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KubeSail: Get your free Kubernetes Cluster

If you’re looking for free Kubernetes Cluster to play around then KubeSail is the right choice, its hosted Kubernetes provider and offers free managed namespace. With KubeSail you can deploy and host applications easily. In this post, we take look steps on how to deploy applications onto to KubeSail cluster.

KubeSail Logo

Image – KubeSail Logo

Once you have created your account on KubeSail, follow the below steps to deploy your applications.

Step #1 : Get Kubectl configuration

From the account setup tab, get the kubectl configuration.To recap on what is kubectl, this is the command-line interface through which we can interact with Kubernetes API.

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KubeSail Account Page

Image – KubeSail Account Page

Copy the contents of kubectl configuration and paste to your ~/.kube/config so that we can use kubectl to access our cluster.

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If you’re looking for quickstart on basic understanding of Kubernetes concepts, please refer earlier posts for understanding on Kubernetes & how to create, deploy & rollout updates to the cluster.

Step # 2: Create deployment

Before creating deployment run kubectl get deployment to check if there are any deployments.

Run kubectl get deployment to check if there are any deployments

Image – Run kubectl get deployment to check if there are any deployments

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Now that we have cluster ready, we can use kubectl create command to create new deployment. I already have below deployment.yaml ready with the simple web app – Nginx as a container image.

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 name: webapp1
spec:
 replicas: 1
 template:
  metadata:
   labels:
    app: webapp1
  spec:
   containers:
    - name: webapp1
    image: nginxinc/nginx-unprivileged
    ports:
    - containerPort: 8080

 

KubeSail Deployments
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Image – Simple web app (nginx as container image) deployment.yaml

Use kubectl create command to create deployment

Image – Use kubectl create command to create deployment

Re-run kubectl get deployment to check if deployment has succeeded.

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Congrats! We have just deployed the first application on KubeSail by creating a deployment. Following is what the command has done for us:

  1. Searched for a suitable node where an instance of the application could be run. (currently, we have only 1 available node)
  2. Scheduled the webapp1(ngnix) application to run on that node.
  3. Configured the cluster to reschedule the instance on a new node when needed.

You can also run kubectl describe deployment to get more details of the deployment.

Run kubectl describe deployment to view more details

Image – Run kubectl describe deployment to view more details

Once the application instances are created, a Kubernetes Deployment Controller continuously monitors those instances. If the Node hosting an instance goes down or deleted, the Deployment controller replaces it.

Some of the useful kubectl commands are below.

  • kubectl get– list resources
  • kubectl describe– show detailed information about a resource
  • kubectl logs– print the logs from a container in a pod
  • kubectl exec– execute a command on a container in a pod

From the KubeSail console too, you can view the deployments and its status.

KubeSail Deployments

Image – KubeSail Deployments

Step # 3: Expose ngnix app outside of the cluster

To expose the app to the outside world, either we can create a new service or from the KubeSail Deployment page. For now, we are going to expose it from KubeSail Deployment page, click on ‘Ports’ to proceed.

Choose one of the options to get app exposed.

App exposed to outside world

Image – Hurray! App exposed to the outside world

Nginx Landing Page

Image – Nginx Landing Page

Congrats! We have just exposed our Nginx application to the outer world.

You can upgrade or downgrade your KubeSail cluster any time from your dashboard. Please check out the Pricing page for more details.

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KubeSail: Get your free Kubernetes Cluster
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KubeSail: Get your free Kubernetes Cluster
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If you're looking for free Kubernetes Cluster to play around then KubeSail is right choice,its hosted Kubernetes provider and offers free managed namespace.
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Upnxtblog
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