Nginx Proxy Load Balancer--according to the access directory and according to the different Apache

first of all, according to the directory accessed to distinguish the back end of W eb:

My requirement: When the requested directory is/aaa/sends the request to machine A, when the requested directory is/bbb/sends the request to machine B, except the directory/aaa/and the directory/bbb/, the other request sends to machine B

The contents of my configuration file are:

2. Upstream aaa.com
   

4. {
   

6. Server 192.168.111.6;
   

8. }
   

10. 
    

12. Upstream bbb.com
    

14. {
    

16. Server 192.168.111.20;
    

18. }
    

20. 
    

22. server {
    

24. Listen 80;
    

26. server_name li.com;
    

28. location/aaa/
    

30. {
    

32. Proxy_pass http://aaa.com/aaa/;
    

34. Proxy_set_header Host $host;
    

36. Proxy_set_header X-real-ip $remote _addr;
    

38. Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
    

40. 
    

42. }
    

44. 
    

46. location/bbb/
    

48. {
    

50. Proxy_pass http://bbb.com/bbb/;
    

52. Proxy_set_header Host $host;
    

54. Proxy_set_header X-real-ip $remote _addr;
    

56. Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
    

58. 
    

60. }
    

62. Location/
    

64. {
    

66. Proxy_pass http://bbb.com/;
    

68. Proxy_set_header Host $host;
    

70. Proxy_set_header X-real-ip $remote _addr;
    

72. Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
    

74. 
    

76. }
    

78. 
    

80. }
    

82. 
    

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Description:
more than 1 of the aaa.com and bbb.com in the configuration file are custom and write-free.
2 The server in upstream can write multiple, for example

Upstream aaa.com
{
server 192.168.111.6;
server 192.168.111.4;
server 192.168.111.5;
}

3 Proxy_passhttp://aaa.com/aaa/You must add this directory here, or you will have access to the root directory.
4 Actually, in the above configuration file, the localtion/bbb/part can be omitted, because the back location/already contains the/bbb/, so even if we do not define localtion/bbb/will also access to bbb.com.

Nginx proxies for the requested URI:

Scene: 1 nginx to proxy 4 Apache
Requirements: Proxy to different Apache according to different request URI

The Nginx configuration file is:

2. 
   

4. Upstream AA.com {
   

6. Server 192.168.0.121;
   

8. Server 192.168.0.122;
   

10. }
    

12. 
    

14. Upstream bb.com {
    

16. Server 192.168.0.123;
    

18. Server 192.168.0.124;
    

20. }
    

22. server {
    

24. Listen 80;
    

26. server_name www.abc.com;
    

28. Location ~ aa.php
    

30. {
    

32. Proxy_pass http://aa.com/;
    

34. Proxy_set_header Host $host;
    

36. Proxy_set_header X-real-ip $remote _addr;
    

38. Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
    

40. }
    

42. 
    

44. Location ~ bb.php
    

46. {
    

48. Proxy_pass http://bb.com/;
    

50. Proxy_set_header Host $host;
    

52. Proxy_set_header X-real-ip $remote _addr;
    

54. Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
    

56. }
    

58. }
    

60. 
    

Nginx Proxy Load Balancer--according to the access directory and according to the different Apache