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2018-06-22-RomaniaPHP-Introduction-to-Serverles...
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Rob Allen
June 10, 2018
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2018-06-22-RomaniaPHP-Introduction-to-Serverless-PHP.pdf
Rob Allen
June 10, 2018
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Transcript
Introduction to Serverless PHP Rob Allen June 2018
Deployment options 1. Physical servers 2. Virtual machines 3. Containers
Rob Allen ~ @akrabat
Container deployments 1. Platform (e.g. Kubernetes) 2. Application (e.g. Cloud
Foundry) 3. Serverless (e.g. OpenWhisk) Rob Allen ~ @akrabat
Serverless? The first thing to know about serverless computing is
that "serverless" is a pretty bad name to call it. - Brandon Butler, Network World Rob Allen ~ @akrabat
AKA: Functions as a Service • A runtime to execute
your functions • No capacity planning or load balancing; just tasks being executed. • Pay for execution, not when idle Rob Allen ~ @akrabat
Use-cases Synchronous Service is invoked and provides immediate response (HTTP
requests: APIs, chat bots) Asynchronous Push a message which drives an action later (web hooks, timed events, database changes) Streaming Continuous data flow to be processed Rob Allen ~ @akrabat
Benefits • No need to think about servers • Concentrate
on application code • Pay only for what you use, when you use it • Language agnostic: NodeJS, Swift, Python, Java, C#, etc Rob Allen ~ @akrabat
Challenges • Start up latency • Time limit • State
is external • DevOps is still a thing Rob Allen ~ @akrabat
It's about value Rob Allen ~ @akrabat
When should you use serverless? • Occasional server needs on
a static site • Variable traffic levels • Additional compute without extending current platform • Responding to web hooks Rob Allen ~ @akrabat
Serverless providers Rob Allen ~ @akrabat
OpenWhisk Rob Allen ~ @akrabat
OpenWhisk OpenSource; multiple providers: IBM RedHat Adobe (for Adobe Cloud
Platform APIs) &, of course, self-hosted Rob Allen ~ @akrabat
Invoking an action Rob Allen ~ @akrabat
Serverless PHP Rob Allen ~ @akrabat
Hello world in PHP Rob Allen ~ @akrabat
Hello world in PHP Rob Allen ~ @akrabat
Running your action $ wsk action update hello hello.php ok:
updated action hello $ wsk action invoke hello --result { "msg": "Hello World" } Rob Allen ~ @akrabat
Dependencies Zip them up $ zip -r hello.zip hello.php vendor
$ wsk action update hello hello.zip --kind php:7.1 Rob Allen ~ @akrabat
Web access Add the --web flag: $ wsk action update
hello hello.php --web true $ curl https://openwhisk.ng.bluemix.net/api/v1/web/ \ 19FT_demo/default/hello.json Rob Allen ~ @akrabat
What to do in your action • Compute! • Store
to database • Make API calls to other services • Store to cloud storage (S3) • Trigger other actions Rob Allen ~ @akrabat
Demo time! Rob Allen ~ @akrabat
To sum up Rob Allen ~ @akrabat
Resources • http://www.openwhisk.org • https://medium.com/openwhisk • https://github.com/akrabat/ow-php-ftime • https://www.martinfowler.com/articles/serverless.html Rob
Allen ~ @akrabat
Questions? Rob Allen ~ @akrabat
Thank you! Rob Allen ~ @akrabat