Overhaul to a considerably more useful multiprocess state
This commit is contained in:
parent
a4cd4568cf
commit
a0766fc42e
7 changed files with 222 additions and 166 deletions
|
|
@ -7,5 +7,8 @@ zapp_binary(
|
|||
main = "src/python/aloe/__main__.py",
|
||||
deps = [
|
||||
":lib",
|
||||
py_requirement("graphviz"),
|
||||
py_requirement("icmplib"),
|
||||
py_requirement("requests"),
|
||||
],
|
||||
)
|
||||
|
|
|
|||
|
|
@ -6,15 +6,19 @@ when packet delivery latencies radically degrade and maintain a report file.
|
|||
|
||||
"""
|
||||
|
||||
import sys
|
||||
import argparse
|
||||
import logging
|
||||
from collections import defaultdict, deque
|
||||
from datetime import datetime, timedelta
|
||||
from ping import ping
|
||||
from traceroute import TraceElem, traceroute
|
||||
from subprocess import CalledProcessError
|
||||
from typing import NamedTuple
|
||||
from collections import defaultdict
|
||||
import logging
|
||||
from multiprocessing import Process, Queue
|
||||
import queue
|
||||
import sys
|
||||
from typing import List
|
||||
|
||||
from .lib import *
|
||||
|
||||
import graphviz
|
||||
import requests
|
||||
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
|
@ -35,103 +39,156 @@ def distinct(iter):
|
|||
return l
|
||||
|
||||
|
||||
class Host(NamedTuple):
|
||||
hostname: str
|
||||
ip: str
|
||||
rank: int
|
||||
latency: timedelta
|
||||
samples: int = 1
|
||||
|
||||
def mean_latency(self):
|
||||
return self.latency / self.samples
|
||||
|
||||
|
||||
class Topology(object):
|
||||
LOCALHOST = Host("localhost", "127.0.0.1", 0, timedelta(seconds=0.1))
|
||||
LOCALHOST = Hop("127.0.0.1", 1, [0.0], 0)
|
||||
|
||||
def __init__(self):
|
||||
self._graph = defaultdict(set) # Dict[ip, List[ip]]
|
||||
self._nodes = {self.LOCALHOST.ip: self.LOCALHOST} # Dict[ip, Host]
|
||||
self._graph = defaultdict(set) # Dict[address, List[address]]
|
||||
self._nodes = {self.LOCALHOST.address: self.LOCALHOST} # Dict[address, Host]
|
||||
|
||||
def next_hops(self, address: str) -> List[str]:
|
||||
return list(self._graph.get(address))
|
||||
|
||||
def node(self, address: str) -> Hop:
|
||||
return self._nodes.get(address)
|
||||
|
||||
def add_traceroute(self, trace):
|
||||
trace = list(trace)
|
||||
hosts = []
|
||||
newhosts = [self.LOCALHOST.ip]
|
||||
rank = 0
|
||||
for e in trace:
|
||||
if e.ip not in self._nodes:
|
||||
self._nodes[e.ip] = Host(e.hostname, e.ip, e.rank, e.latency, 1)
|
||||
if e.address not in self._nodes:
|
||||
self._nodes[e.address] = e
|
||||
else:
|
||||
self._nodes[e.ip] = Host(e.hostname, e.ip, e.rank, e.latency + self._nodes[e.ip].latency, self._nodes[e.ip].samples + 1)
|
||||
e0 = self._nodes[e.address]
|
||||
e0._packets_sent += e._packets_sent
|
||||
e0._rtts.extend(e.rtts)
|
||||
e0._distance = max(e.distance, e0.distance)
|
||||
|
||||
if e.rank > rank:
|
||||
if newhosts:
|
||||
for h2 in newhosts:
|
||||
for h1 in hosts:
|
||||
self._graph[h1].add(h2)
|
||||
hosts = newhosts
|
||||
newhosts = []
|
||||
rank = e.rank
|
||||
hosts = [(self.LOCALHOST.address, self.LOCALHOST.distance)] + [(e.address, e.distance) for e in trace]
|
||||
i1 = iter(hosts)
|
||||
i2 = iter(hosts)
|
||||
next(i2)
|
||||
|
||||
if e.rank == rank:
|
||||
newhosts.append(e.ip)
|
||||
for (parent, _), (child, _) in zip(i1, i2):
|
||||
self._graph[parent].add(child)
|
||||
|
||||
def render(self):
|
||||
for n in sorted(self._nodes.values(), key=lambda n: n.rank):
|
||||
print(f"{n.hostname} ({n.ip}) => {self._graph[n.ip]}")
|
||||
g = graphviz.Digraph()
|
||||
for n in sorted(self._nodes.values(), key=lambda n: n.distance):
|
||||
g.node(n.address)
|
||||
for next in self._graph[n.address]:
|
||||
g.edge(n.address, next)
