Issue:
When you try to log into SDDC Manager – 502 bad gateway Rebooted the Appliance – it goes into “You are in emergency mode‘

Resolution:
When opening the console, this message is displayed:
Dependency failed for /dev/data_vg/vmware
Provide the root password on the console
Use # df -h to verify that there are no full filesystems and compare the output to the filesystem table (# cat /etc/fstab).
Run the below command to do a file system check
e2fsck -y /dev/data_vg/vmware
When all errors are fixed, reboot the SDDC Manager appliance
It should now be able to boot the SDDC Manager appliance