github.com/niedbalski/juju@v0.0.0-20190215020005-8ff100488e47/provider/common/disk.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package common
     5  
     6  import (
     7  	jujuos "github.com/juju/os"
     8  	jujuseries "github.com/juju/os/series"
     9  )
    10  
    11  // MinRootDiskSizeGiB is the minimum size for the root disk of an
    12  // instance, in Gigabytes. This value accommodates the anticipated
    13  // size of the initial image, any updates, and future application
    14  // data.
    15  func MinRootDiskSizeGiB(series string) uint64 {
    16  	// See comment below that explains why we're ignoring the error
    17  	os, _ := jujuseries.GetOSFromSeries(series)
    18  	switch os {
    19  	case jujuos.Ubuntu, jujuos.CentOS, jujuos.OpenSUSE:
    20  		return 8
    21  	case jujuos.Windows:
    22  		return 40
    23  	// By default we just return a "sane" default, since the error will just
    24  	// be returned by the api and seen in juju status
    25  	default:
    26  		return 8
    27  	}
    28  }
    29  
    30  // MiBToGiB converts the provided megabytes (base-2) into the nearest
    31  // gigabytes (base-2), rounding up. This is useful for providers that
    32  // deal in gigabytes (while juju deals in megabytes).
    33  func MiBToGiB(m uint64) uint64 {
    34  	return (m + 1023) / 1024
    35  }