二進位編譯需用軟體

安裝需用軟體：

dnf install gcc-c++ pcre-devel zlib-devel make unzip libuuid-devel -y

ngx_cache_purge 模塊

下載 ngx_cache_purge 並解壓縮：

wget http://labs.frickle.com/files/ngx_cache_purge-2.3.tar.gz

tar zxf ngx_cache_purge-2.3.tar.gz

ngx_cache_purge 預設無法編譯成 NGINX 的動態模塊，所幸有人提交了更新程式 ngx_cache_purge/config at master · nginx-modules/ngx_cache_purge · GitHub，開啟 config 並覆蓋成以下內容：

vim ngx_cache_purge-2.3/config

if [ "$HTTP_PROXY" = "YES" ]; then
    have=NGX_HTTP_PROXY . auto/have
fi

if [ "$HTTP_FASTCGI" = "YES" ]; then
    have=NGX_HTTP_FASTCGI . auto/have
fi

if [ "$HTTP_SCGI" = "YES" ]; then
    have=NGX_HTTP_SCGI . auto/have
fi

if [ "$HTTP_UWSGI" = "YES" ]; then
    have=NGX_HTTP_UWSGI . auto/have
fi

ngx_addon_name=ngx_http_cache_purge_module
CACHE_PURGE_SRCS="$ngx_addon_dir/ngx_cache_purge_module.c"

if [ -n "$ngx_module_link" ]; then
    ngx_module_type=HTTP
    ngx_module_name="$ngx_addon_name"
    ngx_module_srcs="$CACHE_PURGE_SRCS"

    . auto/module
else
    HTTP_MODULES="$HTTP_MODULES $ngx_addon_name"
    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $CACHE_PURGE_SRCS"
fi

have=NGX_CACHE_PURGE_MODULE . auto/have

NGINX

下載二進位檔案

下載 NGINX 二進位檔案並解壓縮，本例為 NGINX 1.16.1 版本 (其它版本可參考 nginx: download)：

wget http://nginx.org/download/nginx-1.16.1.tar.gz

tar zxf nginx-1.16.1.tar.gz

進入 nginx 檔案目錄：

cd nginx-1.16.1

編譯配置

設定 NGINX 編譯配置：

• --add-dynamic-module：新增動態模塊 (為要產生動態模塊的模塊檔案路徑)。
• --with-compat (nginx 1.11.5 新增的指令)：單獨編譯要新增的模塊，原有的 NGINX 即可直接動態加載，而不用重新編譯。

./configure --add-dynamic-module=/root/ngx_cache_purge-2.3 --with-compat

adding module in /root/ngx_cache_purge-2.3
# 此模塊編譯完成的名稱會是這樣
 + ngx_http_cache_purge_module was configured
checking for PCRE library ... found
checking for PCRE JIT support ... found
checking for zlib library ... found
creating objs/Makefile

Configuration summary
  + using system PCRE library
  + OpenSSL library is not used
  + using system zlib library

  nginx path prefix: "/usr/local/nginx"
  nginx binary file: "/usr/local/nginx/sbin/nginx"
  nginx modules path: "/usr/local/nginx/modules"
  nginx configuration prefix: "/usr/local/nginx/conf"
  nginx configuration file: "/usr/local/nginx/conf/nginx.conf"
  nginx pid file: "/usr/local/nginx/logs/nginx.pid"
  nginx error log file: "/usr/local/nginx/logs/error.log"
  nginx http access log file: "/usr/local/nginx/logs/access.log"
  nginx http client request body temporary files: "client_body_temp"
  nginx http proxy temporary files: "proxy_temp"
  nginx http fastcgi temporary files: "fastcgi_temp"
  nginx http uwsgi temporary files: "uwsgi_temp"
  nginx http scgi temporary files: "scgi_temp"

為了只編譯模塊，這裡加上 modules 指令 (要重新編譯需先執行指令 make clean)：

make modules

make -f objs/Makefile modules
make[1]: Entering directory '/root/nginx-1.16.1'
cc -c -fPIC -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules \
        -o objs/addon/ngx_cache_purge-2.3/ngx_cache_purge_module.o \
        /root/ngx_cache_purge-2.3/ngx_cache_purge_module.c
cc -c -fPIC -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs -I src/http -I src/http/modules \
        -o objs/ngx_http_cache_purge_module_modules.o \
        objs/ngx_http_cache_purge_module_modules.c
# 產生的動態模塊路徑
cc -o objs/ngx_http_cache_purge_module.so \
objs/addon/ngx_cache_purge-2.3/ngx_cache_purge_module.o \
objs/ngx_http_cache_purge_module_modules.o \
-shared
make[1]: Leaving directory '/root/nginx-1.16.1'

產生的 ngx_cache_purge 動態模塊為 ngx_http_cache_purge_module.so：

ll objs/

總計 232
drwxr-xr-x. 3 root root     33  4月  8 12:56 addon
-rw-r--r--. 1 root root  17385  4月  8 12:56 autoconf.err
-rw-r--r--. 1 root root  41504  4月  8 12:56 Makefile
-rw-r--r--. 1 root root   7828  4月  8 12:56 ngx_auto_config.h
-rw-r--r--. 1 root root    657  4月  8 12:56 ngx_auto_headers.h
-rw-r--r--. 1 root root    297  4月  8 12:56 ngx_http_cache_purge_module_modules.c
-rw-r--r--. 1 root root  36040  4月  8 12:56 ngx_http_cache_purge_module_modules.o
-rwxr-xr-x. 1 root root 108176  4月  8 12:56 ngx_http_cache_purge_module.so
-rw-r--r--. 1 root root   5856  4月  8 12:56 ngx_modules.c
drwxr-xr-x. 9 root root     91  4月  8 12:56 src

複製模塊至 NGINX 模塊路徑

列出 NGINX 設定來查看模塊路徑：

nginx -V

nginx version: nginx/1.16.1
built by gcc 8.2.1 20180905 (Red Hat 8.2.1-3) (GCC)
built with OpenSSL 1.1.1 FIPS  11 Sep 2018 (running with OpenSSL 1.1.1c FIPS  28 May 2019)
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log  # ... 後續省略 ...

--prefix 路徑內也有一個 modules 目錄，它其實就是連結到 --modules-path 模塊路徑：

ll /etc/nginx/modules

lrwxrwxrwx. 1 root root 29  8月 13  2019 /etc/nginx/modules -> ../../usr/lib64/nginx/modules

將動態模塊 ngx_http_cache_purge_module.so 複製至 NGINX 模塊路徑：

cp objs/ngx_http_cache_purge_module.so /usr/lib64/nginx/modules/

刪除下載與編譯的所有檔案：

cd ~

rm -rf ng*

SELinux 設定

設定 SELinux 允許 httpd (NGINX) 執行模塊：

setsebool -P httpd_execmem 1

設定檔配置

請參考 NGINX 設定有出現 FastCGI Cache 文字的設定。

參考

• FRiCKLE Labs / nginx / ngx_cache_purge
• How do you install this module? · Issue #63 · FRiCKLE/ngx_cache_purge · GitHub
• Nginx 动态加载模块 · Issue #24 · jinhailang/blog · GitHub