Azure AKS Cluster Access with Multiple Clusters¶

Step-01: Introduction¶

• Azure AKS Cluster Access
• Create Clusters using Command Line
• Understand kube config file $HOME/.kube/config
• Understand kubectl config command
• kubectl config view
• kubectl config current-context
• kubectl config use-context

Azure Kubernetes Service with Azure DevOps and Terraform¶

Step-02: Create AKSDEMO3 cluster using AKS CLI¶

• Generates SSH Keys with option --generate-ssh-keys
• They will be stored in $HOME/.ssh folder in your local desktop
• Backup them if required

  # Create AKSDEMO3 Cluster
  az group create --location centralus --name aks-rg3
  az aks create --name aksdemo3 \
                --resource-group aks-rg3 \
                --node-count 1 \
                --enable-managed-identity \
                --generate-ssh-keys
  
  # Backup SSH Keys
  cd $HOME/.ssh
  mkdir BACKUP-SSH-KEYS-AKSDEMO-Clusters
  cp id_rsa* BACKUP-SSH-KEYS-AKSDEMO-Clusters
  ls -lrt BACKUP-SSH-KEYS-AKSDEMO-Clusters
  

Step-03: Create AKSDEMO4 cluster using AKS CLI¶

• Use same SSH keys for AKSDEMO4 cluster using --ssh-key-value

  # Create AKSDEMO4 Cluster
  az group create --location centralus --name aks-rg4
  az aks create --name aksdemo4 \
                --resource-group aks-rg4 \
                --node-count 1 \
                --enable-managed-identity \
                --ssh-key-value /Users/kalyanreddy/.ssh/id_rsa.pub              
  

Step-04: Configure AKSDEMO3 Cluster Access for kubectl¶

• Understand commands
• kubectl config view
• kubectl config current-context

  # View kubeconfig
  kubectl config view
  
  # Clean existing kube configs
  cd $HOME/.kube
  >config
  cat config
  
  # View kubeconfig
  kubectl config view
  
  # Configure AKSDEMO3 & 4 Cluster Access for kubectl
  az aks get-credentials --resource-group aks-rg3 --name aksdemo3
  
  # View kubeconfig
  kubectl config view
  
  # View Cluster Information
  kubectl cluster-info
  
  # View the current context for kubectl
  kubectl config current-context
  

Step-05: Configure AKSDEMO4 Cluster Access for kubectl¶

# Configure AKSDEMO4 Cluster Access for kubectl
az aks get-credentials --resource-group aks-rg4 --name aksdemo4

# View the current context for kubectl
kubectl config current-context

# View Cluster Information
kubectl cluster-info

# View kubeconfig
kubectl config view

Step-06: Switch Contexts between clusters¶

• Understand the kubectl config command use-context

  # View the current context for kubectl
  kubectl config current-context
  
  # View kubeconfig
  kubectl config view 
  Get contexts.context.name to which you want to switch 
  
  # Switch Context
  kubectl config use-context aksdemo3
  
  # View the current context for kubectl
  kubectl config current-context
  
  # View Cluster Information
  kubectl cluster-info
  

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