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.

commission

You have the option of selecting some extra parameters (checkboxes) and performing hardware tests (see Hardware testing).

confirm commission

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.

Once a node is commissioned its status will change to Ready and an extra tab for the node called 'Commissioning' will become available. This tab contains the results of the scripts executed during the commissioning process.

Now that the node is commissioned you may consider creating or applying a tag (see Tags for more on this).

The next step will be to deploy the node. 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).

Click the pencil icon for the interface to be edited:

edit interface

The following window will appear:

configure 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). The pool of available addresses depends on whether the subnet is managed or unmanaged (see Subnet management).

  • 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 and MAAS CLI - advanced tasks for changing the mode with the CLI.

Press the 'Save' button to apply the changes.

Bridge interfaces

A bridge is created by selecting an interface and clicking the now-active 'Create bridge' button. A form will appear that will allow a MAC address, STP, and a tag to be configured.

configure bridge

Press the 'Save' button when you're done.

Pro tip: A network bridge may be useful if virtual machines or containers are to be put on the node.