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pvc/node-daemon/pvcd/Daemon.py

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#!/usr/bin/env python3
# Daemon.py - Node daemon
# 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/>.
#
###############################################################################
# Version string for startup output
version = '0.4'
import kazoo.client
import libvirt
import sys
import os
import signal
import atexit
import socket
import psutil
import subprocess
import uuid
import time
import re
import configparser
import threading
import apscheduler.schedulers.background
import pvcd.log as log
import pvcd.zkhandler as zkhandler
import pvcd.fencing as fencing
import pvcd.common as common
import pvcd.DomainInstance as DomainInstance
import pvcd.NodeInstance as NodeInstance
import pvcd.VXNetworkInstance as VXNetworkInstance
import pvcd.DNSAggregatorInstance as DNSAggregatorInstance
###############################################################################
# PVCD - node daemon startup program
###############################################################################
#
# The PVC daemon starts a node and configures all the required components for
# the node to run. It determines which of the 3 daemon modes it should be in
# during initial setup based on hostname and the config file, and then starts
# any required services. The 3 daemon modes are:
# * leader: the cluster leader, follows the Zookeeper leader
# * coordinator: a Zookeeper cluster member
# * hypervisor: a hypervisor without any cluster intelligence
#
###############################################################################
###############################################################################
# Daemon functions
###############################################################################
# Create timer to update this node in Zookeeper
def startKeepaliveTimer():
global update_timer
interval = int(config['keepalive_interval'])
logger.out('Starting keepalive timer ({} second interval)'.format(interval), state='s')
update_timer.add_job(update_zookeeper, 'interval', seconds=interval)
update_timer.start()
def stopKeepaliveTimer():
global update_timer
try:
update_timer.shutdown()
logger.out('Stopping keepalive timer', state='s')
except:
pass
###############################################################################
# PHASE 1a - Configuration parsing
###############################################################################
# Get the config file variable from the environment
try:
pvcd_config_file = os.environ['PVCD_CONFIG_FILE']
except:
print('ERROR: The "PVCD_CONFIG_FILE" environment variable must be set before starting pvcd.')
exit(1)
# Set local hostname and domain variables
myfqdn = socket.gethostname()
#myfqdn = 'pvc-hv1.domain.net'
myhostname = myfqdn.split('.', 1)[0]
mydomainname = ''.join(myfqdn.split('.', 1)[1:])
mynodeid = re.findall(r'\d+', myhostname)[-1]
# Gather useful data about our host
# Static data format: 'cpu_count', 'arch', 'os', 'kernel'
staticdata = []
staticdata.append(str(psutil.cpu_count()))
staticdata.append(subprocess.run(['uname', '-r'], stdout=subprocess.PIPE).stdout.decode('ascii').strip())
staticdata.append(subprocess.run(['uname', '-o'], stdout=subprocess.PIPE).stdout.decode('ascii').strip())
staticdata.append(subprocess.run(['uname', '-m'], stdout=subprocess.PIPE).stdout.decode('ascii').strip())
# Create our timer object
update_timer = apscheduler.schedulers.background.BackgroundScheduler()
# Config values dictionary
config_values = [
'coordinators',
'dynamic_directory',
'log_directory',
'file_logging',
'keepalive_interval',
'fence_intervals',
'suicide_intervals',
'successful_fence',
'failed_fence',
'migration_target_selector',
'vni_dev',
'vni_dev_ip',
'vni_floating_ip',
'storage_dev',
'storage_dev_ip',
'upstream_dev',
'upstream_dev_ip',
'upstream_floating_ip',
'ipmi_hostname',
'ipmi_username',
'ipmi_password'
]
# Read and parse the config file
def readConfig(pvcd_config_file, myhostname):
print('Loading configuration from file "{}"'.format(pvcd_config_file))
o_config = configparser.ConfigParser()
o_config.read(pvcd_config_file)
config = {}
try:
entries = o_config[myhostname]
except:
try:
entries = o_config['default']
except Exception as e:
print('ERROR: Config file is not valid!')
