Delete untagged image refs in Google Container Registry, as a service, with gcr-cleaner

GCR Cleaner deletes untagged images in Google Container Registry. This can help reduce costs and keep your container images list in order. GCR Cleaner is designed to be deployed as a Cloud Run service and invoked periodically via Cloud Scheduler. Clever! All commands to install this one are provided. gcr-cleaner →

How to build smaller Docker images

When you’re building a Docker image it’s important to keep the size under control. Having small images means ensuring faster deployment and transfers. Wish I had found this post before I started playing with Docker, as it is packed with solid advice which I found out “along the way” myself. In short: Find the right […]

Reverse-engineer a Dockerfile from a Docker image with dfimage

Might come in handy: Similar to how the docker history command works, this Python script is able to re-create the Dockerfile (approximately) that was used to generate an image using the metadata that Docker stores alongside each image layer. $ docker pull laniksj/dfimage Using default tag: latest latest: Pulling from dfimage $ alias dfimage=”docker run […]

Easily Start and Stop Docker Compose Projects with Captain

Jens Segers has created a handy shell script to easily start/stop Docker Compose based projects: Captain searches for docker-compose projects in your $HOME folder and allows you to start and stop those projects by passing a part of the parent directory name. Let this small recording of Captain in action convince you: Captain → Related: […]

Fix for the Android Emulator (Android Simulator) crashing during launch

UPDATE 2017.08.03: This should be fixed with the release of HAXM 6.1.1. Make sure you’re running the latest version of Android Studio On a recent project I was working on, I wasn’t able to start the Android Emulator/Simulator anymore from within Android Studio. Every time I launched it from Android Studio it would start, but […]

LocalStack – A fully functional local AWS cloud stack

At work we’ve been using several separate docker images – such as instructure/fake-s3 and airdock/fake-sqs, orchestrated by docker-compose – to run a few of the Amazon Web Services locally. LocalStack provides the whole lot in one: LocalStack provides an easy-to-use test/mocking framework for developing Cloud applications. Currently, the focus is primarily on supporting the AWS […]

Prevent time drift in Docker with docker-time-sync-agent

Today, at work, a colleague of mine ran into some time issues with his Docker containers: the time was clearly off. Turns out it’s a common problem: Docker’s daemon fails to update the VM’s time after computer wakes up from sleep. The result is that VM’s clock will be set to a past time. This […]