So that the daemon won’t die

Long running processes and PHP

Transcript

1. So that the daemon won’t die Long running processes and PHP Leszek Krupiński 4developers 2017
2. LEAFNODE
4. .pl /PHPersPL +grupy
5. Why What How
6. Why What How
7. Processing
8. • long running • queue workers • event-driven jobs • repeated tasks • services
9. Long-running processes in PHP?
11. MEMLEAKS SLOW NESS EASE PHP
12. Time change PHP change
13. Common codebase Common skills
14. Profiling
15. What
16. Controlled state Is it runinng Status Event log Restart
17. Low-entry solutions
18. Cron
19. Well…
20. Everything's on you
21. Is it starting? Does it do anything?
22. Logging Monitoring Locking
23. 1 minute resolution
24. On the other hand - PHP is meant to die
25. Queue
26. Can act as cron too!
27. Real daemons
28. 1. Keep working 2. Exit nicely 3. Restart if needed
29. "the loop"
35. Respond to signals
36. pcntl_signal() declare() / pcntl_signal_dispatch()
39. Running daemons
40. Fork
41. • redirect streams / close descriptors • fork • detach from console • respond to signals • close nicely
42. 1. Call umask(0) to prevent permission issues. 2. fork() and have the parent exit. 3. Call setsid(). 4. Setup signal processing of SIGHUP and SIGTERM. 5. fork() again and have the parent exit. 6. Change the current working dir with chdir(). 7. fclose() stdin, stdout and stderr and don't write to them. 8. Process!
44. nohup
46. init.d
47. 1.starts the process 2.drops into background 3.logs output
49. Upstart
50. /etc/init/foo.conf
51. /etc/init/foo.conf
52. systemd
54. supervisord
56. supervisorctl
57. web interface
58. Monitoring
60. memory_get_usage()
61. Log performance
62. statsd, influxdb, grafana
65. https://github.com/ samuelebistoletti/docker- statsd-influxdb-grafana
66. Data from OS: collectd
67. Log Events
68. Monolog ! syslog ! logstash ! graylog2 / kibana
70. Questions?
71. Thanks! @leafnode http://speakerdeck.com/leafnode/