func (m *AwsVpcBackend) detectRouteTableID(instanceID string, ec2c *ec2.EC2) error {
resp, err := ec2c.Instances([]string{instanceID}, nil)
if err != nil {
return fmt.Errorf("error getting instance info: %v", err)
}
if len(resp.Reservations) == 0 {
return fmt.Errorf("no reservations found")
}
if len(resp.Reservations[0].Instances) == 0 {
return fmt.Errorf("no matching instance found with id: %v", instanceID)
}
subnetID := resp.Reservations[0].Instances[0].SubnetId
vpcID := resp.Reservations[0].Instances[0].VpcId
log.Info("Subnet-ID: ", subnetID)
log.Info("VPC-ID: ", vpcID)
filter := ec2.NewFilter()
filter.Add("association.subnet-id", subnetID)
res, err := ec2c.DescribeRouteTables(nil, filter)
if err != nil {
return fmt.Errorf("error describing routeTables for subnetID %s: %v", subnetID, err)
}
if len(res.RouteTables) != 0 {
m.cfg.RouteTableID = res.RouteTables[0].RouteTableId
return nil
}
filter = ec2.NewFilter()
filter.Add("association.main", "true")
filter.Add("vpc-id", vpcID)
res, err = ec2c.DescribeRouteTables(nil, filter)
if err != nil {
log.Info("error describing route tables: ", err)
}
if len(res.RouteTables) == 0 {
return fmt.Errorf("main route table not found")
}
m.cfg.RouteTableID = res.RouteTables[0].RouteTableId
return nil
}
func (m *AwsVpcBackend) DetectRouteTableID(instanceID string, ec2c *ec2.EC2) (string, error) {
resp, err := ec2c.Instances([]string{instanceID}, nil)
if err != nil {
return "", fmt.Errorf("error getting instance info: %v", err)
}
subnetID := resp.Reservations[0].Instances[0].SubnetId
log.Info("SubnetId: ", subnetID)
filter := ec2.NewFilter()
filter.Add("association.subnet-id", subnetID)
res, err := ec2c.DescribeRouteTables(nil, filter)
if err != nil {
return "", fmt.Errorf("error describing routeTables for subnetID %s: %v", subnetID, err)
}
return res.RouteTables[0].RouteTableId, nil
}