Linda Nichols
@lynnaloo
Norfolk.js
norfolkjs.org
The Monolith
@lynnaloo
The Monolith
@lynnaloo
The Monolith
@lynnaloo
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Single-tiered
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Performs all tasks
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Not modular
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Many dependencies
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Legacy technology
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On-premises/On a Mainframe
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Expensive to host/maintain
The Monolith
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The Monolith Onion
@lynnaloo
@lynnaloo
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Long-lasting, yet perishable
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Contains many layers
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Difficult to modularize
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Complicated deployments
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There can be a code "smell"
The Monolith Onion
@lynnaloo
The Monolith Onion
Dismantling
the monolith
@lynnaloo
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Separate the application tiers
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Create microservices
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Upgrade legacy technology
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Focus on security
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Re-write application code
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Move to "the cloud"
refactoring is expensive
@lynnaloo
time cost money.
People cost money.
legacy stays legacy
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Patching is cheap.
works "just fine" now.
containers, containers, containers...
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Let's go Serverless
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what is serverless*
@lynnaloo
* "Serverless" is a catchy, made-up marketing term. Kind of like "cloud."
what is serverless
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Serverless Architecture is an event-driven system that uses remote functions (likely FaaS or BaaS) without concern for the operations of the containers that execute the code.
functions as a service
@lynnaloo
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No Ops required*
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Developers focus on code
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Triggered by events
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Built-in API Gateway
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Really inexpensive
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Don't pay for idle code
@lynnaloo
functions as a service
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'use strict';
const catNames = require('cat-names');
function getCatName(event, context, callback) {
callback(null, { payload: `Your cat name is ${catNames.random()}.` });
}
module.exports.getCatName;functions as a service
Functions are microservices
@lynnaloo
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Responsible for one specific task
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Lightweight and fast
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Reusable
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Deployed independently
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Not dependent on other services
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Work together to power functionality
event-driven architecture
@lynnaloo
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Events internal and external to the cloud platform can trigger events
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Logic is decoupled from state and data
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Scalability
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Managed Services
event-driven architecture
@lynnaloo
Did you know that SQS can now trigger AWS LAMBDA functions?
gently Dismantle the monolith
@lynnaloo
@lynnaloo
break off serverless microservices
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Cron jobs
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Background services
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Calls to APIs
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Small Data Stores
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Maintenance scripts
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Logging/analytics
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IoT Devices
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Message bus
start with functionality that has the fewest dependencies.
@lynnaloo
break off serverless microservices
conclusion
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As more functionality is removed, less compute power is needed for the monolith. Re-engineering a small core is now more manageable and less expensive.
conclusion
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Modernization doesn’t have to be a one-time effort.
Serverless architecture facilitates gradual changes and results in a more immediate reduction in complexity and cost.
Thank You!
@lynnaloo
come talk to me at booth 628!
Photo Credit
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@PaulCHINJR
Gently Dismantle Your Monolith with Serverless Architecture
By Linda Nichols
Gently Dismantle Your Monolith with Serverless Architecture
7/17 - AWS Summit NYC
