Having some fun with AWS Route53

Amazon Web Services Route53 is a high available and scalable DNS solution. It can be used to route request inside and outside amazon web services as well. Route53 allow you to configure DNS health checker to route traffic to a healthy endpoint.

Route53 has plenty of features, for me best ones are:

Traffic Flow: Route end user to best endpoints.
Latency Based Routing: Routes users to region with lowest latency.
GEO DNS: Route users based on they IP location.
Private DNS for Amazon VPC:  Manages custom domains internaly.
DNS Failover: Avoid outages routing users to different locations.

For this post i will show how to install and do some basic operations with  CLI53 a command line interface for Amazon Route53.  For this post we will use CentOS / Amazon Linux Distribution.


How to Install on CentOs?

sudo yum install -y bind-utils
pip install cli53

Figureout the box name?

/opt/aws/bin/ec2-metadata | grep 'public-hostname:' | cut -d ' ' -f 2

Commands

dig redhat.com
dig redhat.com +nocomments +noquestion +noauthority +noadditional +nostats
dig redhat.com +noall +answer
Queries
dig redhat.com NS +noall +answer
dig -t NS redhat.com +noall +answer
dig redhat.com +short
dig -x 209.132.183.81 +short

Register DNS

cli53 list
cli53 rrcreate "DNS_ZONE_ID" "NAME" CNAME "HOSTNAME.AWS_AZ.compute.amazonaws.com" --replace --ttl "60"
cli53 rrcreate "DNS_ZONE_ID" "NAME" TXT "1 2 3 4" --replace --ttl "60"
Resources
view raw aws-dns-route53-dig.md hosted with ❤ by GitHub
Cheers,
Diego Pacheco

Popular posts from this blog

Having fun with Zig Language

Image
Zig is a general-purpose language created in 2016 by Andrew Kelly .  Zig aims to fix the issues C language has while being pragmatic and simple at the same time. Zig really shines as being simple by not having any hidden control flows, not having hidden memory allocations, no pre-processors, and no macros. Basically, it's one language and one language only. Since pre-processors and macros can get really complex and become their own universe. Sure it's not the Zig Philosophy.  Zig Compiler(Zig cc) also is a C compiler, and the interoperability from C to Zig is very good. Clearly, we can see influence from other languages like Go and Rust; however, Zig is pretty unique and different from Go and Rust.  Zig is fast. Zig is perfect for system programming. I bet we will see a lot of solutions being built in Zig. As a languages aficionado, I like to learn at least one language per year and sometimes more; Zig was my 2021 pick, did not regret it. Even if you dont use all language...
Keep reading

C Unit Testing with Check

Image
When I start on IT, several years ago(+15), C was the first language that I learned. But was not the first language I mastered and deployed in production which was...surprisingly Visual Basic 6.0. However, when I learned C or any language back on that old and arcane time noddy was into testing. However now is impossible to work professionally in any language without tests. C is a low-level language but still kicks ass and has several interesting libs/frameworks. People use to fear C a lot because of lack of syntactical sugar but once you get used to it is not that hard at all. Today I want to show how you can do Unit Testing with C. I will not show how to do Unit Testing with C++ but with C ANSI actually. We will be using Check a unit test lib for C ANSI.
read more »

Cool Retro Terminal

Image
I often don't blog about this kind of stuff. Yesterday I friend of mine showed me this awesome project called  cool-retro-term . When you work with Cloud Computing and DevOps Engineering you spend lots of time on the black screen testing things on the cloud.  When I saw this project I got very excited because it brings some nostalgy back to my life. To be 100% clearI'm not that old as my friend :-) However I share his joy into this retro terminals. This also reminds me some old games like Fallout 1 . I just this is pure fun so I'm sharing here with you guys some screenshots and also how to run on Gnome Ubuntu 17.04.
read more »