Blog
Thoughts on engineering, design, and building great products.
Swarm: Overlay Network and Routing Mesh
How do containers on different nodes talk to each other, and why does publishing one port make it reachable from any node? This article explains the overlay network (VXLAN), service discovery via VIP, and the routing mesh.
Swarm: Stack and Secrets — A Complete Deployment
The final article: deploy a whole multi-service app onto the cluster with docker stack deploy from a compose file, manage passwords safely with secrets, then clean everything up and leave the swarm. With a series wrap-up.
What DevOps Is and Why You Should Learn It Alongside AWS
Series opener: what problem DevOps solves, what work it covers, why we learn it together with AWS, and the hands-on roadmap ahead.
Open an AWS Account Safely and Set Up a Billing Alert
Create an AWS account the right way: enable MFA on the root account, create an IAM user for daily use, install the AWS CLI, and set a Budget so no bill catches you off guard.
EC2: Create Your First Virtual Server and Run a Web Server
Create an EC2 instance, SSH into it, install nginx, and open the web page in a browser. The first article with a billable resource, so also the first with a cleanup section.
VPC and Security Group: Networking and Basic Firewalling on AWS
Understand VPC, public/private subnets, route tables, and Security Groups. Know why your server lets some in and not others, and how to tighten access correctly.
S3: Store Files and Host a Static Website
Create an S3 bucket, upload files, and host a static website on the Internet without any server running continuously. Understand buckets, objects, and managing access.