[[chapter_module_utilities]]

// ################################################ CAPITOLO 4 ################################################
// ################################################ MODULI ################################################

// ################################################ UTILITIES ################################################

= Utilities

//  Disk Status

== Disk Status

Monitor all the disks in your cluster in one screen. Keep track of performance.

Requirement on every nodes **ledmon**.
```sh
apt-get install ledmon
```

=== Nodes === 

[.thumb]
image:screenshot/modules/disks-status/nodes.png[]

=== Disks Information ===

[.thumb]
image:screenshot/modules/disks-status/disks.png[]


=== S.M.A.R.T. tools information ===

[.thumb]
image:screenshot/modules/disks-status/disks.png[]


//  NODE FREE MEMORY

== Node Free Memory

Free up the node's memory space in case of error: "out of memory" or "kvm: failed to initialize KVM: Cannot allocate memory"

=== Description ===
----
Free the memory of the nodes to start a VM without using a shell.

The message that is displayed
----

WARNING: _"kvm: failed to initialize KVM: Cannot allocate memory"_

=== General ===

[.thumb]
image:screenshot/modules/node-free-memory/nodes.png[]


//  VM UNLOCK

== VM UNLOCK ==

Unlock VM/CT that have remained in the "locked" status

=== Description ===
----
Unlock VM/CT that are in a locked state without using the shell
----

=== General ===

[.thumb]
image:screenshot/modules/vm-unlock/vms.png[]