Hi Thomas, hi Eugen, thank you for the reply.
Is there anywhere a howto to bootstrap such an one node cluster? Best regards Andreas - -----Ursprüngliche Nachricht----- Von: Users <users-boun...@clusterlabs.org> Im Auftrag von Eugen Block Gesendet: Samstag, 2. August 2025 11:18 An: Cluster Labs - All topics related to open-source clustering welcomed <users@clusterlabs.org> Betreff: Re: [ClusterLabs] Creating pacemaker cluster starting with one node Hi, that's how we usually set up our Openstack cluster(s). We bootstrap our first node so we have a single-node pacemaker cluster running all Openstack control services, then "join" the other control nodes, expanding the cluster. I'd recommend to practice in a test cluster, that has helped me a lot! Regards, Eugen Zitat von Tomas Jelinek <tojel...@redhat.com>: > Hi Andreas, > > From the point of view of pcs, pacemaker and corosync, it is possible > to create a one-node cluster, run resources in it, and add another > node afterwards. Obviously, when the single node is lost for whatever > reason, there is no other node to run the resources. > > You should also consider whether the cluster's workload supports this > and what steps are necessary to make it work in this scenario. > > Regards, > Tomas > > > Dne 31. 07. 25 v 8:46 Andreas Mock napsal(a): >> Hi all, >> >> I have to upgrade an old pacemaker cluster consisting of two nodes. >> (There is no chance of rolling update). >> >> Is it possible to create a pacemaker “cluster” starting with only one >> node and afterwards attach the second node? >> >> Best regards >> >> Andreas >> >> >> _______________________________________________ >> Manage your subscription: >> https://lists.clusterlabs.org/mailman/listinfo/users >> >> ClusterLabs home: https://www.clusterlabs.org/ > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/ _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/