Use MAAS with Juju

MAAS treats physical servers (or KVM guests) as a public cloud treats cloud instances. From the website:

Self-service, remote installation of Windows, CentOS, ESXi and Ubuntu on real servers turns your data centre into a bare-metal cloud.

This page covers the following topics:

  1. Add a MAAS cloud
  2. Add a credential
  3. Bootstrap a controller

1. Adding a MAAS cloud

There are two methods to define a cloud for Juju.

A. Use an interactive prompt
B. Define a YAML file and provide that to Juju as a command-line argument

Both methods make use of the juju add-cloud command. You will need to supply a name you wish to call your cloud and the unique MAAS API endpoint.

To access detailed help about all of its options, use this command:

juju help add-cloud

What does --local do?

Using the --local option instructs Juju to store the cloud definition on the machine that you’re executing the command from.

Omitting it will store the cloud definition on the controller machine. This enables controllers to control models on multiple clouds, but isn’t recommended while you are creating your first model.

A. Using an interactive prompt

Using the add-cloud command without providing its name or an API endpoint will begin an interactive session.

juju add-cloud --local

Example user session specifying maas-cloud as the cloud name and http://10.55.60.29:5240/MAAS as its API endpoint :

Cloud Types
  lxd
  maas
  manual
  openstack
  vsphere

Select cloud type: maas

Enter a name for your maas cloud: maas-cloud

Enter the API endpoint url: http://10.55.60.29:5240/MAAS

Cloud "maas-cloud" successfully added

You will need to add credentials for this cloud (`juju add-credential maas-cloud`)
before creating a controller (`juju bootstrap maas-cloud`).

We’ve called the new cloud maas-cloud and used an endpoint of http://10.55.60.29:5240/MAAS.

B. Manually adding MAAS clouds

The manual method makes use of configuration files defined in YAML. To define a configuration file that mimics the parameters provided by the interactive example, use this:

clouds:         # clouds key is required.
  maas-cloud:   # cloud's name
    type: maas
    auth-types: [oauth1]
    endpoint: http://10.55.60.29:5240/MAAS

Assuming that we’ve saved this YAML snippet as maas-cloud.yaml, adding it to Juju looks like this:

juju add-cloud --local maas-cloud maas-cloud.yaml

Adding multiple clouds from the same file

A single configuration file can define multiple clouds. They can be loaded into Juju one at a time.

Here is an example defines that three MAAS clouds, devmaas, testmaas and prodmaas:

clouds:
  devmaas:
    type: maas
    auth-types: [oauth1]
    endpoint: http://devmaas/MAAS
  testmaas:
    type: maas
    auth-types: [oauth1]
    endpoint: http://172.18.42.10/MAAS
  prodmaas:
    type: maas
    auth-types: [oauth1]
    endpoint: http://prodmaas/MAAS

To add clouds devmaas and prodmaas, assuming the configuration file is maas-clouds.yaml in the current directory, we would run:

juju add-cloud --local devmaas maas-clouds.yaml
juju add-cloud --local testmaas maas-clouds.yaml
juju add-cloud --local prodmaas maas-clouds.yaml

See the Adding clouds manually page for further information.

Confirm that you’ve added the cloud correctly

Ask Juju to report the clouds that it has registered:

juju clouds --local

2. Adding credentials

Use the add-credential command to interactively add your credentials to the new cloud:

juju add-credential maas-cloud

Example user session:

Enter credential name: maas-cloud-creds

Using auth-type "oauth1".

Enter maas-oauth:

Credentials added for cloud maas-cloud.

We’ve called the new credential ‘maas-cloud-creds’. When prompted for ‘maas-oauth’, you should paste your MAAS API key. It will not be echoed back to the screen.

The MAAS API key can be found on your user preferences page in the MAAS web UI, or by using the MAAS CLI, providing you have sudo access:

sudo maas apikey --username=<username>

For more information about credentials, read through the Credentials page.

Confirm that you’ve added the credential correctly

To view the credentials that Juju knows about, use the credentials command and inspect both remote and locally stored credentials:

juju credentials
juju credentials --local

3. Creating a controller

You are now ready to create a Juju controller for maas-cloud:

juju bootstrap maas-cloud

MAAS will allocate a node from its pool to run the controller on.

For a detailed explanation and examples of the bootstrap command see the Creating a controller and Configuring Controllers pages.


Last updated 3 months ago.