faasd does not provide memory limits of functions in Canonicalize format

[nitishkumar71]

All the openfaas implementation should return the memory info in the Canonicalize format.

Expected Behaviour

faasd should return memory limits in Canonicalize i.e. 5000000 should be returned as 5M. We follow the same into faas-netes.

Current Behaviour

faasd Provides function memory limit in bytes.

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List all Possible Solutions

We can follow the implementation for k8s

https://github.com/openfaas/faas-netes/blob/master/pkg/k8s/function_status.go#L38

https://github.com/openfaas/faas-netes/blob/master/vendor/k8s.io/api/core/v1/resource.go#L34

List the one solution that you would recommend

Steps to Reproduce (for bugs)

1. We can use certifier with the current release of faasd as done in the pipeline https://github.com/openfaas/certifier/runs/4542572124?check_suite_focus=true#step:5:138

[alexellis]

Could you submit a PR for initial review and testing?

Alex

[nitishkumar71]

I will work on this.

[Shikachuu]

Sorry, I think this issue is my bad 😓 I should have written a test case for the SI conversion aswell.

Anyways @nitishkumar71 this is the problematic line that you looking for:
https://github.com/openfaas/faasd/blob/master/pkg/provider/handlers/read.go#L41

There was a conversation about this on the PR aswell, you might find something useful there:
#206 (comment)

Since the memory limit itself is working, only the format breaks.

[alexellis]

So we put in: 1Mi
And get out: 1048576

For this import "k8s.io/apimachinery/pkg/api/resource"

What do these calls generate?

limitBytes:=1048576
resource.NewQuantity(limitBytes, resource.BinarySI)
resource.NewQuantity(limitBytes, resource.DecimalSI)

[nitishkumar71]

So just checked below lines in playground

	limitBytes1 := int64(1048576)
	fmt.Println(resource.NewQuantity(limitBytes1, resource.BinarySI))
	fmt.Println(resource.NewQuantity(limitBytes1, resource.DecimalSI))

	limitBytes2 := int64(5000000)
	fmt.Println(resource.NewQuantity(limitBytes2, resource.BinarySI))
	fmt.Println(resource.NewQuantity(limitBytes2, resource.DecimalSI))

and the output we received is

1Mi
1048576

5000000
5M

[alexellis]

Is that ordering correct in the output?

[nitishkumar71]

Yes.

Including playground link.

https://go.dev/play/p/r7J2X3pOT7g