exit(1)
for entry in config_values:
try:
config[entry] = entries[entry]
except:
try:
config[entry] = o_config['default'][entry]
except:
print('ERROR: Config file missing required value "{}" for this host!'.format(entry))
exit(1)
# Handle an empty ipmi_hostname
if config['ipmi_hostname'] == '':
config['ipmi_hostname'] = myshorthostname + '-lom.' + mydomainname
return config
# Get the config object from readConfig()
config = readConfig(pvcd_config_file, myhostname)
###############################################################################
# PHASE 1b - Prepare filesystem directories
###############################################################################
# Define our dynamic directory schema
# <dynamic_directory>/
# dnsmasq/
# pdns/
# nft/
config['dnsmasq_dynamic_directory'] = config['dynamic_directory'] + '/dnsmasq'
config['pdns_dynamic_directory'] = config['dynamic_directory'] + '/pdns'
config['nft_dynamic_directory'] = config['dynamic_directory'] + '/nft'
# Create our dynamic directories if they don't exist
if not os.path.exists(config['dynamic_directory']):
os.makedirs(config['dynamic_directory'])
os.makedirs(config['dnsmasq_dynamic_directory'])
os.makedirs(config['pdns_dynamic_directory'])
os.makedirs(config['nft_dynamic_directory'])
# Define our log directory schema
# <log_directory>/
# dnsmasq/
# pdns/
# nft/
config['dnsmasq_log_directory'] = config['log_directory'] + '/dnsmasq'
config['pdns_log_directory'] = config['log_directory'] + '/pdns'
config['nft_log_directory'] = config['log_directory'] + '/nft'
# Create our log directories if they don't exist
if not os.path.exists(config['log_directory']):
os.makedirs(config['log_directory'])
os.makedirs(config['dnsmasq_log_directory'])
os.makedirs(config['pdns_log_directory'])
os.makedirs(config['nft_log_directory'])
###############################################################################
# PHASE 1c - Set up logging
###############################################################################
logger = log.Logger(config)
# Print our startup messages
logger.out('Parallel Virtual Cluster node daemon v{}'.format(version))
logger.out('FQDN: {}'.format(myfqdn))
logger.out('Host: {}'.format(myhostname))
logger.out('ID: {}'.format(mynodeid))
logger.out('IPMI hostname: {}'.format(config['ipmi_hostname']))
logger.out('Machine details:')
logger.out(' CPUs: {}'.format(staticdata[0]))
logger.out(' Arch: {}'.format(staticdata[3]))
logger.out(' OS: {}'.format(staticdata[2]))
logger.out(' Kernel: {}'.format(staticdata[1]))
logger.out('Starting pvcd on host {}'.format(myfqdn), state='s')
###############################################################################
# PHASE 1d - Prepare sysctl for pvcd
###############################################################################
# Enable routing functions
common.run_os_command('sysctl net.ipv4.ip_forward=1')
common.run_os_command('sysctl net.ipv6.ip_forward=1')
# Send redirects
common.run_os_command('sysctl net.ipv4.conf.all.send_redirects=1')
common.run_os_command('sysctl net.ipv4.conf.default.send_redirects=1')
common.run_os_command('sysctl net.ipv6.conf.all.send_redirects=1')
common.run_os_command('sysctl net.ipv6.conf.default.send_redirects=1')
# Accept source routes
common.run_os_command('sysctl net.ipv4.conf.all.accept_source_route=1')
common.run_os_command('sysctl net.ipv4.conf.default.accept_source_route=1')
common.run_os_command('sysctl net.ipv6.conf.all.accept_source_route=1')
common.run_os_command('sysctl net.ipv6.conf.default.accept_source_route=1')
# Disable RP filtering on the VNI dev interface (to allow traffic pivoting from primary)
common.run_os_command('sysctl net.ipv4.conf.{}.rp_filter=0'.format(config['vni_dev']))
common.run_os_command('sysctl net.ipv6.conf.{}.rp_filter=0'.format(config['vni_dev']))
###############################################################################
# PHASE 2 - Determine coordinator mode and start Zookeeper on coordinators
###############################################################################
