This document discusses serverless computing. It begins with a joke asking if servers can be ordered for serverless. It then defines serverless as user-defined functions that are event-triggered, automatically spun up and down on demand, and fully managed by the cloud provider. It discusses key aspects like statelessness, programming languages supported, pricing based on execution time, and compares serverless to PaaS and containers. It outlines benefits like reduced costs and management overhead, and disadvantages around performance, security, and limited control. It also provides examples of serverless use cases and integrated cloud services.

1. #LonVMUG@julian_wood
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Can I order some servers
for my serverless please?
@julian_wood
WoodITWork.com
London VMUG - 22 June 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
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
Funcatron

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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
Event
Trigger
Execute
Code

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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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event emitted
(produced)
event consumed
always asynchronous
Message Bus Events

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A Cloud Guru
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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 Node.js, Python, 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 no 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:
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 Function
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
NSX firewall rules
tagging
SRM
log analysis
security events

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VMware Infrastructure
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close to other stuff
VMware on AWS
deploy/scale Cloud Foundation
IBM BlueMix (Softlayer) + Watson
vSphere Integrated Containers
Photon
Kubernetes as a Service
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
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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http://www.jeffconf.com
London - 7 July 2017 - St John's Hoxton
https://serverless.zone/serverless-is-just-a-name-we-could-have-called-it-jeff-1958dd4c63d7

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Can I order some servers
for my serverless please?
@julian_wood
WoodITWork.com
London VMUG - 22 June 2017