Hi Tim, You can use whatever nodes as seed nodes, except for when you start up a fresh cluster from scratch. When you start a node you can use the AWS API to discover other EC2 instances and use all or a few as seed nodes.
The special case is when starting a new cluster, and then I imagine that you can mark one node as special using AWS metadata, or a special argument in the start script. This special node must put itself first in the list of seed nodes. In all other cases a node should not include itself as seed node. The reason for the special first seed node is to avoid creating several separate clusters when starting from an empty cluster. I would be interested in understanding why this would not be feasible solution. Cheers, Patrik On Tue, Feb 11, 2014 at 7:20 PM, Timothy Perrett <[email protected]>wrote: > Hey Roland - doesnt "always on" sound like "will never fail"... ? I > wouldn't be comfortable manually managing that cluster, so it would need an > ASG, which in turn will remove the oldest node when shrinking, so over time > you'd end up loosing all your original seed nodes if your cluster is > expanding and contracting enough. > > > > On Sunday, 9 February 2014 23:35:20 UTC-8, rkuhn wrote: > >> Hi Tim, >> >> you could have one small group which is always on and acts as entry point >> (seed nodes) while the rest are auto-scaling. Would that solve the issue? >> >> Regards, >> >> Roland >> >> 6 feb 2014 kl. 23:12 skrev Timothy Perrett <[email protected]>: >> >> Scott, >> >> What did you ever end up doing about this? As yet, I have not seen any >> decent story for auto-scalling akka-cluster on AWS; it strikes me that over >> a long enough period all the seed nodes could be reaped by the ASG, but >> that there would be enough folks wanting to do this that there would be a >> decent solution for it. >> >> Cheers >> >> Tim >> >> On Thursday, 24 October 2013 01:09:08 UTC-7, Patrik Nordwall wrote: >>> >>> Hi Scott, >>> >>> Using the AWS API together with Cluster(system).joinSeedNodes should be >>> possible. The first seed node must be marked somehow. >>> >>> From docs: >>> You may also use Cluster(system).joinSeedNodes, which is attractive when >>> dynamically discovering other nodes at startup by using some external tool >>> or API. When using joinSeedNodes you should not include the node itself >>> except for the node that is supposed to be the first seed node, and that >>> should be placed first in parameter to joinSeedNodes. >>> >>> Regards, >>> Patrik >>> >>> >>> >>> On Tue, Oct 22, 2013 at 1:36 AM, Ryan Tanner <[email protected]> wrote: >>> >>>> We have Vagrant auto-update the hosts file over ssh. Kinda clunky but >>>> it works for small clusters. >>>> >>>> >>>> On Monday, October 21, 2013 4:58:36 PM UTC-5, Scott Clasen wrote: >>>>> >>>>> Anyone have good tricks for standing up an akka cluster on ec2 WRT >>>>> seed nodes? >>>>> >>>>> Would like to be able to auto scale it so not having to manually join >>>>> a node is necessary. >>>>> >>>>> Could use elastic IPs would rather not. Could maybe use a tcb elb? not >>>>> sure that would work, would rather not. >>>>> >>>>> Guess I can use ZK which I already have stood up...what weird things >>>>> can happen if a node attempts to join a cluster via a seed that has been >>>>> partitioned away from the cluster? >>>>> >>>>> >>>>> >>>> -- >>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>> >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >>>> >>>>>>>>>> Search the archives: https://groups.google.com/ >>>> group/akka-user >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Akka User List" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/akka-user. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> >>> >>> -- >>> >>> Patrik Nordwall >>> Typesafe <http://typesafe.com/> - Reactive apps on the JVM >>> Twitter: @patriknw >>> >>> >> -- >> >>>>>>>>>> Read the docs: http://akka.io/docs/ >> >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user >> --- >> You received this message because you are subscribed to the Google Groups >> "Akka User List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> >> >> *Dr. Roland Kuhn* >> *Akka Tech Lead* >> Typesafe <http://typesafe.com/> - Reactive apps on the JVM. >> twitter: @rolandkuhn >> <http://twitter.com/#!/rolandkuhn> >> >> -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ > >>>>>>>>>> Check the FAQ: http://akka.io/faq/ > >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/groups/opt_out. > -- Patrik Nordwall Typesafe <http://typesafe.com/> - Reactive apps on the JVM Twitter: @patriknw -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. 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