April 2018
Intermediate to advanced
374 pages
8h 35m
English
Content preview from Kubernetes for Developers
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Exposing the configuration into your container images
There are two primary ways to expose configuration data into your container:
- Connecting the keys from one or more ConfigMaps into environment variables that are set for your Pod
- Kubernetes can map the data from one or more ConfigMaps into volumes that are mounted in your Pod
The primary difference is that environment variables are typically set once at the start of invoking your container and are generally simple string values, where as ConfigMaps mounted as data in volumes can be more complex and will get updated if you update the ConfigMap resource.
Note that no mechanism exists to explicitly tells your container that a ConfigMap value has been updated. As of version 1.9, Kubernetes ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.