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failover to the next upstream server if one of the servers is slow

June 22, 2018 06:50PM
Hello,

i'm trying to setup a failover configuration between two upstream servers, all works as expected. But i want to cover the case if one of the upstream servers is became a very slow and i want to remove this servers from rotation and move all requests to the second upstream server.

upstream rubyfe {
server qa-vmf01.int:443;
server qa-vmf02.int:443;
}


server {
listen 443 http2;
server_name qa-www.example.com;
gzip on;
proxy_connect_timeout 300;
proxy_send_timeout 300;
proxy_read_timeout 300;
send_timeout 300;
proxy_buffering on;
location / {
proxy_read_timeout 1;
proxy_pass https://rubyfe;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_next_upstream_timeout 3;
}



when i tried to load the first server
#stress --cpu 80 --io 8 --vm 4 --vm-bytes 300M --timeout 180s

# wrk -t2 -c20 -d30s https://qa-www.example.com

in log files i catched request from "wrk"
192.168.0.1 - - [22/Jun/2018:17:59:10 -0400] "GET / HTTP/1.1" 200 50393 "-" "-" "-" "192.168.0.2:443, 192.168.0.3:443 [ 1.001, 0.814 ]" "text/html; charset=utf-8" "-" "582bd020659715d66afafad533f7ac5d" "TLSv1.2/ECDHE-RSA-AES256-GCM-SHA384 "



but at this time i tried to get result via "curl" i seen

$ curl -IL https://qa-www.example.com/
HTTP/1.1 502 Bad Gateway



could you help me to understand how i can operate timeouts of requests to the upstream servers and in case if one of the upstream server became is slow to force requests switch to another server
Subject Author Posted

failover to the next upstream server if one of the servers is slow

ebondar June 22, 2018 06:50PM

Re: failover to the next upstream server if one of the servers is slow

itpp2012 June 22, 2018 07:00PM

Re: failover to the next upstream server if one of the servers is slow

ebondar June 22, 2018 07:31PM

Re: failover to the next upstream server if one of the servers is slow

itpp2012 June 23, 2018 06:40AM



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