Most Powerful High Availability / Load Balancing #yapcasia 2012

Transcript

1. Most Powerful High Availability Load Balancing Sep, 29, 2012 YAPC::Asia

   2012 @riywo

2. @riywo

3. http://www.publicdomainpictures.net/view-image.php?image=4314&picture=t-shirt-image

4. None
5. None

6. Talk about.... * Why is this good? * Why is

   this bad?

7. HALB

8. What?

9. LB Server Server Server Server

10. HA Server Server Server Server ✗ Health Check

11. Same!

12. Where?

13. HA LB Web Web Web Web User

14. HA LB DB DB DB DB Web

15. HA LB API API API API Web

16. Anywhere!

17. How?

18. BIG-IP ServerIron

19. LVS

20. HAProxy

21. mod_proxy

22. nginx

23. ELB

24. MyDNS

25. Pros/Cons

26. Pros Cons H/W Inline (DSR) Powerful Difficult Expensive Proxy Inline

    (DSR) Easy to use Performance DNS No proxy Performance Difficult

27. Pros Cons H/W Inline (DSR) Powerful Difficult Expensive Proxy Inline

    (DSR) Easy to use Performance DNS No proxy Performance Difficult

28. DNS

29. No Proxy

30. DNS DB DB DB DB Web 1 2 Weighted-DNS RoundRobin

    HA LB

31. Cache

32. DNS DB DB DB DB Web 2 Cache 1 3

33. Cache is Difficult

34. DNS DB DB DB DB Web Cache ✗ Health Check

35. DNS DB DB DB DB Web Cache ✗ Health Check

    Inconsistent

36. Solution

37. Client DNS

38. DNS DB DB DB DB Web ✗ Health Check

39. Too many Health Check

40. DB DB DB DB DNS Web ✗ Health Check DNS

    Web DNS Web Health CheckHealth Check

41. Solution

42. Eventual Consistent

43. DB DB DB DB DNS Web ✗ DNS Web DNS

    Web Health Check DNS 2 Async 1

44. How?

45. DB DB DB DB ✗ MyDNS Web Health Check MyDNS

    1 2 Replication MyDNS Web MyDNS Web

46. Good Points

47. * Clients know all info * Eventual Consistent * Any

    Application:)

48. Bad Points

49. * Too much... * Async difficult

50. Join us! * Perl Mongers * Operation Engineers

51. Join us! * Perl Mongers * Operation Engineers * Baseball

    Players :)

52. Thanks!

53. @riywo blog.riywo.com weblog.riywo.com