#!/usr/bin/env python3 # Daemon.py - Node daemon # Part of the Parallel Virtual Cluster (PVC) system # # Copyright (C) 2018-2021 Joshua M. Boniface # # 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, version 3. # # 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 . # ############################################################################### import kazoo.client import libvirt import os import signal import psutil import subprocess import time import re import yaml import json from socket import gethostname from threading import Thread from ipaddress import ip_address, ip_network from apscheduler.schedulers.background import BackgroundScheduler from distutils.util import strtobool from queue import Queue from xml.etree import ElementTree from rados import Rados from daemon_lib.zkhandler import ZKHandler, ZKSchema import pvcnoded.fencing as fencing import daemon_lib.log as log import daemon_lib.common as common import pvcnoded.VMInstance as VMInstance import pvcnoded.NodeInstance as NodeInstance import pvcnoded.VXNetworkInstance as VXNetworkInstance import pvcnoded.DNSAggregatorInstance as DNSAggregatorInstance import pvcnoded.CephInstance as CephInstance import pvcnoded.MetadataAPIInstance as MetadataAPIInstance # Version string for startup output version = '0.9.19' ############################################################################### # 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 ############################################################################### # Ensure the update_timer is None until it's set for real update_timer = None # Create timer to update this node in Zookeeper def startKeepaliveTimer(): # Create our timer object update_timer = BackgroundScheduler() interval = int(config['keepalive_interval']) logger.out('Starting keepalive timer ({} second interval)'.format(interval), state='s') update_timer.add_job(node_keepalive, 'interval', seconds=interval) update_timer.start() node_keepalive() return update_timer def stopKeepaliveTimer(): global update_timer try: update_timer.shutdown() logger.out('Stopping keepalive timer', state='s') except Exception: pass ############################################################################### # PHASE 1a - Configuration parsing ############################################################################### # Get the config file variable from the environment try: pvcnoded_config_file = os.environ['PVCD_CONFIG_FILE'] except Exception: print('ERROR: The "PVCD_CONFIG_FILE" environment variable must be set before starting pvcnoded.') exit(1) # Set local hostname and domain variables myfqdn = gethostname() myhostname = myfqdn.split('.', 1)[0] mydomainname = ''.join(myfqdn.split('.', 1)[1:]) try: mynodeid = re.findall(r'\d+', myhostname)[-1] except IndexError: mynodeid = 1 # Maintenance mode off by default maintenance = False # 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()) # Read and parse the config file def readConfig(pvcnoded_config_file, myhostname): print('Loading configuration from file "{}"'.format(pvcnoded_config_file)) with open(pvcnoded_config_file, 'r') as cfgfile: try: o_config = yaml.load(cfgfile, Loader=yaml.SafeLoader) except Exception as e: print('ERROR: Failed to parse configuration file: {}'.format(e)) exit(1) # Handle the basic config (hypervisor-only) try: config_general = { 'coordinators': o_config['pvc']['cluster']['coordinators'], 'enable_hypervisor': o_config['pvc']['functions']['enable_hypervisor'], 'enable_networking': o_config['pvc']['functions']['enable_networking'], 'enable_storage': o_config['pvc']['functions']['enable_storage'], 'enable_api': o_config['pvc']['functions']['enable_api'], 'dynamic_directory': o_config['pvc']['system']['configuration']['directories']['dynamic_directory'], 'log_directory': o_config['pvc']['system']['configuration']['directories']['log_directory'], 'console_log_directory': o_config['pvc']['system']['configuration']['directories']['console_log_directory'], 'file_logging': o_config['pvc']['system']['configuration']['logging']['file_logging'], 'stdout_logging': o_config['pvc']['system']['configuration']['logging']['stdout_logging'], 'log_colours': o_config['pvc']['system']['configuration']['logging']['log_colours'], 'log_dates': o_config['pvc']['system']['configuration']['logging']['log_dates'], 'log_keepalives': o_config['pvc']['system']['configuration']['logging']['log_keepalives'], 'log_keepalive_cluster_details': o_config['pvc']['system']['configuration']['logging']['log_keepalive_cluster_details'], 'log_keepalive_storage_details': o_config['pvc']['system']['configuration']['logging']['log_keepalive_storage_details'], 'console_log_lines': o_config['pvc']['system']['configuration']['logging']['console_log_lines'], 'vm_shutdown_timeout': int(o_config['pvc']['system']['intervals']['vm_shutdown_timeout']), 'keepalive_interval': int(o_config['pvc']['system']['intervals']['keepalive_interval']), 'fence_intervals': int(o_config['pvc']['system']['intervals']['fence_intervals']), 'suicide_intervals': int(o_config['pvc']['system']['intervals']['suicide_intervals']), 'successful_fence': o_config['pvc']['system']['fencing']['actions']['successful_fence'], 'failed_fence': o_config['pvc']['system']['fencing']['actions']['failed_fence'], 'migration_target_selector': o_config['pvc']['system']['migration']['target_selector'], 'ipmi_hostname': o_config['pvc']['system']['fencing']['ipmi']['host'], 'ipmi_username': o_config['pvc']['system']['fencing']['ipmi']['user'], 'ipmi_password': o_config['pvc']['system']['fencing']['ipmi']['pass'] } except Exception as e: print('ERROR: Failed to load configuration: {}'.format(e)) exit(1) config = config_general # Handle debugging config try: config_debug = { 'debug': o_config['pvc']['debug'] } except Exception: config_debug = { 'debug': False } config = {**config, **config_debug} # Handle the networking config if config['enable_networking']: try: config_networking = { 'cluster_domain': o_config['pvc']['cluster']['networks']['cluster']['domain'], 'vni_floating_ip': o_config['pvc']['cluster']['networks']['cluster']['floating_ip'], 'vni_network': o_config['pvc']['cluster']['networks']['cluster']['network'], 'storage_domain': o_config['pvc']['cluster']['networks']['storage']['domain'], 'storage_floating_ip': o_config['pvc']['cluster']['networks']['storage']['floating_ip'], 'storage_network': o_config['pvc']['cluster']['networks']['storage']['network'], 'upstream_domain': o_config['pvc']['cluster']['networks']['upstream']['domain'], 'upstream_floating_ip': o_config['pvc']['cluster']['networks']['upstream']['floating_ip'], 'upstream_network': o_config['pvc']['cluster']['networks']['upstream']['network'], 'upstream_gateway': o_config['pvc']['cluster']['networks']['upstream']['gateway'], 'pdns_postgresql_host': o_config['pvc']['coordinator']['dns']['database']['host'], 'pdns_postgresql_port': o_config['pvc']['coordinator']['dns']['database']['port'], 