Commission Nodes

Once a node is added to MAAS (see Add nodes) the next logical step is to commission it.

To commission, the underlying machine needs to be configured to netboot (this should already have been done during the enlistment stage). Such a machine will undergo the following process:

  1. DHCP server is contacted
  2. kernel and initrd are received over TFTP
  3. machine boots
  4. initrd mounts a Squashfs image ephemerally over iSCSI
  5. cloud-init runs commissioning scripts
  6. machine shuts down

The commissioning scripts will talk to the region API server to ensure that everything is in order and that eventual deployment will succeed.

The image used is, by default, the latest Ubuntu LTS release and should not require changing. However, it can be configured in the web UI in the 'Settings' page.

To commission, on the 'Nodes' page, select a node and choose 'Commission' under the 'Take action' dropdown menu (orange button).

commission

You have the option of selecting some extra parameters (checkboxes). Then finalize the directive by hitting 'Go'.

commission go

Finalize the directive by hitting 'Commission machine'.

While a node is commissioning its status will change to Commissioning. During this time the node's network topology will be discovered. This will prompt one of the node's network interfaces to be connected to the fabric, VLAN, and subnet combination that will allow it to be configured. By default, a static IP address will be assigned out of the reserved IP range for the subnet. That is, an IP assignment mode of 'Auto assign' will be used. See the next section for details on assignment modes.

See MAAS CLI for how to commission a node with the CLI.

Note: If your node has more than one network interface you may need to tell MAAS which one to use. Do this by marking it Broken (see next section).

Once a node is commissioned its status will change to Ready. Consider taking this time to tag your node (see Tags).

The next step will be to deploy it. See Deploy nodes.

Post-commission configuration

Once a node has been commissioned, its network interface(s) can be configured. Specifically, when a node's status is either 'Ready' or 'Broken', interfaces can be added/removed, attached to a fabric and linked to a subnet, and provided an IP assignment mode. Tags can also be assigned to specific network interfaces (see Tags for network interfaces).

node interface

There are four modes to choose from that determine how an address on the subnet gets assigned when the node is eventually deployed:

  • Auto assign MAAS will assign a random static address (iface eth0 inet static) from among the addresses that do not fall within a reserved dynamic range or a reserved range.

  • Static assign The administrator will specify a static address using a secondary field.

  • DHCP A dynamic address will be leased via either MAAS-managed DHCP or an external DHCP server.

  • Unconfigured The interface will be left unconfigured.

See Concepts and terms for the definitions of reserved range types used in MAAS.

Bridge interfaces

MAAS supports the creation of a bridge interface from a single network interface. This may be useful if you eventually deploy virtual machines or containers on the machine.

A bridge is created by first selecting a single interface followed by clicking the now-enabled 'Create bridge' button. A new pane will appear where you can enter a MAC address for the bridge, an optional STP forward delay, and a tag.

bridge interface

Automatic bridge creation on all configured interfaces can also be performed at allocation time using the API.