github.com/lamielle/terraform@v0.3.2-0.20141121070651-81f008ba53d5/builtin/providers/aws/resource_aws_subnet.go (about)

     1  package aws
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  	"time"
     7  
     8  	"github.com/hashicorp/terraform/helper/resource"
     9  	"github.com/hashicorp/terraform/helper/schema"
    10  	"github.com/mitchellh/goamz/ec2"
    11  )
    12  
    13  func resourceAwsSubnet() *schema.Resource {
    14  	return &schema.Resource{
    15  		Create: resourceAwsSubnetCreate,
    16  		Read:   resourceAwsSubnetRead,
    17  		Update: resourceAwsSubnetUpdate,
    18  		Delete: resourceAwsSubnetDelete,
    19  
    20  		Schema: map[string]*schema.Schema{
    21  			"vpc_id": &schema.Schema{
    22  				Type:     schema.TypeString,
    23  				Optional: true,
    24  				ForceNew: true,
    25  				Computed: true,
    26  			},
    27  
    28  			"cidr_block": &schema.Schema{
    29  				Type:     schema.TypeString,
    30  				Required: true,
    31  				ForceNew: true,
    32  			},
    33  
    34  			"availability_zone": &schema.Schema{
    35  				Type:     schema.TypeString,
    36  				Optional: true,
    37  				Computed: true,
    38  				ForceNew: true,
    39  			},
    40  
    41  			"map_public_ip_on_launch": &schema.Schema{
    42  				Type:     schema.TypeBool,
    43  				Optional: true,
    44  			},
    45  
    46  			"tags": tagsSchema(),
    47  		},
    48  	}
    49  }
    50  
    51  func resourceAwsSubnetCreate(d *schema.ResourceData, meta interface{}) error {
    52  	p := meta.(*ResourceProvider)
    53  	ec2conn := p.ec2conn
    54  
    55  	createOpts := &ec2.CreateSubnet{
    56  		AvailabilityZone: d.Get("availability_zone").(string),
    57  		CidrBlock:        d.Get("cidr_block").(string),
    58  		VpcId:            d.Get("vpc_id").(string),
    59  	}
    60  
    61  	resp, err := ec2conn.CreateSubnet(createOpts)
    62  
    63  	if err != nil {
    64  		return fmt.Errorf("Error creating subnet: %s", err)
    65  	}
    66  
    67  	// Get the ID and store it
    68  	subnet := &resp.Subnet
    69  	d.SetId(subnet.SubnetId)
    70  	log.Printf("[INFO] Subnet ID: %s", subnet.SubnetId)
    71  
    72  	// Wait for the Subnet to become available
    73  	log.Printf("[DEBUG] Waiting for subnet (%s) to become available", subnet.SubnetId)
    74  	stateConf := &resource.StateChangeConf{
    75  		Pending: []string{"pending"},
    76  		Target:  "available",
    77  		Refresh: SubnetStateRefreshFunc(ec2conn, subnet.SubnetId),
    78  		Timeout: 10 * time.Minute,
    79  	}
    80  
    81  	_, err = stateConf.WaitForState()
    82  
    83  	if err != nil {
    84  		return fmt.Errorf(
    85  			"Error waiting for subnet (%s) to become ready: %s",
    86  			d.Id(), err)
    87  	}
    88  
    89  	return resourceAwsSubnetUpdate(d, meta)
    90  }
    91  
    92  func resourceAwsSubnetRead(d *schema.ResourceData, meta interface{}) error {
    93  	p := meta.(*ResourceProvider)
    94  	ec2conn := p.ec2conn
    95  
    96  	resp, err := ec2conn.DescribeSubnets([]string{d.Id()}, ec2.NewFilter())
    97  
    98  	if err != nil {
    99  		return err
   100  	}
   101  	if resp == nil {
   102  		return nil
   103  	}
   104  
   105  	subnet := &resp.Subnets[0]
   106  
   107  	d.Set("vpc_id", subnet.VpcId)
   108  	d.Set("availability_zone", subnet.AvailabilityZone)
   109  	d.Set("cidr_block", subnet.CidrBlock)
   110  	d.Set("map_public_ip_on_launch", subnet.MapPublicIpOnLaunch)
   111  	d.Set("tags", tagsToMap(subnet.Tags))
   112  
   113  	return nil
   114  }
   115  
   116  func resourceAwsSubnetUpdate(d *schema.ResourceData, meta interface{}) error {
   117  	p := meta.(*ResourceProvider)
   118  	ec2conn := p.ec2conn
   119  
   120  	d.Partial(true)
   121  
   122  	if err := setTags(ec2conn, d); err != nil {
   123  		return err
   124  	} else {
   125  		d.SetPartial("tags")
   126  	}
   127  
   128  	if d.HasChange("map_public_ip_on_launch") {
   129  		modifyOpts := &ec2.ModifySubnetAttribute{
   130  			SubnetId:            d.Id(),
   131  			MapPublicIpOnLaunch: true,
   132  		}
   133  
   134  		log.Printf("[DEBUG] Subnet modify attributes: %#v", modifyOpts)
   135  
   136  		_, err := ec2conn.ModifySubnetAttribute(modifyOpts)
   137  
   138  		if err != nil {
   139  			return err
   140  		} else {
   141  			d.SetPartial("map_public_ip_on_launch")
   142  		}
   143  	}
   144  
   145  	d.Partial(false)
   146  
   147  	return resourceAwsSubnetRead(d, meta)
   148  }
   149  
   150  func resourceAwsSubnetDelete(d *schema.ResourceData, meta interface{}) error {
   151  	p := meta.(*ResourceProvider)
   152  	ec2conn := p.ec2conn
   153  
   154  	log.Printf("[INFO] Deleting subnet: %s", d.Id())
   155  	if _, err := ec2conn.DeleteSubnet(d.Id()); err != nil {
   156  		ec2err, ok := err.(*ec2.Error)
   157  		if ok && ec2err.Code == "InvalidSubnetID.NotFound" {
   158  			return nil
   159  		}
   160  
   161  		return fmt.Errorf("Error deleting subnet: %s", err)
   162  	}
   163  
   164  	return nil
   165  }
   166  
   167  // SubnetStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch a Subnet.
   168  func SubnetStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
   169  	return func() (interface{}, string, error) {
   170  		resp, err := conn.DescribeSubnets([]string{id}, ec2.NewFilter())
   171  		if err != nil {
   172  			if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidSubnetID.NotFound" {
   173  				resp = nil
   174  			} else {
   175  				log.Printf("Error on SubnetStateRefresh: %s", err)
   176  				return nil, "", err
   177  			}
   178  		}
   179  
   180  		if resp == nil {
   181  			// Sometimes AWS just has consistency issues and doesn't see
   182  			// our instance yet. Return an empty state.
   183  			return nil, "", nil
   184  		}
   185  
   186  		subnet := &resp.Subnets[0]
   187  		return subnet, subnet.State, nil
   188  	}
   189  }