Learn how to troubleshoot and resolve the "no matches for kind "Deployment" in version "extensions/v1beta1"" error in Kubernetes.
The error "no matches for kind 'Deployment' in version 'extensions/v1beta1'" typically occurs when you try to use an older Kubernetes YAML file with a newer Kubernetes cluster. This happens because Kubernetes has moved away from the 'extensions/v1beta1' API version for Deployments and now uses 'apps/v1'.
The error "no matches for kind 'Deployment' in version 'extensions/v1beta1'" typically occurs when using an older Kubernetes YAML file with a newer Kubernetes cluster version.
Here's why:
extensions/v1beta1
API version for Deployments in favor of apps/v1
.To fix this:
Update your YAML file:
apiVersion: extensions/v1beta1
to apiVersion: apps/v1
# Old:
apiVersion: extensions/v1beta1
kind: Deployment
# New:
apiVersion: apps/v1
kind: Deployment
Apply the changes:
kubectl apply -f your-deployment.yaml
This ensures your Deployment uses the correct, supported API version for your Kubernetes cluster.
The code demonstrates a Kubernetes deployment issue. An initial deployment attempt using "extensions/v1beta1" API version fails with "no matches for kind 'Deployment'" error. The issue is resolved by updating the API version to "apps/v1" in the deployment YAML file, resulting in a successful deployment.
File: old-deployment.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.14.2
Attempting to deploy with old-deployment.yaml
:
kubectl apply -f old-deployment.yaml
Output:
error: unable to recognize "old-deployment.yaml": no matches for kind "Deployment" in version "extensions/v1beta1"
File: fixed-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.14.2
Deploying with fixed-deployment.yaml
:
kubectl apply -f fixed-deployment.yaml
Output:
deployment.apps/nginx-deployment created
This example demonstrates the error encountered when using the deprecated extensions/v1beta1
API version for Deployments. By updating the apiVersion
to apps/v1
in fixed-deployment.yaml
, the deployment is successful.
kubectl --validate
or online YAML validators to check your Kubernetes YAML files for errors and deprecated API versions before applying them.Error Message | Cause | Solution |
---|---|---|
no matches for kind 'Deployment' in version 'extensions/v1beta1' |
Using an outdated Kubernetes YAML file with a newer cluster version. Kubernetes has deprecated extensions/v1beta1 for Deployments in favor of apps/v1 . |
1. Update YAML file: Change apiVersion: extensions/v1beta1 to apiVersion: apps/v1 . 2. Apply changes: Run kubectl apply -f your-deployment.yaml . |
To avoid compatibility issues when working with Kubernetes, ensure your YAML files use the correct, current API versions supported by your cluster. Regularly check for deprecated APIs and update your deployments accordingly. Leverage tools like kubectl get deployments --all-namespaces -o yaml
to identify the correct API version and utilize YAML validation tools to catch errors early. For managing multiple deployments, consider Helm or Kustomize for streamlined templating and versioning. By staying informed about API changes and adopting best practices, you can ensure smooth and error-free Kubernetes deployments.