Best Engineering Practices for Kubernetes

Tue, 12/06/2022 - 15:54

Adopt these 7 practices when implementing Kubernetes

Kubernetes is a popular open-source container orchestration platform that helps organizations manage and deploy their applications at scale. It has become the de facto standard for running containerized applications in production environments.

However, implementing Kubernetes can be challenging, and there are several best practices that organizations should follow to ensure successful deployment and management of their applications.

  1. Start small and iterate: It's essential to start with a small deployment and gradually increase the number of nodes and services as needed. This approach allows organizations to learn and adapt to Kubernetes without overwhelming themselves with a massive deployment right away.
     
  2. Follow the principle of immutability: One of the key principles of Kubernetes is immutability, which means that once an application is deployed, its configuration should not be changed. Instead, any changes to the configuration should be made by deploying a new version of the application. This practice has several benefits. First, it ensures that the application is always in a known, stable state. Second, it makes it easier to roll back to a previous version if there are any issues with the new deployment. And third, it makes it easier to track changes and understand the history of an application.
     
  3. Use declarative configuration: Kubernetes uses a declarative configuration model, which means that you define the desired state of your application, and the Kubernetes system will automatically make sure that the application matches that desired state. This is in contrast to an imperative configuration model, where you have to manually specify the steps to bring the application to its desired state. Declarative configuration is more flexible and easier to manage, as it allows you to make changes to the desired state without worrying about the underlying implementation details.
     
  4. Use namespaces: Kubernetes namespaces allow organizations to divide their resources into different logical groups, thus enabling users to manage and access their applications in a more organized and scalable manner. Namespaces provide a way to divide cluster resources between multiple teams or projects, which is particularly useful for organizations that have multiple teams working on different projects, as it allows each team to have its own isolated environment within the cluster.
     
  5. Use labels and selectors: Labels and selectors are powerful features of Kubernetes that allow users to group and filter their resources. Labels are key-value pairs that can be attached to Kubernetes objects, such as pods, services, and deployments. Selectors are used to filter and query objects based on their labels. By using labels and selectors, you can group related resources together and easily perform operations on those groups. For example, you can use labels to identify the environment (e.g. production, staging, development) and the component (e.g. frontend, backend, database) of a resource, and then use selectors to perform operations on all resources with a particular label.
     
  6. Use config maps and secrets: Kubernetes ConfigMaps and Secrets are used to manage configuration data for applications. ConfigMaps are used to store configuration data that is not sensitive, such as application settings and environment variables. Secrets are used to store sensitive data, such as passwords and API keys.
    By using ConfigMaps and Secrets, you can keep configuration data separate from your application code, which makes it easier to manage and update the configuration. Additionally, using these Kubernetes resources allows you to store sensitive data securely, as they are encrypted at rest and in transit.
     
  7. Use Kubernetes API and command-line interface: Kubernetes provides a robust API and a command-line interface (CLI) that allows users to manage and access their applications. With this feature, users can automate their deployment and management processes and reduce the risk of human error.

In conclusion, following these best practices when using or implementing Kubernetes can help organizations deploy and manage their applications efficiently and effectively. It's essential to start small, use declarative configuration, and leverage Kubernetes' powerful features such as namespaces, labels, and selectors to ensure successful deployment and management of their applications.


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