Kubernetes and Minikube

Minikube

• Overview: Minikube creates a virtual machine (VM) running Linux to simulate a Kubernetes cluster (not a real cluster).

• Installation:

  1. Download Minikube:

     curl -L0 <https://github.com/kubernetes/minikube/releases/latest/download/minikube-linux-amd64>
     
     

  2. Install Minikube:

     sudo install minikube-linux-amd64 /usr/local/bin/minikube && rm minikube-linux-amd64
     
     

  3. Add alias for kubectl in ~/.bashrc:

     vim ~/.bashrc
     alias kubectl="minikube kubectl --"
     source ~/.bashrc
     
     

• Manage Minikube:

  • Start the cluster:

    minikube start
    
    

  • Check cluster status:

    minikube status
    
    

  • Stop the cluster (does not delete it):

    minikube stop
    
    

  • Delete the cluster (removes the VM; requires reinstallation with minikube start):

    minikube delete
    
    

  • Access the VM shell:

    minikube ssh
    
    

  • Get cluster information:

    minikube kubectl -- cluster-info
    kubectl cluster-info
    
    

  • Expose a service outside the cluster:

    minikube service <service name>
    
    

Generic Commands

• List objects:

  kubectl get <object>
  
  

• Describe an object:

  kubectl describe <object> <object name>
  
  

• Delete an object:

  kubectl delete <object> <object name>
  
  

Node (Machine)

• List nodes:

  kubectl get nodes
  kubectl get node
  
  

• Describe a node:

  kubectl describe node <node name>
  
  

Namespace

• List namespaces:

  kubectl get namespaces
  kubectl get namespace
  kubectl get ns
  
  

• Create a namespace:

  kubectl create namespace myns
  
  

• Delete a namespace (deletes all members within it):

  kubectl delete namespace myns
  
  

Pod

• List pods in the default namespace:

  kubectl get pods
  kubectl get pod
  
  

• List pods with detailed information:

  kubectl get pods -o wide