Execute Commands Inside The Kubernetes Pod

Here, we are using Minikube setup Kubernetes cluster. Firstly Download the software as per your supporting System Configurations and then follow the below steps to execute the commands inside the Kubernetes Pod.

Step 1: Start A Minikube.

Start the minikube software with the following command:

$ minikube start

• On running the above command `minikube start`, Minikube start the program and set up the single node kubernetes cluster, the below screenshot shows its execution flow.

Step 2: Verify whether the minikube is running or not with the following command `minikube status`

$ minikube status

• Now we have to deploy a pod, we are going to use a pod that will be running an image of NGINX inside it.

Step 3: Run the kubernetes pod on using nginx image with the kubectl run command as shown below:

 $ kubectl run <pod_name> --image=<your_image_name>

• On Running the above command, kubectl will create a pod with nginx image extracting from the Docker hub. You can see its creation as a result after running the command on the below screenshot.

• The above command will create a pod inside your minikube. 

Step 4: For viewing, list the all pods in the default namespace by the following command:

 $ kubectl get pods

• The above command list out the all the pods in the kubernetes, with the you can know the status of your created pod and its age of creation. The below screenshot illustrates it clearly.

• Now that our pod is created, let us enter inside our pod and run some commands.

Step 5: Connecting to the Minikube environment with ssh protocol by using the following command:

 $ minikube ssh

• On Executing this command, It will help you landing in minikube interactive environment from your local environment. You can understand it from seeing the hostnames in the below screenshot.

Step 6: Check the list of all the running containers inside the Minikube environment with the following command.

 $ docker ps -a

• The above command list out with displaying all the containers that are created with kubectl from local environment to the Minikube.

• From here we will get access to inside the Nginx-pod and run some commands with the following steps.

Step 7: Get inside the nginx pod container with its container_name or container_id knowing from the above step command `docker ps -a`. The following command helps you in going inside the nginx pod container.

$ docker exec -it <Id_of_container> /bin/bash

• Now we are inside the Nginx-pod, let us run a few shell commands like ls, pwd, and cd.

Outputs Of Shell Commands Execution

• With Step 7 you are landed to inside the pod container, from the you can run the shell commands here the below screenshots shows its execution practically.

So, This is how we can use the minikube to deploy a pod and run a command inside it.

In Kubernetes, we create pods by adding an extra layer of information on containers. This Kubernetes in short is known as K8s, an open-source container orchestration tool developed by Google. It is used to orchestrate the containers for bringing Agility in software deployment through scaling, and management. Currently, it is being maintained by the cloud native computing foundation (CNCF).