After upgrading cluster from 4.12 to 4.14 , ignition version also update to 3.4.0 which caused issue in machine scale up    

    4.14.30

    AWS IPI based cluster which is older than 1.5 years , upgrade it from 4.12 to 4.14 and new machines will get stuck in provisioned state

    1. AWS IPI bases cluster which should be present since version 4.6
    2. Upgrade such cluster from 4.12.z to 4.14.z
    3. After upgrade , try to scale up machines based on machinesets, new machines will be stuck in provisioned state and nodes will never join the cluster because of ignition version 3.4.0
    

After cluster upgrade , machine are not scaling up until we change ignition version from 3.4.0 to 3.2.0    

    After cluster upgrade , machine should get scale up normally