Hi,
how to more easily reproduce: with following configuration file,
located e. g. in /tmp/apache-rex/mod_proxy-cache/httpd.conf:
On Wed, Jun 16, 2021 at 01:01:59PM +0200, pgajdos wrote:
> ------------------------------8<------------------------------------
> ServerName test
> User abuild
> Group abuild
> Listen 60080
> PidFile /tmp/apache-rex/mod_proxy-cache/pid
> ErrorLog /tmp/apache-rex/mod_proxy-cache/error_log
> LoadModule auth_basic_module /usr/lib64/apache2-prefork/mod_auth_basic.so
> LoadModule dir_module /usr/lib64/apache2-prefork/mod_dir.so
> LoadModule authz_host_module /usr/lib64/apache2-prefork/mod_authz_host.so
> LoadModule proxy_module /usr/lib64/apache2-prefork/mod_proxy.so
> LoadModule proxy_http_module /usr/lib64/apache2-prefork/mod_proxy_http.so
> LoadModule cache_module /usr/lib64/apache2-prefork/mod_cache.so
> LoadModule log_config_module /usr/lib64/apache2-prefork/mod_log_config.so
> LoadModule authz_core_module /usr/lib64/apache2-prefork/mod_authz_core.so
> LoadModule cache_socache_module
> /usr/lib64/apache2-prefork/mod_cache_socache.so
> LoadModule socache_shmcb_module
> /usr/lib64/apache2-prefork/mod_socache_shmcb.so
> DocumentRoot /tmp/apache-rex/mod_proxy-cache/htdocs
> DirectoryIndex index.html
>
> ### example configuration
>
> LogFormat "%s %{cache-status}e" cache_format
>
> Listen 60081
> <VirtualHost *:60081>
> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-backend"
> DocumentRoot "/tmp/apache-rex/mod_proxy-cache/htdocs-backend"
> <Directory "/tmp/apache-rex/mod_proxy-cache/htdocs-backend">
> Require local
> </Directory>
> </VirtualHost>
>
> Listen 60082
> <VirtualHost *:60082>
> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-reverse-proxy"
>
> <Location "/app/">
> ProxyPass "http://localhost:60081/";
> </Location>
>
> CacheSocache shmcb
> CacheSocacheMaxSize 102400
> CacheEnable socache "/"
>
> CacheHeader on
>
> CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-uncached.log"
> cache_format env=cache-miss
> CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-cached.log"
> cache_format env=cache-hit
> CustomLog "/tmp/apache-rex/mod_proxy-cache/reverse-proxy-revalidated.log"
> cache_format env=cache-revalidate
> </VirtualHost>
>
> Listen 60083
> <VirtualHost *:60083>
> ErrorLog "/tmp/apache-rex/mod_proxy-cache/error_log-forward-proxy"
>
> ProxyRequests On
> <Proxy "*">
> Require local
> </Proxy>
>
> CacheSocache shmcb
> CacheSocacheMaxSize 102400
> # http://httpd.apache.org/docs/current/mod/mod_cache.html#cacheenable
> CacheEnable socache http://localhost:60081/
>
> CacheHeader on
>
> CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-uncached.log"
> cache_format env=cache-miss
> CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-cached.log"
> cache_format env=cache-hit
> CustomLog "/tmp/apache-rex/mod_proxy-cache/forward-proxy-revalidated.log"
> cache_format env=cache-revalidate
> </VirtualHost>
> ------------------------------>8------------------------------------
following script:
--------------------------------8<------------------------------------
mkdir -p /tmp/apache-rex/mod_proxy-cache/htdocs-backend
echo 'Backend for reverse' >
/tmp/apache-rex/mod_proxy-cache/htdocs-backend/index.html
sleep 1
echo "[2] forward proxy with cache"
for i in $(seq 1 10); do
curl -s -v --proxy http://localhost:60083/ http://localhost:60081/ 2>&1 |
grep 'X-Cache'
sleep 0.1
done
-------------------------------->8------------------------------------
gives:
$ sh run.sh
[2] forward proxy with cache
< X-Cache: MISS from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
< X-Cache: REVALIDATE from test
$
Altering (or touching) the the index file is essential, as well as the
sleep afterwards.
Petr
--
Have a lot of fun!