# What is the list of coordinator hosts
coordinator_hosts = config['coordinators'].split(',')
if myhostname in coordinator_hosts:
# We are indeed a coordinator host
config['daemon_mode'] = 'coordinator'
# Start the zookeeper service using systemctl
logger.out('Node is a ' + logger.fmt_blue + 'coordinator' + logger.fmt_end +'; starting Zookeeper daemon', state='i')
common.run_os_command('systemctl start zookeeper.service')
time.sleep(1)
else:
config['daemon_mode'] = 'hypervisor'
###############################################################################
# PHASE 3 - Attempt to connect to the coordinators and start zookeeper client
###############################################################################
# Start the connection to the coordinators
zk_conn = kazoo.client.KazooClient(hosts=config['coordinators'])
try:
logger.out('Connecting to Zookeeper cluster hosts {}'.format(config['coordinators']), state='i')
# Start connection
zk_conn.start()
except Exception as e:
logger.out('ERROR: Failed to connect to Zookeeper cluster: {}'.format(e), state='e')
exit(1)
# Handle zookeeper failures
def zk_listener(state):
global zk_conn, update_timer
if state == kazoo.client.KazooState.SUSPENDED:
logger.out('Connection to Zookeeper lost; retrying', state='w')
# Stop keepalive thread
if update_timer:
stopKeepaliveTimer()
while True:
_zk_conn = kazoo.client.KazooClient(hosts=config['coordinators'])
try:
_zk_conn.start()
zk_conn = _zk_conn
break
except:
time.sleep(1)
elif state == kazoo.client.KazooState.CONNECTED:
logger.out('Connection to Zookeeper restarted', state='o')
# Start keepalive thread
if update_timer:
update_timer = createKeepaliveTimer()
else:
pass
zk_conn.add_listener(zk_listener)
###############################################################################
# PHASE 4 - Gracefully handle termination
###############################################################################
# Cleanup function
def cleanup():
global zk_conn, update_timer
# Stop keepalive thread
stopKeepaliveTimer()
logger.out('Terminating pvcd and cleaning up', state='s')
# Force into secondary network state if needed
if zkhandler.readdata(zk_conn, '/nodes/{}/routerstate'.format(myhostname)) == 'primary':
is_primary = True
zkhandler.writedata(zk_conn, {
'/nodes/{}/routerstate'.format(myhostname): 'secondary',
'/primary_node': 'none'
})
else:
is_primary = False
# Wait for things to flush
if is_primary:
logger.out('Waiting for primary migration', state='s')
time.sleep(3)
# Set stop state in Zookeeper
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(myhostname): 'stop' })
# Forcibly terminate dnsmasq because it gets stuck sometimes
common.run_os_command('killall dnsmasq')
# Close the Zookeeper connection
try:
zk_conn.stop()
zk_conn.close()
except:
pass
logger.out('Terminated pvc daemon', state='s')
# Handle exit gracefully
atexit.register(cleanup)
# Termination function
def term(signum='', frame=''):
# Exit
sys.exit(0)
# Handle signals gracefully
signal.signal(signal.SIGTERM, term)
signal.signal(signal.SIGINT, term)
signal.signal(signal.SIGQUIT, term)
###############################################################################
# PHASE 5 - Prepare host in Zookeeper
###############################################################################
# Check if our node exists in Zookeeper, and create it if not
if zk_conn.exists('/nodes/{}'.format(myhostname)):
logger.out("Node is " + logger.fmt_green + "present" + logger.fmt_end + " in Zookeeper", state='i')
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(myhostname): 'init' })
# Update static data just in case it's changed
zkhandler.writedata(zk_conn, { '/nodes/{}/staticdata'.format(myhostname): ' '.join(staticdata) })
else:
logger.out("Node is " + logger.fmt_red + "absent" + logger.fmt_end + " in Zookeeper; adding new node", state='i')
keepalive_time = int(time.time())
transaction = zk_conn.transaction()
transaction.create('/nodes/{}'.format(myhostname), config['daemon_mode'].encode('ascii'))
# Basic state information
transaction.create('/nodes/{}/daemonmode'.format(myhostname), config['daemon_mode'].encode('ascii'))
transaction.create('/nodes/{}/daemonstate'.format(myhostname), 'init'.encode('ascii'))
transaction.create('/nodes/{}/routerstate'.format(myhostname), 'client'.encode('ascii'))
transaction.create('/nodes/{}/domainstate'.format(myhostname), 'flushed'.encode('ascii'))
transaction.create('/nodes/{}/staticdata'.format(myhostname), ' '.join(staticdata).encode('ascii'))
transaction.create('/nodes/{}/memfree'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/memused'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/memalloc'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/vcpualloc'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/cpuload'.format(myhostname), '0.0'.encode('ascii'))
transaction.create('/nodes/{}/networkscount'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/domainscount'.format(myhostname), '0'.encode('ascii'))
transaction.create('/nodes/{}/runningdomains'.format(myhostname), ''.encode('ascii'))
# Keepalives and fencing information
transaction.create('/nodes/{}/keepalive'.format(myhostname), str(keepalive_time).encode('ascii'))
transaction.create('/nodes/{}/ipmihostname'.format(myhostname), config['ipmi_hostname'].encode('ascii'))
transaction.create('/nodes/{}/ipmiusername'.format(myhostname), config['ipmi_username'].encode('ascii'))
transaction.create('/nodes/{}/ipmipassword'.format(myhostname), config['ipmi_password'].encode('ascii'))
transaction.commit()
# Check that the primary key exists, and create it with us as master if not
current_primary = zkhandler.readdata(zk_conn, '/primary_node')
if current_primary and current_primary != 'none':
logger.out('Current primary node is {}{}{}.'.format(logger.fmt_blue, current_primary, logger.fmt_end), state='i')
else:
if config['daemon_mode'] == 'coordinator':
logger.out('No primary node found; creating with us as primary.', state='i')
zkhandler.writedata(zk_conn, { '/primary_node': myhostname })
###############################################################################
# PHASE 6 - Create local IP addresses for static networks
###############################################################################
# VNI configuration
vni_dev = config['vni_dev']
vni_dev_ip = config['vni_dev_ip']
logger.out('Setting up VNI network on interface {} with IP {}'.format(vni_dev, vni_dev_ip), state='i')
common.run_os_command('ip link set {} up'.format(vni_dev))
common.run_os_command('ip address add {} dev {}'.format(vni_dev_ip, vni_dev))
# Storage configuration
storage_dev = config['storage_dev']
storage_dev_ip = config['storage_dev_ip']
logger.out('Setting up Storage network on interface {} with IP {}'.format(storage_dev, storage_dev_ip), state='i')
common.run_os_command('ip link set {} up'.format(storage_dev))
common.run_os_command('ip address add {} dev {}'.format(storage_dev_ip, storage_dev))
# Upstream configuration
if config['daemon_mode'] == 'coordinator':
upstream_dev = config['upstream_dev']
upstream_dev_ip = config['upstream_dev_ip']
logger.out('Setting up Upstream network on interface {} with IP {}'.format(upstream_dev, upstream_dev_ip), state='i')
common.run_os_command('ip link set {} up'.format(upstream_dev))
common.run_os_command('ip address add {} dev {}'.format(upstream_dev_ip, upstream_dev))
###############################################################################
# PHASE 7a - Ensure Libvirt is running on the local host
###############################################################################
# Start the zookeeper service using systemctl
logger.out('Starting Libvirt daemon', state='i')
common.run_os_command('systemctl start libvirtd.service')
time.sleep(1)
# Check that libvirtd is listening TCP
libvirt_check_name = "qemu+tcp://127.0.0.1:16509/system"
