After that, you mount the ConfigMap as a Volume in your Pod's YAML specification. This lets you create that ConfigMap like any other Kubernetes resources using `kubectl apply -f $file.yaml`.
My favourite way is to define the ConfigMap dictionary in a YAML file. It's simpler and easier for when you're starting to learn about ConfigMaps. The official documentation waaay overcomplicates this.
#Mapproxy .yaml get value from environment how to
How to create a ConfigMap in YAML? How to mount a ConfigMap as a Volume?ĭefining the ConfigMap in YAML and mounting it as a Volume is the easiest way to use ConfigMaps. Third, containers in the Pod reference the ConfigMap and use its values. Second, a ConfigMap is created and added to the Kubernetes cluster. Here's a quick animation I made showing how a ConfigMap works in Kubernetes.įirst, you have multiple ConfigMaps, one for each environment. Store connection strings, public credentials, hostnames, and URLs in your ConfigMap. This lets you change easily configuration depending on the environment (development, production, testing) and to dynamically change configuration at runtime.Ī ConfigMap stores configuration settings for your code. It is an important part of creating a Twelve-Factor Application.
#Mapproxy .yaml get value from environment code
Use a ConfigMap to keep your application code separate from your configuration. Why would you use a ConfigMap in Kubernetes? ) the key lets you get and set the configuration value. Like with other dictionaries (maps, hashes. Kubernetes provides these values to your containers. This dictionary consists of key-value pairs of strings. What is a ConfigMap in Kubernetes?Ī ConfigMap is a dictionary of configuration settings. Then, you'll learn how to mount them in volumes and use them as environment variables. We’ll teach you how to create ConfigMaps. With this guide, tutorial, and examples, you’ll learn how to use ConfigMaps in Kubernetes. If you're using Kubernetes, the answer is ConfigMaps. How do you manage your application's configuration? For a Python or Node.js application, where do you store configuration? How do you set connection strings, analytics keys, and service URLs?
Ultimate Guide to ConfigMaps in Kubernetes