All Stories

Multiple Docker Compose files in the same directory

Having multiple Docker Compose files in the same directory clearly is not a good idea, although I could see the use case if you are working on multiple different projects with custom ...

In Docker, Mar 03, 2022

Fix 'fallocate failed: Operation not supported'

While creating a swap on your Linux machine, executing sudo fallocate -l 1G /swap-file-name may throw fallocate failed: Operation not supported. Here I’m going to show you a quick fix...

In Linux, Mar 02, 2022

vars_files vs include_vars in Ansible

In the last Ansible post I’ve noted that there’s a difference when choosing between vars_files and include_vars. So, let’s explore the differences on a surface level.

In Ansible, Mar 01, 2022

How to install Podman on Ubuntu 21.10

In this tutorial, I’m going to show how to install Podman on Ubuntu 21.10 using the default Ubuntu 21.10 packages. Previously we clarified that installing Podman with the default Ubun...

In Podman, Ubuntu, Feb 28, 2022

How to deal with 'AnsibleUndefinedVariable: ... is undefined' error

Although Ansible has a low learning curve, obviously there’s always a big difference between learning on your own versus working on a medium to large scale size (enterprise) projects....

In Ansible, Feb 27, 2022

How to install Redis on Ubuntu 21.10

Using Redis as popular caching storage and also persistent key value database is always a good idea. Here I’m going to show you how to install it on a fresh Ubuntu 21.10 instance.

In Redis, Ubuntu, Feb 26, 2022

How to flush the DNS cache from the CLI

Clearing the DNS cache usually fixes issues related to not resolving new or updated existing domain records. Let’s see how it’s done from the command line though.

In DNS, Feb 25, 2022

MySQL fix: 'Waiting for table metadata lock'

Working with high load SQL queries or big transactions, you may face: Waiting for table metadata lock. Here I’m going to list some useful solutions that might help you.

In MySQL, Feb 24, 2022

How to fix 'WARNING: Connection pool is full' in Docker Compose

If you have been working with Docker Compose stacks for a while, you might have come across the following warning message: WARNING: Connection pool is full, discarding connection <...

In Docker, Feb 23, 2022

How to install Docker Compose on Ubuntu 21.10

This article is strictly focused on installing docker-compose on Ubuntu 21.10, so please make sure that you have Docker installed before jumping on the installation steps.

In Docker, Ubuntu, Feb 22, 2022