logger.out('Connecting to Libvirt daemon at {}'.format(libvirt_check_name), state='i')
try:
lv_conn = libvirt.open(libvirt_check_name)
lv_conn.close()
except Exception as e:
logger.out('ERROR: Failed to connect to Libvirt daemon: {}'.format(e), state='e')
exit(1)
###############################################################################
# PHASE 7b - Ensure Ceph is running on the local host
###############################################################################
# if coordinator, start ceph-mon
# if hypervisor or coodinator, start ceph-osds
###############################################################################
# PHASE 7c - Ensure NFT is running on the local host
###############################################################################
logger.out("Creating NFT firewall configuration", state='i')
# Create our config dirs
common.run_os_command(
'/bin/mkdir --parents {}/networks'.format(
config['nft_dynamic_directory']
)
)
common.run_os_command(
'/bin/mkdir --parents {}/static'.format(
config['nft_dynamic_directory']
)
)
common.run_os_command(
'/bin/mkdir --parents {}'.format(
config['nft_dynamic_directory']
)
)
# Set up the basic features of the nftables firewall
nftables_base_rules = """# Base rules
flush ruleset
# Add the filter table and chains
add table inet filter
add chain inet filter forward {{ type filter hook forward priority 0; }}
add chain inet filter input {{ type filter hook input priority 0; }}
# Include static rules and network rules
include "{rulesdir}/static/*"
include "{rulesdir}/networks/*"
""".format(
rulesdir=config['nft_dynamic_directory']
)
# Write the basic firewall config
nftables_base_filename = '{}/base.nft'.format(config['nft_dynamic_directory'])
with open(nftables_base_filename, 'w') as nfbasefile:
nfbasefile.write(nftables_base_rules)
common.reload_firewall_rules(logger, nftables_base_filename)
###############################################################################
# PHASE 7d - Ensure DNSMASQ is not running
###############################################################################
common.run_os_command('systemctl stop dnsmasq.service')
###############################################################################
# PHASE 8 - Set up our objects
###############################################################################
logger.out('Setting up objects', state='i')
d_node = dict()
d_network = dict()
d_domain = dict()
node_list = []
network_list = []
domain_list = []
# Create an instance of the DNS Aggregator if we're a coordinator
if config['daemon_mode'] == 'coordinator':
dns_aggregator = DNSAggregatorInstance.DNSAggregatorInstance(zk_conn, config, logger, d_network)
else:
dns_aggregator = None
# Node objects
@zk_conn.ChildrenWatch('/nodes')
def update_nodes(new_node_list):
global node_list, d_node
# Add any missing nodes to the list
for node in new_node_list:
if not node in node_list:
d_node[node] = NodeInstance.NodeInstance(node, myhostname, zk_conn, config, logger, d_node, d_network, d_domain, dns_aggregator)
# Remove any deleted nodes from the list
for node in node_list:
if not node in new_node_list:
# Delete the object
del(d_node[node])
# Update and print new list
node_list = new_node_list
logger.out('{}Node list:{} {}'.format(logger.fmt_blue, logger.fmt_end, ' '.join(node_list)), state='i')
# Update node objects' list
for node in d_node:
d_node[node].update_node_list(d_node)
# Alias for our local node (passed to network and domain objects)
this_node = d_node[myhostname]
# Primary node
@zk_conn.DataWatch('/primary_node')
def update_primart(new_primary, stat, event=''):
try:
new_primary = new_primary.decode('ascii')
except AttributeError:
new_primary = 'none'
if new_primary != this_node.primary_node:
if config['daemon_mode'] == 'coordinator':
# We're a coordinator and there is no primary
if new_primary == 'none':
if this_node.daemon_state == 'run' and this_node.router_state != 'primary':
logger.out('Contending for primary routing state', state='i')
