> On 31 Oct 2017, at 12:17, Bastian Blank <[email protected]> wrote: > > Hi Johan > > On Mon, Oct 30, 2017 at 01:27:50PM +0000, Johan Wassberg wrote: >>> If you load balance behind a single name, is there any way you can >>> ensure that all instances provide the same content? >> Yes, the service is load balanced between two hosts. I didn't thought >> that should be a problem. > > It's no problem. We just flag that as irregularities as the contents > are not the same, even if almost the same. > >> How do you normally handle this kind of issues? > > Each backend system gets it's own mirror name configured in > ftpsync.conf. The backends can be reached directly. How they can be > reached is not important; we have the following mechanisms in the wild: > - The mirrors have public IP on their own and can be reached using it, > - the load balancer exposes the systems directly by name, and > - the load balancer exposes the systems by using different ports. > > We will add entries for each backend to our internal mirror list and > make the public name an alias. We then check each system seperately, so > we can asses the health of each one. For examples see: > https://mirror-master.debian.org/status/mirror-status.html#&sort[results]=0-0&filter[results]=azure.com-------- > https://mirror-master.debian.org/status/mirror-status.html#&sort[results]=0-0&filter[results]=kernel.org-------- > > Depending on the importance of the mirror we have a bunch of other > things we use to make sure they are in sync, but this does not need to > concern you. > >> 2. Allow http access directly to the machines without the load balancer. > > For now we would like to start with this one. You have to select names > for both mirrors and ways to access them. Currently the backends are > named mirror-prod-debian0[12].it.su.se and are published in DNS with > public IP. So you could set MIRRORNAME in ftpsync.conf to that hostname > and allow access to the IP from the outside.
Done. The two hosts that serves "debian.mirror.it.su.se" is now accessable from anywhere and the MIRRORNAME is set correctly. mirror-prod-debian01.it.su.se mirror-prod-debian02.it.su.se Please updated your internal tools. -- jocar
