Change:
<!-- overview --> Many applications rely on configuration which is used during either application initialization or runtime. Most of the times there is a requirement to adjust values assigned to configuration parameters. <del> ConfigMaps is the kubernetes way to inject application pods with configuration data. </del> <ins> ConfigMaps are the Kubernetes way to inject application pods with configuration data. </ins> ConfigMaps allow you to decouple configuration artifacts from image content to keep containerized applications portable. This page provides a series of usage examples demonstrating how to create ConfigMaps and configure Pods using data stored in ConfigMaps.

Discussion:
This is a... [x] Bug Report Problem: The documentation mentions "optional" in the restrictions for configmap, but doesn't explain how to use it anywhere else in the documentation. You must create a ConfigMap before referencing it in a Pod specification (unless you mark the ConfigMap as “optional”). If you reference a ConfigMap that doesn’t exist, the Pod won’t start. Likewise, references to keys that don’t exist in the ConfigMap will prevent the pod from starting. Please see for the feature. It appears it got lost in the 1.5-1.6 upgrade. Proposed Solution: Restore the copy from that wrote. Page to Update:
For clarity, the copy from got removed here:
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/remove-lifecycle stale
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
/language en /remove-lifecycle stale /assign
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
/remove-lifecycle stale
/priority backlog
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
/remove-lifecycle stale
Stale issues rot after 30d of inactivity. Mark the issue as fresh with . Rotten issues close after an additional 30d of inactivity.

If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle rotten
/remove-lifecycle stale
/remove-lifecycle rotten
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
Relevant to /remove-lifecycle stale
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
This awesome feature is still missing in the documentation, Can someone please add it ?
were you thinking of opening a pull request? We'd be happy to help you with that.
/remove-lifecycle stale
/lifecycle frozen
/triage accepted
I don't see any updates; so unassigning you. Please feel free to assign, if you come back here again and are willing to work on it. Thank you! /unassign
/assign