# Required services and supported regions

## Required services

The AWS region must support the following services used in WEKA on AWS.

* AWS EC2 Instances
* AWS Lambda
* AWS Step Functions
* AWS CloudWatch event rule 
* AWS S3 (required for snap/tiering to object)

## Supported regions

| Code           | Name                      |
| -------------- | ------------------------- |
| us-east-1      | US East (N. Virginia)     |
| us-east-2      | US East (Ohio)            |
| us-west-1      | US West (N. California)   |
| us-west-2      | US West (Oregon)          |
| ap-south-1     | Asia Pacific (Mumbai)     |
| ap-northeast-1 | Asia Pacific (Tokyo)      |
| ap-northeast-2 | Asia Pacific (Seoul)      |
| ap-southeast-1 | Asia Pacific (Singapore)  |
| ap-southeast-2 | Asia Pacific (Sydney)     |
| ca-central-1   | Canada (Central)          |
| eu-central-1   | Europe (Frankfurt)        |
| eu-north-1     | Europe (Stockholm)        |
| eu-west-1      | Europe (Ireland)          |
| eu-west-2      | Europe (London)           |
| sa-east-1      | South America (São Paulo) |

**Related topic**

[supported-ec2-instance-types](https://docs.weka.io/4.4/planning-and-installation/aws/weka-installation-on-aws-using-terraform/supported-ec2-instance-types "mention")

**Related information**

[Regions and Zones](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-regions)