Add probing for service port connectivity.

  export KUBE_NAMESPACE="${context_namespace:-"default"}"

fi

function probe_server_connection_health {

  echo "Attempting server connection test - watch specific errors for possible problems with DNS, network routing, firewalls, network availability, SSL and service port availability."

  timeout 3 bash -c "cat < /dev/null > /dev/tcp/$1/$2"

  if [ "$?" -ne 0 ]; then 

    echo "ERROR: Connection to $1 on port $2 failed"; 

    echo "Any errors that preceeded this one should give clues as to what might be having problems.

  else

    echo "Connection to $1 on port $2 succeeded - the problem likely has to do with the application level or perhaps additional things this service is attempting to do on your behalf.

  fi

}

function use_kube_context() {

  if [[ -z "$KUBE_CONTEXT" ]]; then

    echo "KUBE_CONTEXT not defined. The default context (if present) will be used"