One of our ESXi 6.0 hosts was reporting back to vcenter and was accepting connections from the fat client, however connections to the host directly via https were being immediately redirected back to the log in page with "Failed to load host summary" error in all browsers.
[root@esxi:/var/log] df -h
Filesystem Size Used Available Use% Mounted on
NFS 5.2T 2.7T 2.5T 52% /vmfs/volumes/nfs
VMFS-5 3.5T 1.3T 2.2T 38% /vmfs/volumes/ds
vfat 285.8M 205.6M 80.3M 72% /vmfs/volumes/5cc70836-eecb7702-d4b7-20677cd872b8
vfat 249.7M 205.6M 44.1M 82% /vmfs/volumes/94a5dae7-ce13fd61-32f5-239e1c8e6234
vfat 249.7M 4.0K 249.7M 0% /vmfs/volumes/1ddca3e4-be359492-f0b6-a8dbffd34bb7
after we attempting to restart hostd and vpxa we are seeing "503 Service Unavailable" instead of the log in page via HTTPS, esxi is no longer showing up as connected to vcenter, but we can still SSH to the host.
[root@esxi:/var/log] esxcli vm process list
Connect to localhost failed: Connection failure.
[root@esxi:~] /etc/init.d/hostd restart
watchdog-hostd: Terminating watchdog process with PID 34438 hostd stopped. Ramdisk 'hostd' with estimated size of 747MB already exists hostd started.
[root@esxi:~] /etc/init.d/vpxa restart
watchdog-vpxa: Terminating watchdog process with PID 35047 vpxa stopped.
vdf shows that I am out of space in the tmp directory
Ramdisk 1k-blocks Used Available Use% Mounted on
root 32768 240 32528 0% --
etc 28672 232 28440 0% --
opt 32768 396 32372 1% --
var 49152 972 48180 1% --
tmp 262144 262144 0 100% --
iofilters 32768 0 32768 0% --
hostdstats 764928 4720 760208 0% --
also hostd.log indicates a problem with the space as well
2020-05-16T11:43:52.603Z info hostd[FFF9EB70] [Originator@6876 sub=Vimsvc.ha-eventmgr]
Event 1 : The ramdisk 'tmp' is full. As a result, the file /tmp/.SwapInfoHLS.lock.LOCK.9565543 could not be written.
2020-05-16T11:43:52.604Z panic hostd[FFC90B20] [Originator@6876 sub=Default] backtrace:
Any help is appreciated
for anyone having this issue on the HP server with a custom HP esxi image, the workaround is posted here
if anyone finds a solution please let us know.