Docker is an unbelievably popular technology right now. It’s extremely flexible and can be used at every stage of an application’s lifecycle. In fact, a Docker container and the application running inside it can move together through the application lifecycle all the way to production. In this post, we’re going to cover some of the core concepts of Docker by looking at how you can migrate an existing WordPress installation into Docker (or “Dockerize” it). For the purposes of this article, I’ll be creating Dockerized copy of this very blog. Before we get started, Let’s get started!
I was working on a project at work last week which required me to use the MySQL Community Server distribution of MySQL. This was my first time ever using this variant of MySQL Server, but I didn’t see any fundamental differences between it and more mainstream versions like MariaDB, etc. Unfortunately, I would soon be proven wrong. As I was going through my usual database server deployment checklist, I started the mysql_secure_installation script and was unable to use it to set the password for the root user. This seemed strange to me since, to my knowledge anyway, MySQL shipped with no root password set and relied on the user to set one. Apparently, that’s not the case with MySQL Community Server. Instead, MySQL Community Server generates a temporary password for the root user and applies it during initial start-up. After a bit of Googling I found that the generated password is logged to /var/log/mysqld.log so we can use grep to quickly figure out what it is. To determine the default root password generated by MySQL Community Server during initial start-up run the following command:
grep 'temporary password' /var/log/mysqld.log
Then run mysql_secure_installation and follow the prompts as you normally would.