Docker - Dkam's Blog

Dkam's Blog

Docker

A collection of 4 posts

TIL 20250228

Today I learnt that ALTER SYSTEM SET max_connections = 100; writes a new configuration file in the data directory for PostgreSQL, postgresql.auto.conf which takes priority over the values in the normal postgresql.config file. It's especially pointless to use ALTER SYSTEM for max_connections because you

Multiple Databases in One Postgres Container

Recently, some new Ruby Gems were released which aim to consolidate various supporting service for Rails such as Redis, into database backed systems. These gems are : solid_queue, solid_cache and solid_cable Here's how I setup SolidQueue, SolidCache and the SolidCable databases. Booko's databases run

Deploying Rails + SQLite with Kamal

Today I learnt about Kamal's ability to map Docker volumes into containers. When you're using SQLite, without using volumes, your SQLite database will be trapped inside your image, forever being replaced every time you deploy your app. Rails 8 seems to like storing SQLite databases in

Run Ghost in Docker compose

Experimenting with running Ghost in Docker compose