wait_for_instance.sh

#
# Wait for AWS instance to be ready for SSM commands
#
instance_id=$1

echo "waiting for instance $instance_id..."
pingStatus=$(aws ssm describe-instance-information \
  --instance-information-filter-list key=InstanceIds,valueSet=$instance_id \
  --query 'InstanceInformationList[].PingStatus' \
  --output text)

while [[ $pingStatus != 'Online' ]]
do
  sleep 120
  echo "waiting for instance $instance_id..."
  pingStatus=$(aws ssm describe-instance-information \
    --instance-information-filter-list key=InstanceIds,valueSet=$instance_id \
    --query 'InstanceInformationList[].PingStatus' \
    --output text)
done