func()

in internal/deployers/eksapi/infra.go [399:426]

• 28 lines of code
• 4 McCabe index (conditional complexity)

func (m *InfrastructureManager) getRankedAZsForInstanceTypes(opts *deployerOptions) ([]string, error) {
	offerings, err := m.clients.EC2().DescribeInstanceTypeOfferings(context.TODO(), &ec2.DescribeInstanceTypeOfferingsInput{
		LocationType: ec2types.LocationTypeAvailabilityZone,
		Filters: []ec2types.Filter{
			{
				Name:   aws.String("instance-type"),
				Values: opts.InstanceTypes,
			},
		},
	})
	if err != nil {
		return nil, fmt.Errorf("failed to describe instance type offerings: %v", err)
	}
	counts := make(map[string]int)
	for _, offering := range offerings.InstanceTypeOfferings {
		az := aws.ToString(offering.Location)
		count := counts[az]
		counts[az] = count + 1
	}
	var azs []string
	for az := range counts {
		azs = append(azs, az)
	}
	sort.Slice(azs, func(i, j int) bool {
		return counts[azs[i]] > counts[azs[j]]
	})
	return azs, nil
}