30.12.2025 Kubernetes Class Notes

 
kubectl exec
---------------
it is kubectl command 
which is used to enter into "Pod" and "Container" also

how to enter into my container
-------------------------------------
kubectl exec -i -t kkpod1 -c kkcon1 --  /bin/bash
kubectl exec -it kkpod1 -c kkcon1 -- /bin/bash

1... interactive  -i  --user can able to interactive with terminal 
2... terminal -t      --provides kind of terminal setup
3... /bin/bash        --provides bash environment 
4... -- (two hypens)  --it separates kubectl commands and arguments from     the other commands
5... -c (container)   --it specifies container 

cluster--->nodes--->pods---->containers---->application+deps

1.cluster
---------
the overall Kubernetes environment
where we have multiple nodes

2.Nodes
-------
it is nothing but a virtual machine(server)
that holds multiple pods

3.pods
---------
it is a place
that holds multiple containers
smallest deployable unit in the Kubernetes cluster
that hols multiple containers

4.containers
--------------
it is a place
where we store our application and deps also

how to access your application 
------------------------------------
there are different ways to access application 
1. port forwarding
2. service
3. Direct Pod Access
4. Ingress