How to Install Minikube on Ubuntu 20.04 LTS

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In this article we are going to cover How to Install Minikube on Ubuntu 20.04 LTS AWS EC2 and deploy an app on Kubernetes cluster using Minikube.

What is Minikube in Kubernetes ?

Minikube creates a single node cluster inside a VM or Cloud Instance. It is good for beginners to learn Kubernetes since you don’t have to create a master and worker node to create a cluster and we can practice basic Kubernetes functions and can also install the Kubernetes dashboard on it.

Minikube System Requirements

  • Minimum 2 CPU’s or more    
  • Minimum 2GB of free memory    
  • Minimum 20GB of free disk space   
  •  Internet connection    
  • Container or virtual machine manager, such as: Docker, Hyperkit, Hyper-V, KVM, Parallels, Podman, VirtualBox, or VMware Fusion/Workstation

Update the system packages on Ubuntu EC2

sudo apt update

#1.Install kubectl on Ubuntu 20.04 LTS

Download kubectl binary with curl on Ubuntu using below command

curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl

Make the kubectl binary executable

chmod +x ./kubectl

Move kubectl to /usr/local/bin/kubectl directory

sudo mv ./kubectl /usr/local/bin/kubectl

To check kubectl version on Ubuntu

kubectl version

Output:

Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.4", GitCommit:"b695d79d4f967c403a96986f1750a35eb75e75f1", GitTreeState:"clean", BuildDate:"2021-11-17T15:48:33Z", GoVersion:"go1.16.10", Compiler:"gc", Platform:"linux/amd64"}

#2.Install Docker on Ubuntu 20.04 LTS

Install Docker on Ubuntu 20.04 LTS using below command

sudo apt-get install docker.io -y

To check docker service status on Ubuntu

sudo systemctl status docker

Configure to Run docker without sudo permission

sudo usermod -aG docker $USER && newgrp docker

#3.Download and Install Minikube on Ubuntu 20.04 LTS

Download and Install Minikube on Ubuntu 20.04 LTS using below commands, To download latest minikube setup refer minikube official download page

curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64

Make the minikube binary executable 

chmod +x minikube

Move minikube to /usr/local/bin/kubectl directory 

sudo mv minikube /usr/local/bin/

To check minikube version on ubuntu

minikube version

Output:

minikube version: v1.24.0
commit: 76b94fb3c4e8ac5062daf70d60cf03ddcc0a741b

Start the minikube Kubernetes cluster on Ubuntu

sudo minikube start --vm-driver=none

OR

sudo minikube start --vm-driver=none --wait=false

Error:

minikube v1.24.0 on Ubuntu 20.04 (xen/amd64)
Using the none driver based on user configuration
X Exiting due to GUEST_MISSING_CONNTRACK: Sorry, Kubernetes 1.22.3 requires conntrack to be installed in root's path

Solution:

sudo apt-get install -y conntrack

Now start the minikube on Ubuntu

minikube start --vm-driver=none

Output:

* minikube v1.24.0 on Ubuntu 20.04 (xen/amd64)
* Using the none driver based on user configuration
* Starting control plane node minikube in cluster minikube
* Running on localhost (CPUs=2, Memory=3928MB, Disk=19788MB) ...
* OS release is Ubuntu 20.04.3 LTS
* Preparing Kubernetes v1.22.3 on Docker 20.10.7 ...
  - kubelet.resolv-conf=/run/systemd/resolve/resolv.conf
    > kubectl.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubelet.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubeadm.sha256: 64 B / 64 B [--------------------------] 100.00% ? p/s 0s
    > kubectl: 44.73 MiB / 44.73 MiB [------------] 100.00% 66.30 MiB p/s 900ms
    > kubeadm: 43.71 MiB / 43.71 MiB [-------------] 100.00% 48.59 MiB p/s 1.1s
    > kubelet: 115.57 MiB / 115.57 MiB [-----------] 100.00% 69.82 MiB p/s 1.9s
  - Generating certificates and keys ...
  - Booting up control plane ...
  - Configuring RBAC rules ...
* Configuring local host environment ...
*
! The 'none' driver is designed for experts who need to integrate with an existing VM
* Most users should use the newer 'docker' driver instead, which does not require root!
* For more information, see: https://minikube.sigs.k8s.io/docs/reference/drivers/none/
*
! kubectl and minikube configuration will be stored in /home/ubuntu
! To use kubectl or minikube commands as your own user, you may need to relocate them. For example, to overwrite your own settings, run:
*
  - sudo mv /home/ubuntu/.kube /home/ubuntu/.minikube $HOME
  - sudo chown -R $USER $HOME/.kube $HOME/.minikube
*
* This can also be done automatically by setting the env var CHANGE_MINIKUBE_NONE_USER=true
* Verifying Kubernetes components...
  - Using image gcr.io/k8s-minikube/storage-provisioner:v5
* Enabled addons: storage-provisioner, default-storageclass
* Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default

