readyNodes.sh

#!/bin/bash
set -x

JSONPATH="'{range .items[*]}
  {.metadata.name}{\"\\t\"} \
  {.status.nodeInfo.kubeletVersion}{\"\\t\"} \
  {.status.nodeInfo.osImage}{\"\\t\"} \
  {.status.nodeInfo.architecture}{\"\\t\"} \
  {.status.conditions[?(@.status==\"True\")].type}{\"\\n\"} \
{end}'"

notReady() {
  # Get the list of nodes and their statuses  
  NODES="$(kubectl get nodes -o jsonpath="$JSONPATH")"
  # Example output:
  # master-node   Ready
  # worker-node   Ready MemoryPressure
  # worker-node2  EtcVoter Ready
  # worker-node3  
  # shellcheck disable=SC2060,SC2140
  NOT_READY="$(echo "$NODES" | grep -v "Ready" | tr -d ["\t","\n"," ","'"] || true)"
  if [ -n "$NOT_READY" ]; then
    # Some nodes are not ready
    return 0
  else
    # All nodes are ready
    return 1
  fi
}

TIMEOUT=5 # 5 minutes
TIMEOUT_MINUTES=$((TIMEOUT * 60))
INTERVAL=10 # 10 seconds
MAX=$((TIMEOUT_MINUTES / INTERVAL))
ATTEMPTS=0

while notReady; do
  if [[ $ATTEMPTS -lt $MAX ]]; then
    echo "Waiting for nodes to be ready..."
    ATTEMPTS=$((ATTEMPTS + 1))
    sleep $INTERVAL;
  else
    echo "Timeout reached. Nodes are not ready..."
    kubectl get nodes || true
    kubectl get all -A
    exit 1
  fi
done

echo "Nodes are ready..."

echo "nodes..."
kubectl get nodes || true
echo "all..."
kubectl get all -A || true
echo "pods..."
kubectl get pods -A || true

exit 0