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# Ohai Release Notes:

### Virtualization

Chained virtualization systems, such as containers running on virtual machines, can now be tracked in
node[:virtualization][:systems]. This is in addition to the former system under node[:virtualization][:role] and
node[:virtualization][:system]. For example, a node could have all of these attributes at once:

```
node[:virtualization][:system] = "vmware"
node[:virtualization][:role] = "guest"
node[:virtualization][:systems][:lxc] = "host"
node[:virtualization][:systems][:vmware] = "guest"
```

Due to the requirements for being an LXC host being easily fulfilled, we only
populate the old system (role & system) with LXC if there are no other virtualization systems detected.

### Miscellaneous

* Ohai now collects mdadm RAID information.

# Ohai Breaking Changes: