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kubectl

Kubectl get deployments shows No resources found in default namespace

I am trying my hands on Kubernetes and I tried to deploy an image into k8s service

root@KubernetesMiniKube:/usr/local/bin# kubectl run hello-minikube --image=k8s.gcr.io/echoserver:1.10 --port=8080
pod/hello-minikube created

root@KubernetesMiniKube:/usr/local/bin# kubectl get pod

NAME             READY   STATUS    RESTARTS   AGE
hello-minikube   1/1     Running   0          16s

root@KubernetesMiniKube:/usr/local/bin# kubectl get deployments

No resources found in default namespace.

Why i am seeing No resource found but actually there is a resource running inside default namespace.

Solution

  • When you are using $ kubectl run it will create a pod. In your example thats exactly what happned, it created pod, named hello-minikube.

    pod/hello-minikube created

    If you want to create deployment

    Deployments represent a set of multiple, identical Pods with no unique identities. A Deployment runs multiple replicas of your application and automatically replaces any instances that fail or become unresponsive.

    you can do it using command:

    $ kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10 --port=8080
deployment.apps/hello-minikube created
user@cloudshell:$ kubectl get deployments
NAME             READY   UP-TO-DATE   AVAILABLE   AGE
hello-minikube   1/1     1            1           8s

    You can also create deployment using YAML. Save YAML from this documentation example and use kubectl apply.

    $ vi nginx.yaml 

<paste proper YAML definition. Also you can use nano editor, or download ready yaml>

user@cloudshell:$ kubectl apply -f nginx.yaml
deployment.apps/nginx-deployment created
$ kubectl get deployments
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
hello-minikube     1/1     1            1           3m48s
nginx-deployment   3/3     3            3           64s

    Please let me know if you have further questions regarding this answer.