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#!/usr/bin/env python3
import argparse
import sys
import ovs.db.idl
import ovs.poller
import ovs.stream
import ovs.vlog
from ovs.db import error
vlog = ovs.vlog.Vlog('template-lb-stress')
vlog.set_levels_from_string('console:info')
vlog.init(None)
SCHEMA = '../ovn-nb.ovsschema'
def die(msg):
vlog.warn(f'Fatal error encountered: {msg}')
sys.exit(1)
def create_topology(idl, n):
vlog.info('Creating topology')
txn = ovs.db.idl.Transaction(idl)
lbg = txn.insert(idl.tables['Load_Balancer_Group'])
lbg.name = 'lbg'
vlog.info('Adding join switch')
join_sw = txn.insert(idl.tables['Logical_Switch'])
join_sw.name = 'join'
cluster_rtr = txn.insert(idl.tables['Logical_Router'])
cluster_rtr.name = 'cluster'
rcj = txn.insert(idl.tables['Logical_Router_Port'])
rcj.name = 'rcj'
rcj.mac = '00:00:00:00:00:01'
rcj.networks = ['10.0.0.1/8']
cluster_rtr.addvalue('ports', rcj.uuid)
sjc = txn.insert(idl.tables['Logical_Switch_Port'])
sjc.name = 'sjc'
sjc.type = 'router'
sjc.addresses = ['router']
sjc.setkey('options', 'router-port', 'rcj')
join_sw.addvalue('ports', sjc.uuid)
for i in range(n):
vlog.info(f'Provisioning node {i}')
chassis = f'chassis-{i}'
gwr = txn.insert(idl.tables['Logical_Router'])
gwr.name = f'lr-{i}'
gwr.addvalue('load_balancer_group', lbg.uuid)
gwr.setkey('options', 'chassis', chassis)
gwr2join = txn.insert(idl.tables['Logical_Router_Port'])
gwr2join.name = f'lr2j-{i}'
gwr2join.mac = '00:00:00:00:00:01'
gwr2join.networks = ['10.0.0.1/8']
gwr.addvalue('ports', gwr2join.uuid)
join2gwr = txn.insert(idl.tables['Logical_Switch_Port'])
join2gwr.name = f'j2lr-{i}'
join2gwr.type = 'router'
join2gwr.addresses = ['router']
join2gwr.setkey('options', 'router-port', gwr2join.name)
join_sw.addvalue('ports', join2gwr.uuid)
s = txn.insert(idl.tables['Logical_Switch'])
s.name = f'ls-{i}'
s.addvalue('load_balancer_group', lbg.uuid)
cluster2s = txn.insert(idl.tables['Logical_Router_Port'])
cluster2s.name = f'c2s-{i}'
cluster2s.mac = '00:00:00:00:00:01'
cluster2s.networks = ['10.0.0.1/8']
cluster_rtr.addvalue('ports', cluster2s.uuid)
gw_chassis = txn.insert(idl.tables['Gateway_Chassis'])
gw_chassis.name = f'{cluster2s.name}-{chassis}'
gw_chassis.chassis_name = chassis
gw_chassis.priority = 1
cluster2s.addvalue('gateway_chassis', gw_chassis.uuid)
s2cluster = txn.insert(idl.tables['Logical_Switch_Port'])
s2cluster.name = f's2c-{i}'
s2cluster.type = 'router'
s2cluster.addresses = ['router']
s2cluster.setkey('options', 'router-port', cluster2s.name)
s.addvalue('ports', s2cluster.uuid)
lsp = txn.insert(idl.tables['Logical_Switch_Port'])
lsp.name = f'lsp-{i}'
s.addvalue('ports', lsp.uuid)
if txn.commit_block() != ovs.db.idl.Transaction.SUCCESS:
die(f'Failed to create topology ({txn.get_error()}')
def add_template_lbs(idl, n, n_vips):
lbg = next(iter(idl.tables['Load_Balancer_Group'].rows.values()))
for i in range(n_vips):
vlog.info(f'Adding LB {i}')
txn = ovs.db.idl.Transaction(idl)
lb = txn.insert(idl.tables['Load_Balancer'])
lb.name = f'lb-{i}'
lb.setkey('options', 'template', 'true')
lb.setkey('options', 'address-family', 'ipv4')
lb.setkey('vips', f'^vip:{i}', f'^backends{i}')
lb.protocol = 'tcp'
