Openresty best practices

openresty command

1. start-up

   ./nginx
   

2. stop it

   ./nginx -s stop
   

3. restart

   ./nginx -s reload
   

4. Check

   ./nginx -t
   

   OpenResty Best practices

   • Nginx The maximum number of concurrent connections supported depends on memory ,10W Far from being capped
   • Low memory consumption ,1000 An inactive http keep-alive Connected to the Nginx It only consumes 2.5M Memory , This is a Nginx Support the foundation of high concurrency
   • Nginx High reliability comes from the excellent design of its core framework code 、 Simplicity of module design , And these modules are very stable
   • High scalability
   • Thermal deployment ,master Management process and worker Work process separation design , Yes Nginx It has the possibility of hot deployment , Can be found in 7*24 Under the premise of uninterrupted service , upgrade Nginx The executable of . You can also modify the configuration file without stopping the service , Change log file and other functions
   • The freedom of the BSD license agreement , Not only allow users to use it for free Nginx, Users are also allowed to modify Nginx Source code , It also allows users to use it for commercial purposes

tls When shaking hands ,ssl_certificate_by_lua Which message works 【 Conventional tcp】？
The kernel passes through epoll_wait notice nginx Of worker process … Do certificate verification control

next upstream

nginx Module and cosocket【 coroutines 】

• Network events trigger
• The timer event triggers

from http Cache view process architecture

Interprocess communication
The signal
socket pair
Shared memory
spinlocks

master process
monitor worker process
management worker process
Received signal
term,tnt
quit
hup
usr1
usr2
winch

slab Memory management mechanism

http3 Connection migration