Go API: Resources.DiskMB does not populate when using event.Allocation()

[albertollamaso]

Nomad version

1.2.12

Operating system and Environment details

Nomad running in Debian VM, go api client running on Ubuntu

Issue

The DiskMB value comes as nil when running event.Allocation()

Reproduction steps

with Nomad go api, listen to event stream

alloc, err := event.Allocation()
if err == nil {
	fmt.Println(alloc.Resources.DiskMB) // Sees as <nil>
        
        e := event.Payload["Allocation"]
        fmt.Println(e.(map[string]interface{})["Resources"].(map[string]interface{})["DiskMB"]) // Sees the value
}

Seems an issue with the mapstructure or pointer (mostly)

nomad/api/resources.go

Line 14 in 499fceb

DiskMB *int `mapstructure:"disk" hcl:"disk,optional"`

``

Expected Result

Value would be the same and not coming as nil when using event.Allocation()

Actual Result

Value is always coming as nil

Job file (if appropriate)

Nomad Server logs (if appropriate)

Nomad Client logs (if appropriate)

[lgfa29]

Thanks for the report @albertollamaso 🙂

I think that may be the same problem as #11044 that @pkazmierczak has been investigating. We don't have any estimate for a fix, but if #12916 works we may be able to apply a similar change to this struct as well.