|
||||
|
||||
# Lol. Lmao.
|
||||
return requests.post("https://dot-to-ascii.ggerganov.com/dot-to-ascii.php", params={"boxart":1, "src": g.source}).text
|
||||
# return g.source
|
||||
|
||||
def compute_topology(hostlist):
|
||||
def __iter__(self):
|
||||
return iter(sorted(self._nodes.values(), key=lambda n: n.distance))
|
||||
|
||||
def __delitem__(self, key):
|
||||
del self._graph[key]
|
||||
del self._nodes[key]
|
||||
|
||||
def compute_topology(hostlist, topology=None):
|
||||
"""Walk a series of traceroute tuples, computing a 'worst expected latency' topology from them."""
|
||||
|
||||
topology = Topology()
|
||||
topology = topology or Topology()
|
||||
for h in hostlist:
|
||||
topology.add_traceroute(traceroute(h))
|
||||
trace = traceroute(h)
|
||||
# Restrict the trace to hosts which ICMP ping
|
||||
trace = [e for e in trace if ping(e.address, count=1).is_alive]
|
||||
topology.add_traceroute(trace)
|
||||
|
||||
return sorted(topology._nodes.values(), key=lambda n: n.rank)
|
||||
return topology
|
||||
|
||||
|
||||
def cycle(iter):
|
||||
while True:
|
||||
for e in iter:
|
||||
yield e
|
||||
|
||||
|
||||
def pinger(host, id, queue):
|
||||
# Mokney patch the RTT tracking
|
||||
host._rtts = deque(host._rtts, maxlen=100)
|
||||
while True:
|
||||
timeout = h.avg_rtt * 2 / 1000.0 # rtt is in ms but timeout is in sec.
|
||||
start = datetime.now()
|
||||
res = ping(host.address, id=id, timeout=timeout, count=3)
|
||||
queue.put((start, res))
|
||||
if res.is_alive:
|
||||
host._rtts.extend(res._rtts)
|
||||
host._packets_sent += res._packets_sent
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
logging.basicConfig(level=logging.INFO)
|
||||
logging.basicConfig(level=logging.DEBUG)
|
||||
opts, args = parser.parse_known_args()
|
||||
|
||||
now = start = datetime.now()
|
||||
reconfigure_delay = timedelta(minutes=5)
|
||||
configure_at = now - reconfigure_delay
|
||||
flush_delay = timedelta(seconds=5)
|
||||
flush_at = now + flush_delay
|
||||
|
||||
topology = []
|
||||
recovered_duration = timedelta(seconds=5)
|
||||
dead_duration = timedelta(seconds=30)
|
||||
|
||||
topology = None
|
||||
id = unique_identifier()
|
||||
|
||||
q = Queue()
|
||||
workers = {}
|
||||
last_seen = {}
|
||||
|
||||
spinner = cycle("|/-\\")
|
||||
|
||||
with open("incidents.txt", "a") as fp:
|
||||
while True:
|
||||
now = datetime.now()
|
||||
|
||||
if flush_at <= now:
|
||||
fp.flush()
|
||||
flush_at = now + flush_delay
|
||||
|
||||
if configure_at <= now:
|
||||
log.info("Attempting to reconfigure network topology...")
|
||||
try:
|
||||
topology = compute_topology(opts.hosts)
|
||||
configure_at = now + reconfigure_delay
|
||||
for h in topology:
|
||||
log.info(f"in topology {h}")
|
||||
except CalledProcessError:
|
||||
topology = compute_topology(opts.hosts, topology)
|
||||
configure_at = now + reconfigure_delay
|
||||
log.info("Graph -\n" + topology.render())
|
||||
|
||||
for h in topology:
|
||||
if h.distance < 1 or h.distance > 6:
|
||||
continue
|
||||
|
||||
if h.address in workers:
|
||||
continue
|
||||
|
||||
else:
|
||||
p = workers[h.address] = Process(target=pinger, args=(h, id, q))
|
||||
p.start()
|
||||
|
||||
try:
|
||||
timestamp, res = q.get(timeout=0.1)
|
||||
last = last_seen.get(res.address)
|
||||
|
||||
if res.address not in workers:
|
||||
pass
|
||||
|
||||
for h in topology:
|
||||
if h.rank == 0:
|
||||
continue
|
||||
elif res.is_alive:
|
||||
if last and (delta := timestamp - last) > recovered_duration:
|
||||
fp.write(f"RECOVERED\t{res.address}\t{timestamp.isoformat()}\t{delta.total_seconds()}\n")
|
||||
last_seen[res.address] = timestamp
|
||||
|
||||
fail = False
|
||||
try:
|
||||
if ping(h.ip, timeout=h.mean_latency() * 2) != 0:
|
||||
fail = True
|
||||
except Exception as e:
|
||||
fail = True
|
||||
log.exception(e)
|
||||
elif not res.is_alive:
|
||||
if last and (delta := timestamp - last) > dead_duration:
|
||||
workers[h.address].terminate()
|
||||
del workers[h.address]
|
||||
del topology[h.address]
|
||||
fp.write(f"DEAD\t{res.address}\t{timestamp.isoformat()}\t{delta.total_seconds()}\n")
|
||||
|
||||
if fail:
|
||||
msg = f"{datetime.now()} failed to reach {h.hostname} ({h.ip})"
|
||||
log.warning(msg)
|
||||
fp.write(msg + "\n")
|
||||
else:
|
||||
fp.write(f"DOWN\t{res.address}\t{timestamp.isoformat()}\n")
|
||||
|
||||
else:
|
||||
sys.stderr.write('.')
|
||||
sys.stderr.flush()
|
||||
except queue.Empty:
|
||||
sys.stderr.write("\r" + next(spinner))
|
||||
sys.stderr.flush()
|
||||
|
|
|
|||
91
projects/aloe/src/python/aloe/lib.py
Normal file
91
projects/aloe/src/python/aloe/lib.py
Normal file
|
|
@ -0,0 +1,91 @@
|
|||
#!/usr/bin/env python3
|
||||
|
||||
import logging
|
||||
from time import sleep
|
||||
|
||||
from icmplib import Hop
|
||||
from icmplib.exceptions import (
|
||||
ICMPLibError,
|
||||
TimeExceeded,
|
||||
)
|
||||
from icmplib.models import Hop, ICMPRequest
|
||||
from icmplib.sockets import (
|
||||
ICMPv4Socket,
|
||||
ICMPv6Socket,
|
||||
)
|
||||
from icmplib.utils import *
|
||||
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
def urping(address: str, hops: int, via: str, family=None, count=3, fudge=4, interval=0.05, timeout=2, source=None, **kwargs) -> Hop:
|
||||
"""Ur-ping by (ab)using ICMP TTLs.
|
||||
|
||||
Craft an ICMP message which would go one (or more) hops FARTHER than the `address` host, routed towards `via`.
|
||||
Send `count * fudge` packets, looking for responses from `address`.
|
||||
Responses from `address` are considered; and a `Hop` is built from those results.
|
||||
Other responses from other hosts are discarded.
|
||||
|
||||
"""
|
||||
|
||||
if is_hostname(via):
|
||||
via = resolve(via, family)[0]
|
||||
|
||||
if is_hostname(address):
|
||||
address = resolve(address, falmiy)[0]
|
||||
|
||||
if is_ipv6_address(via):
|
||||
_Socket = ICMPv6Socket
|
||||
else:
|
||||
_Socket = ICMPv4Socket
|
||||
|
||||
ttl = hops
|
||||
hop = Hop(address, 0, [])
|
||||
packets_sent = 0
|
||||
|
||||
with _Socket(source) as sock:
|
||||
for _ in range(count * fudge):
|
||||
request = ICMPRequest(
|
||||
destination=via,
|
||||
# Note that we act like this is a new stream with a new ID and sequence each time to try and fool multipathing.
|
||||
id=unique_identifier(),
|
||||
sequence=0,
|
||||
ttl=ttl,
|
||||
**kwargs)
|
||||
|
||||
try:
|
||||
sock.send(request)
|
||||
packets_sent += 1
|
||||
|
||||
reply = None
|
||||
reply = sock.receive(request, timeout)
|
||||
rtt = (reply.time - request.time) * 1000
|
||||
|
||||
reply.raise_for_status()
|
||||
|
||||
except TimeExceeded:
|
||||
sleep(interval)
|
||||
|
||||
except ICMPLibError as e:
|
||||
log.exception(e)
|
||||
break
|
||||
|
||||
if not reply:
|
||||
log.debug(f"got no reply from {address}")
|
||||
else:
|
||||
# Because the default repr() is crap
|
||||
reply_str = "ICMPReply({})".format(", ".join(slot + "=" + str(getattr(reply, slot)) for slot in reply.__slots__))
|
||||
log.debug(f"Pinging {address} (distance {hops}) via {via} got reply {reply_str}")
|
||||
|
||||
if reply and reply.source != address:
|
||||
continue
|
||||
|
||||
elif reply:
|
||||
hop._packets_sent += 1
|
||||
hop._rtts.append(rtt)
|
||||
|
||||
if hop and hop._packets_sent >= count:
|
||||
break
|
||||
|
||||
return hop
|
||||
|
|
@ -1,18 +0,0 @@
|
|||
"""A shitty ping wrapper."""
|
||||
|
||||
|
||||
from datetime import timedelta
|
||||
from subprocess import check_call, DEVNULL
|
||||
|
||||
|
||||
def ping(host: str,
|
||||
count: int = 3,
|
||||
interval: float = 0.3,
|
||||
timeout: timedelta = timedelta(seconds=3)):
|
||||
return check_call(["ping", "-q",
|
||||
"-i", str(interval),
|
||||
"-c", str(count),
|
||||
"-W", str(timeout.total_seconds()),
|
||||
host],
|
||||
stdout=DEVNULL,
|
||||
stderr=DEVNULL,)
|
||||
|
|
@ -1,48 +0,0 @@
|
|||
"""A shitty traceroute wrapper."""
