namespace.yaml
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apiVersion: v1 kind: Namespace metadata: name: playgroundinyaml |
deployment.yaml
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apiVersion: apps/v1 kind: Deployment metadata: name: hello-world labels: app: hello-world namespace: playground1 spec: replicas: 4 selector: matchLabels: app: hello-world template: metadata: labels: app: hello-world spec: containers: - name: hello-world image: gcr.io/google-samples/hello-app:1.0 ports: - containerPort: 8080 |
Commands
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ssh aen@c1-master1 cd ~/content/course/m3/demos #Get a list of all the namespaces in our cluster kubectl get namespaces #get a list of all the API resources and if they can be in a namespace kubectl api-resources --namespaced=true | head kubectl api-resources --namespaced=false | head #Namespaces have state, Active and Terminating (when it's deleting) kubectl describe namespaces #Describe the details of an indivdual namespace kubectl describe namespaces kube-system #Get all the pods in our cluster across all namespaces. Right now, only system pods, no user workload kubectl get pods --all-namespaces #Get all the resource across all of our namespaces kubectl get all --all-namespaces #Get a list of the pods in the kube-system namespace kubectl get pods --namespace kube-system #Imperatively create a namespace kubectl create namespace playground1 #Imperatively create a namespace...but there's some character restrictions. Lower case and only dashes. kubectl create namespace Playground1 #Declaratively create a namespace more namespace.yaml kubectl apply -f namespace.yaml #Get a list of all the current namespaces kubectl get namespaces #Start a deployment into our playground1 namespace more deployment.yaml kubectl apply -f deployment.yaml #Creating a resource imperitively kubectl run hello-world-pod \ --image=gcr.io/google-samples/hello-app:1.0 \ --generator=run-pod/v1 \ --namespace playground1 #Where are the pods? kubectl get pods #List all the pods on our namespace kubectl get pods --namespace playground1 kubectl get pods -n playground1 #Get a list of all of the resources in our namespace...Deployment, ReplicaSet and Pods kubectl get all --namespace=playground1 #Try to delete all the pods in our namespace...this will delete the single pod. #But the pods under the Deployment controller will be recreated. kubectl delete pods --all --namespace playground1 #Get a list of all of the *new* pods in our namespace kubectl get pods -n playground1 #Delete all of the resources in our namespace and the namespace and delete our other created namespace. #This deletes the Deployment controller, the Pods...or really ALL resources in the namespaces kubectl delete namespaces playground1 kubectl delete namespaces playgroundinyaml #List all resources in all namespaces, now our Deployment is gone. kubectl get all kubectl get all --all-namespaces |