Forgot to cc the list. ---------- Forwarded message ---------- From: Igor Cicimov <ig...@encompasscorporation.com> Date: Tue, Apr 7, 2015 at 4:25 PM Subject: Re: "proxy haproxy has no server available!" To: "Krishna Kumar Unnikrishnan (Engineering)" <krishna...@flipkart.com>
On Tue, Apr 7, 2015 at 3:58 PM, Krishna Kumar Unnikrishnan (Engineering) < krishna...@flipkart.com> wrote: > Thanks Igor for the suggestion. I get: > > root@haproxy-2:/var/www# curl --http1.0 -X HEAD > 192.168.122.101:80/check.txt > curl: (18) transfer closed with 168 bytes remaining to read > root@haproxy-2:/var/www# curl --http1.0 -X HEAD > 192.168.122.102:80/check.txt > curl: (18) transfer closed with 168 bytes remaining to read > > And without the flags: > > root@haproxy-2:/var/www# curl 192.168.122.102:80/check.txt > <html> > <head><title>404 Not Found</title></head> > <body bgcolor="white"> > <center><h1>404 Not Found</h1></center> > <hr><center>nginx/1.6.2</center> > </body> > </html> > > Is this the problem? I am not sure how to fix it. > > Obviously the given txt file does not exist in your nginx document root directory. You said you are migrating the setup so wonder how did this use to work till now? > Thanks, > - KK > > On Tue, Apr 7, 2015 at 11:10 AM, Igor Cicimov < > ig...@encompasscorporation.com> wrote: > >> >> >> On Tue, Apr 7, 2015 at 3:24 PM, Krishna Kumar Unnikrishnan (Engineering) >> <krishna...@flipkart.com> wrote: >> >>> Sorry, forgot to mention, this is haproxy version 1.5.11 >>> >>> >>> On Tue, Apr 7, 2015 at 10:52 AM, Krishna Kumar Unnikrishnan >>> (Engineering) <krishna...@flipkart.com> wrote: >>> >>>> Hi all, >>>> >>>> I am moving from using LXC to KVM for haproxy on my Debian 7 system. >>>> When I >>>> start haproxy, I get this error: >>>> _________________________________________ >>>> Apr 7 10:38:22 localhost haproxy[3418]: Proxy haproxy started. >>>> Apr 7 10:38:24 localhost haproxy[3420]: Server haproxy/nginx-1 is >>>> DOWN, reason Layer4 timeout, check duration: 2000ms. 1 active and 0 backup >>>> servers left. 0 essions active, 0 requeued, 0 remaining in queue. >>>> Apr 7 10:38:24 localhost haproxy[3419]: Server haproxy/nginx-1 is >>>> DOWN, reason Layer4 timeout, check duration: 2001ms. 1 active and 0 backup >>>> servers left. 0 essions active, 0 requeued, 0 remaining in queue. >>>> Apr 7 10:38:25 localhost haproxy[3420]: Server haproxy/nginx-2 is >>>> DOWN, reason Layer4 timeout, check duration: 2001ms. 0 active and 0 backup >>>> servers left. 0 essions active, 0 requeued, 0 remaining in queue. >>>> Apr 7 10:38:25 localhost haproxy[3420]: proxy haproxy has no server >>>> available! >>>> Apr 7 10:38:25 localhost haproxy[3419]: Server haproxy/nginx-2 is >>>> DOWN, reason Layer4 timeout, check duration: 2001ms. 0 active and 0 backup >>>> servers left. 0 essions active, 0 requeued, 0 remaining in queue. >>>> Apr 7 10:38:25 localhost haproxy[3419]: proxy haproxy has no server >>>> available! >>>> >>>> From outside the haproxy, I get the error: >>>> # wget 192.168.122.112:80 >>>> --2015-04-07 10:48:47-- http://192.168.122.112/ >>>> Connecting to 192.168.122.112:80... connected. >>>> HTTP request sent, awaiting response... 