About Filmstro
Filmstro is a SaaS and desktop application vendor, offering a unique music editing and digital composition service for multimedia producers. This small company has been in existence for approximately 5 years, and hosts a website, proprietary SaaS and audio processing services on AWS. There is also a proprietary desktop application that loads assets from AWS.
The Challenge
Despite being able to service their own requirements in terms of functionality, such as processing and serving assets to the website and desktop application, they were doing so from just a single environment and VPC (production). Resources were deployed into public subnets too, with little understanding of how to privatise these.
Another cause for the engagement was a desire to migrate away from EC2 instances and a heavy reliance on large EFS volumes for asset storage (currently 1.2TiB), in a bid to improvement cost optimisation.
The Solution
Devoteam Consulting provisioned two new CloudFormation templated VPCs – staging and production – replete with private and public subnets, internet gateway, NAT gateway and baseline security groups. Into each VPC, they deployed a new ECS Fargate (serverless) stack to run containerised versions of Filmstro’s audio processing software. Given the batch-processing nature of this workload, the ECS tasks were configured to run on a poll, which can be adjusted by the client per environment.
AWS DataSync copies this data into a small EFS volume. When the containers execute, the EFS contents are batch-processed by the containers. There is a second DataSync task that exports processed files to another S3 bucket, which acts as source for AWS CloudFront.
Filmstro will eventually remove the dependency on EFS themselves, at a later date, given the high relative complexity of this refactoring. Each environment has been given its own CloudFront distribution and Web Application Firewall. Rules can therefore be customised on each firewall, in order to keep unsolicited use of CloudFront to a minimum. All deployed resources are private-by-default.
Finally, a Windows build server was migrated into the same private subnets. This can also only access via the VPN.
The Benefits
Filmstro are now in a better position to: begin building release pipelines; audit and categorise their short and long-term storage policies & lifecycles; utilise their new multiple environments in far more secure way than before; enjoy a reduced maintenance overhead and technical debt; leverage AWS managed services and serverless.
The overall benefits include:
Security enhancement
- No more public resources.
- Least-privilege access on internal networks (improved security groups).
- S3 buckets are private; more secure than EFS mounted by a public EC2 instance.
- Firewalled CloudFront will block unwanted traffic.
- No EC2 instance removes maintenance overhead (e.g. OS patching).
Cost Optimisation
- S3 storage cheaper than EFS; options for lifecycle policies and intelligent tiering.
- (Eventual) removal of EFS; once Node.js runtime can be refactored.
- ECS cheaper than EC2; old EC2 can be decommissioned in favour of short-running Fargate containers.
- Multiple environments will reduce errors in production.
- Multiple environments will help to reduce file storage costs (only store what’s needed in each environment).
- Use of managed services and severless technologies requires significantly less maintenance than the previous stack.
Operational benefit
- Costs can now be tracked per environment
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