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Techniques, Pitfalls, & Best Practices by Daniel Azuma Ready to containerize your Rails application? Then this session is for you. We'll walk through the process of deploying a nontrivial Rails app to Kubernetes, focusing on effective container design. You'll learn techniques and best practices for constructing images and orchestrating your deployment, and you'll come away understanding how to optimize the performance, flexibility, and security of your containerized application. This is a sponsored talk by Google Cloud Platform.
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This video presentation by Daniel Azuma at RailsConf 2018 discusses containerizing Ruby on Rails applications with an emphasis on best practices, techniques, and common pitfalls. The session covers the fundamentals of Docker and Kubernetes, catering to varied experience levels, although it is not a beginner tutorial. Key points include: - **Understanding Containers**: Containers provide isolation by sharing the underlying operating system kernel while isolating filesystem, memory, and process space. - **Docker Images**: An image serves as a template for creating containers, primarily consisting of filesystem snapshots, and is built using a Dockerfile. Understanding and optimizing the base image used is crucial for effective application deployment. - **Best Practices for Image Creation**: - **Minimizing Size**: Important for resource efficiency during build and runtime. Use techniques like combining commands in a single RUN instruction to avoid unnecessary buildup of data layers. - **Multistage Builds**: This allows building an application in one stage and then creating a smaller image with only the required runtime files. - **Application Settings**: Configure locale settings to prevent encoding issues and avoid running applications as root for improved security. - **Use Exec Form**: It is advisable to use the exec form of commands in Dockerfiles when launching processes to ensure proper handling of signals. - **Production Considerations**: Containers help ensure predictability and resource management by setting fixed constraints for CPU and memory. Logs should be directed outside of containers for accessibility and monitoring. In conclusion, effectively containerizing a Rails application hinges on a combination of understanding Docker best practices, optimizing images, and adhering to security protocols. This session was sponsored by Google Cloud Platform.
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