The configuration directives "RewirteRule" and "Redirect" are having flags
to send a FORBIDDEN or GONE response but I need something to send a 503
service_unavailable response to keep away traffic from my proxied backends
during maintenance work.
The idea is to use a RewriteMap for this cause I could modify the mapfile
to apply maintenance URLs without restarting the httpd server.
EXAMPLE:
$APACHE_HOME/conf/map-offline.conf:
appl1 /errmsg/maintenance
appl2 /errmsg/gone
RewirteMap offline txt:conf/map-offline.conf
RewriteRule ^/([^/]*)(.*)$ ${offline:$1|%{REQUEST_URI}} [NC,PT]
Redirect gone "/errmsg/gone"
Redirect maintenance "/errmsg/maintenance"
Using this setup any request on /appl2/anywhere gets a 410 GONE response -
nice
But something like this to get a 503 response is not available.
I only need to add some lines of code into mod_alias to get the maintenance
response. No big deal.
But maybe someone here knows a setup working without extending the source
code.
Thanks,
Hendrik
