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skynet-webportal/setup-scripts/log-checker.py

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#!/usr/bin/env python3
import discord, sys, traceback, io, os, asyncio, re
from bot_utils import setup, send_msg
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from datetime import datetime, timedelta
from subprocess import Popen, PIPE
"""
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log-checker checks the docker logs for siad.
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Arguments:
1. path to a .env file (default is none so env variables can already be
preset)
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2. docker container name name (default: "sia")
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3. number of hours to look back in log (default: 1 hour)
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"""
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# The default check interval in hours.
DEFAULT_CHECK_INTERVAL = 1
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bot_token = setup()
client = discord.Client()
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# exit_after kills the script if it hasn't exited on its own after `delay` seconds
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async def exit_after(delay):
await asyncio.sleep(delay)
exit(0)
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@client.event
async def on_ready():
await run_checks()
asyncio.create_task(exit_after(30))
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await client.close()
async def run_checks():
print("Running Skynet portal log checks")
try:
await check_load_average()
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await check_docker_logs()
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except: # catch all exceptions
trace = traceback.format_exc()
await send_msg(client, "```\n{}\n```".format(trace), force_notify=False)
# check_load_average monitors the system's load average value and issues a
# warning message if it exceeds 10.
async def check_load_average():
uptime_string = os.popen("uptime").read().strip()
# pattern = ""
if sys.platform == "Darwin":
pattern = "^.*load averages: \d*\.\d* \d*\.\d* (\d*\.\d*)$"
else:
pattern = "^.*load average: \d*\.\d*, \d*\.\d*, (\d*\.\d*)$"
load_av = re.match(pattern, uptime_string).group(1)
if float(load_av) > 10:
await send_msg(client, "High system load detected: `uptime: {}`".format(uptime_string), force_notify=True)
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# check_docker_logs checks the docker logs by filtering on the docker image name
async def check_docker_logs():
print("\nChecking docker logs...")
# Get the container name as an argument or use "sia" as default.
container_name = "sia"
if len(sys.argv) > 2:
container_name = sys.argv[2]
# Get the container id for siad.
cmd = 'docker ps -q --filter name=^{}$'.format(container_name)
print("[DEBUG] will run `{}`".format(cmd))
stream = os.popen(cmd)
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image_id = stream.read().strip()
# Get the number of hours to look back in the logs or use 1 as default.
check_hours = DEFAULT_CHECK_INTERVAL
if len(sys.argv) > 3:
check_hours = int(sys.argv[3])
now = datetime.now()
time = now - timedelta(hours=check_hours)
time_string = "{}h".format(check_hours)
# Read the logs.
print("[DEBUG] Will run `docker logs --since {} {}`".format(time_string, image_id))
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proc = Popen(["docker", "logs", "--since", time_string, image_id], stdin=PIPE, stdout=PIPE, stderr=PIPE, text=True)
std_out, std_err = proc.communicate()
if len(std_err) > 0:
# Trim the error log to under 1MB.
one_mb = 1024*1024
if len(std_err) > one_mb:
pos = std_err.find("\n", -one_mb)
std_err = std_err[pos+1:]
upload_name = "{}-{}-{}-{}-{}:{}:{}_err.log".format(container_name, time.year, time.month, time.day, time.hour, time.minute, time.second)
await send_msg(client, "Error(s) found in log!", file=discord.File(io.BytesIO(std_err.encode()), filename=upload_name), force_notify=True)
# Send at most 1900 characters of logs, rounded down to the nearest new line.
# This is a limitation in the size of Discord messages - they can be at most
# 2000 characters long (and we send some extra characters before the error log).
if len(std_err) > 1900:
pos = std_err.find("\n", -1900)
std_err = std_err[pos+1:]
await send_msg(client, "Error(s) preview:\n{}".format(std_err), force_notify=True)
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return
# If there are any critical errors. upload the whole log file.
if "Critical" in std_out or "panic" in std_out:
upload_name = "{}-{}-{}-{}-{}:{}:{}.log".format(container_name, time.year, time.month, time.day, time.hour, time.minute, time.second)
await send_msg(client, "Critical error found in log!", file=discord.File(io.BytesIO(std_out.encode()), filename=upload_name), force_notify=True)
return
# No critical errors, return a heartbeat type message
pretty_before = time.strftime("%I:%M%p")
pretty_now = now.strftime("%I:%M%p")
await send_msg(client, "No critical warnings in log from `{}` to `{}`".format(pretty_before, pretty_now))
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client.run(bot_token)