lbg.addvalue('load_balancer', lb.uuid)
if txn.commit_block() != ovs.db.idl.Transaction.SUCCESS:
die(f'Failed to add LB ({txn.get_error()}')
def add_chassis_template_vars(idl, n, n_vips, n_backends):
for i in range(n):
vlog.info(f'Adding LB vars for node {i}')
txn = ovs.db.idl.Transaction(idl)
tv = txn.insert(idl.tables['Chassis_Template_Var'])
tv.chassis = f'chassis-{i}'
tv.setkey('variables', 'vip', f'42.42.42.{i}')
for j in range(n_vips):
port = j + 1
j1 = (j + 1) // 250
j2 = (j + 1) % 250
backends = [f'42.{k}.{j1}.{j2}:{port}' for k in range(n_backends)]
tv.setkey('variables', f'backends{j}', ','.join(backends))
if txn.commit_block() != ovs.db.idl.Transaction.SUCCESS:
die(f'Failed to add template vars ({txn.get_error()}')
def find_by_name(idl, table, name):
for row in idl.tables[table].rows.values():
if row.name == name:
return row
return None
def add_explicit_lbs(idl, n, n_vips, n_backends):
for i in range(n):
lr = find_by_name(idl, 'Logical_Router', f'lr-{i}')
ls = find_by_name(idl, 'Logical_Switch', f'ls-{i}')
for j in range(n_vips):
vlog.info(f'Adding LB {j} for node {i}')
txn = ovs.db.idl.Transaction(idl)
port = j + 1
j1 = (j + 1) // 250
j2 = (j + 1) % 250
backends = [f'42.{k}.{j1}.{j2}:{port}' for k in range(n_backends)]
lb = txn.insert(idl.tables['Load_Balancer'])
lb.name = f'lb-{j}-{i}'
lb.setkey('vips', f'42.42.42.{i}:{port}', f'{",".join(backends)}')
lb.protocol = 'tcp'
lr.addvalue('load_balancer', lb.uuid)
ls.addvalue('load_balancer', lb.uuid)
if txn.commit_block() != ovs.db.idl.Transaction.SUCCESS:
die(f'Failed to add LB ({txn.get_error()}')
def run(remote, n, n_vips, n_backends, templates):
schema_helper = ovs.db.idl.SchemaHelper(SCHEMA)
schema_helper.register_all()
idl = ovs.db.idl.Idl(remote, schema_helper, leader_only=False)
seqno = 0
error, stream = ovs.stream.Stream.open_block(
ovs.stream.Stream.open(remote), 2000
)
if error:
sys.stderr.write(f'failed to connect to \"{remote}\"')
sys.exit(1)
if not stream:
sys.stderr.write(f'failed to connect to \"{remote}\"')
sys.exit(1)
rpc = ovs.jsonrpc.Connection(stream)
while idl.change_seqno == seqno and not idl.run():
rpc.run()
poller = ovs.poller.Poller()
idl.wait(poller)
rpc.wait(poller)
poller.block()
create_topology(idl, n)
if templates:
add_template_lbs(idl, n, n_vips)
add_chassis_template_vars(idl, n, n_vips, n_backends)
else:
add_explicit_lbs(idl, n, n_vips, n_backends)
def main(argv):
parser = argparse.ArgumentParser()
parser.add_argument(
'-n', '--nodes', type=int, required=True, help='Number of nodes'
)
parser.add_argument(
'-v', '--vips', type=int, required=True, help='Number of LB VIPs'
)
parser.add_argument(
'-b',
'--backends',
type=int,
required=True,
help='Number backends per VIP',
)
parser.add_argument(
'-r', '--remote', required=True, help='NB connection string'
)
parser.add_argument(
'-t',
'--template',
action='store_true',
help='Use LB Templates?',
)
parser.set_defaults(template=False)
args = parser.parse_args()
run(args.remote, args.nodes, args.vips, args.backends, args.template)
if __name__ == '__main__':
try:
main(sys.argv)
except error.Error as e:
sys.stderr.write(f'{e}\n')
sys.exit(1)
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