- **status**: assigned --> accepted
---
** [tickets:#2509] osaf: Support self scale-out**
**Status:** accepted
**Milestone:** 5.17.10
**Created:** Wed Jun 21, 2017 09:23 AM UTC by Anders Widell
**Last Updated:** Sat Jul 01, 2017 04:15 PM UTC
**Owner:** Anders Widell
Ticket [#1453] added support for scale-out, which allows scale-out from an
initial cluster containing at least one node. This ticket add support for
scaling out from a cluster containing zero nodes, or alternatively, a cluster
where the active node is not a configured node. The use cases are as follows:
* Support loading a backup that was created on a different cluster where none
of the new nodes have the same name as any of the nodes in the old cluster.
* Support cluster restart on a system where nodes don't have persistent local
storage (or persistent host names / node names) - i.e. a system where a node
reboot will always cause a scale-in followed by a scale-out
* Make scaling more robust, e.g. imagine a case when a one-node cluster is
scaled out by adding a second node, but then the original node is removed
before scale-out of the new node has completed.
One possible solution is that when a node boots up and becomes the newly
elected active system controller (i.e. the first active system controller after
a cluster restart), it will check if the node itself exists as a configured
node in the IMM database. If it does not, then at first only IMM will be
started and the scale-out script (added in ticket [#1453]) will be called to
scale out the current node. When the current node has added to IMM, the rest of
the OpenSAF services are started.
---
Sent from sourceforge.net because opensaf-tickets@lists.sourceforge.net is
subscribed to https://sourceforge.net/p/opensaf/tickets/
To unsubscribe from further messages, a project admin can change settings at
https://sourceforge.net/p/opensaf/admin/tickets/options. Or, if this is a
mailing list, you can unsubscribe from the mailing list.
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Opensaf-tickets mailing list
Opensaf-tickets@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/opensaf-tickets
