srcache_nginx+redis构建缓存系统
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
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 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
http
{
include mime.types;
default_typeapplication/octet-stream;
log_formatmain'$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] [$srcache_expire]';
set_real_ip_from 10.0.0.0/8;
real_ip_header X-Forwarded-For;
include vhosts/test.ttlsa.com.conf;
}
# vim vhosts/test.ttlsa.com.conf
upstream redis {
server 127.0.0.1:6379;
keepalive 512;
}
server
{
listen 80;
server_nametest.ttlsa.com;
index index.html index.htm index.php;
root/data/test.ttlsa.com/webroot;
location ~ .*\.php {
srcache_store_private on;
srcache_methods GET;
srcache_response_cache_control off;
if ($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 $srcache_expire;
access_log /data/httplogs/test.ttlsa.com-photo-access.log srcache_log;
}
include fastcgi_params;
fastcgi_pass127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_connect_timeout 60;
fastcgi_send_timeout 180;
fastcgi_read_timeout 180;
fastcgi_buffer_size 128k;
fastcgi_buffers 4 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_intercept_errors on;
fastcgi_paramSCRIPT_FILENAME$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：
https://www.ttlsa.com/wp-content/uploads/2013/09/no-cache.jpg
有做缓存状态：
https://www.ttlsa.com/wp-content/uploads/2013/09/cache.jpg
5. 响应头状态
第一次请求：
https://www.ttlsa.com/wp-content/uploads/2013/09/cache-2.jpg
再次请求：
https://www.ttlsa.com/wp-content/uploads/2013/09/cache-3.jpg
6. 查看redis是否缓存以及过期时间
https://www.ttlsa.com/wp-content/uploads/2013/09/cache-4.jpg
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