AWS

The environments are hosted on AWS where they are built using Cloudformation templates and CDK code. Each environment consists multiple stack, templates for these are available in https://github.com/6aika/sixodp-infra and https://github.com/6aika/sixodp/tree/master/cdk.

Database stack

The database stack contains components with irreplaceable data. If the stack is destroyed, the data is lost. The stack contains the following resources:

• Dataset bucket (S3)

• Policies of dataset bucket

The stack takes the following parameters:

• Environment name (pre-defined list)

The stack outputs following parameters:

• Dataset bucket

CDK based stacks

Rest of the stacks are built using cdk and contains following components:

• Route53 zone for DNS

• WAF firefall for managing access to VPC network

• Load balancer to manage access to multiple web server

• Nat gateway for access to the internet

• 1-2 web servers depending on configuration, these host wordpress and ckan

• Background server for backgound processes like crontab, solr and redis

• 2 databases: Mysql for wordpress and postgresql for ckan

• Image files are hosted in EFS and dataset files in S3

The stacks are also depicted on the following figure:

Additionally to the stacks, each application stack requires access to secrets S3 bucket which is configured within the stack template.