03-pods.md

create the pod from your YAML file, use the kubectl create command:

kubectl create -f kubia-manual.yaml

Get pod description:

kubectl get po kubia-zxzij -o yaml

when creating a pod manifest from scratch, you can start by asking kubectl to explain pods:

kubectl explain pods
kubectl explain pods.spec 

Log of specififc container

docker logs <container id>
 kubectl logs kubia-manual
kubectl logs kubia-manual -c kubia

Enable Port forwarding

 kubectl port-forward kubia-manual 8888:8080

In a different terminal, you can now use curl to send an HTTP request to your

pod through the kubectl port-forward proxy running on localhost:8888:

curl localhost:8888

Providing Labels

kubectl create -f kubia-manual-with-labels.yaml

The kubectl get pods command doesn’t list any labels by default, but you can see them by using the --show-labels switch:

kubectl get po --show-labels

Instead of listing all labels, if you’re only interested in certain labels,

you can specify them with the -L switch and have each displayed in its own column

kubectl get po -L creation_method,env

Modifying labels of existing pods

Because the kubia-manual pod was also created manually, let’s add the creation_method=manual label to it:

kubectl label po kubia-manual creation_method=manual

Listing pods using a label selector

kubectl get po -l creation_method=manual

To list all pods that include the env label, whatever its value is:

kubectl get po -l env

And those that don’t have the env label:

kubectl get po -l '!env'

Using labels for categorizing worker nodes

kubectl label node gke-kubia-85f6-node-0rrx gpu=true

kubectl get nodes -l gpu=true

Delete a pod

kubectl delete po <pod_name>

Delete all the pods with label creation_method:manual

kubectl delete po -l creation_method=manual

Annotate a pod

kubectl annotate pods <podname> creator="Ashish"

see the annotation by urself

kubectl describe pod <podname>

namespaces

list all the namespaces

kubectl get ns

get all pods in a ns

kubectl get po --namespace kube-system

Create a namespace

kubectl create -f custom-namespace.yaml

OR

kubectl create namespace custom-namespace

Create a resource specific to a namespace

kubectl create -f kubia-manual.yaml -n custom-namespace