The controller of the configMap of the pod's volume without the Name field parameter reports an error

[zerunhu]

I want to build a pod in the controller, this pod needs a volume, and the type of the volume is a comfigmap, so I define a pod in the following way, omitting other unimportant fields, and only keeping the volume ↓↓↓
`
import corev1 "k8s.io/api/core/v1"
Volumes: []corev1.Volume{
{
Name: podVolumeName,
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: zapi.Spec.ConfigMap,
},

		        DefaultMode:         &configMapMode,
	        },
        },
    },

},
`
The problem is that when I use kubernetes to create a pod, if I need to bind a volume to a configmap, then I must have a configMap.name field, as I saw in the kubernetes documentation ↓↓↓

But the ConfigMapVolumeSource object in the k8s.io/api/core/v1 package I referenced does not have a name field. I don't know if this is reasonable. I refer to the code of other operators, such as the prometheus operator. When they build a pod and need to mount the volume of the configmap, the name is not defined in pod.Spec.Volumes.VolumeSource.configMap, Only use this field LocalObjectReference. But if I don't define Name in my code and execute make install and make run, my controller will report an error, which is obviously an error that the pod cannot be created without this name field. I don't know what is causing this and how can I fix it, thanks a lot for the help from the team ↓↓↓

My environment is as follows ↓↓↓
Kubernetes Version ↓
1.18
Kubebuilder Version ↓
[root@VM-56-84-centos ~/operator/mycrd]# kubebuilder version Version: main.version{KubeBuilderVersion:"3.2.0", KubernetesVendor:"1.22.1", GitCommit:"b7a730c84495122a14a0faff95e9e9615fffbfc5", BuildDate:"2021-10-29T18:32:16Z", GoOs:"linux", GoArch:"amd64"}

go version and go.mod ↓
`
go 1.16

require (
k8s.io/api v0.22.1
k8s.io/apimachinery v0.22.1
k8s.io/client-go v0.22.1
sigs.k8s.io/controller-runtime v0.10.0
)
`

[camilamacedo86]

Hello,

It seems like you're correctly trying to associate a ConfigMap to a Volume in a Pod specification. The Name field you're referring to indeed does not directly exist under the ConfigMapVolumeSource object. Instead, it is present under the LocalObjectReference object, as you've shown in your code.

To fix you would need to probably:

ConfigMap: &corev1.ConfigMapVolumeSource{
    LocalObjectReference: corev1.LocalObjectReference{
        Name: zapi.Spec.ConfigMap,
    },
    DefaultMode: &configMapMode,
}

Here, the Name field inside LocalObjectReference is what maps to the name of the ConfigMap you want to mount.

I hope that answered your question.
I am closing this one since it was open for a long time ago.
However, if you still facing issue please feel free to re-open it.