Networking and Kubernetes

Networking And Kubernetes: A Layered Approach ✍️ By @strongjz and @isthelaststop 📓Available from @OReillyMedia

[Alex Xu @alexxubyte]

What does API gateway do?

[Rohit Ghumare @ghumare64]

Day 2 of DevOps: Network Protocols & HTTP Basics

Core Network Protocols:
➡️TCP (Transmission Control Protocol)
➡️UDP (User Datagram Protocol)
➡️HTTP/HTTPS (Web protocols)

HTTP Methods:
➡️GET: Retrieve data
➡️POST: Submit data
➡️PUT: Update data
➡️DELETE: Remove data

Let's do hands-on practical exercises:

IDK, if these will get formatted properly on X, but who gives a shit.

Make a simple HTTP request:
`curl -I https://t.co/QpkKUCC03a`

Send a GET request with headers:
`curl -H "Accept: application/json" https://t.co/K0Shh6R9Hs`

Monitor network traffic:
`netstat -an`

Create a simple HTTP server in Python:
```
from http.server import HTTPServer, SimpleHTTPRequestHandler

def run(server_class=HTTPServer, handler_class=SimpleHTTPRequestHandler):
server_address = ('', 8000)
httpd = server_class(server_address, handler_class)
print('Starting server on port 8000...')
httpd.serve_forever()

if __name__ == '__main__':
run()
```

Run the server:
`python simple_server.py`

Visit `http://localhost:8000` in your browser to see it working.

Key Takeaways for Day 2:
👉Understanding HTTP request/response cycle
👉Basic HTTP methods and status codes
👉How to use curl for API testing
Creating a basic HTTP server

Try these exercises, and let me know if you need clarification on any concept!

Follow @ghumare64 for Day 3 of DevOps; We will learn DevOps Daily.

[LearnKube @learnk8s]

The tutorial covers creating CRDs, including defining the scope, spec, and status, and using validation markers and Common Expression Language (CEL) to ensure well-defined configurations

➤ https://t.co/cUcCMjzH5n

[James Strong @strongjz]

I got this dm yesterday, it feels great to hear that @NetworkAndK8s is helping folks.

[Go @golang]

🥳 Go 1.22.0 is released!

🗒️ Release notes: https://t.co/WGgf1Nm0Mu

📦 Download: https://t.co/pRCJTZElxC

#golang

[Isovalent @isovalent]

👀 Here are some insights into the dynamic world of Kubernetes networking! 🌐 In this blog, Jeremy Colvin dives deep into the roles of kube-proxy and iptables, unraveling their significance in the #Kubernetes ecosystem!
https://t.co/4dzkG22VVj

[LearnKube @learnk8s]

This article provides an in-depth guide on how to work with a Kubernetes cluster and Containerd, discussing how images are pulled from DockerHub and the efficiency of the process

➤ https://t.co/KvKHcuAOgH

[LearnKube @learnk8s]

In this guide, you will learn how Cilium processes packets in Kubernetes using eBPF

➜ https://t.co/E8Ucof6PKP

[Alex Xu @alexxubyte]

How is data sent over the internet? What does that have to do with the OSI model? How does TCP/IP fit into this?

7 Layers in the OSI model are:
1. Physical Layer
2. Data Link Layer
3. Network Layer
4. Transport Layer
5. Session Layer
6. Presentation Layer
7. Application Layer

--
Subscribe to our weekly newsletter to get a Free System Design PDF (158 pages): https://t.co/uc5M7CdXXC

[K8sContributors @K8sContributors]

Blog: Kubernetes 1.29: New (alpha) Feature, Load Balancer IP Mode for Services - https://t.co/y7n9FiMFuM #Kubernetes

[LearnKube @learnk8s]

KubeSkoop is a networking diagnosis tool for different CNI plug-ins

It automatically reconstructs the network traffic graph and monitors and analyses the kernel's critical path with eBPF to resolve most cluster network problems

➤ https://t.co/6RR4ykvdcx

[Ruurtjan Pul @Ruurtjan]

They say you should learn the fundamentals, and the rest will fall into place.

DNS is right at the foundation of the internet.

[Carlos Santana @csantanapr]

We resume the CNCF Kubernetes Book Club on January 12th with the CKS Study Guide by @bmuschko
Join the CNCF Slack channel kubernetes-book-club and add your contact info to get a voucher or discount for the book.
You can add an invite to your calendar here https://t.co/oYs4RFivy0

[Networking and Kubernetes @NetworkAndK8s]

With their powers combined @ciliumproject hubble, @kubeshark_oss , and netshoot you can overcome any k8s networking issue!

[LearnKube @learnk8s]

In this blog post, you will delve into the essentials of network traffic within Kubernetes clusters, explore tools and techniques for packet capturing, and unearth best practices to ensure our efforts are efficient and safe

➜ https://t.co/UDhf13ujEn

[KodeKloud @KodeKloudHQ]

🧵 Tips and Tricks to Pass the CKA and CKAD Exams (Resource Links Included) 👇

Ace the CKA and CKAD exams with these crucial tips and helpful resource links!

[SAIM SAFDAR @cloudnativeboy]

Linux device virtualization technology has continually evolved in different directions, from serving VM & supporting containers to combining software & hardware approaches that allow for maximum performance and flexibility

A day dedicated to learning:
https://t.co/OW6aBt4CRn

[Go @golang]

🌟 Go 1.21.5 and 1.20.12 are released!

🔐 Security: Includes security fixes for net/http (CVE-2023-39326), cmd/go (CVE-2023-45285), path/filepath (CVE-2023-45283 update).

📢 Announcement: https://t.co/tLJyRFqLuI

⬇️ Download: https://t.co/p7GiE74HHs

#golang

[Kubesploit @kubesploit]

Multi Tool Kubernetes Pentest Image contains all the most popular and necessary tools for Kubernetes penetration testing

➤ https://t.co/ALyDGhSYZC