Cannot connect to DB from a process inside Docker container ? This could fix it.
I had recently hit a blocker to production deployment, when my processes just won’t connect to my Cassandra DB from within their containers. This is how I...
Author: Kj
Kj [/.] Sreekumar programs computers as a hobby and profession. Into programming from his school days, Sree uses Codemarvels to key in facts and fixes he finds interesting while working on different projects. Some of the articles here give away a few shades of his philosophical leanings too.
Open ports in Ubuntu’s firewall using IP Tables
On the terminal, do the following to open port 80 sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT sudo iptables -F Persisting the rule changes across boot cy...
Make a new disk available in Ubuntu on AWS or Azure
To make a new disk you just added to the Ubuntu device, please go through the following steps – Check whats the /dev path of the disk. On terminal, run- Y...
Ubuntu : retain host-name change after a reboot
Problem: The newly set hostname reverts back to older one after reboot Reason : Hostname is reset by cloud-init Solution : Inactivate cloud-init. On terminal, k...
Machine Learning – the basics
Hey there ! So you are a programmer, wanting to master machine learning ? You are at the right place. Lets get started. So, what exactly is machine learning ? W...
Fixing Cqlsh Import Error
Problem: Running Cqlsh exits with the error : Fix: Set right python path KjKj [/.] Sreekumar programs computers as a hobby and profession. Into programming from...
Planning conversational Automation – Here’s what you should look for !
Are you planning to bring in conversational automation using AI to make your processes more cost effective and consistent ? There are certain things I would lik...
Fix for – W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Temporary failure resolving ‘archive.ubuntu.com’
Problem: apt-get update gives an error : [bash] W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Temporary failure resolving ‘ar...
View logs and debug a docker service
To debug why a container within a docker stack didn’t start, these commands will help [bash] #list all processes docker service ls #note the id of ...
How to install Docker Compose on Ubuntu 18.04 LTS
Here’s how to install docker-compose on Ubuntu LTS : Open terminal and run these commands [bash] sudo curl -L "https://github.com/docker/compose/rele...