List the pod disk usage for each pod in kubernetes

pods_disk_usage.sh

#!/bin/bash

# Check if kubectl is configured to connect to AKS cluster
if ! command -v kubectl &> /dev/null
then
    echo "kubectl could not be found. Please install kubectl and configure it to access your AKS cluster."
    exit 1
fi

# Get the list of all pods in the cluster
echo "Getting pod list..."
PODS=$(kubectl get pods --all-namespaces --field-selector=status.phase=Running -o custom-columns="NAMESPACE:.metadata.namespace,POD:.metadata.name")

if [[ -z "$PODS" ]]; then
  echo "No pods found in the cluster."
  exit 1
fi

# Print the header for the output
echo "NAMESPACE,POD,DISK_USAGE"

# Loop through each pod
while read -r line
do
    # Extract namespace and pod name
    NAMESPACE=$(echo $line | awk '{print $1}')
    POD=$(echo $line | awk '{print $2}')

    # Skip the header line
    if [[ "$POD" == "POD" ]]; then
        continue
    fi

    DISK_USAGE=$(kubectl exec -n $NAMESPACE $POD -- du -sh / 2>/dev/null | awk '{print $1}')

    if [[ -z "$DISK_USAGE" ]]; then
        DISK_USAGE="N/A"  # If disk usage can't be retrieved
    fi

    # Print the result
    echo "$NAMESPACE,$POD,$DISK_USAGE"
done <<< "$PODS"

echo "Disk usage check complete."