Microservices and elastic resource pools with Amazon EC2 Container Service
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This talk explores a scalable and cost efficient way of deploying and running microservices workloads using quality of service scheduling on top of Amazon EC2 Container service. Running services in a pay as you go fashion will soon be a reality as much as todays on demand compute
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Microservices and elastic resource pools with Amazon EC2 Container Service
- 1. Microservices and elastic resource pools with ECS Boyan Dimitrov, Platform Automation Lead @ Hailo @nathariel
- 3. Microservices intro • Service to service communication libs • Discovery • Configuration • A/B testing capabilities • Monitoring & Instrumentation • … and much more Each service (at Hailo) gets for free: Service B Service A Service C Service E Service D Small, self-contained units of execution with well defined API Built around business capabilities or domain objects Responsible for one thing and one thing only Fully automated lifecycle AWS Summits 2015 Monolith App
- 4. What do we have AWS Summits 2015 • Microservices ecosystem based on Go • Designed specifically for the cloud – different building blocks and components will constantly be in flux, broken or unavailable • 1000+ AWS instances spanning multiple regions • 200+ services in production
- 5. Service interactions – not as scary as it looks! AWS Summits 2015
- 6. Service deployment specifics Main goals: Reliability, Ease of Use, Resource EfficiencyAWS Summits 2015 • Each service is decoupled from the rest and deployed individually • We run multiple services on the same instance • We rely on auto scaling groups for organizing and scaling our workload • We use static partitioning to match a service to an auto scaling group • An automated deployment system takes care of all service lifecycle details
- 7. Provisioning Service CI Pipeline Amazon S3 Provisioning Manager Provisioning Service Docker Registry Deployment overview and our journey towards containers Instance Instance Process Container Auto Scaling GroupAuto Scaling Group
- 8. How hard is to deploy a service? service name version auto scaling group AWS Summits 2015
- 9. Is this good enough? Main goals: Reliability, Ease of Use, Resource Efficiency service name version auto scaling group How do I figure this one out? Would my service live there forever? What if my team owns 20+ services ? As a developer: AWS Summits 2015
- 10. What about resource efficiency? 35% Utilization 85% Utilization Auto Scaling Group A Auto Scaling Group B AZ eu-west-1a AZ eu-west-1cAZ eu-west-1b instance instance instance instance instance instance instance instance instance Main goals: Reliability, Ease of Use, Resource EfficiencyAWS Summits 2015
- 11. Challenges AWS Summits 2015 • Our overall utilization across the services auto scaling groups is between 25% and 50% • Performance of individual services is way more complex than simple CPU and memory calculations. Accumulated interference on the instance needs to be accounted for • Static partitioning of services is hard and non scalable • Our developers should not care about service placement or infrastructure specifics!
- 12. So what do we want? Elastic resource pool 75-80% Utilization eu-west-1a eu-west-1b eu-west-1c One word – such difference! Main goals: Reliability, Ease of Use, Resource Efficiency instance instance instance instance instance instance
- 13. Our solution – cluster management on top of an elastic resource pool Elastic Resource Pool ECS Agent ECS Agent ECS Agent ECS Agent ECS Agent ECS Agent QoS Scheduler eu-west-1a eu-west-1b eu-west-1c AWS Cloud Provider ECS Cluster Manager instance instance instance instance instance instance
- 14. Why ECS? AWS Summits 2015 • It is a managed service! • It is great for storing and enforcing task state • Designed with custom schedulers in mind • The agent code is available on a public GitHub repo and … it is in GO! • Easy to integrate with other AWS services
- 15. Why building our own scheduler? AWS Summits 2015 • Service Priority • Service specific runtime metrics • Interference • Cloud awareness ( availability zones, pool elasticity…) Running services in a pay as you go fashion will soon be a reality as much as todays on demand compute We want a cloud-native scheduler that is aware of the cloud specifics and our microservices ecosystem:
- 16. {! “service”: “Foo”! ”minCPU": 10,! ”minMemory": 500,! “minInstances”: 3,! “Priority”: “Default”! } {! “service”: “Baz”! ”minCPU": 50,! ”minMemory": 1500,! “minInstances”: 3,! “Priority”: “Critical”! } Take Service Priority as an example AWS Summits 2015
- 17. t0 t1 X Star6ng t2 Service criticality ma ers when resources are constrained AWS Summits 2015 instance instance instance instance instance instance instance instance instance instance instance instance t3
Editor's Notes
- Seamless user experience
- We built our custom provisioning system and we started by running a number of services on a single instance Initially we were running services as normal processes on the instance but this started causing noisy neighbour problems Several months ago we gradually started moving to containers aiming for isolation and resource control capabilities.
- Using static partitioning leaves a lot of unused resources When running many services on the same instance, using generic auto scaling group triggers is inefficient Running a lot of services together, containers or not, creates interference
- We want an elastic resource pool where services are scheduled on a need to basis We don’t want to manage services manually and leave that to a smart scheduler