// findInstanceSpec returns the InstanceSpec that best satisfies the supplied
// InstanceConstraint.
//
// NOTE(axw) for now we ignore simplestreams altogether, and go straight to
// Azure's image registry.
func findInstanceSpec(
client compute.VirtualMachineImagesClient,
instanceTypesMap map[string]instances.InstanceType,
constraint *instances.InstanceConstraint,
imageStream string,
) (*instances.InstanceSpec, error) {
if !constraintHasArch(constraint, arch.AMD64) {
// Azure only supports AMD64.
return nil, errors.NotFoundf("%s in arch constraints", arch.AMD64)
}
image, err := imageutils.SeriesImage(constraint.Series, imageStream, constraint.Region, client)
if err != nil {
return nil, errors.Trace(err)
}
images := []instances.Image{*image}
instanceTypes := make([]instances.InstanceType, 0, len(instanceTypesMap))
for _, instanceType := range instanceTypesMap {
instanceTypes = append(instanceTypes, instanceType)
}
constraint.Constraints = defaultToBaselineSpec(constraint.Constraints)
return instances.FindInstanceSpec(images, constraint, instanceTypes)
}
// findInstanceSpec returns the InstanceSpec that best satisfies the supplied
// InstanceConstraint.
func findInstanceSpec(env *azureEnviron, constraint *instances.InstanceConstraint) (*instances.InstanceSpec, error) {
constraint.Constraints = defaultToBaselineSpec(constraint.Constraints)
imageData, err := findMatchingImages(env, constraint.Region, constraint.Series, constraint.Arches)
if err != nil {
return nil, err
}
images := instances.ImageMetadataToImages(imageData)
instanceTypes, err := listInstanceTypes(env)
if err != nil {
return nil, err
}
return instances.FindInstanceSpec(images, constraint, instanceTypes)
}