zkhandler.writedata(zk_conn, {'/primary_node': myhostname})
elif new_primary == myhostname:
zkhandler.writedata(zk_conn, {'/nodes/{}/routerstate'.format(myhostname): 'primary'})
else:
zkhandler.writedata(zk_conn, {'/nodes/{}/routerstate'.format(myhostname): 'secondary'})
else:
zkhandler.writedata(zk_conn, {'/nodes/{}/routerstate'.format(myhostname): 'client'})
for node in d_node:
d_node[node].primary_node = new_primary
# Network objects
@zk_conn.ChildrenWatch('/networks')
def update_networks(new_network_list):
global network_list, d_network
# Add any missing networks to the list
for network in new_network_list:
if not network in network_list:
d_network[network] = VXNetworkInstance.VXNetworkInstance(network, zk_conn, config, logger, this_node)
# Start primary functionality
if this_node.router_state == 'primary':
dns_aggregator.add_client_network(network)
d_network[network].createGatewayAddress()
d_network[network].startDHCPServer()
# Remove any deleted networks from the list
for network in network_list:
if not network in new_network_list:
# Stop primary functionality
if this_node.router_state == 'primary':
d_network[network].stopDHCPServer()
d_network[network].removeGatewayAddress()
dns_aggregator.remove_client_network(network)
# Stop general functionality
d_network[network].removeFirewall()
d_network[network].removeNetwork()
# Delete the object
del(d_network[network])
# if config['daemon_mode'] == 'coordinator':
# # Update the DNS aggregator
# dns_aggregator.update_network_list(d_network)
# Update and print new list
network_list = new_network_list
logger.out('{}Network list:{} {}'.format(logger.fmt_blue, logger.fmt_end, ' '.join(network_list)), state='i')
# Update node objects' list
for node in d_node:
d_node[node].update_network_list(d_network)
# VM domain objects
@zk_conn.ChildrenWatch('/domains')
def update_domains(new_domain_list):
global domain_list, d_domain
# Add any missing domains to the list
for domain in new_domain_list:
if not domain in domain_list:
d_domain[domain] = DomainInstance.DomainInstance(domain, zk_conn, config, logger, this_node);
# Remove any deleted domains from the list
for domain in domain_list:
if not domain in new_domain_list:
# Delete the object
del(d_domain[domain])
# Update and print new list
domain_list = new_domain_list
logger.out('{}Domain list:{} {}'.format(logger.fmt_blue, logger.fmt_end, ' '.join(domain_list)), state='i')
# Update node objects' list
for node in d_node:
d_node[node].update_domain_list(d_domain)
###############################################################################
# PHASE 9 - Run the daemon
###############################################################################
# Zookeeper keepalive update function
def update_zookeeper():
# Get past state and update if needed
past_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(this_node.name))
if past_state != 'run':
this_node.daemon_state = 'run'
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(this_node.name): 'run' })
else:
this_node.daemon_state = 'run'
# Ensure the primary key is properly set
if this_node.router_state == 'primary':
if zkhandler.readdata(zk_conn, '/primary_node') != this_node.name:
zkhandler.writedata(zk_conn, {'/primary_node': this_node.name})
# Toggle state management of dead VMs to restart them
memalloc = 0
vcpualloc = 0
for domain, instance in this_node.d_domain.items():
if domain in this_node.domain_list:
# Add the allocated memory to our memalloc value
memalloc += instance.getmemory()
vcpualloc += instance.getvcpus()
if instance.getstate() == 'start' and instance.getnode() == this_node.name:
if instance.getdom() != None:
try:
if instance.getdom().state()[0] != libvirt.VIR_DOMAIN_RUNNING:
raise
except Exception as e:
# Toggle a state "change"
zkhandler.writedata(zk_conn, { '/domains/{}/state'.format(domain): instance.getstate() })
# Connect to libvirt
libvirt_name = "qemu:///system"
lv_conn = libvirt.open(libvirt_name)
