Thanks Simon, I forgot entirely about quiescence...
On 20 June 2014 02:06, Simon Horman <ho...@verge.net.au> wrote: > Hi, > > On Thu, Jun 19, 2014 at 06:20:02PM +0100, Aaron West wrote: > > Hi Ilo, > > > > To my knowledge a real server failing a health check done by an agent > such > > as ldirectord/keepalived is pulled from the LVS table. > > > > This will break any established connections to this server. A new > > connection should then start on a remaining live server on the next > > click/refresh for something like a web application or next connection > retry > > for something else. > > It is possible, though not necessarily desirable, to avoid breaking > existing connections by using quiescence. On the LVS side this is > implemented by setting a server weight to zero, which allows existing > connections to continue but prevents new connections from being > "scheduled". > > This is exposed in ldirectord as a quiescence setting by which > it sets the weight of a real-server to zero rather than removing > it in the case where its health check fails. > > I am not familiar with keepalived but I suspect it has a similar feature. > > > How this affects your app/users depends on your application design, > mostly > > HTTP sessions would be fine while things like RDP/SSH/HTTPS would require > > you to reconnect/re-authenticate. > > > > Regards > > > > Aaron West > > > > > > On 19 June 2014 16:42, Ilo Lorusso <i...@bankservafrica.com> wrote: > > > > > Hi , > > > > > > > > > I have a general question of how ldirectord works, I have setup my > > > virtual service and real servers > > > > > > I have an active connection and traffic is flowing through to the real > > > server perfectly as shown below > > > > > > > > > I want to know is it possible to move an established connection between > > > the real servers without resetting or reestablishing the TCP > connection ? > > > > > > [root@lbmaster ~]# ipvsadm -Ln > > > IP Virtual Server version 1.2.1 (size=32768) > > > Prot LocalAddress:Port Scheduler Flags > > > -> RemoteAddress:Port Forward Weight ActiveConn InActConn > > > TCP 172.16.162.190:40054 wlc persistent 300 > > > -> 172.16.162.199:40054 Masq 100 1 0 > > > -> 172.16.162.200:40054 Masq 99 0 0 > > > > > > BankservAfrica is a BBBEE level 4 procurement contributor > > > > > > This e-mail and its attachments, if any, are subject to > BankservAfrica's > > > e-mail disclaimer which is available on > > > http://www.bankservafrica.com/Contactus/EmailDisclaimer.aspx > > > > > > Please consider the environment before printing this e-mail! > > > _______________________________________________ > > > 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 > > > > > _______________________________________________ > > 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 > > > _______________________________________________ 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
