# The MAAS cloud and Juju This document describes details specific to using your existing MAAS cloud with Juju. > See more: [MAAS](https://maas.io/) When using this cloud with Juju, it is important to keep in mind that it is a (1) machine cloud and (2) not some other cloud. > See more: [Cloud differences](https://documentation.ubuntu.com/juju/2.9/reference/cloud.md#cloud-differences) As the differences related to (1) are already documented generically in the rest of the docs, here we record just those that follow from (2). ## Requirements Starting with `juju v.3.0`, versions of MAAS <2 are no longer supported. ## Notes on `juju add-cloud` Type in Juju: `maas` Name in Juju: User-defined. ## Notes on `juju add-credential` ### Authentication types #### `oauth1` Attributes: - maas-oauth: OAuth/API-key credentials for MAAS (required) #### NOTE `maas-oauth` is your MAAS API key. See more: MAAS | How to add an API key for a user]([https://maas.io/docs/how-to-manage-user-accounts#heading–api-key](https://maas.io/docs/how-to-manage-user-accounts#heading--api-key)) ## Supported constraints | [CONSTRAINT](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint) | | |---------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------| | conflicting: | | | supported? | | | - [allocate-public-ip](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-allocate-public-ip) | ✕ | | - [arch](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-arch) | ✓
Valid values: See cloud provider. | | - [container](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-container) | ✓ | | - [cores](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-cores) | ✓ | | - [cpu-power](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-cpu-power) | ✕ | | - [image-id](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-image-id) | ✓ (Starting with Juju 3.2)
Type: String.
Valid values: An image name from MAAS. | | - [instance-role](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-instance-role) | ✕ | | - [instance-type](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-instance-type) | ✕ | | - [mem](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-mem) | ✓ | | - [root-disk](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-root-disk) | ✓ | | - [root-disk-source](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-root-disk-source) | ✕ | | - [spaces](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-spaces) | ✓ | | - [tags](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-tags) | ✓ | | - [virt-type](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-virt-type) | ✕ | | - [zones](https://documentation.ubuntu.com/juju/2.9/reference/constraint.md#constraint-zones) | ✓ | ## Supported placement directives | [PLACEMENT DIRECTIVE](https://documentation.ubuntu.com/juju/2.9/reference/placement-directive.md#placement-directive) | | |------------------------------------------------------------------------------------------------------|--------------------------------------------------------------| | - [](https://documentation.ubuntu.com/juju/2.9/reference/placement-directive.md#placement-directive-machine) | TBA | | - [subnet=](https://documentation.ubuntu.com/juju/2.9/reference/placement-directive.md#placement-directive-subnet) | ✕ | | - [system-id=](https://documentation.ubuntu.com/juju/2.9/reference/placement-directive.md#placement-directive-system-id) | ✓ | | - [zone=](https://documentation.ubuntu.com/juju/2.9/reference/placement-directive.md#placement-directive-zone) | ✓
If there’s no ‘=’ delimiter, assume it’s a node name. |