Notes from learning to build stuff.

no-frills content for developers wanting to ship ⚡️

Latest

  1. Using network namespaces and a virtual switch to isolate servers

    Yet another blog post on how to create a virtual network that connects network namespaces using a brdige, veth pairs and iptables.

    Jun 12 - 2018
  2. Adding privileged containers to Docker Swarm mode

    Privileged services are not something you can have with a regular Docker Swarm cluster. Check out how to have privileged containers using Docker Swarm Mode

    Jun 5 - 2018
  3. Compiling and running your own forked Docker release

    Installing docker has never been easier - add the apt repository and install it. What about running your own fork of it?

    Jun 3 - 2018
  4. 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.

    Apr 29 - 2018
  5. Running Docker with a forked RunC

    Check oout how the docker daemon interacts with containerd and how we can leverage that to modify runc and set some defaults

    Feb 28 - 2018
  6. Implementing a TCP server in C

    Writing a TCP server in C can teach many things. Check out how to implement a TCP server and understand some of the syscalls involved in the process.

    Feb 22 - 2018
  7. A practical look at basic AWS Networking with Terraform

    A conventional AWS Networking Tutorial out there using Terraform doesn't go around the concepts of AWS Networking. Check out how to provision an AWS VPC with multiple subnets and configure security groups using Terraform.

    Feb 18 - 2018
  8. Nginx HTTP2 Server Push

    NGINX just added server push to mainline. Checkout a NGINX HTTP2 server push example using the latest code from source integrating with an HTTP1 Golang web server.

    Feb 13 - 2018
  9. The first limit you'll hit on AWS EFS: Locks

    AWS imposes various quotas on the usage of its distributed filesystem. Check out how to go over them by running MYSQL on EFS and then developing a stress test.

    Feb 10 - 2018
  10. Initializing Grafana with preconfigured dashboards

    Grafana v5 is coming with two great features: dashboard and data source provisioning. Checkout how to initialize a dashboard without touching the UI using this new release

    Feb 9 - 2018
  11. Simulating AWS tags in local Prometheus

    Going through Prometheus relabelling to emulate an AWS environment locally with Vagrant

    Feb 8 - 2018
  12. What happens when a pipeline is created in Concourse CI?

    A dive into how the fly command set-pipelines triggers a pipeline registration in concourse ATC

    Feb 5 - 2018
  13. How to build and run Concourse CI locally

    Get Concourse CI built from source - the first step to contributing to the project.

    Feb 4 - 2018
  14. Creating a simple extension to block websites

    Seeing yourself procrastinating in HackerNews? Create an extension that blocks it. All in less than 20 lines of code.

    Jan 26 - 2018
  15. How to publish a blog using AWS

    AWS can guarantee amazing speeds for serving a blog - it supports HTTP2, IPv6, caching and has free TLS certificates. Check out how I do it for this blog.

    Jan 15 - 2018
  16. Configuring HAProxy with HTTP2 support

    HTTP2 support recently landed in HAProxy 1.8. Check out how to configure HTTP/2 support for HAProxy.

    Jan 8 - 2018
  17. Sending files via gRPC

    gRPC shines when it comes to sending a bunch of messages here and there. What about file uploads? Is gRPC a good fit for file transfer? Check out how to send files with gRPC and see if that makes sense.

    Jan 2 - 2018
  18. Should you buffer your writes?

    It's common practice to have a buffer between the network and your application. Today I tried to measure how different buffer sizes changes the total time to transfer 1GB of data.

    Dec 31 - 2017
  19. Writing DNS messages from scratch using Go

    How to write a DNS message from zero and send it via UDP to a server.

    Dec 28 - 2017
  20. Can we manage multiple GitHub repositories in a better way?

    Wondering how a project manager might look at GitHub triggered some questioning. How could someone extract more meaningful data from it?

    Dec 25 - 2017
  21. Creating a hello-world API using Swagger and Go

    Swagger allows us to separate api definition from implementation. This guide goes through the process of creating a minimal API using go-swagger and Golang.

    Dec 5 - 2017
  22. A minimal Docker Ansible role

    How to create a minimal Ansible role that provisions a Linux machine to have Docker installed - from role conception to testing it using Vagrant.

    Dec 4 - 2017
  23. Incremental backups using GNU Tar and S3

    How to take snapshots of a directory and send to them as backups to S3 using Linux tools

    Dec 2 - 2017
  24. Updating the Docker version in Travis-CI

    Docker is not always up to date in Travis' builds. Check out how to update the version of Docker in Travis-CI.

    Nov 28 - 2017
  25. Inspecting Docker images without pulling them

    How to inspect a docker image from dockerhub without pulling it

    Nov 26 - 2017
  26. Getting TLS certificates with Letsencrypt and HAProxy

    A guide on building and configuring HAProxy from scratch to achieve HTTPS with Letsencrypt certificates

    Nov 25 - 2017
  27. Pushing Docker images right from Travis-CI

    How to automate the process of building an image and pushing it to DockerHub using Travis-CI

    Nov 24 - 2017
  28. Changing the name of an index in Elasticsearch

    Elasticsearch indices can be renamed with two different approaches - Reindex API and Aliases. Checkout out how to rename an Elasticsearch Index using these approaches.

    Nov 21 - 2017
  29. Executing multiple commands in SSH session against multiple machines

    It might happen that you need to execute multiple commands against a set of machines via SSH. Check out how to do it programmatically.

    Nov 20 - 2017
  30. Concurrently running container-based and VM tests in Travis-CI

    Running container and virtual machines side by side in Travis is possible. Check out how to do it

    Nov 18 - 2017
  31. Why my Ubuntu container doesn't execute profile scripts?

    Making use of the login flag to make sure bash executes profile.d scripts.

    Nov 13 - 2017
  32. A Dockerfile tailored for Golang applications

    Leveraging multi-stage builds to create tiny Golang Docker images

    Nov 12 - 2017
  33. LVM on loopback devices

    An actionable guide on how to use LVM without formatting physical disks and just using loopback devices

    Nov 11 - 2017
  34. Minimal Golang Makefile

    Having build many Golang projects I came with a minimalist makefile that might work for you.

    Nov 11 - 2017
  35. How to install HAProxy with Lua support on MacOS

    Setting up HAProxy on Mac is not complicated. Check out how to build it from source and run it locally.

    Oct 27 - 2017
  36. Augmenting Linux Swap Space

    How to extend Swap space on Linux after you already set it

    Sep 24 - 2017
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