Semantics and accessibility are a really important part of developing web pages. This is not only for users with disabilities, but improving accessibility makes your content easier to share with everyone.
I recently discovered pa11y — an open source project that helps users to set up (for free) an accessibility dashboard of their sites. This is a self-hosted nodeJS + mongoDB app, which means you can set it up internally behind a firewall and compare sites in development. It’s also available on Docker and is fully-customizable. You can edit the front end (written in Less) to match any design system and add any features you’d like.
Out of the box, pa11y comes with:
- Filter system for tasks
- A visual interface for adding, editing, and removing tasks
- Overview panel of errors, warnings, and notices based on your selected WCAG preferences (WCAG2AA is default)
- Downloadable JSON and CSV data
- 30 days of data stored by default
- Detailed explanation of accessibility violations
Those are a lot of awesome things! By default, it looks like this (you can see it live at pa11y.una.im):
Okay, so I know I have a little bit of cleanup work to do now on my sites. But before we go into shame 🔔 shame 🔔 mode, let’s learn how to set up our own!
Vitess is available as an open-source project and runs best in a containerized environment. With Kubernetes and Google Container Engine as your container cluster manager, it’s now a lot easier to get started. We’ve created a single deployment configuration for Vitess that works on any platform that Kubernetes supports.
In addition to being easy to deploy in a container cluster, Vitess also takes full advantage of the benefits offered by a container cluster manager, in particular:
- Horizontal scaling – add capacity by launching additional nodes rather than making one huge node
- Dynamic placement – let the cluster manager schedule Vitess containers wherever it wants
- Declarative specification – describe your desired end state, and let the cluster manager create it
- Self-healing components – recover automatically from machine failures
In this environment, Vitess provides a MySQL storage layer with improved durability, scalability, and manageability.
A Dockerfile that installs the latest Moodle, Apache, PHP, MySQL and SSH
Google Cloud Platform – QuickStart with Container-optimized Google Compute Engine images
Manage everything with Kubernetes is an open source implementation of container cluster management.
Docker EcoSystem mindmap: