Yep that's exactly what I did (looking at my notes): /etc/hosts 54.xxx.xxx.xxx subdomain.mydomain.com subdomain
splitdns.config dest_domain=subdomain.mydomain.com named=127.0.0.1 Now we only need DNS server on the local loop interface which is done by installing dnsmasq. After that the resolv.conf will point to 127.0.0.1: /etc/resolv.conf nameserver 127.0.0.1 search eu-west-1.compute.internal Good point on the proxy.config.http.insert_request_via_str On Wed, Nov 15, 2017 at 10:39 AM, Velusamy, Gandhimathi < [email protected]> wrote: > Hi Igor Cicimov, > > Thanks for your response. > I installed Dnsmasq on the nodes in which traffic server is running and > now everything works fine. I did changes in records.config to make the > traffic server works as transparent proxy and set proxy.config.http.insert_ > request_via_str to 0 to avoid multi hop cycle error. > > Thanks > Gandhimathi > > > > On Nov 14, 2017, at 5:20 PM, Igor Cicimov <[email protected]> > wrote: > > Hi, > > I guess that very much depends on your DNS setup. For example if your ATS > domain name is same as the domain name hosted by the origin servers then > when ATS tries DNS resolution it will get it's own IP. I'm sure this does > not sound very clear so recommend looking at the *splitdns.config* file > and it's documentation for details. > > On Wed, Nov 15, 2017 at 3:02 AM, Velusamy, Gandhimathi < > [email protected]> wrote: > >> Hi, >> I noticed that there is problem with DNS resolution. >> When I send http request directly from the node on which the traffic >> server is installed to the origin server, I am able to receive response >> from the server. That seems the DNS is working. But When I use Traffic >> server, It is giving 502 server not found error. When I debugged with “dns” >> option, it is returns response code 3. >> Does Traffic server need any special DNS mapping. >> >> I first tried with only one level of proxying but unable to do when I use >> hostnames in the remap config. >> It resolves the hostname for traffic server node but the dns resolving >> does not happens for origin servers. WhenI use IP addresses for origin >> servers, the loadbalancer is working. But I need hostnames to be used for >> origin servers in the remap.config when I go hierarchical proxying. >> >> Any pointers on where to look to solve this issue will be appreciated. >> >> Thanks >> Gandhimathi >> >> >> gvelus01@clb:/usr/local$ sudo bin/traffic_server -T "dns" >> traffic_server: using root directory '/usr/local' >> [Nov 14 10:30:56.876] Server {0x7f41b7666780} DEBUG: <DNS.cc >> <http://dns.cc/>:1604 (ink_dns_init)> (dns) ink_dns_init: called with >> init_called = 0 >> [Nov 14 10:30:56.879] Server {0x7f41b7666780} DEBUG: <DNS.cc >> <http://dns.cc/>:247 (dns_init)> (dns) localhost=clb >> [Nov 14 10:30:56.879] Server {0x7f41b7666780} DEBUG: <DNS.cc >> <http://dns.cc/>:248 (dns_init)> (dns) Round-robin nameservers = 1 >> [Nov 14 10:30:56.888] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:482 (startEvent)> (dns) DNSHandler::startEvent: on >> thread 0 >> [Nov 14 10:30:56.888] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:427 (open_con)> (dns) open_con: opening connection >> 10.103.0.1:53 >> [Nov 14 10:30:56.888] Server {0x7f41b3c7d700} DEBUG: <DNSConnection.cc >> <http://dnsconnection.cc/>:143 (connect)> (dns) random port = >> 0.0.0.0:52329 >> [Nov 14 10:30:56.888] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:455 (open_con)> (dns) opening connection 10.103.0.1:53 >> SUCCEEDED for 0 >> [Nov 14 10:30:56.888] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:504 (startEvent)> (dns_pas) opened connection to >> 10.103.0.1:53, n_con = 1 >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1091 (getby)> (dns) received query cs2 type = 1, >> timeout = 0 >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1057 (mainEvent)> (dns) enqueing query cs2 >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1063 (mainEvent)> (dns) adding first to collapsing queue >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:978 (write_dns_event)> (dns) send query (qtype=1) for >> cs2 to fd 21 >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1010 (write_dns_event)> (dns) sent qname = cs2, id = >> 22417, nameserver = 0 >> [Nov 14 10:31:11.913] Server {0x7f41b3c7d700} DEBUG: >> <P_DNSProcessor.h:239 (sent_one)> (dns) sent_one: failover_number for >> resolver 0 is 1 >> [Nov 14 10:31:11.914] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:759 (recv_dns)> (dns) received packet size = 21 >> [Nov 14 10:31:11.914] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:761 (recv_dns)> (dns) round-robin: nameserver 0 DNS >> response code = 0 >> [Nov 14 10:31:11.914] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1306 (dns_process)> (dns) received rcode = 3 >> [Nov 14 10:31:11.914] Server {0x7f41b3c7d700} DEBUG: <DNS.cc >> <http://dns.cc/>:1328 (dns_process)> (dns) DNS error 3 for [cs2] >> >> >> >> On Nov 13, 2017, at 6:16 PM, Velusamy, Gandhimathi < >> [email protected] <[email protected]>> wrote: >> >> Hi, >> >> I am trying to distribute the load balancing between servers connected >> with three proxies. >> >> In my setup, I have three proxy servers and each of them have two origin >> servers and one client. >> I would like to balance the load across servers connected with other >> proxies when the rate of incoming requests are more. >> To begin, I started with round robin policy. >> First I tried to add the proxy2 and proxy 2 as one of the origin servers >> in remap config as below: >> >> map http://UHLB <http://uhlb/> http://UHLB <http://uhlb/> >> @plugin=balancer.so @pparam=--policy=roundrobin @pparam=192.168.20.2 >> @pparam=192.168.30.2 @pparam=192.168.40.2 @pparam=192.168.50.2 >> The last two IP addresses are proxy 2 and proxy3. >> But It did not work. >> I read about parent proxying. But in my case, I want to load balance. May >> I please know to configure to achieve load balancing across hierarchical >> proxies. >> >> Thanks >> Gandhimathi >> >> <PastedGraphic-1.tiff> >> >> >> > > > -- > Igor Cicimov | DevOps > > > p. +61 (0) 433 078 728 > e. [email protected] <http://encompasscorporation.com/> > w*.* www.encompasscorporation.com > a. Level 4, 65 York Street, Sydney 2000 > <https://maps.google.com/?q=Level+4,+65+York+Street,+Sydney+2000&entry=gmail&source=g> > > > -- Igor Cicimov | DevOps p. +61 (0) 433 078 728 e. [email protected] <http://encompasscorporation.com/> w*.* www.encompasscorporation.com a. Level 4, 65 York Street, Sydney 2000
