The last infrastructure talk for web developers @ PHP Serbia Conference 2018

The last infrastructure talk for web developers or why your
future apps will be serverless

Slobodan Stojanovic CTO @ Cloud Horizon co-author of Serverless Apps
with Node and Claudia.js @slobodan_ effortless-serverless.com

@slobodan_ Do you know the feeling when…

@slobodan_ • you solve the problem you worked on last
couple of days in just five minutes this morning • you successfully implemented a new tool/framework on your new project • you receive an awesome feedback from your customer • you work on interesting problems in an awesome team • you have a brilliant new idea, and you can't stop coding it

@slobodan_ The good

@slobodan_ But, do you also know the feeling when…

@slobodan_ • spending two days trying to setup vagrant/homestad for
a project you just jumped in • setup a dev server, because that's no one's job but you need it • apply new security patches on all of the servers • try to figure out how to do yet another thing with Docker • try to sell yet another necessary refactoring to your client or boss

@slobodan_ The bad

@slobodan_ Finally, do you know the feeling when…

@slobodan_ • you have an important demo, you worked hard
on for a few weeks, and it just doesn't work on the server • you have server and application issues during an important event or advertising campaign • one of your Wordpress sites is hacked • you need to fix an urgent issue during the weekend or in the middle of the first vacation you had in a few years

@slobodan_ The ugly

@slobodan_ What is your job?

@slobodan_ Is it to write a code?

@slobodan_

@slobodan_ I hope it's not that :)

@slobodan_

@slobodan_ Your job should be to understand the business needs
and empower it with technology

@slobodan_ How did we end up here?

@slobodan_ How did we end up here? or the evolution

@slobodan_ Genesis of compute and applications (ie. Eniac)

@slobodan_ Custom built compute and applications, and genesis of operating
systems

@slobodan_ Compute, applications and OS are products,  genesis of good
architecture practices

@slobodan_ New good programming practices and custom built frameworks

@slobodan_ Cloud

@slobodan_ New architectural best practices

@slobodan_ DevOps

@slobodan_ But, what's next? …and can we do better?

@slobodan_ Simon Wardley explains it better with "Why the Fuss
about Serverless?" and Wardley maps

@slobodan_ From "Why the Fuss about Serverless?" (https://youtu.be/SPsaqiegOP4)

@slobodan_ … serverless

@slobodan_ What is serverless, anyway?

@slobodan_ Serverless computing is a cloud-computing execution model in which
the cloud provider dynamically manages the allocation of machine resources.

@slobodan_ Pricing is based on the actual amount of resources
consumed by an application, rather than on pre-purchased units of capacity.

@slobodan_ What does that mean?

@slobodan_ Serverless app costs you nothing* if nobody is using
it * except storage price

@slobodan_ Benefits?

@slobodan_ • Autoscaling • Pay for used capacity only •
No server maintenance • Short time to market • Cheap

@slobodan_ Why is serverless important?

@slobodan_ Why is serverless important? to me »

@slobodan_ Most of the time we use big companies, such
as Netflix or Facebook, as role models for our tech. They do amazing things, but are they really good role models for small companies?

@slobodan_ You'll never have most of the problems they have.
Should you use the same best practices?

@slobodan_

@slobodan_ On the other hand, serverless brings most benefits to
small and medium business

@slobodan_

@slobodan_ But that's not all

@slobodan_ • simplifies my apps • allows small teams to
move fast and accomplish more • function isolation • managed infrastructure + autoscaling • code reusability • financial incentives for refactoring

@slobodan_

@slobodan_ It also reduces the amount of back end code*
* probably not the smartest thing to say on BE conference :)

@slobodan_

@slobodan_ "Oh, and I only hire front-end developers at this
point. I have been the sole DevOps/backend/ middle-tier developer in the last two companies I started, and it’s been fine." Joe Emison (@JoeEmison)

@slobodan_ "With AppSync I could continue to be the CTO,
do all the backend and middle-tier code, and support up to probably about a hundred front-end developers before I would need a dedicated backend developer." Joe Emison (@JoeEmison)

@slobodan_ Can I host my serverless infrastructure?

@slobodan_ You can, but it's not serverless anymore

@slobodan_ "There's a difference between managed infrastructure and managed compute. 
You're fully serverless only when both infrastructure and compute are managed" Ben Kehoe (@ben11kehoe)

@slobodan_ So, functions on your own architecture are not serverless

@slobodan_ Neither are containers that are running even if no-one
is using them

@slobodan_ What do we need to change to get benefits
from serverless?

@slobodan_ Mindset

@slobodan_

@slobodan_ "Transition to the #cloud: treat servers like cattle, not
pets. Transition to #serverless cloud architecture: treat servers like roaches" Ben Kehoe (@ben11kehoe)

@slobodan_ No more large frameworks

@slobodan_ Simplify things

@slobodan_ Move fast

@slobodan_ Process Driven Development cc. @simalexan

@slobodan_ Are there any serverless patterns and anti-patterns?

@slobodan_ Genesis of patterns and anti-patterns

@slobodan_ Serverless monolith

@slobodan_ Fanout

@slobodan_ Create your own patterns and anti- patterns. Just be
creative!

@slobodan_ How does serverless work in practice?

@slobodan_ CodePen codepen.io

@slobodan_ • team of mostly front end developers + one
DevOps • Ruby on Rails backend • many preprocessors that needs full isolation • > 200k requests/hour in peak • unexpected peaks (you never know when some pen will become popular)

@slobodan_

@slobodan_ • shorter time to market • front end devs
can deploy production-ready preprocessors without DevOps help • autoscaling and isolation • superpowers for front end developers

@slobodan_ Desole desole.io

@slobodan_ Desole is an open source error-tracking system you can
install in your AWS account.

@slobodan_ It enables orgs to track app exceptions and errors
without having to choose between the convenience of SaaS and the security of a self-hosted solution.

@slobodan_ • convenient and secure • cheap and scalable •
one click installation from Serverless AppRepo • GDPR friendly :)

@slobodan_

@slobodan_ Three person team and 2-3 days of development

@slobodan_ Vacation Tracker Bot vacationtrackerbot.com

@slobodan_ • small in-company startup (1-2 developers) • Slack chatbot
+ API + Angular dashboard • current cost of the infrastructure: $0

@slobodan_

@slobodan_ • small team • reusable parts for the next
product • short time to market • cheap infrastructure • easy refactoring and changes

@slobodan_ Result?

@slobodan_ vacationtrackerbot.com

@slobodan_ Live Demo

@slobodan_ Live Demo …or how does serverless work

@slobodan_

@slobodan_ Links to things that I mentioned

@slobodan_ • Claudia.js - https://claudiajs.com • Desole - https://desole.io •
Vacation Tracker - https://vacationtrackerbot.com

@slobodan_ Summary

@slobodan_ • do not be religious about your framework and
tools • be open-minded and embrace new technology • your job is to understand and empower the business, use the best tools to accomplish that • check out serverless, it might help you

@slobodan_ One more thing!

@slobodan_

@slobodan_ Serverless Apps with Node and Claudia.js Use ctwphpsrb18 promo
code for 40% off effortless-serverless.com/book @slobodan_

Thanks!

The last infrastructure talk for web developers...

The last infrastructure talk for web developers @ PHP Serbia Conference 2018

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