class DBSyncDaemon(SonicSyncDaemon):
"""
A Thread that listens to changes in CONFIG DB,
and contains handlers to configure lldpd accordingly.
"""
def __init__(self):
super(DBSyncDaemon, self).__init__()
self.config_db = ConfigDBConnector()
self.config_db.connect()
logger.info("[lldp dbsyncd] Connected to configdb")
self.port_table = {}
def run_command(self, command):
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
stdout = p.communicate()[0]
p.wait()
if p.returncode != 0:
logger.error("[lldp dbsyncd] command execution returned {}. "
"Command: '{}', stdout: '{}'".format(p.returncode, command, stdout))
def port_handler(self, key, data):
"""
Handle updates in 'PORT' table.
"""
# we're interested only in description for now
if self.port_table[key].get("description") != data.get("description"):
new_descr = data.get("description", " ")
logger.info("[lldp dbsyncd] Port {} description changed to {}."
.format(key, new_descr))
self.run_command("lldpcli configure lldp portidsubtype local {} description '{}'"
.format(key, new_descr))
# update local cache
self.port_table[key] = data
def run(self):
self.port_table = self.config_db.get_table('PORT')
# supply LLDP_LOC_ENTRY_TABLE and lldpd with correct values on start
for port_name, attributes in self.port_table.items():
self.run_command("lldpcli configure lldp portidsubtype local {} description '{}'"
.format(port_name, attributes.get("description", " ")))
# subscribe for further changes
self.config_db.subscribe('PORT', lambda table, key, data:
self.port_handler(key, data))
logger.info("[lldp dbsyncd] Subscribed to configdb PORT table")
self.config_db.listen()
class DBSyncDaemon(SonicSyncDaemon):
"""
A Thread that listens to changes in CONFIG DB,
and contains handlers to configure lldpd accordingly.
"""
def __init__(self):
super(DBSyncDaemon, self).__init__()
self.config_db = ConfigDBConnector()
self.config_db.connect()
logger.info("[lldp dbsyncd] Connected to configdb")
self.port_table = {}
def run_command(self, command):
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)
stdout = p.communicate()[0]
p.wait()
if p.returncode != 0:
logger.error("[lldp dbsyncd] command execution returned {}. "
"Command: '{}', stdout: '{}'".format(
p.returncode, command, stdout))
def port_handler(self, key, data):
"""
Handle updates in 'PORT' table.
"""
# we're interested only in description for now
if self.port_table[key].get("description") != data.get("description"):
new_descr = data.get("description", " ")
logger.info(
"[lldp dbsyncd] Port {} description changed to {}.".format(
key, new_descr))
self.run_command(
"lldpcli configure lldp portidsubtype local {} description '{}'"
.format(key, new_descr))
# update local cache
self.port_table[key] = data
def mgmt_addr_init(self):
man_table = self.config_db.get_table(MGMT_INTERFACE_TABLE_NAME)
# example table:
# {('eth0', 'FC00:2::32/64'): {'forced_mgmt_routes': ['10.0.0.100/31'], 'gwaddr': 'fc00:2::fe'},
# ('eth0', '10.224.23.69/24'): {'gwaddr': '10.224.23.254'}}
mgmt_ips = [i[1].split('/')[0] for i in man_table.keys()]
ipv4_mgmt_ips = [i for i in mgmt_ips if re.match(IPV4_PATTERN, i)]
try:
self.run_command(
"lldpcli configure system ip management pattern {}".format(
ipv4_mgmt_ips[0]))
logger.debug("Configured lldpd with {} local management ip".format(
ipv4_mgmt_ips[0]))
except IndexError:
logger.error("No IPv4 management interface found")
def port_table_init(self):
self.port_table = self.config_db.get_table(PORT_TABLE_NAME)
# supply LLDP_LOC_ENTRY_TABLE and lldpd with correct values on start
for port_name, attributes in self.port_table.items():
self.run_command(
"lldpcli configure lldp portidsubtype local {} description '{}'"
.format(port_name, attributes.get("description", " ")))
def run(self):
self.port_table_init()
self.mgmt_addr_init()
# subscribe for further changes
self.config_db.subscribe(
PORT_TABLE_NAME,
lambda table, key, data: self.port_handler(key, data))
logger.info("[lldp dbsyncd] Subscribed to configdb PORT table")
self.config_db.listen()