AWS

AWS is Amazon's cloud computing platform.

Regions

Regions are collections of resources in a geographic area. They're isolated and independent of one another, except where replication makes resources available across a boundary.

Regions introduced before 20th March 2019 are enabled by default, and cannot be disabled. Other regions can be enabled via the Console.

Quotas

Quotas are hard limits beyond which an account can't provision additional resources. They're usually region-specific.

Some quotas can't be increased.

Tagging

Resources can be tagged with metadata that can make them easier to locate, in key-value pairs AWS calls tags. Tags make it easier to manage, identify, organise, search for and filter resources.

Consider tagging by:

Owner
Environment
Purpose
Application
Stack
Operating System

Resource groups

AWS resource groups allow grouping related resources into a structure for easier bulk operations.

Not all services support resource groups.

ARNs

Amazon Resource Names uniquely identify resources. They're in the following format:

arn:partition:service:region:account-id:resource-id
arn:partition:service:region:account-id:resource-type:resource-id
arn:partition:service:region:account-id:resource-type/resource-id

And are comprised of:

partition describes the group of regions in which the account exists:
- aws - AWS consumer regions,
- aws-cn - AWS China consumer regions.
- aws-us-gov - AWS GovCloud regions.
service - identifies the service, e.g. s3.
region contains the region name.
account-id contains the owning AWS account ID.
resource-type define subtypes within a service; treat these as opaque.
resource-id is the resource-specific section of the identifier, and may contain a path.

If resource-id is a path, wildcards (*) can be used to match segments, but not subsegments.

Clients

Services

AWS is broken up into a number of services, most with regional availability. AWS services are generally accessible via service endpoints of the form:

protocol:service-code.region-code.amazonaws.com

Global services (services that aren't regional) will omit the region-code segment.

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