The ReplicationController "mysql-rc" is invalid: spec.template.metadata.labels: Invalid value: map[string]string{"name":"mysql"}: `selector` does not match template `labels`

The error message indicates that the ReplicationController "mysql-rc" is invalid because the labels in the `selector` field do not match the labels in the `template` field of the ReplicationController's spec.

In Kubernetes, a ReplicationController uses labels to select and manage a set of replica Pods. The `selector` field in the ReplicationController's spec is used to match the labels of the Pods it manages, while the `template` field is used to define the desired state of the Pods.

To resolve this issue, you need to ensure that the labels defined in the `selector` field match the labels defined in the `template` field of the ReplicationController's spec. Double-check the labels in both fields and make sure they are identical.

Here is an example of a valid ReplicationController definition with matching labels:

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql-rc
spec:
  replicas: 3
  selector:
    matchLabels:
      name: mysql
  template:
    metadata:
      labels:
        name: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:latest
        ports:
        - containerPort: 3306

Make sure to replace the image, ports, and other configuration values according to your requirements.