openresty 缓存，
openresty 缓存，
openresty 缓存
永久缓存
永久缓存：除非手动删除，缓存一直有效，适用于不经常变更的数据（如静态页面等）
永久缓存配置
location / {
proxy_store on; #开启永久缓存
root /usr/share/nginx/cache; #缓存存储目录，手动创建，权限与worker线程相同
proxy_temp_path /usr/share/nginx/cache_temp; #缓存临时存储目录，自动创建
proxy_store_access user:rw group:rw all:r; #缓存读写规则
if (!-e $request_filename) { #如果缓存中没有，则从后端服务器中查询
proxy_pass http://172.18.0.3:8080;
}
}
临时缓存
临时缓存：缓存设置有效期，如果在有效时间内没被访问，缓存自动失效
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临时缓存指令
proxy_cache_path ：设置临时缓存路径、空间大小、有效期等，在http模块中设置，其他模块会报错
# proxy_cache_path /usr/share/nginx/cache levels=1:2 keys_zone=cache_one:50m inactive=1m max_size=500m;
/usr/share/nginx/cache：临时缓存保存目录
levels=1:2：临时缓存分层目录，从url hash的尾部截取，
最后一个字符为一级目录，向前2个字符为二级目录
keys_zone=cache_one:50m：缓存区的名称，内存大小为50m
inactive=1m：主动清空在1m内未使用的缓存
max_size=500m：磁盘空间大小为500m
常用指令
proxy_cache_key $host-$uri-$is_args-$args; 设置缓存的key
proxy_cache_convert_head on 是否将head请求转换为get请求，on表示转换
proxy_cache_methods：缓存的http请求方法，如get、post等
proxy_pass http://172.18.0.2:8080 缓存丢失时，访问后端服务获取数据
proxy_cache_lock：是否设置缓存锁
proxy_cache_lock_timeout：缓存锁的过期时间
proxy_cache_use_stale：是否使用过期的数据，可设置多个值，
可选值：error、timeout、updating、http_500等
proxy_cache_background_update on：后台更新缓存，并返回过期的数据给客户端
proxy_cache_use_stale需要设置为updating
proxy_cache_min_uses：同一url请求多少次之后，进行缓存，默认1次
proxy_cache_revalidate：缓存过期时，向后端验证缓存内容是否过期
proxy_no_cache：不将数据保存为缓存
* proxy_no_cache $arg_a $arg_b ==> 请求中参数有a或者b，且值不为空或者0，不缓存
proxy_cache_bypass：不使用nginx缓存，直接访问后端服务
* proxy_cache_bypass $cookie_a ==> cookie中有名为a的cookie，直接去后端服务获取数据
$upstream_cache_status：请求的缓存使用状态
# add_header X-cache-status $upstream_cache_status; # 响应中添加请求头，标识请求的缓存使用状态 HIT：缓存命中 MISS：没有缓存，请求传送到后端 Expired：缓存过期，请求传送到后端 STALE：无法从后端获取数据，返回旧的数据（proxy_cache_use_stale命令设置） BY_PASS：绕过缓存，直接去后端获取数据（proxy_cache_bypass命令设置） REVALIDATED：验证缓存是否过期（proxy_cache_revalidate命令设置）
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临时缓存配置
nginx.conf：proxy_cache_path指令
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
#tcp_nopush on;
keepalive_timeout 65;
#gzip on;
proxy_temp_path /usr/share/nginx/cache_temp # 缓存数据先写入临时目录，再保存到proxy_cache_path指定的目录
proxy_cache_path /usr/share/nginx/cache levels=1:2 keys_zone=cache_one:50m inactive=1m max_size=500m;
include /etc/nginx/conf.d/*.conf;
}
default.conf
server {
listen 80;
server_name localhost;
add_header X-via $server_addr; #代理服务器的ip地址
add_header X-cache-status $upstream_cache_status; #缓存状态
location / {
proxy_cache cache_one; #缓存区的名称
proxy_cache_key $host-$uri-$is_args-$args; #缓存key值，$host：主机名，$uri：请求地址，$is_args：是否含有参数，若有则为？，没有则为空，$args：参数，没有则为空
proxy_cache_valid 200 10m; #缓存有效期，200为10m
proxy_cache_valid 304 1m; #缓存有效期，304为1m
proxy_cache_valid 301 302 1h; #缓存有效期，301、302为1h
proxy_cache_valid any 1m; #缓存有效期，其余为1m
proxy_temp_path /usr/share/nginx/cache_temp; #临时缓存目录
proxy_pass http://192.168.57.10:8080; #代理应用
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
使用示例
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应用
HelloController
@RestController
public class HelloController {
@RequestMapping("/hello")
public String hello(){
System.out.println("瓜田李下");
return "hello 瓜田李下";
}
}
Dockerfile
from java:8 workdir /usr/local/jar copy hello.jar app.jar expose 8080 entrypoint ["java", "-jar", "app.jar"]
edit configuration ==> docker
启动应用
