def start(self):
# each entry is tuple of ns_ipdb, out_ifc, in_ifc
host_info = []
for i in range(0, num_hosts):
print("Launching host %i of %i" % (i + 1, num_hosts))
ipaddr = "172.16.1.%d/24" % (100 + i)
host_info.append(
self._create_ns("host%d" % i, ipaddr=ipaddr,
disable_ipv6=True))
if multicast:
cmd = ["python", "tunnel.py", str(i)]
else:
cmd = [
"python", "tunnel_mesh.py",
str(num_hosts),
str(i),
str(dhcp)
]
p = NSPopen(host_info[i][0].nl.netns, cmd, stdin=PIPE)
self.processes.append(p)
with self.ipdb.create(ifname="br-fabric", kind="bridge") as br:
for host in host_info:
br.add_port(host[1])
br.up()
# get host0 bridge ip's
host0_br_ips = []
if dhcp == 1:
print("Waiting for host0 br1/br2 ip addresses available")
for j in range(0, 2):
retry = -1
ip_out = None
while retry < 0:
check = Popen([
"ip", "netns", "exec", "host0", "ip", "addr", "show",
"br%d" % j
],
stdout=PIPE,
stderr=PIPE)
ip_out = check.stdout.read()
checkip = "99.1.%d" % j
retry = ip_out.find(checkip)
p = re.compile(("99.1.%d." % j) + "\d+")
host0_br_ips.append(p.findall(ip_out)[0])
else:
host0_br_ips.append("99.1.0.1")
host0_br_ips.append("99.1.1.1")
# traffic test
print("Validating connectivity")
for i in range(1, num_hosts):
for j in range(0, 2):
retry = -1
while retry < 0:
check = Popen([
"ip", "netns", "exec",
"host%d" % i, "ip", "addr", "show",
"br%d" % j
],
stdout=PIPE,
stderr=PIPE)
out = check.stdout.read()
checkip = "99.1.%d" % j
retry = out.find(checkip)
print("VNI%d between host0 and host%d" % (10000 + j, i))
call([
"ip", "netns", "exec",
"host%d" % i, "ping", host0_br_ips[j], "-c", "3", "-i",
"0.2", "-q"
])
