github.com/minamijoyo/terraform@v0.7.8-0.20161029001309-18b3736ba44b/builtin/providers/aws/resource_aws_subnet.go (about)

     1  package aws
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  	"time"
     7  
     8  	"github.com/aws/aws-sdk-go/aws"
     9  	"github.com/aws/aws-sdk-go/aws/awserr"
    10  	"github.com/aws/aws-sdk-go/service/ec2"
    11  	"github.com/hashicorp/terraform/helper/resource"
    12  	"github.com/hashicorp/terraform/helper/schema"
    13  )
    14  
    15  func resourceAwsSubnet() *schema.Resource {
    16  	return &schema.Resource{
    17  		Create: resourceAwsSubnetCreate,
    18  		Read:   resourceAwsSubnetRead,
    19  		Update: resourceAwsSubnetUpdate,
    20  		Delete: resourceAwsSubnetDelete,
    21  		Importer: &schema.ResourceImporter{
    22  			State: schema.ImportStatePassthrough,
    23  		},
    24  
    25  		Schema: map[string]*schema.Schema{
    26  			"vpc_id": &schema.Schema{
    27  				Type:     schema.TypeString,
    28  				Required: true,
    29  				ForceNew: true,
    30  			},
    31  
    32  			"cidr_block": &schema.Schema{
    33  				Type:     schema.TypeString,
    34  				Required: true,
    35  				ForceNew: true,
    36  			},
    37  
    38  			"availability_zone": &schema.Schema{
    39  				Type:     schema.TypeString,
    40  				Optional: true,
    41  				Computed: true,
    42  				ForceNew: true,
    43  			},
    44  
    45  			"map_public_ip_on_launch": &schema.Schema{
    46  				Type:     schema.TypeBool,
    47  				Optional: true,
    48  				Default:  false,
    49  			},
    50  
    51  			"tags": tagsSchema(),
    52  		},
    53  	}
    54  }
    55  
    56  func resourceAwsSubnetCreate(d *schema.ResourceData, meta interface{}) error {
    57  	conn := meta.(*AWSClient).ec2conn
    58  
    59  	createOpts := &ec2.CreateSubnetInput{
    60  		AvailabilityZone: aws.String(d.Get("availability_zone").(string)),
    61  		CidrBlock:        aws.String(d.Get("cidr_block").(string)),
    62  		VpcId:            aws.String(d.Get("vpc_id").(string)),
    63  	}
    64  
    65  	var err error
    66  	resp, err := conn.CreateSubnet(createOpts)
    67  
    68  	if err != nil {
    69  		return fmt.Errorf("Error creating subnet: %s", err)
    70  	}
    71  
    72  	// Get the ID and store it
    73  	subnet := resp.Subnet
    74  	d.SetId(*subnet.SubnetId)
    75  	log.Printf("[INFO] Subnet ID: %s", *subnet.SubnetId)
    76  
    77  	// Wait for the Subnet to become available
    78  	log.Printf("[DEBUG] Waiting for subnet (%s) to become available", *subnet.SubnetId)
    79  	stateConf := &resource.StateChangeConf{
    80  		Pending: []string{"pending"},
    81  		Target:  []string{"available"},
    82  		Refresh: SubnetStateRefreshFunc(conn, *subnet.SubnetId),
    83  		Timeout: 10 * time.Minute,
    84  	}
    85  
    86  	_, err = stateConf.WaitForState()
    87  
    88  	if err != nil {
    89  		return fmt.Errorf(
    90  			"Error waiting for subnet (%s) to become ready: %s",
    91  			d.Id(), err)
    92  	}
    93  
    94  	return resourceAwsSubnetUpdate(d, meta)
    95  }
    96  
    97  func resourceAwsSubnetRead(d *schema.ResourceData, meta interface{}) error {
    98  	conn := meta.(*AWSClient).ec2conn
    99  
   100  	resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
   101  		SubnetIds: []*string{aws.String(d.Id())},
   102  	})
   103  
   104  	if err != nil {
   105  		if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidSubnetID.NotFound" {
   106  			// Update state to indicate the subnet no longer exists.
