github.com/nicgrayson/terraform@v0.4.3-0.20150415203910-c4de50829380/builtin/providers/aws/resource_aws_subnet.go (about)

     1  package aws
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  	"time"
     7  
     8  	"github.com/awslabs/aws-sdk-go/aws"
     9  	"github.com/awslabs/aws-sdk-go/service/ec2"
    10  	"github.com/hashicorp/terraform/helper/resource"
    11  	"github.com/hashicorp/terraform/helper/schema"
    12  )
    13  
    14  func resourceAwsSubnet() *schema.Resource {
    15  	return &schema.Resource{
    16  		Create: resourceAwsSubnetCreate,
    17  		Read:   resourceAwsSubnetRead,
    18  		Update: resourceAwsSubnetUpdate,
    19  		Delete: resourceAwsSubnetDelete,
    20  
    21  		Schema: map[string]*schema.Schema{
    22  			"vpc_id": &schema.Schema{
    23  				Type:     schema.TypeString,
    24  				Optional: true,
    25  				ForceNew: true,
    26  				Computed: true,
    27  			},
    28  
    29  			"cidr_block": &schema.Schema{
    30  				Type:     schema.TypeString,
    31  				Required: true,
    32  				ForceNew: true,
    33  			},
    34  
    35  			"availability_zone": &schema.Schema{
    36  				Type:     schema.TypeString,
    37  				Optional: true,
    38  				Computed: true,
    39  				ForceNew: true,
    40  			},
    41  
    42  			"map_public_ip_on_launch": &schema.Schema{
    43  				Type:     schema.TypeBool,
    44  				Optional: true,
    45  				Default:  false,
    46  			},
    47  
    48  			"tags": tagsSchema(),
    49  		},
    50  	}
    51  }
    52  
    53  func resourceAwsSubnetCreate(d *schema.ResourceData, meta interface{}) error {
    54  	conn := meta.(*AWSClient).ec2SDKconn
    55  
    56  	createOpts := &ec2.CreateSubnetInput{
    57  		AvailabilityZone: aws.String(d.Get("availability_zone").(string)),
    58  		CIDRBlock:        aws.String(d.Get("cidr_block").(string)),
    59  		VPCID:            aws.String(d.Get("vpc_id").(string)),
    60  	}
    61  
    62  	resp, err := conn.CreateSubnet(createOpts)
    63  
    64  	if err != nil {
    65  		return fmt.Errorf("Error creating subnet: %s", err)
    66  	}
    67  
    68  	// Get the ID and store it
    69  	subnet := resp.Subnet
    70  	d.SetId(*subnet.SubnetID)
    71  	log.Printf("[INFO] Subnet ID: %s", *subnet.SubnetID)
    72  
    73  	// Wait for the Subnet to become available
    74  	log.Printf("[DEBUG] Waiting for subnet (%s) to become available", *subnet.SubnetID)
    75  	stateConf := &resource.StateChangeConf{
    76  		Pending: []string{"pending"},
    77  		Target:  "available",
    78  		Refresh: SubnetStateRefreshFunc(conn, *subnet.SubnetID),
    79  		Timeout: 10 * time.Minute,
    80  	}
    81  
    82  	_, err = stateConf.WaitForState()
    83  
    84  	if err != nil {
    85  		return fmt.Errorf(
    86  			"Error waiting for subnet (%s) to become ready: %s",
    87  			d.Id(), err)
    88  	}
    89  
    90  	return resourceAwsSubnetUpdate(d, meta)
    91  }
    92  
    93  func resourceAwsSubnetRead(d *schema.ResourceData, meta interface{}) error {
    94  	conn := meta.(*AWSClient).ec2SDKconn
    95  
    96  	resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
    97  		SubnetIDs: []*string{aws.String(d.Id())},
    98  	})
    99  
   100  	if err != nil {
   101  		if ec2err, ok := err.(aws.APIError); ok && ec2err.Code == "InvalidSubnetID.NotFound" {
   102  			// Update state to indicate the subnet no longer exists.
