Hi list,

I've been looking at developing a module that can provide current
backend/upstream server status in a reverse proxy setup.
Is there a way to query all the workers on the current upstreams
status? I just need to know if they are "up" or "down".

The idea is to be able to do something like this:

worker_processes 2;

http {

upstream backend_1 {
server 192.168.0.10:80;
server 192.168.0.11:80;
}

server {
server_name 127.0.0.1;

location /monitor {
upstream_status on;
}
}
}

Then do a curl http://127.0.0.1/monitor and get something like this back:

backend_1;worker_1;192.168.0.10:80;up;
backend_1;worker_2;192.168.0.10:80;up;
backend_1;worker_1;192.168.0.11:80;down;
backend_1;worker_2;192.168.0.11:80;down;

Any hints?

I assume this kind of information must be present somewhere in each
worker, but I just can't seem to figure out how to get to that data.

Thanks,
Srebrenko

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