'pdns_postgresql_dbname': o_config['pvc']['coordinator']['dns']['database']['name'], 'pdns_postgresql_user': o_config['pvc']['coordinator']['dns']['database']['user'], 'pdns_postgresql_password': o_config['pvc']['coordinator']['dns']['database']['pass'], 'metadata_postgresql_host': o_config['pvc']['coordinator']['metadata']['database']['host'], 'metadata_postgresql_port': o_config['pvc']['coordinator']['metadata']['database']['port'], 'metadata_postgresql_dbname': o_config['pvc']['coordinator']['metadata']['database']['name'], 'metadata_postgresql_user': o_config['pvc']['coordinator']['metadata']['database']['user'], 'metadata_postgresql_password': o_config['pvc']['coordinator']['metadata']['database']['pass'], 'bridge_dev': o_config['pvc']['system']['configuration']['networking']['bridge_device'], 'vni_dev': o_config['pvc']['system']['configuration']['networking']['cluster']['device'], 'vni_mtu': o_config['pvc']['system']['configuration']['networking']['cluster']['mtu'], 'vni_dev_ip': o_config['pvc']['system']['configuration']['networking']['cluster']['address'], 'storage_dev': o_config['pvc']['system']['configuration']['networking']['storage']['device'], 'storage_mtu': o_config['pvc']['system']['configuration']['networking']['storage']['mtu'], 'storage_dev_ip': o_config['pvc']['system']['configuration']['networking']['storage']['address'], 'upstream_dev': o_config['pvc']['system']['configuration']['networking']['upstream']['device'], 'upstream_mtu': o_config['pvc']['system']['configuration']['networking']['upstream']['mtu'], 'upstream_dev_ip': o_config['pvc']['system']['configuration']['networking']['upstream']['address'], } except Exception as e: print('ERROR: Failed to load configuration: {}'.format(e)) exit(1) config = {**config, **config_networking} # Create the by-id address entries for net in ['vni', 'storage', 'upstream']: address_key = '{}_dev_ip'.format(net) floating_key = '{}_floating_ip'.format(net) network_key = '{}_network'.format(net) # Verify the network provided is valid try: network = ip_network(config[network_key]) except Exception: print('ERROR: Network address {} for {} is not valid!'.format(config[network_key], network_key)) exit(1) # If we should be autoselected if config[address_key] == 'by-id': # Construct an IP from the relevant network # The NodeID starts at 1, but indexes start at 0 address_id = int(mynodeid) - 1 # Grab the nth address from the network config[address_key] = '{}/{}'.format(list(network.hosts())[address_id], network.prefixlen) # Verify that the floating IP is valid try: # Set the ipaddr floating_addr = ip_address(config[floating_key].split('/')[0]) # Verify we're in the network if floating_addr not in list(network.hosts()): raise except Exception: print('ERROR: Floating address {} for {} is not valid!'.format(config[floating_key], floating_key)) exit(1) # Handle the storage config if config['enable_storage']: try: config_storage = { 'ceph_config_file': o_config['pvc']['system']['configuration']['storage']['ceph_config_file'], 'ceph_admin_keyring': o_config['pvc']['system']['configuration']['storage']['ceph_admin_keyring'] } except Exception as e: print('ERROR: Failed to load configuration: {}'.format(e)) exit(1) config = {**config, **config_storage} # Handle an empty ipmi_hostname if config['ipmi_hostname'] == '': config['ipmi_hostname'] = myhostname + '-lom.' + mydomainname return config # Get the config object from readConfig() config = readConfig(pvcnoded_config_file, myhostname) debug = config['debug'] if debug: print('DEBUG MODE ENABLED') # Handle the enable values enable_hypervisor = config['enable_hypervisor'] enable_networking = config['enable_networking'] enable_storage = config['enable_storage'] ############################################################################### # PHASE 1b - Prepare filesystem directories ############################################################################### # Define our dynamic directory schema # / # 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 # / # 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('') logger.out('|--------------------------------------------------|') logger.out('| ######## ## ## ###### |') logger.out('| ## ## ## ## ## ## |') logger.out('| ## ## ## ## ## |') logger.out('| ######## ## ## ## |') logger.out('| ## ## ## ## |') logger.out('| ## ## ## ## ## |') logger.out('| ## ### ###### |') logger.out('|--------------------------------------------------|') logger.out('| Parallel Virtual Cluster node daemon v{0: <10} |'.format(version)) logger.out('| FQDN: {0: <42} |'.format(myfqdn)) logger.out('| Host: {0: <42} |'.format(myhostname)) logger.out('| ID: {0: <44} |'.format(mynodeid)) logger.out('| IPMI hostname: {0: <33} |'.format(config['ipmi_hostname'])) logger.out('| Machine details: |') logger.out('| CPUs: {0: <40} |'.format(staticdata[0])) logger.out('| Arch: {0: <40} |'.format(staticdata[3])) logger.out('| OS: {0: <42} |'.format(staticdata[2])) logger.out('| Kernel: {0: <38} |'.format(staticdata[1])) logger.out('|--------------------------------------------------|') logger.out('') logger.out('Starting pvcnoded on host {}'.format(myfqdn), state='s') # Define some colours for future messages if applicable if config['log_colours']: fmt_end = logger.fmt_end fmt_bold = logger.fmt_bold fmt_blue = logger.fmt_blue fmt_cyan = logger.fmt_cyan fmt_green = logger.fmt_green fmt_yellow = logger.fmt_yellow fmt_red = logger.fmt_red fmt_purple = logger.fmt_purple else: fmt_end = '' fmt_bold = '' fmt_blue = '' fmt_cyan = '' fmt_green = '' fmt_yellow = '' fmt_red = '' fmt_purple = '' ############################################################################### # PHASE 2a - Create local IP addresses for static networks ############################################################################### if enable_networking: # VNI configuration vni_dev = config['vni_dev'] vni_mtu = config['vni_mtu'] vni_dev_ip = config['vni_dev_ip'] logger.out('Setting up VNI network interface {} with MTU {}'.format(vni_dev, vni_mtu), state='i') common.run_os_command('ip link set {} mtu {} up'.format(vni_dev, vni_mtu)) # Cluster bridge configuration logger.out('Setting up Cluster network bridge on interface {} with IP {}'.format(vni_dev, vni_dev_ip), state='i') common.run_os_command('brctl addbr brcluster') common.run_os_command('brctl addif brcluster {}'.format(vni_dev)) common.run_os_command('ip link set brcluster mtu {} up'.format(vni_mtu)) common.run_os_command('ip address add {} dev {}'.format(vni_dev_ip, 'brcluster')) # Storage configuration storage_dev = config['storage_dev'] storage_mtu = config['storage_mtu'] storage_dev_ip = config['storage_dev_ip'] logger.out('Setting up Storage network interface {} with MTU {}'.format(storage_dev, vni_mtu), state='i') common.run_os_command('ip link set {} mtu {} up'.format(storage_dev, storage_mtu)) # Storage bridge configuration if storage_dev == vni_dev: logger.out('Adding Storage network IP {} to VNI Cluster bridge