Running Kubernetes pods

As with Docker, we can run a Kubernetes pod with the kubectl run command. Let's start with a simple web server example:

$ kubectl run httpd --image=httpd

We can verify the result by getting a list of Kubernetes pods, by running the kubectl get pods command:

$ kubectl get pods
NAME                      READY    STATUS    RESTARTS    AGE
httpd-8576c89d7-qjd62      1/1     Running    0          6m

Essentially, this pod is a Docker container inside our Minikube VM, and we can easily verify this. First, we need to ssh into Minikube VM with minikube ssh, and then run the docker ps command:

$ minikube ssh
$
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c52c95f4d241 httpd "httpd -g 'daemon ..." 12 minutes ago Up 12 minutes k8s_httpd-container_httpd_default_39531635-23f8-11e8-ab32-080027dcd199_0
...
<output omitted>
...

We can try to kill this httpd Docker container, but Kubernetes will automatically spawn the new one:

$ docker rm -f c52c95f4d241   

Check the container status one more time:

$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
5e5460e360b6 httpd "httpd -g 'daemon ..." 5 seconds ago Up 5 seconds k8s_httpd-container_httpd_default_4f5e05df-2416-11e8-ab32-080027dcd199_0
$ exit