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Replace schema paths with updated zkhandler

This commit is contained in:
Joshua Boniface 2021-06-09 13:28:31 -04:00
parent a9a57533a7
commit f913f42a6d
1 changed files with 102 additions and 109 deletions
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211
node-daemon/pvcnoded/Daemon.py
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@ -39,7 +39,7 @@ from queue import Queue
from xml.etree import ElementTree
from rados import Rados
from daemon_lib.zkhandler import ZKHandler, ZKSchema
from daemon_lib.zkhandler import ZKHandler
import pvcnoded.fencing as fencing
import daemon_lib.log as log
@ -533,39 +533,36 @@ except Exception as e:
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)))
node_schema_version = int(zkhandler.read(('node.data.active_schema', myhostname)))
except Exception:
node_schema_version = zkhandler.read(zkschema.path('base.schema.version'))
node_schema_version = zkhandler.read('base.schema.version')
zkhandler.write([
(zkschema.path('node.data.active_schema', myhostname), node_schema_version)
(('node.data.active_schema', myhostname), node_schema_version)
])
# Load in the current node schema version
zkschema.load(node_schema_version)
zkhandler.schema.load(node_schema_version)
# Record the latest intalled schema version
latest_schema_version = ZKSchema.find_latest()
latest_schema_version = zkhandler.schema.find_latest()
zkhandler.write([
(zkschema.path('node.data.latest_schema', myhostname), latest_schema_version)
(('node.data.latest_schema', myhostname), latest_schema_version)
])
# Validate our schema against that version
if not zkschema.validate(zkhandler, logger):
if not zkhandler.schema.validate(zkhandler, logger):
logger.out('Found schema violations, applying', state='i')
zkschema.apply(zkhandler)
zkhandler.schema.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'))
@zkhandler.zk_conn.DataWatch(zkhandler.schema.path('base.schema.version'))
def update_schema(new_schema_version, stat, event=''):
global zkschema, zkhandler, update_timer, node_schema_version
global zkhandler, update_timer, node_schema_version
new_schema_version = int(new_schema_version.decode('ascii'))
@ -580,34 +577,34 @@ def update_schema(new_schema_version, stat, event=''):
time.sleep(1)
# Perform the migration (primary only)
if zkhandler.read(zkschema.path('base.config.primary_node')) == myhostname:
if zkhandler.read('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('/'):
with zkhandler.exclusivelock('base.schema.version'):
# 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)
zkhandler.schema.migrate(zkhandler, new_schema_version)
if new_schema_version < node_schema_version:
zkschema.rollback(zkhandler, new_schema_version)
zkhandler.schema.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 = zkhandler.readlock('base.schema.version')
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.schema.load(new_schema_version)
zkhandler.write([
(zkschema.path('node.data.active_schema', myhostname), new_schema_version)
(('node.data.active_schema', myhostname), new_schema_version)
])
node_schema_version = new_schema_version
time.sleep(1)
@ -617,7 +614,7 @@ def update_schema(new_schema_version, stat, event=''):
update_timer = startKeepaliveTimer()
# Restart the API daemons if applicable
if zkhandler.read(zkschema.path('base.config.primary_node')) == myhostname:
if zkhandler.read('base.config.primary_node') == myhostname:
common.run_os_command('systemctl start pvcapid.service')
common.run_os_command('systemctl start pvcapid-worker.service')
@ -625,14 +622,14 @@ def update_schema(new_schema_version, stat, event=''):
# 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))))
for node in zkhandler.children('base.node'):
node_latest_schema_version.append(int(zkhandler.read(('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)
('base.schema.version', latest_schema_version)
