Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Daemonize
Search
Sergey Arkhipov
May 20, 2017
Programming
0
280
Daemonize
A little tech talk for rannts#16 meetup on correct daemonization in UNIXes before systed era
Sergey Arkhipov
May 20, 2017
Tweet
Share
More Decks by Sergey Arkhipov
See All by Sergey Arkhipov
Fingerprinting
9seconds
0
140
Concurrency Models
9seconds
0
180
Probablistic Data Structures
9seconds
0
220
Own Mustache
9seconds
0
300
Stuff That Works
9seconds
0
290
Evidence
9seconds
0
78
Redneck Monads
9seconds
1
85
Latency
9seconds
0
98
Oh Blindfold Russia!
9seconds
0
260
Other Decks in Programming
See All in Programming
ナレッジイネイブリングにAIを活用してみる ゆるSRE勉強会 #9
nealle
0
170
SwiftUI Viewの責務分離
elmetal
PRO
2
280
CloudRun, Spanner に対する負荷試験の反省と オブザーバビリティによるアプローチ
oyasumipants
1
170
Expoによるアプリ開発の現在地とReact Server Componentsが切り開く未来
yukukotani
2
220
LINE messaging APIを使ってGoogleカレンダーと連携した予約ツールを作ってみた
takumakoike
0
130
Boost Your Web Performance with Hyperdrive
chimame
1
100
やっと腹落ち「スプリント毎に動くモノをリリースする」〜ゼロから始めるメガバンクグループのアジャイル実践〜
sasakendayo
0
160
Learning Kotlin with detekt
inouehi
1
200
未経験でSRE、はじめました! 組織を支える役割と軌跡
curekoshimizu
1
200
もう少しテストを書きたいんじゃ〜 #phpstudy
o0h
PRO
21
4.3k
変化の激しい時代における、こだわりのないエンジニアの強さ
satoshi256kbyte
0
120
Jakarta EE meets AI
ivargrimstad
0
660
Featured
See All Featured
How to Ace a Technical Interview
jacobian
276
23k
Writing Fast Ruby
sferik
628
61k
Code Reviewing Like a Champion
maltzj
521
39k
GitHub's CSS Performance
jonrohan
1030
460k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
21
2.5k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
29
1.1k
Intergalactic Javascript Robots from Outer Space
tanoku
270
27k
[RailsConf 2023] Rails as a piece of cake
palkan
53
5.3k
Large-scale JavaScript Application Architecture
addyosmani
511
110k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
28
9.3k
Fireside Chat
paigeccino
35
3.2k
Transcript
Правильная демонизация Сергей Архипов, 2017
Чего хотим #!/usr/bin/env python3 # -*- coding: utf-8 -*- import
contextlib import syslog import time @contextlib.contextmanager def daemonize(): yield if __name__ == "__main__": with daemonize(): syslog.openlog(facility=syslog.LOG_USER) syslog.syslog("Daemon start.") time.sleep(10) syslog.syslog("Daemon done.")
Подход 1 def daemonize(): first_pid = os.fork() if first_pid: sys.exit(0)
yield
Подход 2 def daemonize(): first_pid = os.fork() if first_pid: sys.exit(0)
syslog.syslog("Session={0}, Group={1}, Parent={2}, Self={3}".format( os.getsid(0), os.getpgid(0), os.getppid(), os.getpid() )) yield … Session=7087, Group=14115, Parent=14115, Self=14151 … Daemon start. … Daemon done.
Подход 2 def daemonize(): first_pid = os.fork() if first_pid: sys.exit(0)
syslog.syslog("Session={0}, Group={1}, Parent={2}, Self={3}".format( os.getsid(0), os.getpgid(0), os.getppid(), os.getpid() )) os.setsid() syslog.syslog("Session={0}, Group={1}, Parent={2}, Self={3}".format( os.getsid(0), os.getpgid(0), os.getppid(), os.getpid() )) yield … Session=7087, Group=17364, Parent=17364, Self=17400 … Session=17400, Group=17400, Parent=17364, Self=17400 … Daemon start … Daemon done.
Подход 3 def daemonize(): if os.fork(): sys.exit(0) os.setsid() if os.fork():
sys.exit(0) yield
Подход 4 def daemonize(): if os.fork(): sys.exit(0) os.setsid() if os.fork():
sys.exit(0) os.chdir("/") os.umask(0o002) yield
Подход 5 def daemonize(): if os.fork(): sys.exit(0) os.setsid() if os.fork():
sys.exit(0) os.chdir("/") os.umask(0o002) sys.stdout.flush() sys.stderr.flush() _, max_fds = resource.getrlimit(resource.RLIMIT_NOFILE) max_fds = max_fds if max_fds!=resource.RLIM_INFINITY else 1024 os.closerange(0, max_fds) sys.stdout = sys.stderr = open(os.devnull, "w") sys.stdin = open(os.devnull, "r") yield
Подход 6 def daemonize(): if os.getppid() != 1: return if
os.fork(): sys.exit(0) os.setsid() if os.fork(): sys.exit(0) os.chdir("/") os.umask(0o002) sys.stdout.flush() sys.stderr.flush() _, max_fds = resource.getrlimit(resource.RLIMIT_NOFILE) max_fds = max_fds if max_fds != resource.RLIM_INFINITY else 1024 os.closerange(0, max_fds) sys.stdout = sys.stderr = open(os.devnull, "w") sys.stdin = open(os.devnull, "r") yield
def daemonize(): if os.getppid() != 1: return if os.fork(): sys.exit(0)
os.setsid() if os.fork(): sys.exit(0) os.chdir("/") os.umask(0o002) sys.stdout.flush() sys.stderr.flush() _, max_fds = resource.getrlimit(resource.RLIMIT_NOFILE) max_fds = max_fds if max_fds != resource.RLIM_INFINITY else 1024 os.closerange(0, max_fds) sys.stdout = sys.stderr = open(os.devnull, "w") sys.stdin = open(os.devnull, "r") yield