Serverless, Show me the servers! - UKVMUG 2017

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Serverless:Show me the servers!

@julian_woodWoodITWork.com

UK VMUG – 16 November 2017

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set of instructions

collection of functions

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if

software is eating the world

then

serverless is eating software

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the same way WiFi is wireless…

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So, what is Serverless?

Event Driven Functions as a Service

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What is Serverless?

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user defined functions

small & discrete

event triggered

spun up and down on demand

fully managed compute

upload code, provider does rest

transparent scaling, provider managed

no VMs/containers to manage

pay per code execution

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Stateless Event Driven Functions as a Service

https://www.slideshare.net/bennybauer1/serverless-when-to-faas

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Amazon Lambda Azure Functions Google Cloud Functions

kubernetes based

Funktion

cross container platform

Oracle Fn OpenFaaS

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https://specify.io/concepts/serverless-baas-faas

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FaaS & BaaS

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(mobile) Backend as a Service

back end services

not backend logic

Amazon API Gateway

Google Firebase

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Deploy Code

EventTrigger

ExecuteCode

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Events

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HTTP requests

file changes

web hooks

time scheduled tasks

database record update

events stream

message bus

new code commit to GitHub

IoT sensor reading

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File Processing

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execute code every 15 minutes that cleans up a database table

Timer processing

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https://azure.microsoft.com/en-us/services/functions/

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Webhook

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https://azure.microsoft.com/en-us/services/functions/

webHook URL, saves user data, decides what data to display

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sensors in tractor detects need for a spare part and automatically place order

Stream processing

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https://aws.amazon.com/kinesis/

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Alexa

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https://mike.lapidak.is/thoughts/plex-alexa-interacting-with-your-media-server-through-voice

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A Cloud Guru

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event emitted(produced)

event consumedalways asynchronous

Message Bus Events

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Fission – http request

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Languages

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Azure Functions JavaScript, C#, F#, Python, PHP, Bash, Batch,PowerShell

AWS Lambda Node.js, Python, Java 8, C# (.NET Core)

Google Cloud Functions Node.js

Apache OpenWhisk Node.js, Swift, Python, container

Platform9 Fission

OpenFaaS

Node.js, Python, container

Node.js, Java, GoLang, C#/.NET Standard,Python, Ruby, container

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Stateless

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ephemeral

no local state

write state to external disk / database

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£ How Much?

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requests

+ duration (rounded up to 100 ms)

x configured upper memory limit

Free: ☺

1 or 2 million requests + 400,000 Gb-s

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FaaS vs. PaaS

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FaaS:

scaling for individual requests

bring whole app up and down for each request

PaaS:

long running

tooling and maturity

caching

state

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FaaS vs. Containers

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FaaS:

event driven

container abstraction

Containers:

general purpose IaaS

tooling

DIY languages

portability

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Benefits

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Cost: development, operational, scaling

Easier autoscaling,

Management: zero system administration

Productivity: pure function code,

no HTTP sessions, authentication,

back-end glue

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Disadvantages

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Performance:

Security:

Resources:

shared time limit (not GCP)

disk memory

warm up concurrent executions

inconsistent

spin up time especially JVMs

no multi-tenancy

noisy neighbour

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Disadvantages

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Configuration:

Ops:

Skills: all new cloud platform differences

limited languages discovery

environment variables stateless

testing monitoring

debugging external systems

versioning blue/green

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Disadvantages

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no roadmap

vendor lock-in

outsourced control = downtime?

portable code, not portable ops

isolated events/bus

integrated services

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AWS Integrated Services

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Azure Integrated Services

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FaaS at the Edge

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Azure Stack + Azure Functions

Embedded Lambda on connected devices

AWS Greengrass Edge

AWS Snowball Edge

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FaaS & NoOps - look no OS! ☺

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“Ops” = way more than server administration

FaaS = outsourcing sysadmin

monitoring, architectural scaling,

security, debugging, networking

FaaS 4 Ops : tagging, lifecycle, security, compliance

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VM Management use cases?

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PowerCLI

snapshots

VM creation / deletion / resizing

NSX firewall rules

tagging

SRM

log analysis

security events

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VMware on AWS

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close to other stuff

deploy/scale Cloud Foundation

IBM Cloud (BlueMix/Softlayer) + Watson

PKS (Pivotal + Kubernetes + NSX-T)

vSphere Integrated Containers

Ops + DevOps

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Make Money

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sell your functions

Amazon API gateway -> API marketplace -> Lambda

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The Amazing Functional Billing

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functional granulatory

visibility

focus dev time

reduce waste & duplication

prove insource/outsource

marketplace service discovery

cheap to play

correlate business cost to IT cost

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What’s coming/needed

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better tools, monitoring, logging etc.

Service Fabric Workflows

AWS Step Functions Azure Logic Apps

Vendor abstraction

Serverless Framework Lambada Framework

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if you have event triggers…..

do you skip PaaS?

do you skip containers?

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Serverless:Show me the servers!

@julian_woodWoodITWork.com

UK VMUG – 16 November 2017