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Intro to Serverless

Intro to Serverless

Spreading the magic of serverless! How did we get here? Evolution of cloud models and architectures. Tenets of serverless computing. Use cases and challenges. Comparing costs for serverless vs traditional setup.

Rupak Ganguly

January 15, 2019
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  1. @rupakg rupakganguly.com
    Intro to Serverless
    basic understanding of serverless computing
    and why you should be interested
    Jan 15th, 2019 IT Workshop, Atlanta
    Rupak Ganguly

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  2. Rupak Ganguly
    technologist | enterprise architect | entrepreneur
    rupakganguly.com
    @rupakg

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  3. @rupakg
    rupakganguly.com
    Intro to Serverless
    basic understanding of serverless computing
    and why you should be interested
    • Evolution
    • Tenets of serverless computing
    • Use cases & challenges
    • Serverless costs compared
    We will look at:

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  4. Evolution
    serverless in context

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  5. @rupakg
    rupakganguly.com
    data centers
    monolithic architecture
    bare-metal servers
    tightly coupled components, deployed as single-unit

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  6. @rupakg
    rupakganguly.com
    cloud
    service-oriented architecture
    bare-metal, VMs, IaaS
    decoupled components, deployed as web services

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  7. @rupakg
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    platform-as-a-service
    micro-services architecture
    shift away from infrastructure management
    API centric, single responsibility services

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  8. @rupakg
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    functions-as-a-service
    serverless architecture
    zero administration of infrastructure
    functions as unit of deployment

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  9. serverless architecture
    shortest time to market
    greater developer productivity
    lowest total cost of ownership
    values
    applications run code in FaaS services
    and leverage other managed services

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  10. serverless architecture
    it’s all about events

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  11. Serverless Computing
    myths, benefits and qualities

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  12. @rupakg
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    serverless definition
    serverless: though servers exists, the developer
    does not have to think about them

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  13. @rupakg
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    faas providers
    AWS Lambda Azure Functions
    Google Cloud Functions IBM Cloud Functions

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    microservices
    zero administration
    FaaS
    pay-per-execution ecosystem
    auto-scaling
    event-driven
    serverless computing
    FaaS qualities

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  15. @rupakg
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    zero administration
    • no servers to maintain

    • no OS upgrades, no patches

    • renewed role of devops teams

    • paradigm shift, no ssh

    • no control over infrastructure

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  16. @rupakg
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    pay-per-execution
    • no paying for idle

    • upfront cost savings

    • micro-billing, per 100 ms *

    • 1 million requests free tier *

    • $0.20 per million requests
    post free tier *
    * AWS Lambda pricing

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    rupakganguly.com
    microservices
    • promotes single responsibility
    principle based services

    • no more death stars, monolithic
    apps

    • varied language support

    • small, autonomous, polygot teams

    • agility, quick & frequent
    deployments

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  18. @rupakg
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    ecosystem
    • use provider services

    • use of third-party services

    • S3, Kinesis, SNS, SQS

    • DynamoDB, Firebase, GraphQL

    • Cognito, Auth0, Synk, PureSec

    • CloudWatch, X-Ray, IOPipe

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  19. @rupakg
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    auto-scaling
    • auto scaling Lambda

    • auto scaling DynamoDB

    • based on load, throughput
    consumption

    • no need for auto-scaling
    group policies

    • enables high-availability

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    event-driven
    • trigger & respond to events

    • http events (API Gateway)

    • webhook events

    • scheduled events

    • rich ecosystem of event
    sources

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  21. Considerations
    security, use cases & challenges

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    security
    • Least privileges across resources

    • Reduce access to sensitive data, handle exceptions and
    validate input

    • Avoid embedding secrets, access keys and credentials in
    code

    • Throttle and define quotas

    • Encrypt data on the wire and data stored at rest

    • Scrutinize 3rd-party libraries & APIs for vulnerabilities

    • Be aware of new input/event sources
    guidelines & recommendations

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    use cases
    • real-time/streaming, batch processing: kinesis -> lambda

    • REST APIs, Graph APIs: lambda -> API Gateway endpoint

    • event-driven workflows, scheduled tasks, data transforms
    what are others building

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  24. @rupakg
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    use cases
    • web, mobile & IoT
    backends

    • form processing

    • authentication

    • devops
    automation

    • chatbots

    • file manipulation

    • voice apps (Alexa)

    • ETL workloads

    • image resizing

    • video transcoding

    • security audits

    • dynamic websites

    • web hook
    listeners

    • CRON jobs

    • CI/CD pipelines

    • log analytics
    what are others building

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  25. @rupakg
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    challenges
    • cold start latency, more
    with VPC

    • price at high volumes

    • developer experience

    • limitations

    • fear of vendor lock-in

    • application lifecycle
    management

    • metrics & monitoring

    • service discovery

    • team collaboration

    • standardization
    it’s not all rosy

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  26. Serverless TCO
    is it really cost-effective?

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  27. costs compared
    https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/

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  28. cost of solution
    https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/

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    cost breakdown
    •direct costs:
    • pay-per-invocation (no paying for idle)
    • Lambda cost, service(s) cost, data transfer cost, API
    Gateway cost
    •personnel costs:
    • building a devops team is not cheap, and involves a huge
    learning curve.
    • ~ 100,000+ per year per engineer
    https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/
    measurable costs

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    •overhead costs:
    • delegate ops responsibilities to your cloud provider
    reduced responsibilities for devops team
    • frees developers to focus on building business functionality
    •opportunity costs:
    • ability to iterate faster & business can test ideas faster than
    competitors
    https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/
    cost breakdown
    non-measurable costs

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  31. total cost of ownership
    https://theburningmonk.com/2019/01/you-are-thinking-about-serverless-costs-all-wrong/

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  32. @rupakg
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    resources
    • Blog: rupakganguly.com

    • Projects: github.com/rupakg

    • Serverless Blog: serverless.com

    • Serverless Framework: https://github.com/serverless/
    serverless
    further reading

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  33. @rupakg rupakganguly.com
    it’s a wrap
    thank you for coming

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