This is a pretty straightforward one. However as someone very much still learning about Spring Boot, this one threw me. A few days ago I added the spring-boot-docker-compose dependency to an existing Spring Boot project of mine, and when I tried to bring up the application I got the following error: I hacked about a … Read more
One of my projects that runs 24x7x365 is a web scraper. I’ve iterated on the approach several times, and what is currently working is to do the fetch and then save the entire HTTP response in a Postgres database. From various other projects, I can then query one central database and extract out data that … Read more
When your server is down, it’s stressful. I’ve just recovered from an issue with WordPress where the PHP container was crippling my server because – for reasons I cannot explain – connectivity to the database had just died. This actually happened to me on another server a few months ago, and I wasn’t that bothered … Read more
In this post, we’re continuing with our Spring Boot guestbook example, but this time we’ll be adding persistence by integrating a PostgreSQL database. While the overall process is fairly straightforward and well-documented, there were a few things that caught me off guard along the way. One challenge I faced was integrating Spring Data repositories with … Read more
Today I needed access to an environment variable whilst building a Docker image from a Dockerfile. To make the example concrete, I wanted to get access to the Git commit hash exposed in a CircleCI build. The idea was to then use this commit hash inside my build as a cache buster on client side … Read more
Yesterday I got hit with the double whammy. I tried to upgrade GitLab to v16.3.4 as part of their recent critical security release when I realised that the GitLab server was running version 15.x (I don’t remember which minor release), so first I would need to install 16.0.0, then get up to 16.3.4. This, it … Read more
This one cost me a whole bunch of time. Annoyingly I got a Docker version of Postgres 16 working on one machine, but a couple of days later I needed to update another and I hit this error: Somewhat fortunately for me, this time around, was that this was a test setup I have used … Read more
I’ve come across the select case syntax in Postgres before, but never had to figure out what it does. However on my current project I was faced with a query where I had to understand it, so I went about setting up a little local demo file to figure out how to use case in … Read more
I suspect this problem won’t impact too many people. However, it caught me out so I figured I’d document it and share the fix. Heads up: you’re probably missing a next.config.js file. Or perhaps you have one, but it’s not got the right setting. OK, I will first share my config: That’s my Dockerfile in … Read more
Today I hit on an issue whereby I tried to bring up a new Docker project, using a named network, and hit the following error: Which isn’t the most helpful thing in flagging that I had hit the default maximum number of networks that a Docker host can have active. There’s a potential quick fix … Read more