软件准备
Tengine官网：http://tengine.taobao.org/
$ wget http://tengine.taobao.org/download/tengine-2.2.0.tar.gz Lua官网：http://www.lua.org/
$ wget http://www.lua.org/ftp/lua-5.3.4.tar.gz LuaJIT官网：http://luajit.org/
$ wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz GraphicsMagick官网：http://www.graphicsmagick.org/
$ wget https://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.26/GraphicsMagick-1.3.26.tar.gz1.安装 Lua 依赖工具（Lua安装所需）
$ sudo yum -y install readline readline-devel如果不安装readline和readline-devel，在安装Lua时会报如下错误 致命错误：readline/readline.h：没有那个文件或目录
2. 安装 Lua
$ tar -zxvf lua-5.3.4.tar.gz $ cd lua-5.3.4 $ make linux && make install执行命令后如果可以看到lua的版本信息，使用print来打印内容
$ lua Lua 5.3.4 Copyright (C) 1994-2017 Lua.org, PUC-Rio > print('Hello Lua') Hello Lua3. 安装LuaJIT
$ tar -zxvf LuaJIT-2.0.5.tar.gz $ cd LuaJIT-2.0.5 $ sudo make && make install配置环境变量（笔者配置在用户变量，你也可以配置在profile中）
$ vim ~/.bashrc export LUAJIT_LIB=/usr/local/lib export LUAJIT_INC=/usr/local/include/luajit-2.0 $ source ~/.bashrc4. 安装Tengine
$ tar -zxvf tengine-2.2.0.tar.gz $ cd tengine-2.2.0 $ ./configure --prefix=/usr/local/Tengine --dso-path=/usr/local/Tengine/modules --with-http_realip_module --with-http_gzip_static_module --with-http_stub_status_module --with-http_concat_module --with-http_lua_module --http-proxy-temp-path=/var/tmp/Tengine/proxy_temp --http-fastcgi-temp-path=/var/tmp/Tengine/fastcgi_temp --http-uwsgi-temp-path=/var/tmp/Tengine/uwsgi_temp --http-scgi-temp-path=/var/tmp/Tengine/cgi_temp --http-client-body-temp-path=/var/tmp/Tengine/client_body_temp --http-log-path=/var/log/Tengine/access.log --error-log-path=/var/log/Tengine/error.log执行上面的命令后，打印的信息中笔者看到有Lua的库找不到（如果Lua库找不到在启动Tengine时会报错）
解决方法：配置LuaJIT的环境变量或执行如下命令
$ ln -s /usr/local/lib/libluajit-5.1.so.2 /lib64/libluajit-5.1.so.2编译安装
$ sudo make && make install测试
$ /usr/local/Tengine/sbin执行命令测试，出现如下类似信息，表示安装成功
$ ./nginx -t nginx: the configuration file /usr/local/Tengine/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/Tengine/conf/nginx.conf test is successful执行 ./nginx -t 后，笔者遇到两个问题，错误及解放方法如下
错误1：./nginx: error while loading shared libraries: libluajit-5.1.so.2: cannot open shared object file: No such file or directory
解决方法：执行如下命令
ln -s /usr/local/lib/libluajit-5.1.so.2 /lib64/libluajit-5.1.so.2 错误2：错误2：nginx: [emerg] mkdir() “/var/tmp/Tengine/client_body_temp” failed (2: No such file or directory)
解决方法：执行命令创建文件mkdir -p /var/tmp/Tengine/client_body_temp
$ mkdir -p /var/tmp/Tengine/client_body_temp进入 /usr/local/Tengine/sbin 目录下，输入如下命令启动
$ ./nginx启动成功后，在浏览器输入ip，可以看到 tengine 的欢迎页面
5.安装 GraphicsMagick 依赖工具
$ sudo yum -y install libjpeg libjpeg-devel libpng libpng-devel giflib giflib-devel freetype freetype-devel6. 安装GraphicsMagick
$ tar -zxvf GraphicsMagick-1.3.26.tar.gz $ cd GraphicsMagick-1.3.26 $ ./configure --prefix=/usr/local/GraphicsMagick --enable-shared $ make && make install编译完成后进入GraphicsMagick的bin目录下
$ cd /usr/local/GraphicsMagick/bin查看命令帮助：