   107  			d.SetId("")
   108  			return nil
   109  		}
   110  		return err
   111  	}
   112  	if resp == nil {
   113  		return nil
   114  	}
   115  
   116  	subnet := resp.Subnets[0]
   117  
   118  	d.Set("vpc_id", subnet.VpcId)
   119  	d.Set("availability_zone", subnet.AvailabilityZone)
   120  	d.Set("cidr_block", subnet.CidrBlock)
   121  	d.Set("map_public_ip_on_launch", subnet.MapPublicIpOnLaunch)
   122  	d.Set("tags", tagsToMap(subnet.Tags))
   123  
   124  	return nil
   125  }
   126  
   127  func resourceAwsSubnetUpdate(d *schema.ResourceData, meta interface{}) error {
   128  	conn := meta.(*AWSClient).ec2conn
   129  
   130  	d.Partial(true)
   131  
   132  	if err := setTags(conn, d); err != nil {
   133  		return err
   134  	} else {
   135  		d.SetPartial("tags")
   136  	}
   137  
   138  	if d.HasChange("map_public_ip_on_launch") {
   139  		modifyOpts := &ec2.ModifySubnetAttributeInput{
   140  			SubnetId: aws.String(d.Id()),
   141  			MapPublicIpOnLaunch: &ec2.AttributeBooleanValue{
   142  				Value: aws.Bool(d.Get("map_public_ip_on_launch").(bool)),
   143  			},
   144  		}
   145  
   146  		log.Printf("[DEBUG] Subnet modify attributes: %#v", modifyOpts)
   147  
   148  		_, err := conn.ModifySubnetAttribute(modifyOpts)
   149  
   150  		if err != nil {
   151  			return err
   152  		} else {
   153  			d.SetPartial("map_public_ip_on_launch")
   154  		}
   155  	}
   156  
   157  	d.Partial(false)
   158  
   159  	return resourceAwsSubnetRead(d, meta)
   160  }
   161  
   162  func resourceAwsSubnetDelete(d *schema.ResourceData, meta interface{}) error {
   163  	conn := meta.(*AWSClient).ec2conn
   164  
   165  	log.Printf("[INFO] Deleting subnet: %s", d.Id())
   166  	req := &ec2.DeleteSubnetInput{
   167  		SubnetId: aws.String(d.Id()),
   168  	}
   169  
   170  	wait := resource.StateChangeConf{
   171  		Pending:    []string{"pending"},
   172  		Target:     []string{"destroyed"},
   173  		Timeout:    5 * time.Minute,
   174  		MinTimeout: 1 * time.Second,
   175  		Refresh: func() (interface{}, string, error) {
   176  			_, err := conn.DeleteSubnet(req)
   177  			if err != nil {
   178  				if apiErr, ok := err.(awserr.Error); ok {
   179  					if apiErr.Code() == "DependencyViolation" {
   180  						// There is some pending operation, so just retry
   181  						// in a bit.
   182  						return 42, "pending", nil
   183  					}
   184  
   185  					if apiErr.Code() == "InvalidSubnetID.NotFound" {
   186  						return 42, "destroyed", nil
   187  					}
   188  				}
   189  
   190  				return 42, "failure", err
   191  			}
   192  
   193  			return 42, "destroyed", nil
   194  		},
   195  	}
   196  
   197  	if _, err := wait.WaitForState(); err != nil {
   198  		return fmt.Errorf("Error deleting subnet: %s", err)
   199  	}
   200  
   201  	return nil
   202  }
   203  
   204  // SubnetStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch a Subnet.
   205  func SubnetStateRefreshFunc(conn *ec2.EC2, id string) resource.StateRefreshFunc {
   206  	return func() (interface{}, string, error) {
   207  		resp, err := conn.DescribeSubnets(&ec2.DescribeSubnetsInput{
   208  			SubnetIds: []*string{aws.String(id)},
   209  		})
   210  		if err != nil {
   211  			if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "InvalidSubnetID.NotFound" {
   212  				resp = nil
   213  			} else {
   214  				log.Printf("Error on SubnetStateRefresh: %s", err)
   215  				return nil, "", err
   216  			}
   217  		}
   218  
   219  		if resp == nil {
   220  			// Sometimes AWS just has consistency issues and doesn't see
   221  			// our instance yet. Return an empty state.
   222  			return nil, "", nil
   223  		}
   224  
   225  		subnet := resp.Subnets[0]
   226  		return subnet, *subnet.State, nil
   227  	}
   228  }