Unfortunately multiple addresses per host in a host file used to work but was broken in the last HostDB update. I don't think it would be that hard to put back.
On Thu, Oct 18, 2018 at 2:13 PM Aaron Canary <acan...@oath.com.invalid> wrote: > The code parsing and storing the host_file only keeps 1 IpAddr per > hostname. > In order to use proxy.config.hostdb.strict_round_robin, the record must > come through DNS. > > *I am trying to get the same thing working with hostdb since I want to > > avoid DNS round trip because my IPs are fairly fixed.* > > You could try setting a long ttl (like 5 minutes) on your DNS response > record, which will cause HostDB to cache the IP record for that long. DNS > is not repeated until that HostDB record is expired. > > If you don't have control of the DNS ttl, then you can override it with > something like > > # set minimum IP ttl to 10 seconds > proxy.config.hostdb.ttl_mode INT 3 > proxy.config.hostdb.timeout INT 10 > > > > https://docs.trafficserver.apache.org/en/8.0.x/admin-guide/files/records.config.en.html?highlight=ttl_mode#proxy.config.hostdb.ttl_mode > > > I hope that helps. > > On Wed, Oct 17, 2018 at 4:15 PM Dk Jack <dnj0...@gmail.com> wrote: > > > Hi, > > I am looking at the hostdb configuration and I need some clarification on > > the configuration. In particular I have questions about these two > > configuration parameters. > > > > proxy.config.hostdb.host_file.path > > proxy.config.hostdb.strict_round_robin > > > > I am trying to understand how hostdb round_robin configuration works. In > my > > setup, I am trying to reach multiple origin servers. I am using the same > > domain name for all my origin servers. In my remap, I am using this name. > > Since each of my origin servers has a different IP, I was hoping to use > the > > strict_round_robing configuration to distribute the load amongst the > origin > > servers. > > > > The documentation for the first says that the format for host_file.path > is > > similar to 'hosts' file. However as per the answers for this query... > > > > > > > https://serverfault.com/questions/429839/assign-multiple-ips-to-1-entry-in-hosts-file > > > > The hosts file doesn't support having multiple IPs for the same domain. > > Does ATS hostdb behave differently i.e. similar to a DNS server. I am > > asking this, because ATS has the hostdb round robin configuration. > > > > BTW, this configuration works with an DNS server with strict round robing > > enabled for my origin server domain. I am trying to get the same thing > > working with hostdb since I want to avoid DNS round trip because my IPs > are > > fairly fixed. > > > > Thanks for the help. > > > > Dk. > > > > > -- > Aaron Canary > ATS - Senior Software Engineer > -- *Beware the fisherman who's casting out his line in to a dried up riverbed.* *Oh don't try to tell him 'cause he won't believe. Throw some bread to the ducks instead.* *It's easier that way. *- Genesis : Duke : VI 25-28
