The Amazon EC2 cloud and Juju

List of supported clouds > Amazon EC2

This document describes details specific to using your existing Amazon EC2 cloud with Juju.

See more: Amazon EC2

When using the Amazon EC2 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 in Juju

As the differences related to (1) are already documented generically in our Tutorial, How-to guides, and Reference docs, here we record just those that follow from (2).

Juju points of variation Notes for the Amazon EC2 cloud
setup (chronological order):
CLOUD
requirements: TBA
definition: :information_source: Juju automatically defines a cloud of this type.
- name: aws or user-defined
- type: ec2
- authentication types: [access-key, secret-key]
- regions: [TO BE ADDED]
- cloud-specific model configuration keys: vpc-id (string)
Sets a specific AWS VPC ID. Optional. When not specified, Juju requires a default VPC or EC2-Classic features to be available for the account/region. :warning: If your AWS account was created before 04-12-2013: Your account does not have a default VPC. As a result, Juju may select a much larger instance type than what is required. To remedy this, create a default VPC.

vpc-id-force (boolean)
Forces Juju to use the AWS VPC ID specified with vpc-id, when it fails the minimum validation criteria. :warning: Not accepted without vpc-id.

CREDENTIAL
definition: auth-type: access-key, which requires you to provide your access key and your secret key. See more: Amazon | AWS security credentials

If you want to use a YAML file:

credentials:
aws:
  <user-defined credential name>:
   auth-type: access-key
   access-key: <key>
   secret-key: <key>

If you want to use environment variables:

AWS_ACCESS_KEY_ID="<id>"

AWS_SECRET_KEY_ID="<id>"

CONTROLLER
notes on bootstrap: You can use AWS Instance Profiles for your controller machines by passing your instance profile as a bootstrap constraint: juju bootstrap --bootstrap-constraints="instance-role=<my instance profile>". See more: Using AWS instance profiles with Juju.
other (alphabetical order:)
CONSTRAINT
conflicting: [instance-type] vs. [cores, cpu-power, mem]
supported?
- allocate-public-ip :white_check_mark:
- arch :white_check_mark:
- container :white_check_mark:
- cores :white_check_mark:
- cpu-power :white_check_mark:
- image-id :white_check_mark: (Starting with Juju 3.3)
Type: String.
Valid values: An AMI.
- instance-role :white_check_mark:
Value: An instance profile name.
- instance-type :white_check_mark:
Valid values: See cloud provider.
Default value: m3.medium.
- mem :white_check_mark:
- root-disk :white_check_mark:
- root-disk-source :white_check_mark:
- spaces :white_check_mark:
- tags :x:
- virt-type :x:
- zones :white_check_mark:
PLACEMENT DIRECTIVE
<machine> :white_check_mark:
subnet=... :white_check_mark:
system-id=... :negative_squared_cross_mark:
zone=... :white_check_mark:
If the query looks like a CIDR, then this will match subnets with the same CIDR. If it follows the syntax of a “subnet-XXXX”, this will match the Subnet ID. Everything else is just matched as a Name.
RESOURCE (cloud)

Consistent naming, tagging, and the ability to add user-controlled tags to created instances.

:white_check_mark:

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