503 Service Unavailable >>>> 2015-04-07 10:48:47 ERROR 503: Service Unavailable. >>>> _______________________________________________________________ >>>> >>>> The config file is: >>>> global >>>> log 127.0.0.1 local0 >>>> log 127.0.0.1 local1 notice >>>> maxconn 65536 >>>> daemon >>>> quiet >>>> nbproc 2 >>>> debug >>>> user haproxy >>>> group haproxy >>>> >>>> defaults >>>> log global >>>> mode http >>>> option dontlognull >>>> retries 3 >>>> option redispatch >>>> maxconn 65536 >>>> timeout connect 5000 >>>> timeout client 50000 >>>> timeout server 50000 >>>> >>>> #listen haproxy 192.168.122.112:80 >>>> listen haproxy *:80 >>>> mode http >>>> stats enable >>>> stats auth someuser:somepassword >>>> balance roundrobin >>>> option prefer-last-server >>>> option forwardfor >>>> option httpchk HEAD /check.txt HTTP/1.0 >>>> >>> >> Check if the above health check is really working, you show that >> requesting the root page works but we don't see you checking the /check.txt >> file (does it exist at all?). Run: >> >> $ curl --http1.0 -X HEAD 192.168.122.101:80 <http://192.168.122.101/> >> /check.txt >> $ curl --http1.0 -X HEAD 192.168.122.102:80 <http://192.168.122.101/> >> /check.txt >> >> from the HAP server. >> >> server nginx-1 192.168.122.101:80 check >>>> server nginx-2 192.168.122.102:80 check >>>> >>>> BTW, I could not use "listen haproxy 192.168.122.112:80", but had to >>>> use *:80 >>>> as haproxy does not start up with the former. It seems like haproxy >>>> startup is >>>> happening ahead of networking. >>>> ______________________________________________________ >>>> >>>> I also stopped/restarted haproxy, but I still get the same error at >>>> start. >>>> >>>> root@haproxy-2:~# netstat -apn | grep :80 >>>> tcp 0 0 0.0.0.0:80 0.0.0.0:* >>>> LISTEN 3558/haproxy >>>> _______________________________________________________________ >>>> From outside haproxy, I can do a wget/curl" to either of the two >>>> servers: >>>> >>>> # wget 192.168.122.101:80 >>>> --2015-04-07 10:42:28-- http://192.168.122.101/ >>>> Connecting to 192.168.122.101:80... connected. >>>> HTTP request sent, awaiting response... 200 OK >>>> Length: 867 [text/html] >>>> Saving to: `index.html' >>>> >>>> 100%[======================================>] 867 --.-K/s in >>>> 0s >>>> >>>> 2015-04-07 10:42:28 (104 MB/s) - `index.html' saved [867/867] >>>> _______________________________________________________________ >>>> >>>> And I can do the same from haproxy: >>>> root@haproxy-2:~# wget 192.168.122.101 >>>> --2015-04-07 10:43:48-- http://192.168.122.101/ >>>> Connecting to 192.168.122.101:80... connected. >>>> HTTP request sent, awaiting response... 200 OK >>>> Length: 867 [text/html] >>>> Saving to: `index.html' >>>> >>>> 100%[======================================>] 867 --.-K/s in >>>> 0s >>>> >>>> 2015-04-07 10:43:48 (80.3 MB/s) - `index.html' saved [867/867] >>>> _______________________________________________________________ >>>> >>>> How do I fix this problem? >>>> >>>> Thank you, >>>> - KK >>>> >>> >>> >> > -- Igor Cicimov | DevOps p. +61 (0) 433 078 728 e. ig...@encompasscorporation.com <http://encompasscorporation.com/> w*.* encompasscorporation.com a. Level 4, 65 York Street, Sydney 2000 -- Igor Cicimov | DevOps p. +61 (0) 433 078 728 e. ig...@encompasscorporation.com <http://encompasscorporation.com/> w*.* encompasscorporation.com a. Level 4, 65 York Street, Sydney 2000