])
###############################################################################
@ -642,13 +639,13 @@ if latest_schema_version > node_schema_version:
# Cleanup function
def cleanup():
global zkhandler, zkschema, update_timer, d_domain
global zkhandler, 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')
(('node.state.daemon', myhostname), 'shutdown')
])
# Waiting for any flushes to complete
@ -671,7 +668,7 @@ def cleanup():
try:
if this_node.router_state == 'primary':
zkhandler.write([
('/config/primary_node', 'none')
('base.config.primary_node', 'none')
])
logger.out('Waiting for primary migration', state='s')
while this_node.router_state != 'secondary':
@ -692,7 +689,7 @@ def cleanup():
# Set stop state in Zookeeper
zkhandler.write([
('/nodes/{}/daemonstate'.format(myhostname), 'stop')
(('node.state.daemon', myhostname), 'stop')
])
# Forcibly terminate dnsmasq because it gets stuck sometimes
@ -700,7 +697,6 @@ def cleanup():
# Close the Zookeeper connection
try:
del zkschema
zkhandler.disconnect()
del zkhandler
except Exception:
@ -736,50 +732,47 @@ if config['daemon_mode'] == 'coordinator':
init_routerstate = 'secondary'
else:
init_routerstate = 'client'
if zkhandler.exists('/nodes/{}'.format(myhostname)):
if zkhandler.exists(('node', 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'])
(('node.mode', myhostname), config['daemon_mode']),
(('node.state.daemon', myhostname), 'init'),
(('node.state.router', myhostname), init_routerstate),
(('node.data.static', myhostname), ' '.join(staticdata)),
(('node.ipmi.hostname', myhostname), config['ipmi_hostname']),
(('node.ipmi.username', myhostname), config['ipmi_username']),
(('node.ipmi.password', 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'])
(('node', myhostname), config['daemon_mode']),
(('node.keepalive', myhostname), str(keepalive_time)),
(('node.mode', myhostname), config['daemon_mode']),
(('node.state.daemon', myhostname), 'init'),
(('node.state.domain', myhostname), 'flushed'),
(('node.state.router', myhostname), init_routerstate),
(('node.data.static', myhostname), ' '.join(staticdata)),
(('node.ipmi.hostname', myhostname), config['ipmi_hostname']),
(('node.ipmi.username', myhostname), config['ipmi_username']),
(('node.ipmi.password', myhostname), config['ipmi_password']),
(('node.memory.total', myhostname), '0'),
(('node.memory.used', myhostname), '0'),
(('node.memory.free', myhostname), '0'),
(('node.memory.allocated', myhostname), '0'),
(('node.memory.provisioned', myhostname), '0'),
(('node.vcpu.allocated', myhostname), '0'),
(('node.cpu.load', myhostname), '0.0'),
(('node.running_domains', myhostname), '0'),
(('node.count.provisioned_domains', myhostname), '0'),
(('node.count.networks', myhostname), '0'),
])
# Check that the primary key exists, and create it with us as master if not
try:
current_primary = zkhandler.read('/config/primary_node')
current_primary = zkhandler.read('base.config.primary_node')
except kazoo.exceptions.NoNodeError:
current_primary = 'none'
@ -787,9 +780,9 @@ 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')
logger.out('No primary node found; setting us as primary.', state='i')
zkhandler.write([
('/config/primary_node', myhostname)
('base.config.primary_node', myhostname)
])
###############################################################################
@ -896,7 +889,7 @@ else:
# Node objects
@zkhandler.zk_conn.ChildrenWatch('/nodes')
@zkhandler.zk_conn.ChildrenWatch(zkhandler.schema.path('base.node'))
def update_nodes(new_node_list):
global node_list, d_node
@ -925,7 +918,7 @@ this_node = d_node[myhostname]
# Maintenance mode
@zkhandler.zk_conn.DataWatch('/config/maintenance')
@zkhandler.zk_conn.DataWatch(zkhandler.schema.path('base.config.maintenance'))
def set_maintenance(_maintenance, stat, event=''):
global maintenance
try:
@ -935,7 +928,7 @@ def set_maintenance(_maintenance, stat, event=''):