brcluster'.format(storage_dev_ip), state='i') common.run_os_command('ip address add {} dev {}'.format(storage_dev_ip, 'brcluster')) else: logger.out('Setting up Storage network bridge on interface {} with IP {}'.format(vni_dev, vni_dev_ip), state='i') common.run_os_command('brctl addbr brstorage') common.run_os_command('brctl addif brstorage {}'.format(storage_dev)) common.run_os_command('ip link set brstorage mtu {} up'.format(storage_mtu)) common.run_os_command('ip address add {} dev {}'.format(storage_dev_ip, 'brstorage')) # Upstream configuration upstream_dev = config['upstream_dev'] upstream_mtu = config['upstream_mtu'] upstream_dev_ip = config['upstream_dev_ip'] logger.out('Setting up Upstream network interface {} with MTU {}'.format(upstream_dev, upstream_mtu), state='i') common.run_os_command('ip link set {} mtu {} up'.format(upstream_dev, upstream_mtu)) # Upstream bridge configuration if upstream_dev == vni_dev: logger.out('Adding Upstream network IP {} to VNI Cluster bridge brcluster'.format(upstream_dev_ip), state='i') common.run_os_command('ip address add {} dev {}'.format(upstream_dev_ip, 'brcluster')) else: logger.out('Setting up Upstream network bridge on interface {} with IP {}'.format(vni_dev, vni_dev_ip), state='i') common.run_os_command('brctl addbr brupstream') common.run_os_command('brctl addif brupstream {}'.format(upstream_dev)) common.run_os_command('ip link set brupstream mtu {} up'.format(upstream_mtu)) common.run_os_command('ip address add {} dev {}'.format(upstream_dev_ip, 'brupstream')) # Add upstream default gateway upstream_gateway = config.get('upstream_gateway', None) if upstream_gateway: logger.out('Setting up Upstream default gateway IP {}'.format(upstream_gateway), state='i') if upstream_dev == vni_dev: common.run_os_command('ip route add default via {} dev {}'.format(upstream_gateway, 'brcluster')) else: common.run_os_command('ip route add default via {} dev {}'.format(upstream_gateway, 'brupstream')) ############################################################################### # PHASE 2b - Prepare sysctl for pvcnoded ############################################################################### if enable_networking: # 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 Cluster and Upstream interfaces (to allow traffic pivoting) common.run_os_command('sysctl net.ipv4.conf.{}.rp_filter=0'.format(config['vni_dev'])) common.run_os_command('sysctl net.ipv4.conf.{}.rp_filter=0'.format(config['upstream_dev'])) common.run_os_command('sysctl net.ipv4.conf.brcluster.rp_filter=0') common.run_os_command('sysctl net.ipv4.conf.brupstream.rp_filter=0') common.run_os_command('sysctl net.ipv6.conf.{}.rp_filter=0'.format(config['vni_dev'])) common.run_os_command('sysctl net.ipv6.conf.{}.rp_filter=0'.format(config['upstream_dev'])) common.run_os_command('sysctl net.ipv6.conf.brcluster.rp_filter=0') common.run_os_command('sysctl net.ipv6.conf.brupstream.rp_filter=0') ############################################################################### # PHASE 3a - Determine coordinator mode ############################################################################### # What is the list of coordinator hosts coordinator_nodes = config['coordinators'] if myhostname in coordinator_nodes: # We are indeed a coordinator host config['daemon_mode'] = 'coordinator' # Start the zookeeper service using systemctl logger.out('Node is a ' + fmt_blue + 'coordinator' + fmt_end, state='i') else: config['daemon_mode'] = 'hypervisor' ############################################################################### # PHASE 3b - Start system daemons ############################################################################### if config['daemon_mode'] == 'coordinator': logger.out('Starting Zookeeper daemon', state='i') common.run_os_command('systemctl start zookeeper.service') if enable_hypervisor: logger.out('Starting Libvirt daemon', state='i') common.run_os_command('systemctl start libvirtd.service') if enable_networking: if config['daemon_mode'] == 'coordinator': logger.out('Starting Patroni daemon', state='i') common.run_os_command('systemctl start patroni.service') logger.out('Starting FRRouting daemon', state='i') common.run_os_command('systemctl start frr.service') if enable_storage: if config['daemon_mode'] == 'coordinator': logger.out('Starting Ceph monitor daemon', state='i') common.run_os_command('systemctl start ceph-mon@{}'.format(myhostname)) logger.out('Starting Ceph manager daemon', state='i') common.run_os_command('systemctl start ceph-mgr@{}'.format(myhostname)) logger.out('Waiting 5s for daemons to start', state='s') time.sleep(5) ############################################################################### # PHASE 4 - Attempt to connect to the coordinators and start zookeeper client ############################################################################### # Create an instance of the handler zkhandler = ZKHandler(config, logger=logger) try: logger.out('Connecting to Zookeeper cluster nodes {}'.format(config['coordinators']), state='i') # Start connection zkhandler.connect(persistent=True) except Exception as e: logger.out('ERROR: Failed to connect to Zookeeper cluster: {}'.format(e), state='e') exit(1) logger.out('Validating Zookeeper schema', state='i') # Instantiate a zkschema instance with our current schema version zkschema = ZKSchema() try: node_schema_version = int(zkhandler.read(zkschema.path('node.data.active_schema', myhostname))) except Exception: node_schema_version = zkhandler.read(zkschema.path('base.schema.version')) zkhandler.write([ (zkschema.path('node.data.active_schema', myhostname), node_schema_version) ]) # Load in the current node schema version zkschema.load(node_schema_version) # Record the latest intalled schema version latest_schema_version = ZKSchema.find_latest() zkhandler.write([ (zkschema.path('node.data.latest_schema', myhostname), latest_schema_version) ]) # Validate our schema against that version if not zkschema.validate(zkhandler, logger): logger.out('Found schema violations, applying', state='i') zkschema.apply(zkhandler) else: logger.out('Schema successfully validated', state='o') # Watch for a global schema update and fire # This will only change by the API when triggered after seeing all nodes can update @zkhandler.zk_conn.DataWatch(zkschema.path('base.schema.version')) def update_schema(new_schema_version, stat, event=''): global zkschema, zkhandler, update_timer, node_schema_version new_schema_version = int(new_schema_version.decode('ascii')) if new_schema_version == node_schema_version: return logger.out('Hot update of schema version started', state='s') # Prevent any keepalive updates while this happens if update_timer is not None: stopKeepaliveTimer() time.sleep(1) # Perform the migration (primary only) if zkhandler.read(zkschema.path('base.config.primary_node')) == myhostname: logger.out('Primary node acquiring exclusive lock', state='s') # Wait for things to settle