Updating my ESXi server to ESXi-6.7.0-20200804001-standard (Build 16713306) resulted in the following error:
[Errno 28] No space left on device
vibs = VMware_locker_tools-light_22.214.171.12403738-16701467
Please refer to the log file for more details.
Unfortunately swap was already enabled to I had to manually install the tools-light with this command:
esxcli software vib install -v https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/esx/vmw/vib20/tools-light/VMware_locker_tools-light_126.96.36.19903738-16701467.vib
Then re-ran the upgrade and it was successful.