417 lines
19 KiB
Python
417 lines
19 KiB
Python
#!/usr/bin/env python3
|
|
|
|
# node.py - PVC client function library, node management
|
|
# Part of the Parallel Virtual Cluster (PVC) system
|
|
#
|
|
# Copyright (C) 2018-2020 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 daemon_lib.ansiprint as ansiprint
|
|
import daemon_lib.zkhandler as zkhandler
|
|
import daemon_lib.common as common
|
|
import daemon_lib.vm as pvc_vm
|
|
|
|
def getNodeInformation(zk_conn, node_name):
|
|
"""
|
|
Gather information about a node from the Zookeeper database and return a dict() containing it.
|
|
"""
|
|
node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
|
|
node_coordinator_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 = int(node_static_data[0])
|
|
node_kernel = node_static_data[1]
|
|
node_os = node_static_data[2]
|
|
node_arch = node_static_data[3]
|
|
node_vcpu_allocated = int(zkhandler.readdata(zk_conn, 'nodes/{}/vcpualloc'.format(node_name)))
|
|
node_mem_total = int(zkhandler.readdata(zk_conn, '/nodes/{}/memtotal'.format(node_name)))
|
|
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_load = float(zkhandler.readdata(zk_conn, '/nodes/{}/cpuload'.format(node_name)))
|
|
node_domains_count = int(zkhandler.readdata(zk_conn, '/nodes/{}/domainscount'.format(node_name)))
|
|
node_running_domains = zkhandler.readdata(zk_conn, '/nodes/{}/runningdomains'.format(node_name)).split()
|
|
|
|
# Construct a data structure to represent the data
|
|
node_information = {
|
|
'name': node_name,
|
|
'daemon_state': node_daemon_state,
|
|
'coordinator_state': node_coordinator_state,
|
|
'domain_state': node_domain_state,
|
|
'cpu_count': node_cpu_count,
|
|
'kernel': node_kernel,
|
|
'os': node_os,
|
|
'arch': node_arch,
|
|
'load': node_load,
|
|
'domains_count': node_domains_count,
|
|
'running_domains': node_running_domains,
|
|
'vcpu': {
|
|
'total': node_cpu_count,
|
|
'allocated': node_vcpu_allocated
|
|
},
|
|
'memory': {
|
|
'total': node_mem_total,
|
|
'allocated': node_mem_allocated,
|
|
'used': node_mem_used,
|
|
'free': node_mem_free
|
|
}
|
|
}
|
|
return node_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)
|
|
|
|
# Ensure node is in run daemonstate
|
|
daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node))
|
|
if daemon_state != 'run':
|
|
return False, 'ERROR: Node "{}" is not active'.format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node))
|
|
if current_state == 'primary':
|
|
retmsg = 'Setting node {} in secondary router mode.'.format(node)
|
|
zkhandler.writedata(zk_conn, {
|
|
'/primary_node': 'none'
|
|
})
|
|
else:
|
|
return False, 'Node "{}" is already in secondary router mode.'.format(node)
|
|
|
|
return True, retmsg
|
|
|
|
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)
|
|
|
|
# Ensure node is in run daemonstate
|
|
daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node))
|
|
if daemon_state != 'run':
|
|
return False, 'ERROR: Node "{}" is not active'.format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(node))
|
|
if current_state == 'secondary':
|
|
retmsg = 'Setting node {} in primary router mode.'.format(node)
|
|
zkhandler.writedata(zk_conn, {
|
|
'/primary_node': node
|
|
})
|
|
else:
|
|
return False, 'Node "{}" is already in primary router mode.'.format(node)
|
|
|
|
return True, retmsg
|
|
|
|
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)
|
|
|
|
retmsg = 'Flushing hypervisor {} of running VMs.'.format(node)
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.writedata(zk_conn, {
|
|
'/nodes/{}/domainstate'.format(node): 'flush'
|
|
})
|
|
|
|
# Wait cannot be triggered from the API
|
|
if wait:
|
|
while zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node)) == 'flush':
|
|
time.sleep(1)
|
|
retmsg = 'Flushed hypervisor {} of running VMs.'.format(node)
|
|
|
|
return True, retmsg
|
|
|
|
def ready_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)
|
|
|
|
retmsg = 'Restoring hypervisor {} to active service.'.format(node)
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.writedata(zk_conn, {
|
|
'/nodes/{}/domainstate'.format(node): 'unflush'
|
|
})
|
|
|
|
# Wait cannot be triggered from the API
|
|
if wait:
|
|
while zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node)) == 'unflush':
|
|
time.sleep(1)
|
|
retmsg = 'Restored hypervisor {} to active service.'.format(node)
|
|
|
|
return True, retmsg
|
|
|
|
def get_info(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)
|
|
|
|
# Get information about node in a pretty format
|
|
node_information = getNodeInformation(zk_conn, node)
|
|
if not node_information:
|
|
return False, 'ERROR: Could not get information about node "{}".'.format(node)
|
|
|
|
return True, node_information
|
|
|
|
def get_list(zk_conn, limit, is_fuzzy=True):
|
|
node_list = []
|
|
full_node_list = zkhandler.listchildren(zk_conn, '/nodes')
|
|
|
|
for node in full_node_list:
|
|
if limit:
|
|
try:
|
|
if not is_fuzzy:
|
|
limit = '^' + limit + '$'
|
|
|
|
if re.match(limit, node):
|
|
node_list.append(getNodeInformation(zk_conn, node))
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
node_list.append(getNodeInformation(zk_conn, node))
|
|
|
|
return True, node_list
|
|
|
|
#
|
|
# CLI-specific functions
|
|
#
|
|
def getOutputColours(node_information):
|
|
if node_information['daemon_state'] == 'run':
|
|
daemon_state_colour = ansiprint.green()
|
|
elif node_information['daemon_state'] == 'stop':
|
|
daemon_state_colour = ansiprint.red()
|
|
elif node_information['daemon_state'] == 'shutdown':
|
|
daemon_state_colour = ansiprint.yellow()
|
|
elif node_information['daemon_state'] == 'init':
|
|
daemon_state_colour = ansiprint.yellow()
|
|
elif node_information['daemon_state'] == 'dead':
|
|
daemon_state_colour = ansiprint.red() + ansiprint.bold()
|
|
else:
|
|
daemon_state_colour = ansiprint.blue()
|
|
|
|
if node_information['coordinator_state'] == 'primary':
|
|
coordinator_state_colour = ansiprint.green()
|
|
elif node_information['coordinator_state'] == 'secondary':
|
|
coordinator_state_colour = ansiprint.blue()
|
|
else:
|
|
coordinator_state_colour = ansiprint.cyan()
|
|
|
|
if node_information['domain_state'] == 'ready':
|
|
domain_state_colour = ansiprint.green()
|
|
else:
|
|
domain_state_colour = ansiprint.blue()
|
|
|
|
return daemon_state_colour, coordinator_state_colour, domain_state_colour
|
|
|
|
def format_info(node_information, long_output):
|
|
daemon_state_colour, coordinator_state_colour, domain_state_colour = getOutputColours(node_information)
|
|
|
|
# Format a nice output; do this line-by-line then concat the elements at the end
|
|
ainformation = []
|
|
# Basic information
|
|
ainformation.append('{}Name:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['name']))
|
|
ainformation.append('{}Daemon State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), daemon_state_colour, node_information['daemon_state'], ansiprint.end()))
|
|
ainformation.append('{}Coordinator State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), coordinator_state_colour, node_information['coordinator_state'], ansiprint.end()))
|
|
ainformation.append('{}Domain State:{} {}{}{}'.format(ansiprint.purple(), ansiprint.end(), domain_state_colour, node_information['domain_state'], ansiprint.end()))
|
|
ainformation.append('{}Active VM Count:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['domains_count']))
