Understand the need to install Linux on a service

1  Introduction:
 2      has previously been created in the above two aws ec2 instances, springboard and Linux virtual machines.
3      is now on a Linux virtual machine, install the service some customers need.
4      
5      to simply look at what they are. For doing the.
6      
7 a httpd     // and interactive front page 
8  
9 1 What is?
10  / * 
11  1. The main Apache is a hypertext transfer protocol HTTP server.
12      is designed as a stand-alone daemon,
 13      httpd child process creates a thread to process the request or the pool.
14      
15  2. general, httpd should not be called directly, called by apachectld in Unix-like systems,
 16      in Windows as a service.
17      
18  3. The two versions?
19      httpd-2.2 centos6 RPM package provided by default
20      httpd-2.4 centos7
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22  * / 
23  
24-  
25 two FAP         // front-end API service   

　　needs to connect the database Redis 
26  
27  
28 three BAP         // backend API services and database interaction 
　　
　　needs to be connected and elephant Redis database 
　　connection can change the items in the database address, to establish their own connection to the database. 


29  
30  
31 four NLP         // intelligent customer service 
32  
33  
34 five nginx     // interface to forward the application is forwarded to speak each 80/433 port. For service access. 
35  
36 1 What is?
37 [  / * 
38 is      the Nginx is a free, open-source, high-performance HTTP server and reverse proxy server;
 39     Is also a IMAP, POP3, SMTP proxy server;
 40      Nginx HTTP server can be used as a processing site to publish, in addition Nginx as a reverse proxy load balancing to achieve.
41  * /