Manuel Bogner's Blog – Page 2 – Solutions to everyday IT problems

Homebrew Cask Update Tool: Your macOS Equivalent to Linux’s APT

If you’re a macOS user who appreciates the convenience of package management tools like APT on Linux, then Homebrew Cask Update Tool is a game-changer you won’t want to miss. This nifty tool, available at https://github.com/buo/homebrew-cask-upgrade, brings the simplicity and efficiency of Linux package management to your Mac. Homebrew Cask Update Tool makes updating your […]

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get shell for docker vm on mac

Docker / Manuel Bogner

For setting values on the docker vm on your mac you need to get a shell. Elastic has some statements online that don’t work on latest MacOS (14.1.1 + docker desktop 24.0.6). To get a shell you can use this command:

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Inspect docker container image without starting it

Docker / Manuel Bogner

These two commands result in a file containing a list of all files included in the container image. You can also export the complete container into a tar file:

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CORS configuration for REST api accessed from browser

Java, Kotlin / Manuel Bogner

To allow requests against a Spring Boot REST API from a website it is necessary to configure CORS properly. In case you don’t know your client URLs you can allow all clients by adding a mapping like the following in your Kotlin project: This allows access to all endpoints from all origins via GET, POST

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keycloak in docker compose with healthcheck

Docker / Manuel Bogner

Docker images from quay.io/keycloak/keycloak don’t contain any commands for a usual healthcheck and installing software is also not trivial. In a discussion on https://github.com/keycloak/keycloak/issues/17273 I found a solution that checks /proc/net/tcp for an open port 8080. That file contains all open ports in hex format. cat and grep are included in the image. So a

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docker pull proxyconnect tcp: dial tcp: lookup http.docker.internal on 192.168.65… timeout

Docker, Mac / Manuel Bogner

After upgrading to macOS 14.1 my docker installation stopped woring and when I tried to pull an image it answered with the following error message: 192.168.65.0/24 is the configured docker internal network of Docker Desktop. It was running on defaults and I wasn’t aware of any manual changes. DNS of my host system worked properly:

docker pull proxyconnect tcp: dial tcp: lookup http.docker.internal on 192.168.65… timeout Read More »

spritpreisrechner.at OpenAPI Spec

General / Manuel Bogner

spritpreisrechner.at is a project from e-control and Austrian government to gather fuel prices all over the country. There is a Swagger 2 specification of the API by e-control to use the data. But the host used in that spec doesn’t exist anymore nor should you use swagger 2 for a project in 2023. I updated

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Start PostgreSQL correctly with docker-compose.yml

Development, Docker / Manuel Bogner

I’m using PostgreSQL in a lot of projects and in my dev environments I always run it with docker-compose. But configuring it properly isn’t so clear if you want to use proper time zone and a health check. Attached the config with a custom database name “db” and an admin user. With this pg_isready is

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Scheduled Facebook posts via Bash

Media / Manuel Bogner

I was looking for an easy way to create scheduled posts on facebook. Though I didn’t find a fully automated way I was able to create a process that only needs manual steps every 60 days. With the app created on facebook developer pages I first need the clientId (appId) and clientSecret (appSecret). The first

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Convert MP4 to webm with ffmpeg

Media / Manuel Bogner

There is no need for extra software for converting video files as long as you’re not afraid of using the shell of your Linux or MacOS. ffpmeg can do a lot for you. For streaming and uploading videos, WebM is the better option because it’s highly compatible with modern browsers and popular for HTML5. For higher-quality

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