time.sleep(0.5) # Acquire a write lock on the root key with zkhandler.exclusivelock('/'): # Perform the schema migration tasks logger.out('Performing schema update', state='s') if new_schema_version > node_schema_version: zkschema.migrate(zkhandler, new_schema_version) if new_schema_version < node_schema_version: zkschema.rollback(zkhandler, new_schema_version) # Wait for the exclusive lock to be lifted else: logger.out('Non-primary node acquiring read lock', state='s') # Wait for things to settle time.sleep(1) # Wait for a read lock lock = zkhandler.readlock('/') lock.acquire() # Wait a bit more for the primary to return to normal time.sleep(1) # Update the local schema version logger.out('Updating local schema', state='s') zkschema.load(new_schema_version) zkhandler.write([ (zkschema.path('node.data.active_schema', myhostname), new_schema_version) ]) node_schema_version = new_schema_version time.sleep(1) # Restart the update timer if update_timer is not None: update_timer = startKeepaliveTimer() # Restart the API daemons if applicable if zkhandler.read(zkschema.path('base.config.primary_node')) == myhostname: common.run_os_command('systemctl start pvcapid.service') common.run_os_command('systemctl start pvcapid-worker.service') # If we are the last node to get a schema update, fire the master update if latest_schema_version > node_schema_version: node_latest_schema_version = list() for node in zkhandler.children(zkschema.path('base.node')): node_latest_schema_version.append(int(zkhandler.read(zkschema.path('node.data.latest_schema', node)))) # This is true if all elements of the latest schema version are identical to the latest version, # i.e. they have all had the latest schema installed and ready to load. if node_latest_schema_version.count(latest_schema_version) == len(node_latest_schema_version): zkhandler.write([ (zkschema.path('base.schema.version'), latest_schema_version) ]) ############################################################################### # PHASE 5 - Gracefully handle termination ############################################################################### # Cleanup function def cleanup(): global zkhandler, zkschema, update_timer, d_domain logger.out('Terminating pvcnoded and cleaning up', state='s') # Set shutdown state in Zookeeper zkhandler.write([ ('/nodes/{}/daemonstate'.format(myhostname), 'shutdown') ]) # Waiting for any flushes to complete logger.out('Waiting for any active flushes', state='s') while this_node.flush_thread is not None: time.sleep(0.5) # Stop console logging on all VMs logger.out('Stopping domain console watchers', state='s') for domain in d_domain: if d_domain[domain].getnode() == myhostname: try: d_domain[domain].console_log_instance.stop() except NameError: pass except AttributeError: pass # Force into secondary coordinator state if needed try: if this_node.router_state == 'primary': zkhandler.write([ ('/config/primary_node', 'none') ]) logger.out('Waiting for primary migration', state='s') while this_node.router_state != 'secondary': time.sleep(0.5) except Exception: pass # Stop keepalive thread try: stopKeepaliveTimer() except NameError: pass except AttributeError: pass logger.out('Performing final keepalive update', state='s') node_keepalive() # Set stop state in Zookeeper zkhandler.write([ ('/nodes/{}/daemonstate'.format(myhostname), 'stop') ]) # Forcibly terminate dnsmasq because it gets stuck sometimes common.run_os_command('killall dnsmasq') # Close the Zookeeper connection try: del zkschema zkhandler.disconnect() del zkhandler except Exception: pass logger.out('Terminated pvc daemon', state='s') os._exit(0) # Termination function def term(signum='', frame=''): cleanup() # Hangup (logrotate) function def hup(signum='', frame=''): if config['file_logging']: logger.hup() # Handle signals gracefully signal.signal(signal.SIGTERM, term) signal.signal(signal.SIGINT, term) signal.signal(signal.SIGQUIT, term) signal.signal(signal.SIGHUP, hup) ############################################################################### # PHASE 6 - Prepare host in Zookeeper ############################################################################### # Check if our node exists in Zookeeper, and create it if not if config['daemon_mode'] == 'coordinator': init_routerstate = 'secondary' else: init_routerstate = 'client' if zkhandler.exists('/nodes/{}'.format(myhostname)): logger.out("Node is " + fmt_green + "present" + fmt_end + " in Zookeeper", state='i') # Update static data just in case it's changed zkhandler.write([ ('/nodes/{}/daemonmode'.format(myhostname), config['daemon_mode']), ('/nodes/{}/daemonstate'.format(myhostname), 'init'), ('/nodes/{}/routerstate'.format(myhostname), init_routerstate), ('/nodes/{}/staticdata'.format(myhostname), ' '.join(staticdata)), # Keepalives and fencing information (always load and set from config on boot) ('/nodes/{}/ipmihostname'.format(myhostname), config['ipmi_hostname']), ('/nodes/{}/ipmiusername'.format(myhostname), config['ipmi_username']), ('/nodes/{}/ipmipassword'.format(myhostname), config['ipmi_password']) ]) else: logger.out("Node is " + fmt_red + "absent" + fmt_end + " in Zookeeper; adding new node", state='i') keepalive_time = int(time.time()) zkhandler.write([ ('/nodes/{}'.format(myhostname), config['daemon_mode']), # Basic state information ('/nodes/{}/daemonmode'.format(myhostname), config['daemon_mode']), ('/nodes/{}/daemonstate'.format(myhostname), 'init'), ('/nodes/{}/routerstate'.format(myhostname), init_routerstate), ('/nodes/{}/domainstate'.format(myhostname), 'flushed'), ('/nodes/{}/staticdata'.format(myhostname), ' '.join(staticdata)), ('/nodes/{}/memtotal'.format(myhostname), '0'), ('/nodes/{}/memfree'.format(myhostname), '0'), ('/nodes/{}/memused'.format(myhostname), '0'), ('/nodes/{}/memalloc'.format(myhostname), '0'), ('/nodes/{}/memprov'.format(myhostname), '0'), ('/nodes/{}/vcpualloc'.format(myhostname), '0'), ('/nodes/{}/cpuload'.format(myhostname), '0.0'), ('/nodes/{}/networkscount'.format(myhostname), '0'), ('/nodes/{}/domainscount'.format(myhostname), '0'), ('/nodes/{}/runningdomains'.format(myhostname), ''), # Keepalives and fencing information ('/nodes/{}/keepalive'.format(myhostname), str(keepalive_time)), ('/nodes/{}/ipmihostname'.format(myhostname), config['ipmi_hostname']), ('/nodes/{}/ipmiusername'.format(myhostname), config['ipmi_username']), ('/nodes/{}/ipmipassword'.format(myhostname), config['ipmi_password']) ]) # Check that the primary key exists, and create it with us as master if not try: current_primary = zkhandler.read('/config/primary_node') except kazoo.exceptions.NoNodeError: current_primary = 'none' if current_primary and current_primary != 'none': logger.out('Current primary node is {}{}{}.'.format(fmt_blue, current_primary, fmt_end), state='i') else: if config['daemon_mode'] == 'coordinator': logger.out('No primary node found; creating with us as primary.', state='i') zkhandler.write([ ('/config/primary_node', myhostname) ]) ############################################################################### # PHASE 7a - Ensure IPMI is reachable and working ############################################################################### if not fencing.verifyIPMI(config['ipmi_hostname'], config['ipmi_username'], config['ipmi_password']): logger.out('Our IPMI is not reachable; fencing of this node will likely fail', state='w') ############################################################################### # PHASE 7b - Ensure Libvirt is working ############################################################################### if enable_hypervisor: # Check that libvirtd is listening TCP libvirt_check_name = "qemu+tcp://{}:16509/system".format(myhostname) 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 7c - Ensure NFT is running on the local host ############################################################################### if enable_networking: 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(nftables_base_filename, logger=logger) ############################################################################### # 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() d_osd = dict() d_pool = dict() d_volume = dict() # Dict of Dicts node_list = [] network_list = [] domain_list = [] osd_list = [] pool_list = [] volume_list = dict() # Dict of Lists if enable_networking: # Create an instance of the DNS Aggregator and Metadata API if we're a coordinator if config['daemon_mode'] == 'coordinator': dns_aggregator = DNSAggregatorInstance.DNSAggregatorInstance(config, logger) metadata_api = MetadataAPIInstance.MetadataAPIInstance(zkhandler, config, logger) else: dns_aggregator = None metadata_api = None else: dns_aggregator = None metadata_api = None # Node objects @zkhandler.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 node not in node_list: d_node[node] = NodeInstance.NodeInstance(node, myhostname, zkhandler, config, logger, d_node, d_network, d_domain, dns_aggregator, metadata_api) # Remove any deleted nodes from the list for node in node_list: if node not 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(fmt_blue, 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] # Maintenance mode @zkhandler.zk_conn.DataWatch('/config/maintenance') def set_maintenance(_maintenance, stat, event=''): global maintenance try: maintenance = bool(strtobool(_maintenance.decode('ascii'))) except Exception: maintenance = False # Primary node @zkhandler.zk_conn.DataWatch('/config/primary_node') def update_primary(new_primary, stat, event=''): try: new_primary = new_primary.decode('ascii') except AttributeError: new_primary = 'none' key_version = stat.version 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 not in ['primary', 'takeover', 'relinquish']: logger.out('Contending for primary coordinator state', state='i') # Acquire an exclusive lock on the primary_node key primary_lock = zkhandler.exclusivelock('/config/primary_node') try: # This lock times out after 0.4s, which is 0.1s less than the pre-takeover # timeout below, thus ensuring that a primary takeover will not deadlock # against a node that failed the contention primary_lock.acquire(timeout=0.4) # Ensure when we get the lock that the versions are still consistent and that # another node hasn't already acquired primary state if key_version == zkhandler.zk_conn.get('/config/primary_node')[1].version: zkhandler.write([ ('/config/primary_node', myhostname) ]) # Cleanly release the lock primary_lock.release() # We timed out acquiring a lock, which means we failed contention, so just pass except Exception: pass elif new_primary == myhostname: if this_node.router_state == 'secondary': time.sleep(0.5) zkhandler.write([ ('/nodes/{}/routerstate'.format(myhostname), 'takeover') ]) else: if this_node.router_state == 'primary': time.sleep(0.5) zkhandler.write([ ('/nodes/{}/routerstate'.format(myhostname), 'relinquish') ]) else: zkhandler.write([ ('/nodes/{}/routerstate'.format(myhostname), 'client') ]) for node in d_node: d_node[node].primary_node = new_primary if enable_networking: # Network objects @zkhandler.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 network not in network_list: d_network[network] = VXNetworkInstance.VXNetworkInstance(network, zkhandler, config, logger, this_node, dns_aggregator) if config['daemon_mode'] == 'coordinator' and d_network[network].nettype == 'managed': try: dns_aggregator.add_network(d_network[network]) except Exception as e: logger.out('Failed to create DNS Aggregator for network {}: {}'.format(network, e), 'w') # Start primary functionality if this_node.router_state == 'primary' and d_network[network].nettype == 'managed': d_network[network].createGateways() d_network[network].startDHCPServer() # Remove any deleted networks from the list for network in network_list: if network not in new_network_list: if d_network[network].nettype == 'managed': # Stop primary functionality if this_node.router_state == 'primary': d_network[network].stopDHCPServer() d_network[network].removeGateways() dns_aggregator.remove_network(d_network[network]) # Stop general functionality d_network[network].removeFirewall() d_network[network].removeNetwork() # Delete the object del(d_network[network]) # Update and print new list network_list = new_network_list logger.out('{}Network list:{} {}'.format(fmt_blue, fmt_end, ' '.join(network_list)), state='i') # Update node objects' list for node in d_node: d_node[node].update_network_list(d_network) if enable_hypervisor: # VM command pipeline key @zkhandler.zk_conn.DataWatch('/cmd/domains') def cmd_domains(data, stat, event=''): if data: VMInstance.run_command(zkhandler, logger, this_node, data.decode('ascii')) # VM domain objects @zkhandler.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 domain not in domain_list: d_domain[domain] = VMInstance.VMInstance(domain, zkhandler, config, logger, this_node) # Remove any deleted domains from the list for domain in domain_list: if domain not in new_domain_list: # Delete the object del(d_domain[domain]) # Update and print new list domain_list = new_domain_list logger.out('{}VM list:{} {}'.format(fmt_blue, fmt_end, ' '.join(domain_list)), state='i') # Update node objects' list for node in d_node: d_node[node].update_domain_list(d_domain) if enable_storage: # Ceph command pipeline key @zkhandler.zk_conn.DataWatch('/cmd/ceph') def cmd_ceph(data, stat, event=''): if data: CephInstance.run_command(zkhandler, logger, this_node, data.decode('ascii'), d_osd) # OSD objects @zkhandler.zk_conn.ChildrenWatch('/ceph/osds') def update_osds(new_osd_list): global osd_list, d_osd # Add any missing OSDs to the list for osd in new_osd_list: if osd not in osd_list: d_osd[osd] = CephInstance.CephOSDInstance(zkhandler, this_node, osd) # Remove any deleted OSDs from the list for osd in osd_list: if osd not in new_osd_list: # Delete the object del(d_osd[osd]) # Update and print new list osd_list = new_osd_list