srcache_nginx+redis构建缓存系统

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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

--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ttlsa.com中相关文档。

2. redis安装配置

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

daemonize yespidfile /var/run/redis-6379.pidport 6379bind 127.0.0.1timeout 0tcp-keepalive 0loglevel noticelogfile stdoutdatabases 16stop-writes-on-bgsave-error yesrdbcompression yesrdbchecksum yesdbfilename dump.rdbslave-serve-stale-data yesslave-read-only yesrepl-disable-tcp-nodelay noslave-priority 100maxmemory 8096mbmaxmemory-policy volatile-ttlappendonly noappendfsync everysecno-appendfsync-on-rewrite noauto-aof-rewrite-percentage 100auto-aof-rewrite-min-size 64mblua-time-limit 5000slowlog-log-slower-than 10000slowlog-max-len 128hash-max-ziplist-entries 512hash-max-ziplist-value 64list-max-ziplist-entries 512list-max-ziplist-value 64set-max-intset-entries 512zset-max-ziplist-entries 128zset-max-ziplist-value 64activerehashing yesclient-output-buffer-limit normal 0 0 0client-output-buffer-limit slave 256mb 64mb 60client-output-buffer-limit pubsub 32mb 8mb 60hz 10aof-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

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.ttlsa.com.conf;}

# vim vhosts/test.ttlsa.com.conf

upstream redis {        server 127.0.0.1:6379;        keepalive 512;}server       {        listen       80;        server_name  test.ttlsa.com;        index index.html index.htm index.php;        root  /data/test.ttlsa.com/webroot;        location ~ .*\.php {                srcache_store_private on;                srcache_methods GET;                srcache_response_cache_control off;                if ($uri ~ /ttlsa.com/pp.php$){                        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.ttlsa.com-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.ttlsa.com-error.log;        access_log  /data/httplogs/test.ttlsa.com-aceess.log main;}

4. 测试

没有做缓存状态：
memc-nginx
有做缓存状态：

5. 响应头状态

第一次请求：
memc-nginx
再次请求：

6. 查看redis是否缓存以及过期时间

memc-nginx

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