This guide shows you how to manage workloads on Amazon AWS.
Contents:
Add cloud
Juju already has knowledge of the AWS cloud, which means you don’t need to add it explicitly. You should be able to see it already when you run:
juju clouds --all
Add credentials
There are multiple methods for adding security credentials to Juju. Each process will require two fields from the CSV file that you downloaded from the AWS user account (Hyphens indicate that the field is unnecessary).
-,-,<access-key>,<secret-key>,-
Alternately, you can use your credentials with Juju as a Service, where charms can be deployed within a graphical environment that comes equipped with a ready-made controller.
Use the interactive method
Credentials can be added with the juju add-credential command:
juju add-credential aws
An example session:
Enter credential name: jlaurin
Using auth-type "access-key".
Enter access-key: AKIAIFII5EH5FOCYZJMA
Enter secret-key: ******************************
Credential "jlaurin" added locally for cloud "aws".
Use a YAML file
A YAML-formatted file, say mycreds.yaml, can be used to store credential information for any cloud. This information is then added to Juju by pointing the add-credential command to the file:
juju add-credential aws -f mycreds.yaml
See Juju | Credential for guidance on what such a file looks like.
Use environment variables
With AWS you have the option of adding credentials using the following environment variables that may already be present (and set) on your client system:
AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY
Add this credential information to Juju in this way:
juju autoload-credentials
For any found credentials you will be asked which ones to use and what name to store them under.
On Linux systems, files $HOME/.aws/credentials and $HOME/.aws/config may be used to define these variables and are parsed by the above command as part of the scanning process.
For background information on this method read section Adding credentials from environment variables.
Create a controller
You are now ready to create a Juju controller for cloud ‘aws’:
juju bootstrap aws aws-controller
Above, the name given to the new controller is ‘aws-controller’. AWS will provision an instance to run the controller on.
For a detailed explanation and examples of the bootstrap command see the Creating a controller page.
AWS-specific features
Awareness of regions and instance types
Juju contains built-in knowledge of AWS regions, instance types and their capabilities.
juju show-cloud --local aws
Replacing the --local option with --controller to report regions known to a controller.
Use juju update-public-clouds to update Juju’s knowledge of new AWS regions as they are available.
Custom tags
Consistent naming, tagging, and the ability to add user-controlled tags to created instances. See Instance naming and tagging for more information.
Instance type selection
Juju’s default AWS instance type is m3.medium. A different type can be selected via a constraint: juju add-machine --constraints 'instance-type=t2.medium'. For more information see Constraints. You can also view the list of Amazon EC2 instance types.
Support for Virtual Private Cloud (VPC) functionality
A controller can be placed in a specific virtual private cloud (VPC). See Passing a cloud-specific setting for instructions.
Important note for AWS accounts created before 2013-12-04: These accounts do not have a default VPC. Juju may select a much larger instance type than what is required. To remedy this, create a default VPC for your AWS account.
Next steps
A controller is created with two models - the ‘controller’ model, which should be reserved for Juju’s internal operations, and a model named ‘default’, which can be used for deploying user workloads.
See these pages for ideas on what to do next: