Knative serving

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Apresentação sobre o Knative, seu objetos e fluxo interno e, principalmente, problemas que ele resolve e, nativamente, o Kubernetes não .

Technology

knative
"serverless" services on Kubernetes
Fagner Moura | @seufagner

Serverless, a hot topic
Serverless is a cloud-native development model that allows developers to build and run
applications without having to manage servers.
There are still servers in serverless, but they are abstracted away from app
development. A cloud provider handles the routine work of provisioning,
maintaining, and scaling the server infrastructure. Developers can
simply package their code in containers for deployment.
Once deployed, serverless apps respond to demand and automatically scale up
and down as needed. Serverless offerings from public cloud providers are usually
metered on-demand through an event-driven execution model. As a result, when a serverless
function is sitting idle, it doesn’t cost anything.
Serverless apps still
have servers blah
blah blah..

"Serverless" products Google & AWS
AWS Lambda (2014)
AWS Fargate (2017)
Google App Engine (2008)
Google Cloud Run (2019)
Google Cloud Functions (2018)
Subjects;
Cost
Resources available from-to
Protocols supported
Vendor Lock-in

Real world
In real systems you should take care about observability and security issues at least
Improve dev experience ﬂow
If you choose a wrong product, do you'll have a big problems to react (mainly with lock-in
vendors) when something wrong happens
Forget "deploy and forget" mantra. :D

Deployment
Revision
Network
Scaling
Collect metrics
TL;DR
> kn service_
Think about building blocks
with really good defaults to...

Deployment
Service
Ingress
Horizontal Pod Autoscaler
Service
think about stateless services +
request driven features

How to works
IngressGateway
(Istio/Kourier)
Do you remember?
Is about building blocks that
doesn't solve all the problems.

How to works (more deeper)
Reconcilier
"Webhook"
Network
controller
Autoscaler
Activator
Queue-proxy
Listen and updates them
using knative controller(s)
Forget webhook concept.
It checks conﬁgurations,
upsert K8s objects, etc.
TLS and Ingress

Is Serverless just running functions in a cloud? It’s more than that! Serverless computing refers to the concept of building and running applications that do not require server management. It describes a deployment model where applications, bundled as one or more functions, are uploaded to a platform and then executed, scaled, and billed in response to the exact demand needed at the moment. During the talk I’ll show how to use Knative both on Kubernetes and on OpenShift platform. Hopefully we will see why your organization should consider using Knative as one of its primary deployments models on hybrid cloud world.

The what, why and how of knative

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Serverless with Knative - Mete Atamel (Google)

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When you build a serverless app, you either tie yourself to a cloud provider, or you end up building your own serverless stack. Knative provides a better choice. Knative extends Kubernetes to provide a set of middleware components (build, serving, events) for modern, source-centric, and container-based apps that can run anywhere. In this talk, we’ll see how we can use Knative primitives to build a serverless app that utilizes the Machine Learning magic of the cloud.

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Serverless Functions: Accelerating DevOps Adoption

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Presented by: Daniel Oh Presented at the All Things Open 2021 Raleigh, NC, USA Raleigh Convention Center Abstract: Serverless functions are driving the fast adoption of DevOps development and deployment practices today. To successfully adopt serverless functions, developers must understand how serverless capabilities are specified using a combination of cloud computing, data infrastructure, and function-oriented programming. IT Ops teams also need to consider resource optimization (memory and CPU) and high-performance boot and first-response times in both development and production environments for faster time to market/service. What if we didn’t have to worry about all of that? In this session, I’ll be speaking about what kinds of open source projects and tools enable you to write a serverless function with superfast boot and response times and built-in resource optimization. Then, you’ll understand how these capabilities take you to advanced DevOps practices as well as business acceleration. Furthermore, developers can avoid the extra work of developing a function from scratch, optimizing the application, and deploying it to Kubernetes.

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Cloud Native Night February 2019, Munich: Talk by Olaf Meyer (Consol) Join our Meetup: www.meetup.com/cloud-native-muc Abstract: Knative is at the time being one of the most hyped frameworks for Kubernetes and OpenShift. In this talk I don't want to focus on the features from a technical point of view but rather have a look at what Knative brings to the table if you are running a cluster in an enterprise environment with different users and projects. At the end of the talk you should have a sound understanding what Knative is doing, what its benefits are, where it extends respectively conflicts with OpenShift and what its drawbacks are.

HashiCorp Consul integrates with Ambassador to securely route Ingress traffic to Consul Service Mesh when using Kubernetes. When onboarding applications onto a service mesh or when integrating with existing applications outside of the Mesh, a north south API gateway is typically required for communications with clients outside of the network. Ambassador is a Kubernetes API Gateway that allows you to route incoming traffic to your Consul Service Mesh proxies while also providing the ability to leverage advanced API Gateway functionalities such as rate limiting and authentication.

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Knative serving

2. orchestration

4. recap...

5. knative "serverless" services on Kubernetes Fagner Moura | @seufagner

6. Serverless, a hot topic Serverless is a cloud-native development model that allows developers to build and run applications without having to manage servers. There are still servers in serverless, but they are abstracted away from app development. A cloud provider handles the routine work of provisioning, maintaining, and scaling the server infrastructure. Developers can simply package their code in containers for deployment. Once deployed, serverless apps respond to demand and automatically scale up and down as needed. Serverless offerings from public cloud providers are usually metered on-demand through an event-driven execution model. As a result, when a serverless function is sitting idle, it doesn’t cost anything. Serverless apps still have servers blah blah blah..

7. "Serverless" products Google & AWS AWS Lambda (2014) AWS Fargate (2017) Google App Engine (2008) Google Cloud Run (2019) Google Cloud Functions (2018) Subjects; Cost Resources available from-to Protocols supported Vendor Lock-in

8. Real world In real systems you should take care about observability and security issues at least Improve dev experience ﬂow If you choose a wrong product, do you'll have a big problems to react (mainly with lock-in vendors) when something wrong happens Forget "deploy and forget" mantra. :D

9. Deployment Revision Network Scaling Collect metrics TL;DR > kn service_ Think about building blocks with really good defaults to...

10. Deployment Service Ingress Horizontal Pod Autoscaler Service think about stateless services + request driven features

11. How to works

12. How to works IngressGateway (Istio/Kourier) Do you remember? Is about building blocks that doesn't solve all the problems.

13. How to works (more deeper) Reconcilier "Webhook" Network controller Autoscaler Activator Queue-proxy Listen and updates them using knative controller(s) Forget webhook concept. It checks conﬁgurations, upsert K8s objects, etc. TLS and Ingress

14. Hands on

15. next.. Knative eventing

Knative serving

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