func extractMdb(output *ec2.DescribeInstancesOutput) *mdb.Mdb {
var result mdb.Mdb
for _, reservation := range output.Reservations {
for _, instance := range reservation.Instances {
if instance.PrivateDnsName != nil {
machine := mdb.Machine{
Hostname: *instance.PrivateDnsName,
AwsMetadata: &mdb.AwsMetadata{
InstanceId: *instance.InstanceId,
},
}
if instance.PrivateIpAddress != nil {
machine.IpAddress = *instance.PrivateIpAddress
}
extractTags(instance.Tags, &machine)
result.Machines = append(result.Machines, machine)
}
}
}
return &result
}