   103  			d.SetId("")
   104  			return nil
   105  		}
   106  		return err
   107  	}
   108  	if resp == nil {
   109  		return nil
   110  	}
   111  
   112  	subnet := resp.Subnets[0]
   113  
   114  	d.Set("vpc_id", subnet.VPCID)
   115  	d.Set("availability_zone", subnet.AvailabilityZone)
   116  	d.Set("cidr_block", subnet.CIDRBlock)
   117  	d.Set("map_public_ip_on_launch", subnet.MapPublicIPOnLaunch)
   118  	d.Set("tags", tagsToMapSDK(subnet.Tags))
   119  
   120  	return nil
   121  }
   122  
   123  func resourceAwsSubnetUpdate(d *schema.ResourceData, meta interface{}) error {
   124  	conn := meta.(*AWSClient).ec2SDKconn
   125  
   126  	d.Partial(true)
   127  
   128  	if err := setTagsSDK(conn, d); err != nil {
   129  		return err
   130  	} else {
   131  		d.SetPartial("tags")
   132  	}
   133  
   134  	if d.HasChange("map_public_ip_on_launch") {
   135  		modifyOpts := &ec2.ModifySubnetAttributeInput{
   136  			SubnetID: aws.String(d.Id()),
   137  			MapPublicIPOnLaunch: &ec2.AttributeBooleanValue{
   138  				Value: aws.Boolean(d.Get("map_public_ip_on_launch").(bool)),
   139  			},
   140  		}
   141  
   142  		log.Printf("[DEBUG] Subnet modify attributes: %#v", modifyOpts)
   143  
   144  		_, err := conn.ModifySubnetAttribute(modifyOpts)
   145  
   146  		if err != nil {
   147  			return err
   148  		} else {
   149  			d.SetPartial("map_public_ip_on_launch")
   150  		}
   151  	}
   152  
   153  	d.Partial(false)
   154  
   155  	return resourceAwsSubnetRead(d, meta)
   156  }
   157  
   158  func resourceAwsSubnetDelete(d *schema.ResourceData, meta interface{}) error {
   159  	conn := meta.(*AWSClient).ec2SDKconn
   160  
   161  	log.Printf("[INFO] Deleting subnet: %s", d.Id())
   162  	req := &ec2.DeleteSubnetInput{
   163  		SubnetID: aws.String(d.Id()),
   164  	}
   165  
   166  	wait := resource.StateChangeConf{
   167  		Pending:    []string{"pending"},
   168  		Target:     "destroyed",
   169  		Timeout:    5 * time.Minute,
   170  		MinTimeout: 1 * time.Second,
   171  		Refresh: func() (interface{}, string, error) {
   172  			_, err := conn.DeleteSubnet(req)
   173  			if err != nil {
   174  				if apiErr, ok := err.(aws.APIError); ok {
   175  					if apiErr.Code == "DependencyViolation" {
   176  						// There is some pending operation, so just retry
   177  						// in a bit.
   178  						return 42, "pending", nil
   179  					}
   180  
   181  					if apiErr.Code == "InvalidSubnetID.NotFound" {
   182  						return 42, "destroyed", nil
   183  					}
   184  				}
   185  
   186  				return 42, "failure", err
   187  			}
   188  
   189  			return 42, "destroyed", nil
   190  		},
   191  	}
   192  
   193  	if _, err := wait.WaitForState(); err != nil {
   194  		return fmt.Errorf("Error deleting subnet: %s", err)
   195  	}
   196  
   197  	return nil
   198  }
   199  
   200  // SubnetStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch a Subnet.
   201  func SubnetStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
   202  	return func() (interface{}, string, error) {
   203  		resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
   204  			SubnetIDs: []*string{aws.String(id)},
   205  		})
   206  		if err != nil {
   207  			if ec2err, ok := err.(aws.APIError); ok && ec2err.Code == "InvalidSubnetID.NotFound" {
   208  				resp = nil
   209  			} else {
   210  				log.Printf("Error on SubnetStateRefresh: %s", err)
   211  				return nil, "", err
   212  			}
   213  		}
   214  
   215  		if resp == nil {
   216  			// Sometimes AWS just has consistency issues and doesn't see
   217  			// our instance yet. Return an empty state.
   218  			return nil, "", nil
   219  		}
   220  
   221  		subnet := resp.Subnets[0]
   222  		return subnet, *subnet.State, nil
   223  	}
   224  }