$ ./gm GraphicsMagick 1.3.26 2017-07-04 Q8 http://www.GraphicsMagick.org/ Copyright (C) 2002-2017 GraphicsMagick Group. Additional copyrights and licenses apply to this software. See http://www.GraphicsMagick.org/www/Copyright.html for details. Usage: ./gm command [options ...] Where commands include: animate - animate a sequence of images batch - issue multiple commands in interactive or batch mode benchmark - benchmark one of the other commands compare - compare two images composite - composite images together conjure - execute a Magick Scripting Language (MSL) XML script convert - convert an image or sequence of images display - display an image on a workstation running X help - obtain usage message for named command identify - describe an image or image sequence import - capture an application or X server screen mogrify - transform an image or sequence of images montage - create a composite image (in a grid) from separate images time - time one of the other commands version - obtain release version查看版本信息，输入如下命令后，如果看到如下类似的信息，表示安装成功
$ ./gm version GraphicsMagick 1.3.26 2017-07-04 Q8 http://www.GraphicsMagick.org/ Copyright (C) 2002-2017 GraphicsMagick Group. Additional copyrights and licenses apply to this software. See http://www.GraphicsMagick.org/www/Copyright.html for details. Feature Support: Native Thread Safe yes Large Files (> 32 bit) yes Large Memory (> 32 bit) yes BZIP yes DPS no FlashPix no FreeType yes Ghostscript (Library) no JBIG no JPEG-2000 no JPEG yes Little CMS no Loadable Modules no OpenMP yes (201107) PNG yes TIFF no TRIO no UMEM no WebP no WMF no X11 yes XML yes ZLIB yes Host type: x86_64-unknown-linux-gnu Configured using the command: ./configure '--prefix=/usr/local/GraphicsMagick' '--enable-shared' Final Build Parameters: CC = gcc -std=gnu99 CFLAGS = -fopenmp -g -O2 -Wall -pthread CPPFLAGS = -I/usr/include/freetype2 -I/usr/include/libxml2 CXX = g++ CXXFLAGS = -pthread LDFLAGS = LIBS = -lfreetype -ljpeg -lpng15 -lX11 -llzma -lbz2 -lxml2 -lz -lm -lgomp -lpthread使用 GraphicsMagick 来裁剪一张图
$ rz # 上传图片test.jpg到~/photo路径下执行命令裁剪图片
$ sudo ./gm convert ~/photo/test.jpg -resize 200x200 ~/photo/small.jpg下载裁剪完成后的图片（图片变小但不会失真）
$ sz ~/photo/small.jpg1.nginx + lua 测试
配置nginx.conf文件
$ cd /usr/local/Tengine/ $ cd conf为了保险起见，我们先备份一下nginx.conf文件
$ cp nginx.conf nginx.conf.bak编辑nginx.conf文件
# vim nginx.conf找到 #user nobody; 在它的下一行添加如下代码
user root在server块（大概在）中添加如下代码
location /lua/ { default_type 'text/html'; content_by_lua 'ngx.say("<h1>hello, lua</h1>")'; }保存退出，后执行如下命令重新加载ngnix
# ./nginx -s reload浏览器访问：IP/lua/
2.裁剪图
(1).配置nginx
# cd /usr/local/Tengine/conf # vim nginx.conf找到 #user nobody; 在它的下一行添加如下代码
user rootserver 中新增location
server { listen 80; server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / { #root html; root /home/hadoop/images; index index.html index.htm; } location /lua/ { default_type 'text/html'; content_by_lua 'ngx.say("<h1>hello, lua</h1>")'; } # url格式：如：xxxx.gif_数字x数字.gif location ~* ^(.+\.(jpg|jpeg|gif|png))_(\d+)x(\d+)\.(jpg|jpeg|gif|png)$ { root /home/hadoop/images; # 根目录（必须设置） if (!-f $request_filename) { # 如果文件不存在才裁剪 # 在编写外部 Lua 脚本时，设置为 off Nginx 不会缓存 Lua，方便调试 lua_code_cache off; set $request_filepath /home/hadoop/images/$1; # 原始图片路径 set $width $3; # 设置裁剪/缩放的宽度 set $height $4; # 设置裁剪/缩放的高度 set $ext $5; # 图片文件格式后缀 content_by_lua_file /usr/local/Tengine/lua/ImageResizer.lua; # 加载外部lua文件 } }(2).编写脚本
进入如下目录
# cd /usr/local/Tengine/新建文件夹lua，lua下新建文件
# mkdir lua # touch ImageResizer.lua # vim ImageResizer.luaImageResizer.lua 文件中编写代码如下
local command = "/usr/local/GraphicsMagick/bin/gm convert " .. ngx.var.request_filepath .. " -resize " .. ngx.var.width .. "x" .. ngx.var.height .. " +profile \"*\" " .. ngx.var.request_filepath .. "_" .. ngx.var.width .. "x" .. ngx.var.height .. "." .. ngx.var.ext; os.execute(command); # 执行裁剪命令 ngx.exec(ngx.var.request_uri); # 输出裁剪后的图片(3).执行并查看结果
输入如下命令重新加载nginx，使用修改的配置立即生效
# ./nginx -s reload浏览器访问：http://IP/test.jpg_300x300.jpg