if lv_conn == None:
logger.out('Failed to open connection to "{}"'.format(libvirt_name), state='e')
return
# Ensure that any running VMs are readded to the domain_list
running_domains = lv_conn.listAllDomains(libvirt.VIR_CONNECT_LIST_DOMAINS_ACTIVE)
for domain in running_domains:
domain_uuid = domain.UUIDString()
if domain_uuid not in this_node.domain_list:
this_node.domain_list.append(domain_uuid)
# Set ceph health information in zookeeper (primary only)
if this_node.router_state == 'primary':
retcode, stdout, stderr = common.run_os_command('ceph status')
ceph_status = stdout
try:
zkhandler.writedata(zk_conn, {
'/ceph': str(ceph_status)
})
except:
logger.out('Failed to set Ceph status data', state='e')
return
# Set our information in zookeeper
#this_node.name = lv_conn.getHostname()
this_node.memused = int(psutil.virtual_memory().used / 1024 / 1024)
this_node.memfree = int(psutil.virtual_memory().free / 1024 / 1024)
this_node.memalloc = memalloc
this_node.vcpualloc = vcpualloc
this_node.cpuload = os.getloadavg()[0]
this_node.domains_count = len(lv_conn.listDomainsID())
keepalive_time = int(time.time())
try:
zkhandler.writedata(zk_conn, {
'/nodes/{}/memused'.format(this_node.name): str(this_node.memused),
'/nodes/{}/memfree'.format(this_node.name): str(this_node.memfree),
'/nodes/{}/memalloc'.format(this_node.name): str(this_node.memalloc),
'/nodes/{}/vcpualloc'.format(this_node.name): str(this_node.vcpualloc),
'/nodes/{}/cpuload'.format(this_node.name): str(this_node.cpuload),
'/nodes/{}/networkscount'.format(this_node.name): str(this_node.networks_count),
'/nodes/{}/domainscount'.format(this_node.name): str(this_node.domains_count),
'/nodes/{}/runningdomains'.format(this_node.name): ' '.join(this_node.domain_list),
'/nodes/{}/keepalive'.format(this_node.name): str(keepalive_time)
})
except:
logger.out('Failed to set keepalive data', state='e')
return
# Close the Libvirt connection
lv_conn.close()
# Update our local node lists
flushed_node_list = []
active_node_list = []
inactive_node_list = []
for node_name in d_node:
try:
node_daemon_state = zkhandler.readdata(zk_conn, '/nodes/{}/daemonstate'.format(node_name))
node_domain_state = zkhandler.readdata(zk_conn, '/nodes/{}/domainstate'.format(node_name))
node_keepalive = int(zkhandler.readdata(zk_conn, '/nodes/{}/keepalive'.format(node_name)))
except:
node_daemon_state = 'unknown'
node_domain_state = 'unknown'
node_keepalive = 0
# Handle deadtime and fencng if needed
# (A node is considered dead when its keepalive timer is >6*keepalive_interval seconds
# out-of-date while in 'start' state)
node_deadtime = int(time.time()) - ( int(config['keepalive_interval']) * int(config['fence_intervals']) )
if node_keepalive < node_deadtime and node_daemon_state == 'run':
logger.out('Node {} seems dead - starting monitor for fencing'.format(node_name), state='w')
zkhandler.writedata(zk_conn, { '/nodes/{}/daemonstate'.format(node_name): 'dead' })
fence_thread = threading.Thread(target=fencing.fenceNode, args=(node_name, zk_conn, config, logger), kwargs={})
fence_thread.start()
# Display node information to the terminal
logger.out('{}{} keepalive{}'.format(logger.fmt_purple, this_node.name, logger.fmt_end), state='t')
logger.out(
'{bold}Domains:{nobold} {domcount} '
'{bold}Networks:{nobold} {netcount} '
'{bold}VM memory [MiB]:{nobold} {allocmem} '
'{bold}Free memory [MiB]:{nobold} {freemem} '
'{bold}Used memory [MiB]:{nobold} {usedmem} '
'{bold}Load:{nobold} {load}'.format(
bold=logger.fmt_bold,
nobold=logger.fmt_end,
domcount=this_node.domains_count,
freemem=this_node.memfree,
usedmem=this_node.memused,
load=this_node.cpuload,
allocmem=this_node.memalloc,
netcount=this_node.networks_count
),
)
# Start keepalive thread and immediately update Zookeeper
startKeepaliveTimer()
update_zookeeper()
# Tick loop; does nothing since everything else is async
while True:
try:
time.sleep(1)
except:
break
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