踩坑日记--CentOS编译安装lua模块

[Tsl_Dragon]

安装好Lua模块（LuaJIT-2.0.5）以及在/etc/profile添加完环境变量之后，nginx添加第三方的ngx_devel_kit模块、lua-nginx-module模块编译之后，首次启动nginx（/etc/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf）命令行报如下错误：

报错详情

./nginx: error while loading shared libraries: libluajit-5.1.so.2: cannot open shared object file: No such file or director

报错原因
/etc/ld.so.conf 此文件记录了编译时使用的动态库的路径，也就是加载so库的路径。默认情况下，编译器只会使用/lib和/usr/lib这两个目录下的库文件，而通常通过源码包进行安装时，如果不
指定--prefix会将库安装在/usr/local目录下，而又没有在文件/etc/ld.so.conf中添加/usr/local/lib这个目录>。这样虽然安装了源码包，但是使用时仍然找不到相关的.so库，就会报错。

解决办法
#手动将动态库libluajit-5.1.so.2加载路径添加到ld.so.conf文件中，命令如下
echo “/usr/local/LuaJIT/lib” >> /etc/ld.so.conf
#将文件/etc/ld.so.conf列出的路径下的库文件缓存到/etc/ld.so.cache以供使用
ldconfig

再次运行./nginx -V，发现问题解决

[root@mrpopos sbin]# ./nginx -V
nginx version: nginx/1.14.1
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_gzip_static_module --with-http_realip_module --with-http_sub_module --with-http_ssl_module --with-http_realip_module --with-http_sub_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_auth_request_module --with-http_random_index_module --with-http_slice_module --with-http_stub_status_module --add-module=../ngx_cache_purge --add-module=/usr/local/src/nginx-upsync-module --add-module=/usr/local/src/ngx_devel_kit --add-module=/usr/local/src/lua-nginx-module

启动nginx（./nginx -c /usr/local/nginx/conf/nginx.conf）又报错，一波刚平一波又起，命令行又报如下错误：

报错详情

[root@mrpopos sbin]# ./nginx -c /usr/local/nginx/conf/nginx.conf
nginx: [alert] detected a LuaJIT version which is not OpenResty's; many optimizations will be disabled and performance will be compromised (see https://github.com/openresty/luajit2 for OpenResty's LuaJIT or, even better, consider using the OpenResty releases from https://openresty.org/en/download.html)
nginx: [alert] failed to load the 'resty.core' module (https://github.com/openresty/lua-resty-core); ensure you are using an OpenResty release from https://openresty.org/en/download.html (reason: module 'resty.core' not found:
	no field package.preload['resty.core']
	no file './resty/core.lua'
	no file '/usr/local/LuaJIT/share/luajit-2.0.5/resty/core.lua'
	no file '/usr/local/share/lua/5.1/resty/core.lua'
	no file '/usr/local/share/lua/5.1/resty/core/init.lua'
	no file '/usr/local/LuaJIT/share/lua/5.1/resty/core.lua'
	no file '/usr/local/LuaJIT/share/lua/5.1/resty/core/init.lua'
	no file './resty/core.so'
	no file '/usr/local/lib/lua/5.1/resty/core.so'
	no file '/usr/local/LuaJIT/lib/lua/5.1/resty/core.so'
	no file '/usr/local/lib/lua/5.1/loadall.so'
	no file './resty.so'
	no file '/usr/local/lib/lua/5.1/resty.so'
	no file '/usr/local/LuaJIT/lib/lua/5.1/resty.so'
	no file '/usr/local/lib/lua/5.1/loadall.so') in /usr/local/nginx/conf/nginx.conf:210

报错原因
编译的时候使用了最新版本的lua-nginx-module模块，使用了最新版就会触发该问题，官方还未修复

解决办法
使用低版本lua-nginx-module-0.10.14方可解决