state_colour = ansiprint.blue()
|
|
else:
|
|
router_state_colour = ansiprint.purple()
|
|
|
|
if node_mem_allocated[node_name] != 0 and node_mem_allocated[node_name] >= node_mem_total[node_name]:
|
|
node_domain_state[node_name] = 'overprov'
|
|
domain_state_colour = ansiprint.yellow()
|
|
elif node_domain_state[node_name] == 'ready':
|
|
domain_state_colour = ansiprint.green()
|
|
else:
|
|
domain_state_colour = ansiprint.blue()
|
|
|
|
node_list_output.append(
|
|
'{bold}{node_name: <{node_name_length}} \
|
|
{daemon_state_colour}{node_daemon_state: <{daemon_state_length}}{end_colour} {router_state_colour}{node_router_state: <{router_state_length}}{end_colour} {domain_state_colour}{node_domain_state: <{domain_state_length}}{end_colour} \
|
|
{node_domains_count: <4} {node_cpu_count: <5} {node_load: <6} \
|
|
{node_mem_total: <6} {node_mem_used: <6} {node_mem_free: <6} {node_mem_allocated: <6}{end_bold}'.format(
|
|
node_name_length=node_name_length,
|
|
daemon_state_length=daemon_state_length,
|
|
router_state_length=router_state_length,
|
|
domain_state_length=domain_state_length,
|
|
bold='',
|
|
end_bold='',
|
|
daemon_state_colour=daemon_state_colour,
|
|
router_state_colour=router_state_colour,
|
|
domain_state_colour=domain_state_colour,
|
|
end_colour=ansiprint.end(),
|
|
node_name=node_name,
|
|
node_daemon_state=node_daemon_state[node_name],
|
|
node_router_state=node_router_state[node_name],
|
|
node_domain_state=node_domain_state[node_name],
|
|
node_domains_count=node_domains_count[node_name],
|
|
node_cpu_count=node_cpu_count[node_name],
|
|
node_load=node_load[node_name],
|
|
node_mem_total=node_mem_total[node_name],
|
|
node_mem_used=node_mem_used[node_name],
|
|
node_mem_free=node_mem_free[node_name],
|
|
node_mem_allocated=node_mem_allocated[node_name]
|
|
)
|
|
)
|
|
|
|
click.echo('\n'.join(sorted(node_list_output)))
|
|
|
|
return True, ''
|