Hi Fracis, Thanks for taking a look. With it curl behaves as expected, but with tools like ab and httperf, I am not seeing bad gateway responses when both the upstream servers are down. Read ahead for more details.
Below is info using ab request and curl request. ab: When one upstream server is up: nginx console: <<client_IP>> - - [14/Aug/2015:13:44:57 +0000] "GET / HTTP/1.0" 200 45 "-" "ApacheBench/2.3" <<client_IP>> - - [14/Aug/2015:13:44:57 +0000] "GET / HTTP/1.0" 200 45 "-" "ApacheBench/2.3" upstream httpd server console: <<nginx_IP>> - - [14/Aug/2015:13:44:57 +0000] "GET / HTTP/1.0" 200 45 <<nginx_IP>> - - [14/Aug/2015:13:44:57 +0000] "GET / HTTP/1.0" 200 45 When both upstream servers are down: 2015/08/14 13:43:45 [error] 5#5: *14 connect() failed (111: Connection refused) while connecting to upstream, client: <<client_IP>>, server: , request: "GET / HTTP/1.0", upstream: "http://<upstream_1_IP>>:<port>/", host: "<nginx_IP:<port>" 2015/08/14 13:43:45 [error] 5#5: *14 connect() failed (111: Connection refused) while connecting to upstream, client: <<client_IP>>, server: , request: "GET / HTTP/1.0", upstream: "http://<upstream_2_IP>:<port>/", host: "<nginx_IP:<port>" 2015/08/14 13:43:45 [error] 5#5: *14 no live upstreams while connecting to upstream, client: <<client_IP>>, server: , request: "GET / HTTP/1.0", upstream: "http://ab_backend/";, host: "<nginx_IP:<port>" <<client_IP>> - - [14/Aug/2015:13:43:45 +0000] "GET / HTTP/1.0" 502 172 "-" "ApacheBench/2.3" <<client_IP>> - - [14/Aug/2015:13:43:45 +0000] "GET / HTTP/1.0" 502 172 "-" "ApacheBench/2.3" as a result in bith cases ab just shows all successful responses: # ab -n 1 -c 1 http://<nginx_IP>:<port>/ This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking <<nginx_IP>> (be patient).....done Server Software: nginx/1.9.3 Server Hostname: 10.107.53.127 Server Port: 9000 Document Path: / Document Length: 45 bytes Concurrency Level: 1 Time taken for tests: 0.040 seconds Complete requests: 1 Failed requests: 0 Write errors: 0 Keep-Alive requests: 1 Total transferred: 285 bytes HTML transferred: 45 bytes Requests per second: 24.85 [#/sec] (mean) Time per request: 40.234 [ms] (mean) Time per request: 40.234 [ms] (mean, across all concurrent requests) Transfer rate: 6.92 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 2 2 0.0 2 2 Processing: 39 39 0.0 39 39 Waiting: 38 38 0.0 38 38 Total: 40 40 0.0 40 40 curl: when one upstream is up: <<client_IP>> - - [14/Aug/2015:13:58:37 +0000] "GET / HTTP/1.1" 200 45 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.13.1.0 zlib/1.2.3 libidn/1.18 libssh2/1.2.2" When both upstream servers are down: 2015/08/14 14:00:37 [error] 8#8: *26 connect() failed (111: Connection refused) while connecting to upstream, client: <<client_IP>>, server: , request: "GET / HTTP/1.1", upstream: "http://<upstream_1_IP>:<port>/", host: "<nginx_IP>:<port>" 2015/08/14 14:00:37 [error] 8#8: *26 connect() failed (111: Connection refused) while connecting to upstream, client: <<client_IP>>, server: , request: "GET / HTTP/1.1", upstream: "http://<upstream_2_IP>:<port>/", host: "<nginx_IP>:<port>" <<client_IP>> - - [14/Aug/2015:14:00:37 +0000] "GET / HTTP/1.1" 502 172 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.13.1.0 zlib/1.2.3 libidn/1.18 libssh2/1.2.2" and curl gets a "502 Bad Gateway" which is right. Any suggestions what I might be doing wrong? Posted at Nginx Forum: http://forum.nginx.org/read.php?2,260980,260998#msg-260998 _______________________________________________ nginx mailing list [email protected] http://mailman.nginx.org/mailman/listinfo/nginx
