How to check internet connection from Greenplum Cluster

Here is a simple function to check the connectivity between greenplum cluster and external IP.

function check_connection() 
{
curl google.com 2>&1 | grep -i "curl.*resolve host" > /dev/null 2>&1
if [[ $? == 0 ]]; then
   echo "disconnected"
else
   echo "connected"
fi
}

function check_ext_connection() 
{
ping -c 1 google.com > /dev/null 2>&1
if [[ $? == 0 ]]; then
   CONNECTION=true
fi
return
}

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