Make a small cluster, both nodes and instances.

Checks if a node is "big" enough.

Assigns a new fresh instance to a cluster; this is not allocation, so no resource checks are done.

Checks if an instance is mirrored.

Returns the possible change node types for a disk template.

Check that the cluster score is close to zero for a homogeneous cluster.

Check that cluster stats are sane.

Check that one instance is allocated correctly on an empty cluster, without rebalances needed.

Checks that on a 2-5 node cluster, we can allocate a random instance spec via tiered allocation (whatever the original instance spec), on either one or two nodes. Furthermore, we test that computed allocation statistics are correct.

Helper function to create a cluster with the given range of nodes and allocate an instance on it.

Checks that on a 4-8 node cluster, once we allocate an instance, we can also relocate it.

Helper property checker for the result of a nodeEvac or changeGroup operation.

Checks that on a 4-8 node cluster, once we allocate an instance, we can also node-evacuate it.

Checks that on a 4-8 node cluster with two node groups, once we allocate an instance on the first node group, we can also change its group.

Check that allocating multiple instances on a cluster, then adding an empty node, results in a valid rebalance.

Checks consistency.

For now, we only test that we don't lose instances during the split.

Helper function to check if we can allocate an instance on a given node list. Successful allocation is denoted by Nothing, otherwise the Just value will contain the error message.

Checks that allocation obeys minimum and maximum instance policies. The unittest generates a random node, duplicates it count times, and generates a random instance that can be allocated on this mini-cluster; it then checks that after applying a policy that the instance doesn't fits, the allocation fails.