Hi lvs-users, Extremely sorry for the multiple emails, this email was stuck in the mail queue probably because of moderation (just joined the ML) and I expected it to get dropped so sent a different one.
Please ignore this email and look at another one, that has more clarity with ipvsadm outputs*: * http://lists.graemef.net/pipermail/lvs-users/2019-August/050685.html On Wed, Aug 14, 2019 at 10:50 AM Abhijeet Rastogi <abhijeet.1...@gmail.com> wrote: > Hi everyone, > > I'm investigating a typical configuration for an L4 TCP load balancer > using ipvs+keepalived. Settings:- > > - persistence_timeout: 120 seconds. (# LVS persistence timeout, sec) > - /sbin/ipvsadm --set 1800 120 300 > - persistence_granularity: "48" for ipv6. > - lb_algo: rr (round robin) > > My expectation is, all the IPs from the same /48 v6 subnet should always > reach the same real_server because of setting granularity. > > However, I can see that established connections from the same /48 v6 > subnet are spread across multiple reals. (with timeouts b/w 0 seconds to > less than 30 minutes which is a side-affect of setting higher timeout for > TCP). > > Questions:- > > - After the persistent_timeout expires, do new connections from the > same /48 subnet get assigned to a new reals based on round-robin regardless > of whether we've existing connections already going to a specific real from > that subnet? (And this results in same /48 being distributed to multiple > reals eventually) > - Is TCP timeout the reason for the unexpected spread of same /48 > clients to multiple reals (as opposed to the expectation of 1)? > - If my previous question's answer is yes, should we always set > persistence_timeout to be higher than the TCP timeout? (because of https > traffic, session ticket etc) > > Thanks in advance! > > -- > Cheers, > Abhijeet (https://abhi.host) > -- Cheers, Abhijeet (https://abhi.host) _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
