[RHEL 7] Backing File system for Docker

Issue

• Unsupported file system configuration for Docker in RHEL
• Starting docker crashes the system
• System crashes when underlying backing file system is not XFS for the Docker environment

crash> bt 
PID: 1530   TASK: ffff880036531fa0  CPU: 1   COMMAND: "dockerd"
 #0 [ffff8800b492b978] machine_kexec at ffffffff8105c4cb
 #1 [ffff8800b492b9d8] __crash_kexec at ffffffff81104a32
 #2 [ffff8800b492baa8] crash_kexec at ffffffff81104b20
 #3 [ffff8800b492bac0] oops_end at ffffffff816ad2b8
 #4 [ffff8800b492bae8] no_context at ffffffff8169d2ba
 #5 [ffff8800b492bb38] __bad_area_nosemaphore at ffffffff8169d350
 #6 [ffff8800b492bb80] bad_area_nosemaphore at ffffffff8169d4ba
 #7 [ffff8800b492bb90] __do_page_fault at ffffffff816b017e
 #8 [ffff8800b492bbf0] do_page_fault at ffffffff816b0325
 #9 [ffff8800b492bc20] page_fault at ffffffff816ac548
    [exception RIP: unknown or invalid address]
    RIP: ffff8802023ce7c0  RSP: ffff8800b492bcd8  RFLAGS: 00010246
    RAX: ffff8801d854bb40  RBX: ffff8800b8e14700  RCX: ffff8802023ce7c0
    RDX: 0000000000008040  RSI: 0000000000000000  RDI: ffff8801d854c480
    RBP: ffff8800b492bce0   R8: 0000000000000000   R9: 0000000000000000
    R10: ffff8801d854c480  R11: ffffea00076152c0  R12: ffff8800b492be50
    R13: ffff8800b492bdf0  R14: 0000000000000000  R15: ffff8800b492be50
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff8800b492bcd8] d_real at ffffffff816a12fe
#11 [ffff8800b492bce8] vfs_open at ffffffff811fe885
#12 [ffff8800b492bd10] do_last at ffffffff8120f89d
#13 [ffff8800b492bdb0] path_openat at ffffffff81210a32
#14 [ffff8800b492be48] do_filp_open at ffffffff81212fcb
#15 [ffff8800b492bf18] do_sys_open at ffffffff811ffc13
#16 [ffff8800b492bf70] sys_openat at ffffffff811ffd44
#17 [ffff8800b492bf80] system_call_fastpath at ffffffff816b5009
    RIP: 00000000006ba79a  RSP: 000000c420e3e178  RFLAGS: 00010283
    RAX: 0000000000000101  RBX: ffffffff816b5009  RCX: 0000000000000000
    RDX: 0000000000080040  RSI: 000000c42044d880  RDI: ffffffffffffff9c
    RBP: 000000c420e3e300   R8: 0000000000000000   R9: 0000000000000000
    R10: 00000000000001ed  R11: 0000000000000202  R12: ffffffff811ffd44
    R13: ffff8800b492bf78  R14: 0000000000000001  R15: 0000000000000032
    ORIG_RAX: 0000000000000101  CS: 0033  SS: 002b
crash>