srcache_nginx+redis构建缓存系统

在《memc_nginx+srcache_nginx+memcached构建透明的动态页面缓存》一文中，我们使用到memcached来作为缓存载体。想必大家都知道memcached有存储大小的限制，不得超过1M。 本文将使用redis来作为缓存载体。nginx的srcache_nginx模块指令参数解释参见《memc_nginx+srcache_nginx+memcached构建透明的动态页面缓存》。

1. nginx模块

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--add-module=../modules/ngx_devel_kit-0.2.18 --add-module=../modules/set-misc-nginx-module-0.22rc8 --add-module=../modules/srcache-nginx-module-0.22 --add-module=../modules/redis-nginx-module-0.3.6 --add-module=../modules/redis2-nginx-module-0.10

nginx模块安装参见中相关文档。

2. redis安装配置

安装步骤参见：http://www./html/1646.html
配置参数解释参见：http://www./html/1226.html
配置实例：
# vim redis.conf

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daemonize yes pidfile /var/run/redis-6379.pid port 6379 bind 127.0.0.1 timeout 0 tcp-keepalive 0 loglevel notice logfile stdout databases 16 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump.rdb slave-serve-stale-data yes slave-read-only yes repl-disable-tcp-nodelay no slave-priority 100 maxmemory 8096mb maxmemory-policy volatile-ttl appendonly no appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-entries 512 list-max-ziplist-value 64 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes

由于只把redis当做缓存使用，因此没有启用持久化。

3. nginx配置

# vim nginx.conf

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http {         include       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" '                                         '"$gzip_ratio" $request_time $bytes_sent $request_length';         log_format srcache_log '$remote_addr - $remote_user [$time_local] "$request" '                                 '"$status" $body_bytes_sent $request_time $bytes_sent $request_length '                                 '[$upstream_response_time] [$srcache_fetch_status] [$srcache_store_status] [$srcache_expire]';         set_real_ip_from 10.0.0.0/8;         real_ip_header X-Forwarded-For;         include          vhosts/test..conf; }

# vim vhosts/test..conf

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upstream redis {         server 127.0.0.1:6379;         keepalive 512; } server        {         listen       80;         server_name  test.;         index index.html index.htm index.php;         root  /data/test./webroot;         location ~ .*\.php {                 srcache_store_private on;                 srcache_methods GET;                 srcache_response_cache_control off;                 if ($uri ~ //pp.php$){                         set $key $request_uri;                         set_escape_uri $escaped_key $key;                         srcache_fetch GET /redis $key;                         srcache_default_expire 172800;                         srcache_store PUT /redis2 key=$escaped_key&exptime=$srcache_expire;                         #add_header X-Cached-From $srcache_fetch_status;                         #set_md5 $md5key $key;                         #add_header X-md5-key $md5key;                         #add_header X-Cached-Store $srcache_store_status;                         #add_header X-Key $key;                         #add_header X-Query_String $query_string;                         #add_header X-expire $srcache_expire; access_log /data/httplogs/test.-photo-access.log srcache_log;                 }                 include fastcgi_params;                 fastcgi_pass  127.0.0.1:9000;                 fastcgi_index index.php;                 fastcgi_connect_timeout 60;                 fastcgi_send_timeout 180;                 fastcgi_read_timeout 180;                 fastcgi_buffer_size 128k;                 fastcgi_buffers 4 256k;                 fastcgi_busy_buffers_size 256k;                 fastcgi_temp_file_write_size 256k;                 fastcgi_intercept_errors on;                 fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;                 fastcgi_split_path_info ^(.+\.php)(.*)$;                 fastcgi_param PATH_INFO $fastcgi_path_info;          }         location = /redis {                 internal;                 set_md5 $redis_key $args;                 redis_pass redis;         }         location = /redis2 {                 internal;                 set_unescape_uri $exptime $arg_exptime;                 set_unescape_uri $key $arg_key;                 set_md5 $key;                 redis2_query set $key $echo_request_body;                 redis2_query expire $key $exptime;                 redis2_pass redis;         }         error_log  /data/httplogs/test.-error.log;         access_log  /data/httplogs/test.-aceess.log main; }

4. 测试

没有做缓存状态：

有做缓存状态：

5. 响应头状态

第一次请求：

再次请求：

6. 查看redis是否缓存以及过期时间

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