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.7.1) 2022-07-03 07:21:06.803 INFO 1 --- [ main] com.example.demo.DemoApplication : Starting DemoApplication v0.0.1-SNAPSHOT using Java 1.8.0_111 on 02ecd322ed90 with PID 1 (/usr/local/jar/app.jar started by root in /usr/local/jar) 2022-07-03 07:21:06.815 INFO 1 --- [ main] com.example.demo.DemoApplication : No active profile set, falling back to 1 default profile: "default" 2022-07-03 07:21:09.366 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2022-07-03 07:21:09.394 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2022-07-03 07:21:09.395 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.64] 2022-07-03 07:21:09.638 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2022-07-03 07:21:09.638 INFO 1 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2676 ms 2022-07-03 07:21:10.785 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2022-07-03 07:21:10.808 INFO 1 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 5.211 seconds (JVM running for 6.557) 2022-07-03 07:23:30.262 INFO 1 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2022-07-03 07:23:30.263 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2022-07-03 07:23:30.265 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 2 ms
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openresty
nginx.conf
pcre_jit on;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
client_body_temp_path /var/run/openresty/nginx-client-body;
proxy_temp_path /var/run/openresty/nginx-proxy;
fastcgi_temp_path /var/run/openresty/nginx-fastcgi;
uwsgi_temp_path /var/run/openresty/nginx-uwsgi;
scgi_temp_path /var/run/openresty/nginx-scgi;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
proxy_cache_path /usr/share/nginx/cache levels=1:2 keys_zone=cache_one:50m inactive=1m max_size=500m;
# 需要先创建缓存目录：/usr/share/nginx/cache
include /etc/nginx/conf.d/*.conf;
}
default.conf
server {
listen 80;
server_name localhost;
add_header X-via $server_addr; #代理服务器的ip地址
add_header X-cache-status $upstream_cache_status; #缓存状态
location / {
proxy_cache cache_one; #缓存区的名称
proxy_cache_key $host-$uri-$is_args-$args; #缓存key值，$host：主机名，$uri：请求地址，$is_args：是否含有参数，若有则为？，没有则为空，$args：参数，没有则为空
proxy_cache_valid 200 10m; #缓存有效期，200为10m
proxy_cache_valid 304 1m; #缓存有效期，304为1m
proxy_cache_valid 301 302 1h; #缓存有效期，301、302为1h
proxy_cache_valid any 1m; #缓存有效期，其余为1m
proxy_temp_path /usr/share/nginx/cache_temp; #临时缓存目录
proxy_pass http://172.18.0.3:8080; #代理应用
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
创建容器
docker run -it -d --net fixed --ip 172.18.0.12 -p 8000:80 \ -v /Users/huli/lua/openresty/conf6/cache:/usr/share/nginx/cache \ -v /Users/huli/lua/openresty/conf6/nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf \ -v /Users/huli/lua/openresty/conf6/default.conf:/etc/nginx/conf.d/default.conf \ --name openresty6 lihu12344/openresty
使用测试
# 调用接口 huli@hudeMacBook-Pro conf6 % curl localhost:8000/hello hello 瓜田李下% # 查看缓存 huli@hudeMacBook-Pro conf6 % ls cache 5 huli@hudeMacBook-Pro conf6 % ls cache/5 7e huli@hudeMacBook-Pro conf6 % ls cache/5/7e 5223a0e758429d71efb8d04f348527e5 huli@hudeMacBook-Pro conf6 % cat cache/5/7e/5223a0e758429d71efb8d04f348527e5 ?H?b?????????F?b???Ji? KEY: localhost-/hello-- HTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 18 Date: Sun, 03 Jul 2022 07:34:34 GMT Connection: close hello 瓜田李下
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