# Primary node
@zkhandler.zk_conn.DataWatch('/config/primary_node')
@zkhandler.zk_conn.DataWatch(zkhandler.schema.path('base.config.primary_node'))
def update_primary(new_primary, stat, event=''):
try:
new_primary = new_primary.decode('ascii')
@ -950,7 +943,7 @@ def update_primary(new_primary, stat, event=''):
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')
primary_lock = zkhandler.exclusivelock('base.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
@ -958,9 +951,9 @@ def update_primary(new_primary, stat, event=''):
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:
if key_version == zkhandler.zk_conn.get(zkhandler.schema.path('base.config.primary_node'))[1].version:
zkhandler.write([
('/config/primary_node', myhostname)
('base.config.primary_node', myhostname)
])
# Cleanly release the lock
primary_lock.release()
@ -971,17 +964,17 @@ def update_primary(new_primary, stat, event=''):
if this_node.router_state == 'secondary':
time.sleep(0.5)
zkhandler.write([
('/nodes/{}/routerstate'.format(myhostname), 'takeover')
(('node.state.router', myhostname), 'takeover')
])
else:
if this_node.router_state == 'primary':
time.sleep(0.5)
zkhandler.write([
('/nodes/{}/routerstate'.format(myhostname), 'relinquish')
(('node.state.router', myhostname), 'relinquish')
])
else:
zkhandler.write([
('/nodes/{}/routerstate'.format(myhostname), 'client')
(('node.state.router', myhostname), 'client')
])
for node in d_node:
@ -990,7 +983,7 @@ def update_primary(new_primary, stat, event=''):
if enable_networking:
# Network objects
@zkhandler.zk_conn.ChildrenWatch('/networks')
@zkhandler.zk_conn.ChildrenWatch(zkhandler.schema.path('base.network'))
def update_networks(new_network_list):
global network_list, d_network
@ -1033,13 +1026,13 @@ if enable_networking:
if enable_hypervisor:
# VM command pipeline key
@zkhandler.zk_conn.DataWatch('/cmd/domains')
@zkhandler.zk_conn.DataWatch(zkhandler.schema.path('base.cmd.domain'))
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')
@zkhandler.zk_conn.ChildrenWatch(zkhandler.schema.path('base.domain'))
def update_domains(new_domain_list):
global domain_list, d_domain
@ -1064,13 +1057,13 @@ if enable_hypervisor:
if enable_storage:
# Ceph command pipeline key
@zkhandler.zk_conn.DataWatch('/cmd/ceph')
@zkhandler.zk_conn.DataWatch(zkhandler.schema.path('base.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')
@zkhandler.zk_conn.ChildrenWatch(zkhandler.schema.path('base.osd'))
def update_osds(new_osd_list):
global osd_list, d_osd
@ -1090,7 +1083,7 @@ if enable_storage:
logger.out('{}OSD list:{} {}'.format(fmt_blue, fmt_end, ' '.join(osd_list)), state='i')
# Pool objects
@zkhandler.zk_conn.ChildrenWatch('/ceph/pools')
@zkhandler.zk_conn.ChildrenWatch(zkhandler.schema.path('base.pool'))
def update_pools(new_pool_list):
global pool_list, d_pool
@ -1113,7 +1106,7 @@ if enable_storage:
# Volume objects in each pool
for pool in pool_list:
@zkhandler.zk_conn.ChildrenWatch('/ceph/volumes/{}'.format(pool))
@zkhandler.zk_conn.childrenWatch(zkhandler.schema.path('volume', pool))
def update_volumes(new_volume_list):
global volume_list, d_volume
@ -1180,7 +1173,7 @@ def collect_ceph_stats(queue):
ceph_status = ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1].decode('ascii')
try:
zkhandler.write([
('/ceph', str(ceph_status))
('base.storage', str(ceph_status))
])
except Exception as e:
logger.out('Failed to set Ceph status data: {}'.format(e), state='e')
@ -1194,7 +1187,7 @@ def collect_ceph_stats(queue):
ceph_df = ceph_conn.mon_command(json.dumps(command), b'', timeout=1)[1].decode('ascii')
try:
zkhandler.write([
('/ceph/util', str(ceph_df))
('base.storage.util', str(ceph_df))
])
except Exception as e:
logger.out('Failed to set Ceph utilization data: {}'.format(e), state='e')
@ -1259,7 +1252,7 @@ def collect_ceph_stats(queue):
# Write the pool data to Zookeeper
zkhandler.write([
