Fixing missing coredumps error in ESXi

If you use iSCSI storage for your ESXi hosts- including boot from SAN, you will need to create dump files for your ESXi hosts. If you don’t- you’ll get a nice little warning in vSphere like this:

no coredump target has been configured. host core dumps cannot be saved.

First- create an empty dump file:

esxcli system coredump file add -d *your_datastore_name* -f *the_dumpfile_name(I use the ESXi hostname)*

Next- set the newly created sump file as your active dumpfile:

esxcli system coredump file set -p /vmfs/volumes/*your_datastore_name*/vmkdump/*the_dumpfile_name*.dumpfile

Finally- confirm your dumpfile is in place.:

esxcli system coredump file list

You will get an event showing that the coredump is set up and your warning will clear:

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