Skip to content

Latest commit

 

History

History
608 lines (453 loc) · 13.3 KB

install-minikube.md

File metadata and controls

608 lines (453 loc) · 13.3 KB

Install Minikube Kubernetes on Ubuntu

Installation Steps

Step 1. Update Your System

apt update & sudo apt upgrade -y

Reboot the system

reboot

Step 2. Installing Docker

Use the following command to adding latest docker binary filies

apt install ca-certificates curl gnupg wget apt-transport-https -y
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt update

Install docker by running the following command.

apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Add your local user to docker group

sudo usermod -aG docker $USER
newgrp docker

Step 3. Installing Minikube

Use the following curl command to download latest minikube binary filies

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

Once the binary is downloaded, use the following command to install Minikube

install minikube-linux-amd64 /usr/local/bin/minikube

Verifying Minikube installation

minikube version

Output As Like bellow:

minikube version: v1.32.0 commit: 8220a6eb95f0a4d75f7f2d7b14cef975f050512d

Verify kubectl Version:

kubectl version --client

Step 4. Installing kubectl utility

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
chmod +x kubectl
mv kubectl /usr/local/bin/

Verify the kubectl version

kubectl version

Step 5. Starting Minikube

When you start minikube 1st time then declear your required driver its could be docker, containerd, virtualbox etc.

minikube start –driver=docker

In case Minikube cannot start because there is error regarding the Docker driver. Possible error:

minikube start --driver=docker --force

Step 6. Verifying Installation

Use the following command to verify Minikube:

minikube status

Output As like As

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

Use the following command to verify Kubernetes:

kubectl cluster-info

#Output like as:

Kubernetes control plane is running at https://192.168.49.2:8443 CoreDNS is running at https://192.168.49.2:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

Manage Minikube kubernetes

#Managing Minikube Cluster #To stop and start the minikube cluster

minikube stop

minikube start

minikube start --force

#In order to delete the minikube cluster

minikube delete

#delete the Service

kubectl delete services my-service

#Continuously watching kubernetes all services

watch kubectl get all -o wide

#List of Kubernetes Nodes:

kubectl get nodes

#Output as like as

NAME STATUS ROLES AGE VERSION minikube Ready control-plane 25h v1.28.3

#View cluster events kubectl get events

#View the kubectl configuration kubectl config view

+++++++++++++++++++++++++++++++++

  • Managing Addons on minikube + +++++++++++++++++++++++++++++++++

minikube addons list

#If you wish to enable any addons run the below minikube command,

minikube addons enable

#Enable Dashboard Addons

minikube addons enable dashboard

minikube addons enable ingress

++++++++++++++++++++++++++++++++++++

++++++++++++++++++++++++++++++++++++++++++++

  • Accessing Kubernetes Dashboard + ++++++++++++++++++++++++++++++++++++++++++++

#Installing the Kubernetes Dashboard

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml

#Start kubernetes dashboard using Minikube

minikube dashboard

#List of Namespaces

kubectl get services --all-namespaces

#Check all the resources

kubectl get all -n kubernetes-dashboard

#Accessing the Kubernetes Dashboard from Outside

#Easy Ways #Port Forwarding for kubernetes-dashboard

kubectl port-forward -n kubernetes-dashboard service/kubernetes-dashboard 10443:443 --address 0.0.0.0

#https://192.168.0.89:10443

#Another Ways

##We will have to change the type of service from ClusterIp to NodePort. So, give the following command to edit the service and make the following changes.

kubectl edit service/kubernetes-dashboard -n kubernetes-dashboard

#After: You can give the IP of your wish if 32321 is occupied #Now, check if the service was changed successfully by giving the following command:

kubectl get svc

#It will open the Kubernetes dashboard in the web browser.

