feat: calculate civo db costs

[ShubhamPalriwala]

Problem

Closes #603

Solution

monthlyCost := float64((resourceInGB / 20) * (20 + (resource.Nodes-1)*15))

Changes Made

• providers/civo/storage/databases.go

How to Test

Try any configuration mentioned in the table in Civo pricing and it should validate. https://www.civo.com/pricing

Screenshots

Tested through ChatGPT :)))

Notes

Have made the assumption that:

• the resource.Size will always be added in GigaBytes
• the resource.Nodes are the total nodes and not just the additional nodes (meaning there will always be 1 node)

Checklist

• Code follows the contributing guidelines
• Changes have been thoroughly tested
• Documentation has been updated, if necessary
• Any dependencies have been added to the project, if necessary

Reviewers

@jakepage91
@mlabouardy

PS: do not know who to tag here :/ let me know who to for the future

[eneskaya]

Hey @ShubhamPalriwala, I didn't quite get your formula tbh. From our understanding the pricing goes like this:

pricing = (memory size/2)*10 + (cpu cores/2)*20 + (storage size/20)*10 + (number of nodes)*15

Could you explain your approach?

[ShubhamPalriwala]

So how I understood it,

• The cost for a 20GB of an instance with a single node is 20$.
• Each additional node adds an extra 15$

Now the storage the user chooses (whatever multiple of 20), multiply that to the base value(20) and to the additional nodes(15 per extra)

The amount of RAM/memory stays constant ie 1/10th of the storage space. The same happens for the CPUs as well.

Hence we only need either of Storage and number of nodes to compute the cost

[ShubhamPalriwala]

For reference:

[mlabouardy]

So how I understood it,

• The cost for a 20GB of an instance with a single node is 20$.
• Each additional node adds an extra 15$

Now the storage the user chooses (whatever multiple of 20), multiply that to the base value(20) and to the additional nodes(15 per extra)

The amount of RAM/memory stays constant ie 1/10th of the storage space. The same happens for the CPUs as well.

Hence we only need either of Storage and number of nodes to compute the cost

if we took this setup as an example: 40Gb NVME with 2 nodes, by following your formula, the pricing should be 70$/month while in the table its 100$/month

[ShubhamPalriwala]

Yeah, it should be 70 only in my opinion as out of 2 nodes (1 is additonal).

The 100 in the table is for 2 additional nodes making it 3 nodes in total.

Let me know if I got wrong at understanding somewhere.