Home > Article > Backend Development > How to Deserialize Kubernetes YAML Files into Go Structs: Why Do I Get the Error \"no kind \'Deployment\' is registered for version \'apps/v1beta1\'\"?
Problem:
Deserialize a Kubernetes YAML file into a Go struct.
Error Encountered:
no kind "Deployment" is registered for version "apps/v1beta1"
Solution:
To resolve the error, you need to import the necessary Kubernetes schema package. This instructs the decoder which types it should consider when deserializing the YAML.
Import the following package:
<code class="go">_ "k8s.io/client-go/pkg/apis/extensions/install"</code>
Reason:
The Kubernetes schema is not automatically registered with the decoder. By importing the install package, you explicitly register the schema for the extensions/v1beta1 API group, which includes the Deployment resource type.
Complete Working Example:
<code class="go">package main import ( "fmt" "k8s.io/client-go/pkg/api" _ "k8s.io/client-go/pkg/api/install" _ "k8s.io/client-go/pkg/apis/extensions/install" ) var service = ` apiVersion: extensions/v1beta1 kind: Deployment metadata: name: my-nginx spec: replicas: 2 template: metadata: labels: run: my-nginx spec: containers: - name: my-nginx image: nginx ports: - containerPort: 80 ` func main() { decode := api.Codecs.UniversalDeserializer().Decode obj, _, err := decode([]byte(service), nil, nil) if err != nil { panic(err) } fmt.Printf("%#v\n", obj) }</code>
Note:
In the updated example, the Deployment resource is defined using the extensions/v1beta1 API group, which is the correct API group for the Deployment resource in Kubernetes versions prior to 1.9. For Kubernetes 1.9 and later, you should use the apps/v1 API group instead.
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