From a7fc8a146075805c0c4941652bcaf377943f4d1c Mon Sep 17 00:00:00 2001 From: Jordan Christiansen Date: Wed, 23 Feb 2022 09:59:49 -0600 Subject: Improve the error message for usused configMaps If you run `podman play kube` on a yaml file that only contains configMaps, podman will fail with the error: Error: YAML document does not contain any supported kube kind This is not strictly true; configMaps are a supported kube kind. The problem is that configMaps aren't a standalone entity. They have to be used in a container somewhere, otherwise they don't do anything. This change adds a new message in the case when there only configMaps resources. It would be helpful if podman reported which configMaps are unused on every invocation of kube play. However, even if that feedback were added, this new error messages still helpfully explains the reason that podman is not creating any resources. [NO NEW TESTS NEEDED] Signed-off-by: Jordan Christiansen --- docs/source/markdown/podman-play-kube.1.md | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'docs') diff --git a/docs/source/markdown/podman-play-kube.1.md b/docs/source/markdown/podman-play-kube.1.md index f85ea9046..389affc3a 100644 --- a/docs/source/markdown/podman-play-kube.1.md +++ b/docs/source/markdown/podman-play-kube.1.md @@ -72,9 +72,11 @@ disable builds. `Kubernetes ConfigMap` -Kubernetes ConfigMap can be referred as a source of environment variables in Pods or Deployments. +Kubernetes ConfigMap can be referred as a source of environment variables or volumes in Pods or Deployments. +ConfigMaps aren't a standalone object in Podman; instead, when a container uses a ConfigMap, Podman will create environment variables or volumes as needed. + +For example, the following YAML document defines a ConfigMap and then uses it in a Pod: -For example ConfigMap defined in following YAML: ``` apiVersion: v1 kind: ConfigMap @@ -82,14 +84,11 @@ metadata: name: foo data: FOO: bar -``` - -can be referred in a Pod in following way: -``` +--- apiVersion: v1 kind: Pod metadata: -... + name: foobar spec: containers: - command: -- cgit v1.2.3-54-g00ecf