// getAutoScalingName tries to get autoscaling name from system, first gets from
// config var, if not set then tries ec2dynamicdata service
func getAutoScalingName(conf *Config, session *awssession.Session) (string, error) {
if conf.AutoScalingName != "" {
return conf.AutoScalingName, nil
}
info, err := ec2dynamicdata.Get()
if err != nil {
return "", fmt.Errorf("couldn't get info. Err: %s", err.Error())
}
instanceID := info.InstanceID
asg := autoscaling.New(session)
resp, err := asg.DescribeAutoScalingInstances(
&autoscaling.DescribeAutoScalingInstancesInput{
InstanceIds: []*string{
aws.String(instanceID),
},
},
)
if err != nil {
return "", err
}
for _, instance := range resp.AutoScalingInstances {
if *instance.InstanceId == instanceID {
return *instance.AutoScalingGroupName, nil
}
}
return "", errors.New("couldn't find autoscaling name")
}
// getRegion checks if region name is given in config, if not tries to get it
// from ec2dynamicdata endpoint
func getRegion(conf *Config) (string, error) {
if conf.Region != "" {
return conf.Region, nil
}
info, err := ec2dynamicdata.Get()
if err != nil {
return "", fmt.Errorf("couldn't get region. Err: %s", err.Error())
}
if info.Region == "" {
return "", fmt.Errorf("malformed ec2dynamicdata response: %#v", info)
}
return info.Region, nil
}