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observers: Set of hosts to observe the cluster (only the first is considering)
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Hypervisors: Set of machines to hosts VMs.
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Remember that the cluster must contains an odd number of machines. For example three hypervisors or one observer and two hypervisors. |
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Node redundancy
All nodes in the cluster have an access to a shared storage via ceph (see Shared storage section). With it, the cluster is in N to N redundancy mode.
- Corosync will provides messaging and membership services.
- Pacemaker will manage the cluster (synchronize resources between each node).
draw.io Diagram
More details on pacemaker here and corosync here.
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