Akkadian Provisioning supports High Availability using master-master replication. All nodes in HA cluster are active and can process requests, but only the master node will process scheduled requests to avoid task duplication. When using the built-in virtual IP, HA will always direct users to the primary node. If load balancing is required or you are geographical distributing the nodes, you must utilize and external load balancer.
HA Overview:
- HA can only be enabled via the CLI.
- Minimum of 2 nodes is required for an HA cluster.
- Application will be accessed via Virtual IP.
- Built-in VIP can be used within the same layer 2 network.
- External load balancer is required when nodes are on separate layer 3 networks.
Prerequisites for High Availability:
- All nodes have been assigned with a correct IP address.
- All nodes have a FQDN (name.domain.com).
- All nodes should be accessible via DNS.
- All nodes should have DNS configured with the ability to resolve all nodes within the cluster.
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