package aws import ( "fmt" "log" "time" "github.com/hashicorp/terraform/helper/diff" "github.com/hashicorp/terraform/helper/resource" "github.com/hashicorp/terraform/terraform" "github.com/mitchellh/goamz/ec2" ) func resource_aws_subnet_create( s *terraform.ResourceState, d *terraform.ResourceDiff, meta interface{}) (*terraform.ResourceState, error) { p := meta.(*ResourceProvider) ec2conn := p.ec2conn // Merge the diff so that we have all the proper attributes s = s.MergeDiff(d) // Create the Subnet createOpts := &ec2.CreateSubnet{ AvailabilityZone: s.Attributes["availability_zone"], CidrBlock: s.Attributes["cidr_block"], VpcId: s.Attributes["vpc_id"], } log.Printf("[DEBUG] Subnet create config: %#v", createOpts) resp, err := ec2conn.CreateSubnet(createOpts) if err != nil { return nil, fmt.Errorf("Error creating subnet: %s", err) } // Get the ID and store it subnet := &resp.Subnet s.ID = subnet.SubnetId log.Printf("[INFO] Subnet ID: %s", s.ID) // Wait for the Subnet to become available log.Printf( "[DEBUG] Waiting for subnet (%s) to become available", s.ID) stateConf := &resource.StateChangeConf{ Pending: []string{"pending"}, Target: "available", Refresh: SubnetStateRefreshFunc(ec2conn, s.ID), Timeout: 10 * time.Minute, } subnetRaw, err := stateConf.WaitForState() if err != nil { return s, fmt.Errorf( "Error waiting for subnet (%s) to become available: %s", s.ID, err) } // Update our attributes and return return resource_aws_subnet_update_state(s, subnetRaw.(*ec2.Subnet)) } func resource_aws_subnet_update( s *terraform.ResourceState, d *terraform.ResourceDiff, meta interface{}) (*terraform.ResourceState, error) { // This should never be called because we have no update-able // attributes panic("Update for subnet is not supported") } func resource_aws_subnet_destroy( s *terraform.ResourceState, meta interface{}) error { p := meta.(*ResourceProvider) ec2conn := p.ec2conn log.Printf("[INFO] Deleting Subnet: %s", s.ID) if _, err := ec2conn.DeleteSubnet(s.ID); err != nil { ec2err, ok := err.(*ec2.Error) if ok && ec2err.Code == "InvalidSubnetID.NotFound" { return nil } return fmt.Errorf("Error deleting subnet: %s", err) } // Wait for the Subnet to actually delete log.Printf("[DEBUG] Waiting for subnet (%s) to delete", s.ID) stateConf := &resource.StateChangeConf{ Pending: []string{"available", "pending"}, Target: "", Refresh: SubnetStateRefreshFunc(ec2conn, s.ID), Timeout: 10 * time.Minute, } if _, err := stateConf.WaitForState(); err != nil { return fmt.Errorf( "Error waiting for subnet (%s) to destroy: %s", s.ID, err) } return nil } func resource_aws_subnet_refresh( s *terraform.ResourceState, meta interface{}) (*terraform.ResourceState, error) { p := meta.(*ResourceProvider) ec2conn := p.ec2conn subnetRaw, _, err := SubnetStateRefreshFunc(ec2conn, s.ID)() if err != nil { return s, err } if subnetRaw == nil { return nil, nil } subnet := subnetRaw.(*ec2.Subnet) return resource_aws_subnet_update_state(s, subnet) } func resource_aws_subnet_diff( s *terraform.ResourceState, c *terraform.ResourceConfig, meta interface{}) (*terraform.ResourceDiff, error) { b := &diff.ResourceBuilder{ Attrs: map[string]diff.AttrType{ "availability_zone": diff.AttrTypeCreate, "cidr_block": diff.AttrTypeCreate, "vpc_id": diff.AttrTypeCreate, }, ComputedAttrs: []string{ "availability_zone", }, } return b.Diff(s, c) } func resource_aws_subnet_update_state( s *terraform.ResourceState, subnet *ec2.Subnet) (*terraform.ResourceState, error) { s.Attributes["availability_zone"] = subnet.AvailabilityZone s.Attributes["cidr_block"] = subnet.CidrBlock s.Attributes["vpc_id"] = subnet.VpcId // We belong to a VPC s.Dependencies = []terraform.ResourceDependency{ terraform.ResourceDependency{ID: subnet.VpcId}, } return s, nil } // SubnetStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch // a Subnet. func SubnetStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc { return func() (interface{}, string, error) { resp, err := conn.DescribeSubnets([]string{id}, ec2.NewFilter()) if err != nil { if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidSubnetID.NotFound" { resp = nil } else { log.Printf("Error on SubnetStateRefresh: %s", err) return nil, "", err } } if resp == nil { // Sometimes AWS just has consistency issues and doesn't see // our instance yet. Return an empty state. return nil, "", nil } subnet := &resp.Subnets[0] return subnet, subnet.State, nil } }