Useful Kubernetes IDE - Lens

tags: Kubernetes

Foreword

Lens is an open source IDE. It is a tool to manage Kubernetes. It’s can let we see our object of kubernetes on Lens.

Installation Guide

Step1 Download Lens

We can download Lens on its official site. If we downloaded the Lens we can see the Lens like this figure.

Step2 Add Kubernetes Cluster

If we press the “add icon” on left side, we can see this page.

Then we need to add the config to Lens. Let Lens connect to the kubernetes cluster.

Now we use cat /etc/kubernetes/admin.cfg to copy the admin.cfg to Lens from master node.

And press "Add Cluster". We will see our cluster show on the Lens.

Lens Setting

After that we can go to the setting and install the Metrics on our Lens. It will help us to monitor our nodes.

We will see the Namespaces "lens-mertics", Pod ,and Deployment etc.

We can see our status of nodes on Lens.

Create object

We can use Lens to create object, without using kubectl apply -f xxx.yml. First we need to write the yaml file.

apiVersion: v1
kind: Namespace
metadata:
  name: demo
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo
  namespace: demo
  labels:
    app: demo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: demo
  template:
    metadata:
      labels:
        app: demo
    spec:
      containers:
      - name: demo
        image: nginx
        ports:
        - containerPort: 80

Press "Create resource".

Press "Create".

We can see the Pod and Deployment.

Execute And Log

In the past, we need to use kubectl exec -it xxxx -- bash to execute to the container. Now, wecan just press the "pod shell" buttom to execute the container.

After we can execute to the container.

If we need to see the Log we can press the buttom next to Pod shell to see the Pod's Log.

Scale Up

If we want to scale up the Pod, we need to use kubectl scale -n demo --current-replicas=1 --replicas=10 deployment.apps/demo to scale up. Now we can press the "scale" buttom to scale up.

We can just slide it to scale up our Pod.

And it will sucess.

Summary

There are many useful tools on Lens such like Configmap, Secret, and PVC etc. Maybe you can try it by yourself.

Reference

https://k8slens.dev/

https://medium.com/@tasslin/簡單實用的kubernetes-ide-lens-d8bba1fc06ad