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sebak-monitor.py
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sebak-monitor.py
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import sys
from time import sleep
import requests
from multiprocessing import Pool
import logging
from datetime import datetime
from datetime import timedelta
import json
import configparser
from _email import sendmail
config = None
email_to_addresses = None
class InvalidBehavior(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return self.value
def get_block_obj(url):
try:
obj = requests.get(url).json()
obj['url'] = url
except requests.exceptions.RequestException:
raise
return obj
def get_latest_block_height(url):
try:
obj = requests.get(url).json()
except requests.exceptions.RequestException:
raise
return obj['block']['height'], obj
def get_valid_urls(urls):
valid_urls = []
for url in urls:
try:
r = requests.get(url)
except requests.exceptions.RequestException:
continue
if r.status_code == 200:
try:
if r.json()['node']['state'] == 'CONSENSUS':
valid_urls.append(url)
except KeyError:
continue
return valid_urls
def check_have_same_blocks(blocks):
height = blocks[0]['height']
hash = blocks[0]['hash']
for block in blocks:
if block['hash'] != hash:
form = 'At height {}, the block hashes of the two nodes are different\n\n{}\n{}\n\n{}\n{}\n'
text = form.format(
height,
block['url'],
json.dumps(block, indent=4, sort_keys=True),
blocks[0]['url'],
json.dumps(blocks[0], indent=4, sort_keys=True),
)
raise InvalidBehavior(text)
return ''
log = logging.getLogger("monitor")
log.addHandler(logging.StreamHandler())
log.setLevel(logging.DEBUG)
def get_time(url):
try:
block = requests.get(url).json()
except requests.exceptions.RequestException:
raise
confirmed_time = block['confirmed']
return datetime.strptime(confirmed_time.split('.')[0], '%Y-%m-%dT%H:%M:%S')
def get_expected_date_time(first_block_time, latest_height):
expected_seconds_by_block_time = ((latest_height - 2) * 5)
return first_block_time + timedelta(seconds=expected_seconds_by_block_time)
def get_time_diff(get_block_url, first_consensused_block_height, latest_height):
try:
first_block_time = get_time(get_block_url % first_consensused_block_height)
except requests.exceptions.RequestException:
raise
try:
latest_block_time = get_time(get_block_url % latest_height)
except requests.exceptions.RequestException:
raise
expected = get_expected_date_time(first_block_time, latest_height)
actual = latest_block_time
return actual - expected
def parse_conf(ini_file):
config = configparser.ConfigParser()
config.read(ini_file)
return config
def run(urls, prev_latest_height, block_confirm_wait):
try:
valid_urls = get_valid_urls(urls)
except requests.exceptions.RequestException as e:
raise
if len(valid_urls) < 1:
raise InvalidBehavior('There is no valid url.')
try:
latest_height, node = get_latest_block_height(valid_urls[0])
except requests.exceptions.RequestException as e:
raise
if prev_latest_height == latest_height:
raise InvalidBehavior('The latest_height has not changed for {} seconds.'.format(
checking_block_interval,
))
n = len(valid_urls)
if n < 1:
raise InvalidBehavior('There are zero valid urls.')
if latest_height < 1:
raise InvalidBehavior('The latest_height {} is invalid'.format(latest_height))
sleep(block_confirm_wait)
get_block_urls = []
for url in valid_urls:
get_block_urls.append(url + '/api/v1/blocks/' + str(latest_height))
try:
with Pool(n) as p:
blocks = p.map(get_block_obj, get_block_urls)
except requests.exceptions.RequestException:
raise
except json.decoder.JSONDecodeError:
raise
try:
check_have_same_blocks(blocks)
except InvalidBehavior:
raise
ret = {}
ret['n'] = n
ret['valid-urls'] = valid_urls
ret['latest-height'] = latest_height
ret['blocks'] = blocks
ret['node'] = node
return ret
def slack_out(url, prefix, *strs):
if len(url) < 1:
return
text = ''
for s in strs:
text += s + '\n\n'
log.debug('send slack')
try:
time_str = datetime.now().strftime('[%m-%d|%H:%M:%S]')
requests.post(url, json={"text": '{} {} {}'.format(prefix, time_str, text)})
except requests.exceptions.RequestException as e:
log.error(e)
pass
def email_out(*strs):
log.debug('send email')
body_str = ''
for s in strs:
body_str += s + '\n\n'
ret = sendmail(
smtp_config=config['smtp'],
from_addr=config['smtp']['from_address'],
to_addr=email_to_addresses,
subject='SEBAK: Invalid benavior found',
body=body_str,
)
return ret
def file_to_string(path):
log.debug('file_to_string')
with open(path, 'r') as f:
data=f.read()
return data
logging.basicConfig()
log = logging.getLogger('main')
log.setLevel(logging.DEBUG)
if __name__ == '__main__':
log.info('start sebak-monitor')
if len(sys.argv) < 2:
log.fatal('The number of argument should be 1(ini file for configuration)')
exit(1)
ini_file = sys.argv[1]
config = parse_conf(ini_file)
checking_block_interval = int(config['INTERVAL']['CheckingBlock'])
block_confirm_wait = int(config['INTERVAL']['BlockConfirmWait'])
alarm_interval = int(config['INTERVAL']['Alarm'])
slack_url_info=config['URL']['SlackWebhookInfo']
slack_url_error=config['URL']['SlackWebhookError']
postfix_file_path=config['FILES']['postfix']
email_to_addresses = list(map(lambda x: x.strip(), config['mail']['to_address'].split(',')))
urls = list(map(lambda x: x.strip(), config['NODES']['nodes'].split(',')))
log.debug('urls: %s', urls)
prev_latest_height = 0
alarm_time = datetime.now() - timedelta(days=1) # init to yesterday for alarming at first immediately
while True:
try:
ret = run(urls, prev_latest_height, block_confirm_wait)
except requests.exceptions.RequestException as e:
log.exception(e)
continue
except json.decoder.JSONDecodeError as e:
log.exception(e)
continue
except InvalidBehavior as e:
email_out(str(e), file_to_string(postfix_file_path))
slack_out(slack_url_error, '<!channel> ERROR', str(e), file_to_string(postfix_file_path))
break
prev_latest_height = ret['latest-height']
first_consensused_block_height = 2
time_diff = get_time_diff(
ret['valid-urls'][0] + '/api/v1/blocks/%d',
first_consensused_block_height,
ret['latest-height'],
)
n = ret['n']
height = ret['blocks'][0]['height']
user_txs = ret['node']['block']['total-txs'] - height
user_ops = ret['node']['block']['total-ops'] - (height * 2)
alarm_time_diff = datetime.now() - alarm_time
if alarm_time_diff > timedelta(minutes=alarm_interval):
text = 'Nodes: {}, Height: {}, UserTxs: {}, UserOps: {}, TimeDiff: {}'.format(
n, height, user_txs, user_ops, time_diff,
)
slack_out(slack_url_info, 'INFO', text)
alarm_time = datetime.now()
sleep(checking_block_interval - block_confirm_wait)