forked from openshift/installer
/
zones.go
48 lines (43 loc) · 1.2 KB
/
zones.go
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package aws
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
)
// AvailabilityZones retrieves a list of availability zones for the given region.
func AvailabilityZones(region string) ([]string, error) {
ec2Client := ec2Client(region)
zones, err := fetchAvailabilityZones(ec2Client, region)
if err != nil {
return nil, fmt.Errorf("cannot fetch availability zones: %v", err)
}
return zones, nil
}
func ec2Client(region string) *ec2.EC2 {
ssn := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
Config: aws.Config{
Region: aws.String(region),
},
}))
return ec2.New(ssn)
}
func fetchAvailabilityZones(client *ec2.EC2, region string) ([]string, error) {
zoneFilter := &ec2.Filter{
Name: aws.String("region-name"),
Values: []*string{aws.String(region)},
}
req := &ec2.DescribeAvailabilityZonesInput{
Filters: []*ec2.Filter{zoneFilter},
}
resp, err := client.DescribeAvailabilityZones(req)
if err != nil {
return nil, err
}
zones := []string{}
for _, zone := range resp.AvailabilityZones {
zones = append(zones, *zone.ZoneName)
}
return zones, nil
}