Articles for the Cloud-Native Software Engineer

How to set up a Private Docker Registry using AWS S3

Go through the process of creating a Terraform configuration for deploying a Docker registry to an instance making use of IAM roles.
Blocking EC2 Metadata service from Docker containers in AWS

Check out how to make sure Docker containers running in AWS are unnable to access the EC2 metadata service.
How to set up AWS EFS across multiple availability zones using Terraform

Having an AWS EFS file system over multiple availability zones using Terraform is not complicated. Check out one way of doing it.

Blocking ingress traffic to Docker swarm worker machines

Once a Docker Swarm Mode cluster is formed, all nodes participate in the routing mesh and accept ingress traffic. Check out how to block that feature.
How to set up a Private Docker Registry using AWS S3

Go through the process of creating a Terraform configuration for deploying a Docker registry to an instance making use of IAM roles.
Retrieving Docker Registry metrics using Prometheus

Docker registry used not to have a Prometheus exporter by default. Check out how to make use of it in the development branch.

How to minify and bundle assets using Hugo

Hugo Pipes arrived - asset post-processing is now built directly into Hugo. Check out how I made use of CSS minification and bundling to render AMP pages better
An Example of Go RPC Client and Server

Having jump straight to gRPC, I got surprised by how easy is to set up Go RPC using net/rpc package. Check out a simple example exploring this package.
A Dockerfile tailored for Golang applications

Leveraging multi-stage builds to create tiny Golang Docker images

Using HAProxy maps with Access control lists (acl)

HAProxy frontends can have their logic simplified by using maps. Check out how to tie maps with ACLs to improve routing.
Making HAProxy respond 200 OK to health checks

Sometimes you need HAProxy to have a special frontend to return 200 OK when a request is made for health-checking purposes. Check out three ways of doing it.
Replacing HAProxy ACLs by HAProxy Maps

HAProxy maps can reduce the complexity of haproxy configurations by allowing you to define map lookup logic. Check out how to remove ACLs in favor of maps.

Dmesg under the hood

Dmesg allows us to grasp what's going on under the hood when the kernel gets bad. Check out how dmesg is able to read kernel logs and show to the user.
Analyzing Tcpdump capture in real-time with Wireshark

Check out how to pipe a live packet capture from tcpdump into a Wireshark instance in MacOS
Developing eBPF code with autocompletion support

There's no need to lose the great features of a well set up Vim configuration when coding eBPF code.

Blocking ingress traffic to Docker swarm worker machines

Once a Docker Swarm Mode cluster is formed, all nodes participate in the routing mesh and accept ingress traffic. Check out how to block that feature.
A minimal TCP Client in C

Go through the steps and syscalls involved in creating a TCP client using C.
Blocking EC2 Metadata service from Docker containers in AWS

Check out how to make sure Docker containers running in AWS are unnable to access the EC2 metadata service.

Passing the results of a command as a file to another script

Bash process substitution can make you not depend on processes expecting input from the standard input. Learn how to supply the result of a script as a temporary filename for another command.
How to minify and bundle assets using Hugo

Hugo Pipes arrived - asset post-processing is now built directly into Hugo. Check out how I made use of CSS minification and bundling to render AMP pages better
Developing eBPF code with autocompletion support

There's no need to lose the great features of a well set up Vim configuration when coding eBPF code.

Passing the results of a command as a file to another script

Bash process substitution can make you not depend on processes expecting input from the standard input. Learn how to supply the result of a script as a temporary filename for another command.
Measuring HTTP response times with cURL

Without getting out of your current shell and installing other utilities, give cURL a try to measure response times - it can do it.
Shell: replacing a variable with the contents of a file

How to create a poor man's templating engine using AWK

Notes from learning to build stuff.