To Check the status of Minikube

minikube status

Output:

minikube
type: Control Plane
host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured

To check Minikube cluster information

kubectl cluster-info

Output:

Kubernetes control plane is running at https://172.31.4.153:8443
CoreDNS is running at https://172.31.4.153:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

To view minikube cluster events

kubectl get events

To view the kubectl configuration

kubectl config view

Output:

apiVersion: v1
clusters:
- cluster:
    certificate-authority: /home/ubuntu/.minikube/ca.crt
    extensions:
    - extension:
        last-update: Thu, 25 Nov 2021 14:45:29 UTC
        provider: minikube.sigs.k8s.io
        version: v1.24.0
      name: cluster_info
    server: https://172.31.4.153:8443
  name: minikube
contexts:
- context:
    cluster: minikube
    extensions:
    - extension:
        last-update: Thu, 25 Nov 2021 14:45:29 UTC
        provider: minikube.sigs.k8s.io
        version: v1.24.0
      name: context_info
    namespace: default
    user: minikube
  name: minikube
current-context: minikube
kind: Config
preferences: {}
users:
- name: minikube
  user:
    client-certificate: /home/ubuntu/.minikube/profiles/minikube/client.crt
    client-key: /home/ubuntu/.minikube/profiles/minikube/client.key

Lets create first container on Minikube Cluster using kubectl

kubectl run hello-minikube --image=gcr.io/google_containers/echoserver:1.4 --port=8080

To check pods on minikube using kubectl command

kubectl get pods

Output:

kubectl get pods
NAME             READY   STATUS    RESTARTS   AGE
hello-minikube   1/1     Running   0          37s

We have covered Install Minikube on Ubuntu.

#4:Deploy an app on Minikube Cluster

Lets create deployment on Minikube cluster

kubectl create deployment hello-node --image=k8s.gcr.io/echoserver:1.4

To check deployment on minikube cluster

kubectl get deployment

Output:

kubectl get deployment
NAME         READY   UP-TO-DATE   AVAILABLE   AGE
hello-node   1/1     1            1           31s

Expose the deployment using service on minikube cluster

kubectl expose deployment hello-node --type=NodePort --port=8080

To check service on minikube cluster using kubectl

kubectl get svc

Output:

kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-node   NodePort    10.111.170.87   <none>        8080:32548/TCP   26s
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP          11m

Access the app on minikube cluster using cluster IP

curl -v 13.234.67.176:32548

Output:

*   Trying 13.234.67.176:32548...
* TCP_NODELAY set
* Connected to 13.234.67.176 (13.234.67.176) port 32548 (#0)
> GET / HTTP/1.1
> Host: 13.234.67.176:32548
> User-Agent: curl/7.68.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Server: nginx/1.10.0
< Date: Thu, 25 Nov 2021 14:59:53 GMT
< Content-Type: text/plain
< Transfer-Encoding: chunked
< Connection: keep-alive
<
CLIENT VALUES:
client_address=172.17.0.1
command=GET
real path=/
query=nil
request_version=1.1
request_uri=http://13.234.67.176:8080/

SERVER VALUES:
server_version=nginx: 1.10.0 - lua: 10001

HEADERS RECEIVED:
accept=*/*
host=13.234.67.176:32548
user-agent=curl/7.68.0
BODY:
* Connection #0 to host 13.234.67.176 left intact

we can access it within the cluster via $(minikube ip):$NODE_PORT

To check minikube internal IP

minikube ip
curl -v 172.31.4.153:32548

To access app on browser using node port

http://13.234.67.176:32548/

Output:

How to Install Minikube on Ubuntu 20.04 LTS 1

To delete service on minikube cluster using kubectl

kubectl delete service hello-node

To delete deployment on minikube cluster using kubectl

kubectl delete deployment hello-node

To stop minikube cluster

minikube stop

Output:

* Stopping node "minikube"  ...
* 1 node stopped.

To delete minikube cluster

minikube delete

Output:

* Uninstalling Kubernetes v1.22.3 using kubeadm ...
* Deleting "minikube" in none ...
* Removed all traces of the "minikube" cluster.

Conclusion:

In this article we have covered How to Install Minikube on Ubuntu 20.04 LTS AWS EC2 and deploy an app on Kubernetes cluster using Minikube.

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