Hi.
Dec 21, 2019 8:40:38 AM Christopher Faulet : > Le 20/12/2019 à 15:53, Aleksandar Lazic a écrit : > > > Hi. > > > > Luckly that haproxy 2.1 have now the feature of fcgi proto it's now time to > > move > > from nginx to haproxy for the loadbalancing part for me. > > > > There are several features from nginx conf which I would like to port to > > haproxy > > conf therefore I need some help ;-) > > > > nginx offers a quite good caching feature like "fastcgi_cache_path". I know > > that > > haproxy cache is only in memory. Have anyone a suggestion what's the "best" > > way > > to cache the response from the fcgi backend? > > > > http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache_path > > > > That's the config values from nginx. > > > > ``` > > fastcgi_cache_path /opt/sde/nginx/fastcgi_cache_www levels=1:2 > > use_temp_path=off > > keys_zone=www:256m max_size=256m; > > fastcgi_cache_key "$scheme$host$request_uri$is_args$args"; > > > > fastcgi_cache_revalidate on; > > fastcgi_cache_valid any 30s; > > fastcgi_cache_use_stale error timeout updating http_500 http_503; > > fastcgi_cache_lock on; > > > > ``` > > > > I know that there is nuster but have not yet 2.1 in use. > > > > > > Hi Aleks, > > If the fcgi response is cacheable, you can use the HAProxy cache, just like > for > any other HTTP/1.1 response. The fcgi and the cache are two orthogonal > feature. > You may use a dedicated cache for fcgi response, with specifics max-age and > max-object-size. About the "best" way to cache fcgi responses, it really > depends > on your application. IMHO, it is your scripts responsibility to set the right > "Cache-Control" header. Thanks for answer. I would also like to modify the cache key but for now only host and uri is used as you can see in the code. http://git.haproxy.org/?p=haproxy.git;a=blob;f=src/cache.c;h=8e2acd1cb191ef5678efdd776e54df7112d76509;hb=HEAD#l10587 http://git.haproxy.org/?p=haproxy.git;a=blob;f=src/cache.c;h=8e2acd1cb191ef5678efdd776e54df7112d76509;hb=HEAD#l1136 I would like to set such a key. > fastcgi_cache_key "$scheme$host$request_uri$is_args$args"; It's like a feature request for something like this. option cache_key "%[schema]℅[req.fhdr(host)]℅[url]℅[path]℅[query]" option cache_key "sdbm(%[schema]℅[req.fhdr(host)]℅[url]℅[path]℅[query])" option cache_key "%[schema]℅[req.fhdr(host)]℅[url]℅[path]" if ! %[query] option cache_key "%[schema]℅[req.fhdr(host)]℅[url]℅[path]?℅[query]" if %[query] Which function can be used to resolve the variables an use it for the key? I'm not sure if $is_args have a equivalent variable in haproxy. http://nginx.org/en/docs/http/ngx_http_core_module.html#var_is_args Maybe the "option cache_key ... " should be able to have a "if/unless" possibility. I could try to implement this ;-) The idea is to have "option cache_key ..." and in " http_action_req_cache_use " check if the option is set if not use the current function else use the variables resolve function and make the sha2/xxhash64 hask key from the return of the variables resolve function. Opinions? > Regards, > -- > Christopher Faulet Regards Aleks