logger.out('{}OSD list:{} {}'.format(fmt_blue, fmt_end, ' '.join(osd_list)), state='i') # Pool objects @zkhandler.zk_conn.ChildrenWatch('/ceph/pools') def update_pools(new_pool_list): global pool_list, d_pool # Add any missing Pools to the list for pool in new_pool_list: if pool not in pool_list: d_pool[pool] = CephInstance.CephPoolInstance(zkhandler, this_node, pool) d_volume[pool] = dict() volume_list[pool] = [] # Remove any deleted Pools from the list for pool in pool_list: if pool not in new_pool_list: # Delete the object del(d_pool[pool]) # Update and print new list pool_list = new_pool_list logger.out('{}Pool list:{} {}'.format(fmt_blue, fmt_end, ' '.join(pool_list)), state='i') # Volume objects in each pool for pool in pool_list: @zkhandler.zk_conn.ChildrenWatch('/ceph/volumes/{}'.format(pool)) def update_volumes(new_volume_list): global volume_list, d_volume # Add any missing Volumes to the list for volume in new_volume_list: if volume not in volume_list[pool]: d_volume[pool][volume] = CephInstance.CephVolumeInstance(zkhandler, this_node, pool, volume) # Remove any deleted Volumes from the list for volume in volume_list[pool]: if volume not in new_volume_list: # Delete the object del(d_volume[pool][volume]) # Update and print new list volume_list[pool] = new_volume_list logger.out('{}Volume list [{pool}]:{} {plist}'.format(fmt_blue, fmt_end, pool=pool, plist=' '.join(volume_list[pool])), state='i') ############################################################################### # PHASE 9 - Run the daemon ############################################################################### # Ceph stats update function def collect_ceph_stats(queue): if debug: logger.out("Thread starting", state='d', prefix='ceph-thread') # Connect to the Ceph cluster try: ceph_conn = Rados(conffile=config['ceph_config_file'], conf=dict(keyring=config['ceph_admin_keyring'])) if debug: logger.out("Connecting to cluster", state='d', prefix='ceph-thread') ceph_conn.connect(timeout=1) except Exception as e: logger.out('Failed to open connection to Ceph cluster: {}'.format(e), state='e') return if debug: logger.out("Getting health stats from monitor", state='d', prefix='ceph-thread') # Get Ceph cluster health for local status output command = {"prefix": "health", "format": "json"} try: health_status = json.loads(ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1]) ceph_health = health_status['status'] except Exception as e: logger.out('Failed to obtain Ceph health data: {}'.format(e), state='e') return if ceph_health == 'HEALTH_OK': ceph_health_colour = fmt_green elif ceph_health == 'HEALTH_WARN': ceph_health_colour = fmt_yellow else: ceph_health_colour = fmt_red # Primary-only functions if this_node.router_state == 'primary': if debug: logger.out("Set ceph health information in zookeeper (primary only)", state='d', prefix='ceph-thread') command = {"prefix": "status", "format": "pretty"} ceph_status = ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1].decode('ascii') try: zkhandler.write([ ('/ceph', str(ceph_status)) ]) except Exception as e: logger.out('Failed to set Ceph status data: {}'.format(e), state='e') return if debug: logger.out("Set ceph rados df information in zookeeper (primary only)", state='d', prefix='ceph-thread') # Get rados df info command = {"prefix": "df", "format": "pretty"} ceph_df = ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1].decode('ascii') try: zkhandler.write([ ('/ceph/util', str(ceph_df)) ]) except Exception as e: logger.out('Failed to set Ceph utilization data: {}'.format(e), state='e') return if debug: logger.out("Set pool information in zookeeper (primary only)", state='d', prefix='ceph-thread') # Get pool info retcode, stdout, stderr = common.run_os_command('ceph df --format json', timeout=1) try: ceph_pool_df_raw = json.loads(stdout)['pools'] except Exception as e: logger.out('Failed to obtain Pool data (ceph df): {}'.format(e), state='w') ceph_pool_df_raw = [] retcode, stdout, stderr = common.run_os_command('rados df --format json', timeout=1) try: rados_pool_df_raw = json.loads(stdout)['pools'] except Exception as e: logger.out('Failed to obtain Pool data (rados df): {}'.format(e), state='w') rados_pool_df_raw = [] pool_count = len(ceph_pool_df_raw) if debug: logger.out("Getting info for {} pools".format(pool_count), state='d', prefix='ceph-thread') for pool_idx in range(0, pool_count): try: # Combine all the data for this pool ceph_pool_df = ceph_pool_df_raw[pool_idx] rados_pool_df = rados_pool_df_raw[pool_idx] pool = ceph_pool_df pool.update(rados_pool_df) # Ignore any pools that aren't in our pool list if pool['name'] not in pool_list: if debug: logger.out("Pool {} not in pool list {}".format(pool['name'], pool_list), state='d', prefix='ceph-thread') continue else: if debug: logger.out("Parsing data for pool {}".format(pool['name']), state='d', prefix='ceph-thread') # Assemble a useful data structure pool_df = { 'id': pool['id'], 'stored_bytes': pool['stats']['stored'], 'free_bytes': pool['stats']['max_avail'], 'used_bytes': pool['stats']['bytes_used'], 'used_percent': pool['stats']['percent_used'], 'num_objects': pool['stats']['objects'], 'num_object_clones': pool['num_object_clones'], 'num_object_copies': pool['num_object_copies'], 'num_objects_missing_on_primary': pool['num_objects_missing_on_primary'], 'num_objects_unfound': pool['num_objects_unfound'], 'num_objects_degraded': pool['num_objects_degraded'], 'read_ops': pool['read_ops'], 'read_bytes': pool['read_bytes'], 'write_ops': pool['write_ops'], 'write_bytes': pool['write_bytes'] } # Write the pool data to Zookeeper zkhandler.write([ ('/ceph/pools/{}/stats'.format(pool['name']), str(json.dumps(pool_df))) ]) except Exception as e: # One or more of the status commands timed out, just continue logger.out('Failed to format and send pool data: {}'.format(e), state='w') pass # Only grab OSD stats if there are OSDs to grab (otherwise `ceph osd df` hangs) osds_this_node = 0 if len(osd_list) > 0: # Get data from Ceph OSDs if debug: logger.out("Get data from Ceph OSDs", state='d', prefix='ceph-thread') # Parse the dump data osd_dump = dict() command = {"prefix": "osd dump", "format": "json"} try: retcode, stdout, stderr = common.run_os_command('ceph osd dump --format json --connect-timeout 2', timeout=2) osd_dump_raw = json.loads(stdout)['osds'] except Exception as e: logger.out('Failed to obtain OSD data: {}'.format(e), state='w') osd_dump_raw = [] if debug: logger.out("Loop through OSD dump", state='d', prefix='ceph-thread') for osd in osd_dump_raw: osd_dump.update({ str(osd['osd']): { 'uuid': osd['uuid'], 'up': osd['up'], 'in': osd['in'], 'primary_affinity': osd['primary_affinity'] } }) # Parse the df data if debug: logger.out("Parse the OSD df data", state='d', prefix='ceph-thread') osd_df = dict() command = {"prefix": "osd df", "format": "json"} try: osd_df_raw = json.loads(ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1])['nodes'] except Exception as e: logger.out('Failed to obtain OSD data: {}'.format(e), state='w') osd_df_raw = [] if debug: logger.out("Loop through OSD df", state='d', prefix='ceph-thread') for osd in osd_df_raw: osd_df.update({ str(osd['id']): { 'utilization': osd['utilization'], 'var': osd['var'], 'pgs': osd['pgs'], 'kb': osd['kb'], 'weight': osd['crush_weight'], 'reweight': osd['reweight'], } }) # Parse the status data if debug: logger.out("Parse the OSD status data", state='d', prefix='ceph-thread') osd_status = dict() command = {"prefix": "osd status", "format": "pretty"} try: osd_status_raw = ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1].decode('ascii') except Exception as e: logger.out('Failed to obtain OSD status data: {}'.format(e), state='w') osd_status_raw = [] if debug: logger.out("Loop through OSD status data", state='d', prefix='ceph-thread') for line in osd_status_raw.split('\n'): # Strip off colour line = re.sub(r'\x1b(\[.*?[@-~]|\].*?(\x07|\x1b\\))', '', line) # Split it for parsing line = line.split() if len(line) > 1 and line[1].isdigit(): # This is an OSD line so parse it osd_id = line[1] node = line[3].split('.')[0] used = line[5] avail = line[7] wr_ops = line[9] wr_data = line[11] rd_ops = line[13] rd_data = line[15] state = line[17] osd_status.update({ str(osd_id): { 'node': node, 'used': used, 'avail': avail, 'wr_ops': wr_ops, 'wr_data': wr_data, 'rd_ops': rd_ops, 'rd_data': rd_data, 'state': state } }) # Merge them together into a single meaningful dict if debug: logger.out("Merge OSD data together", state='d', prefix='ceph-thread') osd_stats = dict() for osd in osd_list: if d_osd[osd].node == myhostname: osds_this_node += 1 try: this_dump = osd_dump[osd] this_dump.update(osd_df[osd]) this_dump.update(osd_status[osd]) osd_stats[osd] = this_dump except KeyError as e: # One or more of the status commands timed out, just continue logger.out('Failed to parse OSD stats into dictionary: {}'.format(e), state='w') # Upload OSD data for the cluster (primary-only) if this_node.router_state == 'primary': if debug: logger.out("Trigger updates for each OSD", state='d', prefix='ceph-thread') for osd in osd_list: try: stats = json.dumps(osd_stats[osd]) zkhandler.write([ ('/ceph/osds/{}/stats'.format(osd), str(stats)) ]) except KeyError as e: # One or more of the status commands timed out, just continue logger.out('Failed to upload OSD stats from dictionary: {}'.format(e), state='w') ceph_conn.shutdown() queue.put(ceph_health_colour) queue.put(ceph_health) queue.put(osds_this_node) if debug: logger.out("Thread finished", state='d', prefix='ceph-thread') # State table for pretty stats libvirt_vm_states = { 0: "NOSTATE", 1: "RUNNING", 2: "BLOCKED", 3: "PAUSED", 4: "SHUTDOWN", 5: "SHUTOFF", 6: "CRASHED", 7: "PMSUSPENDED" } # VM stats update function def collect_vm_stats(queue): if debug: logger.out("Thread starting", state='d', prefix='vm-thread') # Connect to libvirt libvirt_name = "qemu:///system" if debug: logger.out("Connecting to libvirt", state='d', prefix='vm-thread') lv_conn = libvirt.open(libvirt_name) if lv_conn is None: logger.out('Failed to open connection to "{}"'.format(libvirt_name), state='e') return memalloc = 0 memprov = 0 vcpualloc = 0 # Toggle state management of dead VMs to restart them if debug: logger.out("Toggle state management of dead VMs to restart them", state='d', prefix='vm-thread') # Make a copy of the d_domain; if not, and it changes in flight, this can fail fixed_d_domain = this_node.d_domain.copy() for domain, instance in fixed_d_domain.items(): if domain in this_node.domain_list: # Add the allocated memory to our memalloc value memalloc += instance.getmemory() memprov += instance.getmemory() vcpualloc += instance.getvcpus() if instance.getstate() == 'start' and instance.getnode() == this_node.name: if instance.getdom() is not None: try: if instance.getdom().state()[0] != libvirt.VIR_DOMAIN_RUNNING: logger.out("VM {} has failed".format(instance.domname), state='w', prefix='vm-thread') raise except Exception: # Toggle a state "change" logger.out("Resetting state to {} for VM {}".format(instance.getstate(), instance.domname), state='i', prefix='vm-thread') zkhandler.write([ ('/domains/{}/state'.format(domain), instance.getstate()) ]) elif instance.getnode() == this_node.name: memprov += instance.getmemory() # Get list of running domains from Libvirt running_domains = lv_conn.listAllDomains(libvirt.VIR_CONNECT_LIST_DOMAINS_ACTIVE) # Get statistics from any running VMs for domain in running_domains: try: # Get basic information about the VM tree = ElementTree.fromstring(domain.XMLDesc()) domain_uuid = domain.UUIDString() domain_name = domain.name() # Get all the raw information about the VM if debug: logger.out("Getting general statistics for VM {}".format(domain_name), state='d', prefix='vm-thread') domain_state, domain_maxmem, domain_mem, domain_vcpus, domain_cputime = domain.info() # We can't properly gather stats from a non-running VMs so continue if domain_state != libvirt.VIR_DOMAIN_RUNNING: continue domain_memory_stats = domain.memoryStats() domain_cpu_stats = domain.getCPUStats(True)[0] except Exception as e: if debug: try: logger.out("Failed getting VM information for {}: {}".format(domain.name(), e), state='d', prefix='vm-thread') except Exception: pass continue # Ensure VM is present in the domain_list if domain_uuid not in this_node.domain_list: this_node.domain_list.append(domain_uuid) if debug: logger.out("Getting disk statistics for VM {}".format(domain_name), state='d', prefix='vm-thread') domain_disk_stats = [] for disk in tree.findall('devices/disk'): disk_name = disk.find('source').get('name') if not disk_name: disk_name = disk.find('source').get('file') disk_stats = domain.blockStats(disk.find('target').get('dev')) domain_disk_stats.append({ "name": disk_name, "rd_req": disk_stats[0], "rd_bytes": disk_stats[1], "wr_req": disk_stats[2], "wr_bytes": disk_stats[3], "err": disk_stats[4] }) if debug: logger.out("Getting network statistics for VM {}".format(domain_name), state='d', prefix='vm-thread') domain_network_stats = [] for interface in tree.findall('devices/interface'): interface_name = interface.find('target').get('dev') interface_bridge = interface.find('source').get('bridge') interface_stats = domain.interfaceStats(interface_name) domain_network_stats.append({ "name": interface_name, "bridge": interface_bridge, "rd_bytes": interface_stats[0], "rd_packets": interface_stats[1], "rd_errors": interface_stats[2], "rd_drops": interface_stats[3], "wr_bytes": interface_stats[4], "wr_packets": interface_stats[5], "wr_errors": interface_stats[6], "wr_drops": interface_stats[7] }) # Create the final dictionary domain_stats = { "state": libvirt_vm_states[domain_state], "maxmem": domain_maxmem, "livemem": domain_mem, "cpus": domain_vcpus, "cputime": domain_cputime, "mem_stats": domain_memory_stats, "cpu_stats": domain_cpu_stats, "disk_stats": domain_disk_stats, "net_stats": domain_network_stats } if debug: logger.out("Writing statistics for VM {} to Zookeeper".format(domain_name), state='d', prefix='vm-thread') try: zkhandler.write([ ("/domains/{}/stats".format(domain_uuid), str(json.dumps(domain_stats))) ]) except Exception as e: if debug: logger.out("{}".format(e), state='d', prefix='vm-thread') # Close the Libvirt connection lv_conn.close() queue.put(len(running_domains)) queue.put(memalloc) queue.put(memprov) queue.put(vcpualloc) if debug: logger.out("Thread finished", state='d', prefix='vm-thread') # Keepalive update function def node_keepalive(): if debug: logger.out("Keepalive starting", state='d', prefix='main-thread') # Set the migration selector in Zookeeper for clients to read if config['enable_hypervisor']: if this_node.router_state == 'primary': try: if zkhandler.read('/config/migration_target_selector') != config['migration_target_selector']: raise except Exception: zkhandler.write([ ('/config/migration_target_selector', config['migration_target_selector']) ]) # Set the upstream IP in Zookeeper for clients to read if config['enable_networking']: if this_node.router_state == 'primary': try: if zkhandler.read('/config/upstream_ip') != config['upstream_floating_ip']: raise except Exception: zkhandler.write([ ('/config/upstream_ip', config['upstream_floating_ip']) ]) # Get past state and update if needed if debug: logger.out("Get past state and update if needed", state='d', prefix='main-thread') past_state = zkhandler.read('/nodes/{}/daemonstate'.format(this_node.name)) if past_state != 'run': this_node.daemon_state = 'run' zkhandler.write([ ('/nodes/{}/daemonstate'.format(this_node.name), 'run') ]) else: this_node.daemon_state = 'run' # Ensure the primary key is properly set if debug: logger.out("Ensure the primary key is properly set", state='d', prefix='main-thread') if this_node.router_state == 'primary': if zkhandler.read('/config/primary_node') != this_node.name: zkhandler.write([ ('/config/primary_node', this_node.name) ]) # Run VM statistics collection in separate thread for parallelization if enable_hypervisor: vm_thread_queue = Queue() vm_stats_thread = Thread(target=collect_vm_stats, args=(vm_thread_queue,), kwargs={}) vm_stats_thread.start() # Run Ceph status collection in separate thread for parallelization if enable_storage: ceph_thread_queue = Queue() ceph_stats_thread = Thread(target=collect_ceph_stats, args=(ceph_thread_queue,), kwargs={}) ceph_stats_thread.start() # Get node performance statistics this_node.memtotal = int(psutil.virtual_memory().total / 1024 / 1024) this_node.memused = int(psutil.virtual_memory().used / 1024 / 1024) this_node.memfree = int(psutil.virtual_memory().free / 1024 / 1024) this_node.cpuload = os.getloadavg()[0] # Join against running threads if enable_hypervisor: vm_stats_thread.join(timeout=4.0) if vm_stats_thread.is_alive(): logger.out('VM stats gathering exceeded 4s timeout, continuing', state='w') if enable_storage: ceph_stats_thread.join(timeout=4.0) if ceph_stats_thread.is_alive(): logger.out('Ceph stats gathering exceeded 4s timeout, continuing', state='w') # Get information from thread queues if enable_hypervisor: try: this_node.domains_count = vm_thread_queue.get() this_node.memalloc = vm_thread_queue.get() this_node.memprov = vm_thread_queue.get() this_node.vcpualloc = vm_thread_queue.get() except Exception: pass else: this_node.domains_count = 0 this_node.memalloc = 0 this_node.memprov = 0 this_node.vcpualloc = 0 if enable_storage: try: ceph_health_colour = ceph_thread_queue.get() ceph_health = ceph_thread_queue.get() osds_this_node = ceph_thread_queue.get() except Exception: ceph_health_colour = fmt_cyan ceph_health = 'UNKNOWN' osds_this_node = '?' # Set our information in zookeeper keepalive_time = int(time.time()) if debug: logger.out("Set our information in zookeeper", state='d', prefix='main-thread') try: zkhandler.write([ ('/nodes/{}/memtotal'.format(this_node.name), str(this_node.memtotal)), ('/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/{}/memprov'.format(this_node.name), str(this_node.memprov)), ('/nodes/{}/vcpualloc'.format(this_node.name), str(this_node.vcpualloc)), ('/nodes/{}/cpuload'.format(this_node.name), str(this_node.cpuload)), ('/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 Exception: logger.out('Failed to set keepalive data', state='e') return # Display node information to the terminal if config['log_keepalives']: if this_node.router_state == 'primary': cst_colour = fmt_green elif this_node.router_state == 'secondary': cst_colour = fmt_blue else: cst_colour = fmt_cyan logger.out( '{}{} keepalive{} [{}{}{}]'.format( fmt_purple, myhostname, fmt_end, fmt_bold + cst_colour, this_node.router_state, fmt_end ), state='t' ) if config['log_keepalive_cluster_details']: logger.out( '{bold}Maintenance:{nofmt} {maint} ' '{bold}Active VMs:{nofmt} {domcount} ' '{bold}Networks:{nofmt} {netcount} ' '{bold}Load:{nofmt} {load} ' '{bold}Memory [MiB]: VMs:{nofmt} {allocmem} ' '{bold}Used:{nofmt} {usedmem} ' '{bold}Free:{nofmt} {freemem}'.format( bold=fmt_bold, nofmt=fmt_end, maint=maintenance, domcount=this_node.domains_count, netcount=len(network_list), load=this_node.cpuload, freemem=this_node.memfree, usedmem=this_node.memused, allocmem=this_node.memalloc, ), state='t' ) if enable_storage and config['log_keepalive_storage_details']: logger.out( '{bold}Ceph cluster status:{nofmt} {health_colour}{health}{nofmt} ' '{bold}Total OSDs:{nofmt} {total_osds} ' '{bold}Node OSDs:{nofmt} {node_osds} ' '{bold}Pools:{nofmt} {total_pools} '.format( bold=fmt_bold, health_colour=ceph_health_colour, nofmt=fmt_end, health=ceph_health, total_osds=len(osd_list), node_osds=osds_this_node, total_pools=len(pool_list) ), state='t' ) # Look for dead nodes and fence them if not maintenance: if debug: logger.out("Look for dead nodes and fence them", state='d', prefix='main-thread') if config['daemon_mode'] == 'coordinator': for node_name in d_node: try: node_daemon_state = zkhandler.read('/nodes/{}/daemonstate'.format(node_name)) node_keepalive = int(zkhandler.read('/nodes/{}/keepalive'.format(node_name))) except Exception: node_daemon_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') zk_lock = zkhandler.writelock('/nodes/{}/daemonstate'.format(node_name)) with zk_lock: # Ensures that, if we lost the lock race and come out of waiting, # we won't try to trigger our own fence thread. if zkhandler.read('/nodes/{}/daemonstate'.format(node_name)) != 'dead': fence_thread = Thread(target=fencing.fenceNode, args=(node_name, zkhandler, config, logger), kwargs={}) fence_thread.start() # Write the updated data after we start the fence thread zkhandler.write([ ('/nodes/{}/daemonstate'.format(node_name), 'dead') ]) if debug: logger.out("Keepalive finished", state='d', prefix='main-thread') # Start keepalive thread update_timer = startKeepaliveTimer() # Tick loop; does nothing since everything else is async while True: try: time.sleep(1) except Exception: break