('/ceph/pools/{}/stats'.format(pool['name']), str(json.dumps(pool_df)))
(('pool.stats', pool['name']), str(json.dumps(pool_df)))
])
except Exception as e:
# One or more of the status commands timed out, just continue
@ -1395,7 +1388,7 @@ def collect_ceph_stats(queue):
try:
stats = json.dumps(osd_stats[osd])
zkhandler.write([
('/ceph/osds/{}/stats'.format(osd), str(stats))
(('osd.stats', osd), str(stats))
])
except KeyError as e:
# One or more of the status commands timed out, just continue
@ -1462,7 +1455,7 @@ def collect_vm_stats(queue):
# 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())
(('domain.state', domain), instance.getstate())
])
elif instance.getnode() == this_node.name:
memprov += instance.getmemory()
@ -1554,7 +1547,7 @@ def collect_vm_stats(queue):
try:
zkhandler.write([
("/domains/{}/stats".format(domain_uuid), str(json.dumps(domain_stats)))
(('domain.stats', domain_uuid), str(json.dumps(domain_stats)))
])
except Exception as e:
if debug:
@ -1581,32 +1574,32 @@ def node_keepalive():
if config['enable_hypervisor']:
if this_node.router_state == 'primary':
try:
if zkhandler.read('/config/migration_target_selector') != config['migration_target_selector']:
if zkhandler.read('base.config.migration_target_selector') != config['migration_target_selector']:
raise
except Exception:
zkhandler.write([
('/config/migration_target_selector', config['migration_target_selector'])
('base.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']:
if zkhandler.read('base.config.upstream_ip') != config['upstream_floating_ip']:
raise
except Exception:
zkhandler.write([
('/config/upstream_ip', config['upstream_floating_ip'])
('base.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))
past_state = zkhandler.read(('node.state.daemon', this_node.name))
if past_state != 'run':
this_node.daemon_state = 'run'
zkhandler.write([
('/nodes/{}/daemonstate'.format(this_node.name), 'run')
(('node.state.daemon', this_node.name), 'run')
])
else:
this_node.daemon_state = 'run'
@ -1615,9 +1608,9 @@ def node_keepalive():
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:
if zkhandler.read('base.config.primary_node') != this_node.name:
zkhandler.write([
('/config/primary_node', this_node.name)
('base.config.primary_node', this_node.name)
])
# Run VM statistics collection in separate thread for parallelization
@ -1679,16 +1672,16 @@ def node_keepalive():
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))
(('node.memory.total', this_node.name), str(this_node.memtotal)),
(('node.memory.used', this_node.name), str(this_node.memused)),
(('node.memory.free', this_node.name), str(this_node.memfree)),
(('node.memory.allocated', this_node.name), str(this_node.memalloc)),
(('node.memory.provisioned', this_node.name), str(this_node.memprov)),
(('node.vcpu.allocated', this_node.name), str(this_node.vcpualloc)),
(('node.cpu.load', this_node.name), str(this_node.cpuload)),
(('node.count.provisioned_domains', this_node.name), str(this_node.domains_count)),
(('node.running_domains', this_node.name), ' '.join(this_node.domain_list)),
(('node.keepalive', this_node.name), str(keepalive_time)),
])
except Exception:
logger.out('Failed to set keepalive data', state='e')
@ -1758,8 +1751,8 @@ def node_keepalive():
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)))
node_daemon_state = zkhandler.read(('node.state.daemon', node_name))
node_keepalive = int(zkhandler.read(('node.keepalive', node_name)))
except Exception:
node_daemon_state = 'unknown'
node_keepalive = 0
@ -1770,16 +1763,16 @@ def node_keepalive():
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))
zk_lock = zkhandler.writelock(('node.state.daemon', 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':
if zkhandler.read(('node.state.daemon', 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')
(('node.state.daemon', node_name), 'dead')
])
if debug: