Use eval with redis2?

[mcorner]

I am trying to use eval with the redis2 nginx plugin. I want to get the backend server name from redis.

I am trying with this:

location / {

eval_escalate on;

eval $answer {
redis2_raw_query 'get server_name\r\n';
eval_override_content_type text/plain;

redis2_query get server_name;

redis2_pass 127.0.0.1:6379;
}
proxy_pass $answer;

But that doesn't work because the redis response has the string length at the beginning of the response. So you get:

2010/12/28 17:05:34 [error] 52979#0: *73 invalid URL prefix in "$24
http://127.0.0.1/foo//" while sending to client, client: 127.0.0.1, server: localhost, request: "GET / HTTP/1.1", host: "localhost"

Any ideas?

[vkholodkov]

You better talk to the author of redis2 module.

[jnbdz]

@mcorner have you been able to make it work with Redis2?

[jnbdz]

I was able to make it work with http://wiki.nginx.org/HttpRedis

Here is my config:

location = /session {
eval_escalate on;
eval $session {
set $redis_key $cookie_session;
redis_pass [...]:6379;
}

echo $session;
}