Articles
Countries tracker
Nagoya Global Friends is an international community in Nagoya whose events gather people from all over the worlds. In order to visualize the various countries represented, I designed a simple Firebase application. The application allows users to register their home country, which gets stored in a Firestore database.
Node.js testing for multiple environment variables
Some applications might require the same codebase to be tested with different sets of environment variables. This article proposes a simple way to do so.
Persistent HDD APM settings
An HDD can be configured to spin down after a certain time via the APM settings which can be managed by smartctl. Unfortunately, those settings do not persist after a reboot. This article presents a solution to the problem
Generating certificates for an Aruba Instant AP using pfSense
Aruba IAP can use custom certificates when serving the Web UI over HTTPS. Those certificates can be generated, among others, using pfSense. This can be useful when trying to get rid of browser warnings regarding untrusted HTTPS connections
Auto CRUD
Most web applications that manage data in a database perform at least some form of create, read, update or delete (CRUD) operations on stored records. Moreover, web applications also often expose those operations via a REST API. Most database tables - corresponding to the entities manged by the application - need their own CRUD controller and set of HTTP endpoints. Because of this, large applications can quickly become tedious to develop and maintain. However, the logic for each table is usually quite similar. Auto CRUD has been developed to reduce this workload.
GitLab Microk8s >1.24 certificate based integration
With newer versions of Microk8s, its GitLab integration changes slightly. Here are the key differences
A router out of a desktop PC with pfSense
My router needed to be replaced. However, instead of buying an off-the-shelf router, I decided to give pfSense a go and install it on a second-hand desktop computer.
Solving Kong latency problems in Kubernetes
Kong is a popular API gateway that can be used as a reverse proxy for clients to access back-end services. It can be run as a Docker container and, as such, can be deployed to Kubernetes. However, when doing so, requests might be severely impacted by unusually high latency. This can be solved by configuring the order in which Kong resolves DNS records.
IoT デバイス制御アプリ
IoTデバイスを盛業するために作ったWEBアプリ。パソコンでも、スマホでも使えます
IoT キャッシュレス支払いシステム
社内にコーヒーサーバーを設置したとする。コーヒー代はもちろん飲んだ人が負担をするが、だれが何杯飲んだかを管理するための購買システムが必要になる。</p><p>そこで、簡単に使える購買システムを開発した。</p><p>使い方は、社員はあらかじめ入金をして、社員証をデバイスにかざしてプリペイドカードのようにコーヒーの元を購入することができる