func (m *AwsVpcBackend) checkMatchingRoutes(instanceID, subnet string, ec2c *ec2.EC2) (bool, error) {
	matchingRouteFound := false

	filter := newFilter()
	filter.Add("route.destination-cidr-block", subnet)
	filter.Add("route.state", "active")

	input := ec2.DescribeRouteTablesInput{Filters: filter, RouteTableIds: []*string{&m.cfg.RouteTableID}}

	resp, err := ec2c.DescribeRouteTables(&input)
	if err != nil {
		return matchingRouteFound, err
	}

	for _, routeTable := range resp.RouteTables {
		for _, route := range routeTable.Routes {
			if subnet == *route.DestinationCidrBlock && *route.State == "active" {

				if *route.InstanceId == instanceID {
					matchingRouteFound = true
					break
				}

				log.Errorf("Deleting invalid *active* matching route: %s, %s \n", *route.DestinationCidrBlock, *route.InstanceId)
			}
		}
	}

	return matchingRouteFound, nil
}
Beispiel #2
0
func (be *AwsVpcBackend) detectRouteTableID(instanceID string, ec2c *ec2.EC2) (string, error) {
	instancesInput := &ec2.DescribeInstancesInput{
		InstanceIds: []*string{&instanceID},
	}

	resp, err := ec2c.DescribeInstances(instancesInput)
	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 := newFilter()
	filter.Add("association.subnet-id", *subnetID)

	routeTablesInput := &ec2.DescribeRouteTablesInput{
		Filters: filter,
	}

	res, err := ec2c.DescribeRouteTables(routeTablesInput)
	if err != nil {
		return "", fmt.Errorf("error describing routeTables for subnetID %s: %v", *subnetID, err)
	}

	if len(res.RouteTables) != 0 {
		return *res.RouteTables[0].RouteTableId, nil
	}

	filter = newFilter()
	filter.Add("association.main", "true")
	filter.Add("vpc-id", *vpcID)

	routeTablesInput = &ec2.DescribeRouteTablesInput{
		Filters: filter,
	}

	res, err = ec2c.DescribeRouteTables(routeTablesInput)
	if err != nil {
		log.Info("error describing route tables: ", err)
	}

	if len(res.RouteTables) == 0 {
		return "", fmt.Errorf("main route table not found")
	}

	return *res.RouteTables[0].RouteTableId, nil
}