Nginx+Lua 开发的 hello world 案例详解-白红宇

Nginx+Lua 开发的 hello world 案例详解

阅读量：2393 次

发布时间：2019-05-10

本文共 3838 字，大约阅读时间需要 12 分钟。

编辑 Nginx 配置文件

# cd /opt/modules/openresty/nginx/conf
# cp nginx.conf nginx.conf.example    # 备份 nginx.conf 文件
# vi nginx.conf
worker_processes  1;
events { 
    worker_connections  1024;
}
http { 
    include       mime.types;
    default_type  application/octet-stream;
    # 在 http 部分添加，如下两个配置，将加载 Lua 相关库
    lua_package_path "/opt/modules/openresty/lualib/?.lua;;";
    lua_package_cpath "/opt/modules/openresty/lualib/?.so;;";

    sendfile        on;
    keepalive_timeout  65;
    server { 
        listen       8081;
        server_name  localhost;
        location / { 
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html { 
            root   html;
        }
    }
}

创建 lua.conf

# cd /opt/modules/openresty/nginx/conf
# vi lua.conf
server { 
    listen       80;
    server_name  _;
}

在 nginx.conf 的 http 部分添加 :

# cd /opt/modules/openresty/nginx/conf
# vi 
nginx.conf

worker_processes  1;
events { 
    worker_connections  1024;
}
http { 
    include       mime.types;
    default_type  application/octet-stream;
    # 在 http 部分添加，如下两个配置，将加载 Lua 相关库
    lua_package_path "/opt/modules/openresty/lualib/?.lua;;";
    lua_package_cpath "/opt/modules/openresty/lualib/?.so;;";
    # 加载 Lua 配置先关文件
    include lua.conf;
    sendfile        on;
    keepalive_timeout  65;
    server { 
        listen       8081;
        server_name  localhost;
        location / { 
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html { 
            root   html;
        }
    }
}

验证配置是否正确 :

# cd /opt/modules/openresty/nginx
# ./sbin/nginx -t
nginx: the configuration file /opt/modules/openresty/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /opt/modules/openresty/nginx/conf/nginx.conf test is successful

在 lua.conf 的 server 部分 /lua 请求路径的拦截配置 :

# cd 
/opt/modules/openresty/nginx/conf
# vi 
lua.conf
server { 
    listen       80;
    server_name  _;
   
# 添加 /lua 路径的配置
    
location /lua { 
        default_type 'text/html';
        content_by_lua 'ngx.say("hello world")';
    }
}
# 检测修改的配置是否正常
# cd /opt/modules/openresty/nginx
# ./sbin/nginx -t
nginx: the configuration file /opt/modules/openresty/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /opt/modules/openresty/nginx/conf/nginx.conf test is successful

启动 Nginx 或者重新 Nginx 加载配置

# 启动 Nginx
# /opt/modules/openresty/nginx/sbin/nginx
# 重新 Nginx 加载配置
# /opt/modules/openresty/nginx/sbin/nginx -s reload

访问

创建 Lua 脚本测试文件 test.lua

# cd /opt/modules/openresty/nginx/conf
# mkdir lua
# vi lua/test.lua
ngx.say("hello world");

修改 lua.conf

# /opt/modules/openresty/nginx/conf
# vi lua.conf
server { 
    listen       80;
    server_name  _;
    location /lua { 
        default_type 'text/html';
        # content_by_lua 'ngx.say("hello world")';  去掉，引入 Lua 脚本文件
        content_by_lua_file conf/lua/test.lua;
    }
}
# 检测修改的配置是否正常
# cd /opt/modules/openresty/nginx
# ./sbin/nginx -t
nginx: the configuration file /opt/modules/openresty/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /opt/modules/openresty/nginx/conf/nginx.conf test is successful
# ./sbin/nginx -s reload
   
# 重新加载配置

查看异常日志

# tail -f /opt/modules/openresty/nginx/logs/error.log
2018/05/10 20:04:56 [emerg] 23754#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2018/05/10 20:04:56 [emerg] 23754#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2018/05/10 20:04:56 [emerg] 23754#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2018/05/10 20:04:56 [emerg] 23754#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2018/05/10 20:04:56 [emerg] 23754#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2018/05/10 20:04:56 [emerg] 23754#0: still could not bind()
2018/05/10 20:46:16 [notice] 23890#0: signal process started
2018/05/10 20:48:25 [notice] 23902#0: signal process started
2018/05/10 20:48:29 [error] 23903#0: *1 open() "/opt/modules/openresty/nginx/html/favicon.ico" failed (2: No such file or directory), client: 192.168.242.1, server: _, request: "GET /favicon.ico HTTP/1.1", host: "ci-server", referrer: "http://ci-server/lua"
2018/05/10 20:56:22 [notice] 23925#0: signal process started