That's what I love nginx for. Really simple and declarative. At 8086 we have a service that is non-stable, at 8091 there is virtual gif substitutor. On 300ms timeout there will be 1x1 gif as a response. Nginx resides on 8090 for presentation.
http {
include mime.types;
default_type application/octet-stream;
upstream backend {
server localhost:8086;
server localhost:8091 backup;
}
server {
listen 8090;
server_name localhost:8090;
location /sf.gif { empty_gif; }
location / {
proxy_pass http://backend;
proxy_next_upstream error timeout
invalid_header http_500 http_502 http_503
http_504 http_403 http_404;
proxy_connect_timeout 300ms;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For
$proxy_add_x_forwarded_for;
proxy_redirect off;
}
}
server {
listen 8091;
server_name localhost:8091;
location / {
rewrite ^ http://localhost:8090/sf.gif redirect; }
location ^ {
rewrite ^ http://localhost:8090/sf.gif redirect; }
}
}
http {
include mime.types;
default_type application/octet-stream;
upstream backend {
server localhost:8086;
server localhost:8091 backup;
}
server {
listen 8090;
server_name localhost:8090;
location /sf.gif { empty_gif; }
location / {
proxy_pass http://backend;
proxy_next_upstream error timeout
invalid_header http_500 http_502 http_503
http_504 http_403 http_404;
proxy_connect_timeout 300ms;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For
$proxy_add_x_forwarded_for;
proxy_redirect off;
}
}
server {
listen 8091;
server_name localhost:8091;
location / {
rewrite ^ http://localhost:8090/sf.gif redirect; }
location ^ {
rewrite ^ http://localhost:8090/sf.gif redirect; }
}
}