#kubectl proxy --address='0.0.0.0' --disable-filter=true #kubectl proxy --address='0.0.0.0' --accept-hosts='^$' #kubectl proxy --address='0.0.0.0' --port=8001 --accept-hosts='^$'

kubectl -n kubernetes-dashboard describe service kubernetes-dashboard

+++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++

  • Kubernetes Error & Solutions + +++++++++++++++++++++++++++++++++++++

kubectl config get-contexts

#Error 01: @"kubeconfig: Misconfigured" error

Here's a summary of the commands you can try: minikube status minikube start ls -l ~/.kube/config chmod 600 ~/.kube/config minikube kubectl

#Error 02:

#Error from server (BadRequest): container "jenkins" in pod "jenkins-7c4946cc58-mcngv" is waiting to start: ContainerCreating

#Troubleshoot kubectl get events --sort-by=.metadata.creationTimestamp

++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++

  • Deploy a sample nginx deployment + +++++++++++++++++++++++++++++++++++++

kubectl create deployment nginx-web --image=nginx

kubectl expose deployment nginx-web --type NodePort --port=80

kubectl get deployment,pod,svc

+++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++++++++

  • Create Pod Nginx web server using YML + +++++++++++++++++++++++++++++++++++++++++++++++++++

nano nginx.yml

apiVersion: v1 kind: Pod metadata: name: nginx-pod spec: containers:

  • name: nginx image: nginx:latest ports:
    • containerPort: 80

kubectl apply -f nginx.yml

+++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++

  • Kubectl Port-Forwarding Syntax + +++++++++++++++++++++++++++++++++++++

#Port-Forward Syntax

kubectl port-forward POD_NAME LOCAL_PORT:REMOTE_POD_PORT

#Command Description POD_NAME: Give our pod name. LOCAL_PORT: Give a port which we access from the internet. REMOTE_POD_PORT: Give our pods default port.

#Example: kubectl port-forward nginx-pod 8085:80 --address 0.0.0.0

#Kubectl port-forward in background

kubectl port-forward nginx-pod 8085:80 &

kubectl port-forward nginx-pod 8085:80 --address 0.0.0.0 &

#Port-Forwarding a local port to a pod with address binding: #kubectl port-forward --address

: Example command:

kubectl port-forward --address 192.168.0.100 my-pod 8080:80

Forwarding a local port to a service with address binding:

#kubectl port-forward --address

service/ : Example command:

kubectl port-forward --address 192.168.0.100 service/my-service 8080:80

#Listen on a random port locally, forwarding to 80 in the pod

kubectl port-forward pod/nginx :80

#Check port-forwarding services

ps -ef | grep port-forward

#Analyze Network Connections

netstat -antp

+++++++++++++++++++++++++++++++++++++++

++++++++++++++++++++++++++++++++++++++++++++

  • Kubectl Basic Operation in Kubernetes + ++++++++++++++++++++++++++++++++++++++++++++

#Run a Pod kubectl run nginx -–image nginx

#Port-forwarding the pod kubectl port-forward nginx 8080:80

#View the Pod Logs kubectl logs nginx

#View the Pod Logs Continuously kubectl logs -f pod-name

#Run a Pod with Shell Exection
kubectl run myshell -it –image busybox –sh

#Run a Pod with Shell Exection and auto delete pods kubectl run myshell —rm –it –image busybox –sh

#Create a Deployment kubectl create deployment nginx --image nginx:latest --replicas 3

#List of Deployments kubectl get deployment

#Scale a Deployment kubectl scale deployment nginx --replicas 5

#Delete Deployment kubectl delete deploy myshell

#Create a pod using local docker images using image-policy kubectl run myportfolio --image=myportfolio:latest --image-pull-policy=Never --restart=Never

#Delete Pods kubectl delete pod myportfolio

#Delete all Pods kubectl delete pods –all

#Delete pods & services using label name kubectl delete pods,services -l name=label-name

#View Description kubectl describe pod nginx

#Expose a Service kubectl expose deployment nginx –type NodePort –port 80

#View Service Description kubectl describe svc ngnix

#List of pods widely kubectl get pods -o wide

#Execute command from outside to the inside pods kubectl exec pod-name date

#Execute command from outside to the inside pods kubectl exec pod-name -c container-name date

#Execute pods kubectl exec -it pod-name /bin/bash

#Create a Namespace kubectl create namespace devops-tool-suite

+++++++++++++++++++++++++++++++++++++++++++++ Kubernetes Persistent Volumes using HostPath +++++++++++++++++++++++++++++++++++++++++++++

#Check your cluster’s storage classes

kubectl get storageclass

#Create a Persistent Volume

apiVersion: v1 kind: PersistentVolume metadata: name: nginxpv spec: accessModes: - ReadWriteOnce capacity: storage: 1Gi storageClassName: standard hostPath: path: /nfsstorage/nginxdata

#Create a Persistent Volume Claim

apiVersion: v1 kind: PersistentVolumeClaim metadata: name: nginxpvc spec: accessModes: - ReadWriteOnce resources: requests: storage: 1Gi storageClassName: standard volumeName: nginxpv

#Attach PVCs to Pods

apiVersion: v1 kind: Pod metadata: name: nginx spec: containers: - name: nginx image: nginx:latest volumeMounts: name: data - mountPath: /usr/share/nginx/html volumes: - name: data persistentVolumeClaim: claimName: nginxpvc

+++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++ Kubernetes Persistent Volumes using NFS +++++++++++++++++++++++++++++++++++++++++++++

apiVersion: v1 kind: PersistentVolume metadata: name: mynfspv spec: capacity: storage: 2Gi accessModes: - ReadWriteOnce nfs: server: 192.168.0.89 path: /nfsstorage/jenkins_home persistentVolumeReclaimPolicy: Retain

apiVersion: v1 kind: PersistentVolumeClaim metadata: name: mynfspvc spec: accessModes: - ReadWriteOnce resources: requests: storage: 2Gi

#Attach PVCs to Pods

apiVersion: v1 kind: Pod metadata: name: nginx spec: containers: - name: nginx image: nginx:latest volumeMounts: name: data - mountPath: /usr/share/nginx/html volumes: - name: data persistentVolumeClaim: claimName: mynfspvc

+++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++ Jenkins Deployment in Kubernetes +++++++++++++++++++++++++++++++++++++++++++++

apiVersion: apps/v1 kind: Deployment metadata: name: myjenkins spec: replicas: 1 selector: matchLabels: app: myjenkins template: metadata: labels: app: myjenkins spec: containers: - name: myjenkins image: jenkins/jenkins:lts ports: - name: http-port containerPort: 8080 - name: jnlp-port containerPort: 50000 #command: ["sh", "-c", "chown -R 777:777 /var/jenkins_home"] #command: ["sh", "-c", "chown root:root /var/jenkins_home"] volumeMounts: - name: jenkins-home mountPath: /var/jenkins_home volumes: - name: jenkins-home persistentVolumeClaim: claimName: pvcnfs

+++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++ Manage Kubernetes Storage +++++++++++++++++++++++++++++++++++++++++++++

kubectl get sc

kubectl get pv

kubectl get pvc

kubectl describe sc sc-name

kubectl describe pv pv-name

kubectl describe pvc pvc-name

kubectl delete sc sc-name

kubectl delete pvc pvc-name

kubectl delete pv pv-name

+++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++ Run Nginx Pod using NFS Data Persistent +++++++++++++++++++++++++++++++++++++++++++++

apiVersion: v1 kind: Pod metadata: name: web1 spec: containers:

  • name: nginx image: nginx:latest ports:
    • containerPort: 80 volumeMounts:
      • mountPath: /usr/share/nginx/html name: nginxstorage volumes:
    • name: nginxstorage nfs: server: 192.168.0.89 path: /nfsstorage

+++++++++++++++++++++++++++++++++++++++++++++

Create yml file using image-pull-policy=Never

apiVersion: v1 kind: Pod metadata: name: web1 spec: containers:

  • name: myportfolio image: myportfolio:latest imagePullPolicy: Never ports:
    • containerPort: 80 volumeMounts:
      • mountPath: /usr/share/nginx/html name: nginxstorage volumes:
    • name: nginxstorage nfs: server: 192.168.0.89 path: /nfsstorage/myportfolio

+++++++++++++++++++++++++++++++++++++++++++++