Document URL: 

Section Number and Name: 

Describe the issue: 
Missing requirement to use xfs file system. I failed on:

CHECK [memory_availability : localhost] ******************************************************************************************************************************************************
fatal: [localhost]: FAILED! => {
    "changed": true, 
    "checks": {
        "disk_availability": {}, 
        "docker_image_availability": {
            "changed": true
        }, 
        "docker_storage": {
            "failed": true, 
            "failures": [
                [
                    "OpenShiftCheckException", 
                    "Docker storage drivers 'overlay' and 'overlay2' are only supported with\n'xfs' as the backing storage, but this host's storage is type 'extfs'."
                ]
            ], 
            "msg": "Docker storage drivers 'overlay' and 'overlay2' are only supported with\n'xfs' as the backing storage, but this host's storage is type 'extfs'."
        }, 


Suggestions for improvement: 

Additional information: