![]() NOTE: To simplify the architecture the before mentioned accounts can be consolidated in only 1 account. security-audit-logging-acct (centralized account to have centralized logs like cloudtrail, vpc-flow-logs, alb and cloudfront access logs, among others, centralized firewall manager setup, or any other AWS service or sec&audit tool).user-mgmt-acct (centralized iam roles based cross-org approach - iam roles per accout to be assumed still needed).This applies for EC2 & RDS ( ), for S3 versioning and multi-region replication it's recommendedīased on the before presented let's present our reference architecture. ![]() And for Dev/Qa/Stg (can be consolidated in a single account for cost efficiency) and have at least 2 private and 2 public subnets in different AZs. Or should we use separate subnets for web severs/database servers/management-administration type servers? To get the desired multi-az deploying for Production Grade environments at least 3 Private Subnets (through a redundant AWS Nat-GW - at least 2 of them in different az) and 3 Public Subnets (through Internet GW) of course each one in a separate AZ. For multi-region architecture please consider: ģ) Separate subnets per environment. If because of compliance frameworks you still need a Multi-Region active-active method: Then by architecting multi region applications and using DNS to balance between them in normal production status, you can adjust the DNS weighting and send all traffic to the AWS region that is available, this can even be performed automatically with Route53 or other DNS services that provide health check mechanisms as well as load balancing. durability: 99.999999999% (depends on the storage class).AWS will use commercially reasonable efforts to make the Included Services each available for each AWS region with a Monthly Uptime Percentage of at least 99.99%.So for as hosting our HA Apps in a region but within isolated locations (datacenters) it's enough referening to the per region AWS SLA of: Each Region has multiple, isolated locations known as Availability Zones Each Region is a separate geographic area. These locations are composed of Regions and Availability Zones. Let's consider the following info to evaluate if multi-region is also needed.Īs defined in the official doc -> Amazon EC2 is hosted in multiple locations world-wide. DNS Route53 private hosted zones association / sharing:.Keep in mind choosing your region evaluation both network performance (latency - ) and costs (N.Virginia-us-east-1, Ohio-us-east-2, Orego-us-west-2 - ). ![]() In our case having one VPC in a certain region it's enough since for High-Availability, Self-healing, Redundancy and Resilience we use a multi-availability-zone (multi-az) configuration (eg: us-east-1a, us-east-1b and us-east-1c, will be extended in 3). Since we assume we're going to implement multi-account AWS Org approach then will have at least 1 VCP per account x environment. #Pritunl aws cost how to
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