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Chapter 9. Investigating HA Compute Nodes
If a compute node fails, Pacemaker attempts to restart the failed services on that node. This includes starting neutron-ovs-agent, then ceilometer-compute, and finally nova-compute. If the failure comes from a Swift ACO node, an attempt to restart the Swift services is done in this order: swift-fs, swift-object, swift-container, and swift-account. Pacemaker will fence the compute node if starting these services fails.
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