interacting with pods

• everything in k8s is a yaml file, so are pods
• we can use several commands to interact with pods like - creating, deleting and editing pods
• we can also get inside a pod and do stuff - like ping other pods, checkout the file system of the pod, checkout the activity of the os and more!

# list pods with more info
kubectl get pods -o wide
 
# get all pods with all namespaces - shorter
kubectl get pods -o wide -A
 
# type this to get lots of yaml! 
# it is the pod definition that lives in the cluster
kubectl get pods nginx-aniket -o yaml
 
# edit pod (not recommended in prod or dev cluster)
kubectl edit pods nginx-aniket
 
# dry run client to get yaml (imp)
kubectl run nginx-yaml --image=nginx --dry-run=client -o yaml
 
# output yaml to a file to get started
kubectl run nginx-yaml --image=nginx --dry-run=client -o yaml > nginx-yaml.yaml
 
# creating/applying a pod definition
kubectl create -f nginx.yaml # only creates the pod
kubectl apply -f nginx.yaml # checks the differences and applies the same
 
# delete a pod
kubectl delete pod nginx-aniket
 
# get into a pod and open a shell!
kubectl exec -it nginx-aniket -- /bin/bash

Note: dry-run

none→ default client→ only generates yaml! server→ generates yaml and also runs it!

Links:

kubernetes pod kubectl

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