Summary of 7 Design Principles for Containers | Cloud Native Container Design | Tech Primers
Key Principles Explained:
- Single Concern Principle: Each container should focus on a single concern or functionality. This allows for easier replacement and scalability. An example given is using a single Envoy container to handle logging, monitoring, and proxying, rather than multiple containers.
- High Observability Principle: Applications should be treated as black boxes with APIs that allow for monitoring. This includes exposing health checks, metrics, and logs, which can be collected by monitoring tools like Prometheus and Grafana.
- Lifecycle Conformance Principle: Applications must handle lifecycle events (like start and shutdown) effectively. This involves responding to system events like SIGTERM and SIGKILL to manage resource cleanup and application readiness.
- Image Immutability Principle: Any change in the application should result in a new container image. The same version of the image must be used across all environments to ensure consistency.
- Process Disposability Principle: Containers should be ephemeral and able to start quickly. Applications should maintain externalized state to allow for rapid scaling and recovery from failures.
- Self-Containment Principle: A container must include everything it needs at build time, including dependencies and configurations, while relying on platform-specific configurations during runtime.
- Runtime Confinement Principle: Each container should declare its resource requirements (CPU, memory) at startup to prevent resource starvation and maintain application stability.
Conclusion:
The video emphasizes that adopting these principles can help in creating a robust and mature cloud-native container landscape. The speaker encourages viewers to engage with the content and subscribe for more insights.
Main Speakers/Sources:
- Tech Primers
- Red Hat's white paper on cloud-native container design
Notable Quotes
— 10:10 — « The biggest reason why we containerize our application is that containers need to be ephemeral and it needs to be started as quickly as possible so that you can replace one container with another container at any point in time. »
— 12:57 — « Every container needs to declare its own resources and its requirements so that it needs to be passed to the platform which on which it is running on. »
— 15:10 — « Cloud native is more than just an end state; it's a way of working and improving your application by following predefined principles and patterns. »
Category
Technology