|
||||
|
||||
from datetime import timedelta
|
||||
import re
|
||||
from subprocess import (
|
||||
CalledProcessError,
|
||||
check_call,
|
||||
check_output,
|
||||
DEVNULL,
|
||||
)
|
||||
from typing import Iterator, List, NamedTuple
|
||||
|
||||
|
||||
class TraceElem(NamedTuple):
|
||||
hostname: str
|
||||
ip: str
|
||||
latency: timedelta
|
||||
rank: int
|
||||
|
||||
|
||||
_LINE = re.compile(r"\*|(((?P<hostname>[-_\w\d\.]*)\s+\((?P<ip>[a-f\d\.:]*)\)\s+)?(?P<latency>[\d\.]*) ms)")
|
||||
|
||||
|
||||
def _parse_traceroute(lines: List[str]) -> Iterator[TraceElem]:
|
||||
for rank, l in zip(range(1, 1<<64), lines):
|
||||
ip = None
|
||||
hostname = None
|
||||
for m in re.finditer(_LINE, l):
|
||||
if m.group("latency"):
|
||||
ip = m.group("ip") or ip
|
||||
hostname = m.group("hostname") or hostname
|
||||
yield TraceElem(hostname, ip, timedelta(milliseconds=float(m.group("latency"))), rank)
|
||||
|
||||
|
||||
def traceroute(host: str, icmp=True, timeout=timedelta(seconds=5)) -> Iterator[TraceElem]:
|
||||
# FIXME: Make ICMP mode an option, not on always
|
||||
yield from _parse_traceroute(
|
||||
check_output(["traceroute",
|
||||
# Set wait; note use of total_seconds which is "real" valued.
|
||||
"-w", str(timeout.total_seconds()),
|
||||
# Use ICMP probes same as PING.
|
||||
# This means all probed hosts will be pingable/ping compliant.
|
||||
# May miss parts of the topology as a result.
|
||||
"-I",
|
||||
host],
|
||||
stderr=DEVNULL,)
|
||||
.decode("utf-8")
|
||||
.splitlines())
|
||||
|
|
@ -1,31 +0,0 @@
|
|||
#!/usr/bin/env python3
|
||||
|
||||
from typing import List
|
||||
from traceroute import _parse_traceroute, TraceElem
|
||||
from datetime import timedelta
|
||||
|
||||
import pytest
|
||||
|
||||
|
||||
def parse_traceroute(lines):
|
||||
"""Testing helper."""
|
||||
return list(_parse_traceroute(lines))
|
||||
|
||||
|
||||
@pytest.mark.parametrize("example, expected", [
|
||||
# Basic case, one match
|
||||
("3 10.60.142.2 (10.60.142.2) 117.502 ms",
|
||||
[TraceElem("10.60.142.2", "10.60.142.2", timedelta(milliseconds=117.502))]),
|
||||
# Multiple matches on one line
|
||||
("3 10.60.142.2 (10.60.142.2) 117.502 ms 10.60.142.3 (10.60.142.3) 75.624 ms 10.60.142.2 (10.60.142.2) 117.709 ms",
|
||||
[TraceElem("10.60.142.2", "10.60.142.2", timedelta(milliseconds=117.502)),
|
||||
TraceElem("10.60.142.3", "10.60.142.3", timedelta(milliseconds=75.624)),
|
||||
TraceElem("10.60.142.2", "10.60.142.2", timedelta(milliseconds=117.709))]),
|
||||
# Context sensitive case - traceroute doesn't always print the host & IP.
|
||||
("7 ae-501-ar01.denver.co.denver.comcast.net (96.216.22.130) 41.920 ms 41.893 ms 74.385 ms",
|
||||
[TraceElem("ae-501-ar01.denver.co.denver.comcast.net", "96.216.22.130", timedelta(milliseconds=41.920)),
|
||||
TraceElem("ae-501-ar01.denver.co.denver.comcast.net", "96.216.22.130", timedelta(milliseconds=41.893)),
|
||||
TraceElem("ae-501-ar01.denver.co.denver.comcast.net", "96.216.22.130", timedelta(milliseconds=74.385))]),
|
||||
])
|
||||
def test_examples(example: str, expected: List[TraceElem]):
|
||||
assert parse_traceroute(example.splitlines()) == expected
|
||||
|
|
@ -16,7 +16,9 @@ docutils==0.17
|
|||
ExifRead==2.3.2
|
||||
flake8==3.9.2
|
||||
Flask==2.0.1
|
||||
graphviz==0.18.2
|
||||
hypothesis==6.14.5
|
||||
icmplib==3.0.2
|
||||
idna==2.10
|
||||
imagesize==1.2.0
|
||||
importlib-metadata==4.0.1
|
||||
|
|
|
|||
Loading…
Reference in a new issue