|
|
if long_output:
|
|
ainformation.append('')
|
|
ainformation.append('{}Architecture:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['arch']))
|
|
ainformation.append('{}Operating System:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['os']))
|
|
ainformation.append('{}Kernel Version:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['kernel']))
|
|
ainformation.append('')
|
|
ainformation.append('{}Host CPUs:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['vcpu']['total']))
|
|
ainformation.append('{}vCPUs:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['vcpu']['allocated']))
|
|
ainformation.append('{}Load:{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['load']))
|
|
ainformation.append('{}Total RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['memory']['total']))
|
|
ainformation.append('{}Used RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['memory']['used']))
|
|
ainformation.append('{}Free RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['memory']['free']))
|
|
ainformation.append('{}Allocated RAM (MiB):{} {}'.format(ansiprint.purple(), ansiprint.end(), node_information['memory']['allocated']))
|
|
|
|
# Join it all together
|
|
information = '\n'.join(ainformation)
|
|
click.echo(information)
|
|
|
|
click.echo('')
|
|
|
|
def format_list(node_list):
|
|
node_list_output = []
|
|
|
|
# Determine optimal column widths
|
|
node_name_length = 5
|
|
daemon_state_length = 7
|
|
coordinator_state_length = 12
|
|
domain_state_length = 8
|
|
domains_count_length = 4
|
|
cpu_count_length = 6
|
|
load_length = 5
|
|
mem_total_length = 6
|
|
mem_used_length = 5
|
|
mem_free_length = 5
|
|
mem_alloc_length = 4
|
|
for node_information in node_list:
|
|
# node_name column
|
|
_node_name_length = len(node_information['name']) + 1
|
|
if _node_name_length > node_name_length:
|
|
node_name_length = _node_name_length
|
|
# daemon_state column
|
|
_daemon_state_length = len(node_information['daemon_state']) + 1
|
|
if _daemon_state_length > daemon_state_length:
|
|
daemon_state_length = _daemon_state_length
|
|
# coordinator_state column
|
|
_coordinator_state_length = len(node_information['coordinator_state']) + 1
|
|
if _coordinator_state_length > coordinator_state_length:
|
|
coordinator_state_length = _coordinator_state_length
|
|
# domain_state column
|
|
_domain_state_length = len(node_information['domain_state']) + 1
|
|
if _domain_state_length > domain_state_length:
|
|
domain_state_length = _domain_state_length
|
|
# domains_count column
|
|
_domains_count_length = len(str(node_information['domains_count'])) + 1
|
|
if _domains_count_length > domains_count_length:
|
|
domains_count_length = _domains_count_length
|
|
# cpu_count column
|
|
_cpu_count_length = len(str(node_information['cpu_count'])) + 1
|
|
if _cpu_count_length > cpu_count_length:
|
|
cpu_count_length = _cpu_count_length
|
|
# load column
|
|
_load_length = len(str(node_information['load'])) + 1
|
|
if _load_length > load_length:
|
|
load_length = _load_length
|
|
# mem_total column
|
|
_mem_total_length = len(str(node_information['memory']['total'])) + 1
|
|
if _mem_total_length > mem_total_length:
|
|
mem_total_length = _mem_total_length
|
|
# mem_used column
|
|
_mem_used_length = len(str(node_information['memory']['used'])) + 1
|
|
if _mem_used_length > mem_used_length:
|
|
mem_used_length = _mem_used_length
|
|
# mem_free column
|
|
_mem_free_length = len(str(node_information['memory']['free'])) + 1
|
|
if _mem_free_length > mem_free_length:
|
|
mem_free_length = _mem_free_length
|
|
# mem_alloc column
|
|
_mem_alloc_length = len(str(node_information['memory']['allocated'])) + 1
|
|
if _mem_alloc_length > mem_alloc_length:
|
|
mem_alloc_length = _mem_alloc_length
|
|
|
|
# Format the string (header)
|
|
node_list_output.append(
|
|
'{bold}{node_name: <{node_name_length}} \
|
|
St: {daemon_state_colour}{node_daemon_state: <{daemon_state_length}}{end_colour} {coordinator_state_colour}{node_coordinator_state: <{coordinator_state_length}}{end_colour} {domain_state_colour}{node_domain_state: <{domain_state_length}}{end_colour} \
|
|
Res: {node_domains_count: <{domains_count_length}} {node_cpu_count: <{cpu_count_length}} {node_load: <{load_length}} \
|
|
Mem (M): {node_mem_total: <{mem_total_length}} {node_mem_used: <{mem_used_length}} {node_mem_free: <{mem_free_length}} {node_mem_allocated: <{mem_alloc_length}}{end_bold}'.format(
|
|
node_name_length=node_name_length,
|
|
daemon_state_length=daemon_state_length,
|
|
coordinator_state_length=coordinator_state_length,
|
|
domain_state_length=domain_state_length,
|
|
domains_count_length=domains_count_length,
|
|
cpu_count_length=cpu_count_length,
|
|
load_length=load_length,
|
|
mem_total_length=mem_total_length,
|
|
mem_used_length=mem_used_length,
|
|
mem_free_length=mem_free_length,
|
|
mem_alloc_length=mem_alloc_length,
|
|
bold=ansiprint.bold(),
|
|
end_bold=ansiprint.end(),
|
|
daemon_state_colour='',
|
|
coordinator_state_colour='',
|
|
domain_state_colour='',
|
|
end_colour='',
|
|
node_name='Name',
|
|
node_daemon_state='Daemon',
|
|
node_coordinator_state='Coordinator',
|
|
node_domain_state='Domain',
|
|
node_domains_count='VMs',
|
|
node_cpu_count='vCPUs',
|
|
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_information in node_list:
|
|
daemon_state_colour, coordinator_state_colour, domain_state_colour = getOutputColours(node_information)
|
|
node_list_output.append(
|
|
'{bold}{node_name: <{node_name_length}} \
|
|
{daemon_state_colour}{node_daemon_state: <{daemon_state_length}}{end_colour} {coordinator_state_colour}{node_coordinator_state: <{coordinator_state_length}}{end_colour} {domain_state_colour}{node_domain_state: <{domain_state_length}}{end_colour} \
|
|
{node_domains_count: <{domains_count_length}} {node_cpu_count: <{cpu_count_length}} {node_load: <{load_length}} \
|
|
{node_mem_total: <{mem_total_length}} {node_mem_used: <{mem_used_length}} {node_mem_free: <{mem_free_length}} {node_mem_allocated: <{mem_alloc_length}}{end_bold}'.format(
|
|
node_name_length=node_name_length,
|
|
daemon_state_length=daemon_state_length,
|
|
coordinator_state_length=coordinator_state_length,
|
|
domain_state_length=domain_state_length,
|
|
domains_count_length=domains_count_length,
|
|
cpu_count_length=cpu_count_length,
|
|
load_length=load_length,
|
|
mem_total_length=mem_total_length,
|
|
mem_used_length=mem_used_length,
|
|
mem_free_length=mem_free_length,
|
|
mem_alloc_length=mem_alloc_length,
|
|
bold='',
|
|
end_bold='',
|
|
daemon_state_colour=daemon_state_colour,
|
|
coordinator_state_colour=coordinator_state_colour,
|
|
domain_state_colour=domain_state_colour,
|
|
end_colour=ansiprint.end(),
|
|
node_name=node_information['name'],
|
|
node_daemon_state=node_information['daemon_state'],
|
|
node_coordinator_state=node_information['coordinator_state'],
|
|
node_domain_state=node_information['domain_state'],
|
|
node_domains_count=node_information['domains_count'],
|
|
node_cpu_count=node_information['vcpu']['allocated'],
|
|
node_load=node_information['load'],
|
|
node_mem_total=node_information['memory']['total'],
|
|
node_mem_used=node_information['memory']['used'],
|
|
node_mem_free=node_information['memory']['free'],
|
|
node_mem_allocated=node_information['memory']['allocated']
|
|
)
|
|
)
|
|
|
|
click.echo('\n'.join(sorted(node_list_output)))
|