Node.Js to Kubernetes journy

Hello all,

Yea yea long time no see 🙂 I know, I haven’t share a new improvement story for long time . Improvement is a kind of life style for me but I couldn’t have time share all of it.

In the mean time I had a lots of changes in my life but the most important is , I have owned my own company , Bigs Bilisim Ltd.Sti. “https://www.bigsbilisim.com”

This days , I have some spare time to write a blog , here is the my latest post

Node.Js Application on Docker.

I am managing a multinational companies infrastructure as a Linux / Windows admin and Devops Engineer . My customers ERP systems has no access to internet in any way. ERP systems internet access is not allowing even by a proxy because of the company policy.

Every morning one of trainee updating the all exchange rates in the ERP system manually. Time to time wrong entries or similar mistakes can cause couple of problems.

One day one IT Application teams member called me and can we write a small app for this manual operation. Because ERP system has got the ability of import xml files to ERP system . T.C. Mekez Bankası also publishing the rates as xml format. My answer was challenge accepted 🙂

Well I am not a programmer but I though, I can handle it some how.

I have googled couple of similar solutions and scenarios about the requested solution. I have found the node.js world.

I have wrote the code in one day , If you consider , I don’t have programmer background , it is good timing , I guess.

Here is the code of

index.js and package.json

Now when I have run the program in node js it is getting the exchange rates as in xml format by calling url;

Like ;

curl xxx.xxx.xxx.xxx:3000/exchangerates

When they have try to call this url via ERP systems it was successfully entering the Exhange Ratest in it.

Now the challenge is how this small program run in smooth environment without any effects.

This wasn’t a hard task to do it but this time I would like to made a fantasy;

Lets dockerize it.

I have share this program and my dockerize fantasy with the customer, They love it and they were really looking forward the taste it of container technology .

First I have install docker desktop to my machine ,

It was another challenge for me , but after watching couple of video , I have prepared the Docker file for this program.

Now I need to create the docker container on my desktop.

I have used this command:

docker build . -t ckocaman/exchange_rates:”Latest”

After creating the container I have push it to my docker hub account.

After pushed to hub , I can install on any containerized technology system.

At the beginning it was working on a single docker server , in these days it is a part of a kubernetes cluster as a pod and service.

This small application development story has been opened the application virtualization technology window to me. Well I am still learning it ( I hope every IT Guys keep learning every day !) , but I assume I can do better things with that .