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resource_arm_subnet.go
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resource_arm_subnet.go
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package azurerm
import (
"fmt"
"log"
"net/http"
"github.com/Azure/azure-sdk-for-go/arm/network"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"time"
)
var subnetResourceName = "azurerm_subnet"
func resourceArmSubnet() *schema.Resource {
return &schema.Resource{
Create: resourceArmSubnetCreate,
Read: resourceArmSubnetRead,
Update: resourceArmSubnetCreate,
Delete: resourceArmSubnetDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
"name": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"resource_group_name": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"virtual_network_name": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"address_prefix": {
Type: schema.TypeString,
Required: true,
},
"network_security_group_id": {
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"route_table_id": {
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"ip_configurations": {
Type: schema.TypeSet,
Optional: true,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
},
}
}
func resourceArmSubnetCreate(d *schema.ResourceData, meta interface{}) error {
client := meta.(*ArmClient)
subnetClient := client.subnetClient
log.Printf("[INFO] preparing arguments for Azure ARM Subnet creation.")
name := d.Get("name").(string)
vnetName := d.Get("virtual_network_name").(string)
resGroup := d.Get("resource_group_name").(string)
addressPrefix := d.Get("address_prefix").(string)
azureRMLockByName(vnetName, virtualNetworkResourceName)
defer azureRMUnlockByName(vnetName, virtualNetworkResourceName)
properties := network.SubnetPropertiesFormat{
AddressPrefix: &addressPrefix,
}
if v, ok := d.GetOk("network_security_group_id"); ok {
nsgId := v.(string)
properties.NetworkSecurityGroup = &network.SecurityGroup{
ID: &nsgId,
}
networkSecurityGroupName, err := parseNetworkSecurityGroupName(nsgId)
if err != nil {
return err
}
azureRMLockByName(networkSecurityGroupName, networkSecurityGroupResourceName)
defer azureRMUnlockByName(networkSecurityGroupName, networkSecurityGroupResourceName)
}
if v, ok := d.GetOk("route_table_id"); ok {
rtId := v.(string)
properties.RouteTable = &network.RouteTable{
ID: &rtId,
}
routeTableName, err := parseRouteTableName(rtId)
if err != nil {
return err
}
azureRMLockByName(routeTableName, routeTableResourceName)
defer azureRMUnlockByName(routeTableName, routeTableResourceName)
}
subnet := network.Subnet{
Name: &name,
SubnetPropertiesFormat: &properties,
}
_, error := subnetClient.CreateOrUpdate(resGroup, vnetName, name, subnet, make(chan struct{}))
err := <-error
if err != nil {
return err
}
read, err := subnetClient.Get(resGroup, vnetName, name, "")
if err != nil {
return err
}
if read.ID == nil {
return fmt.Errorf("Cannot read Subnet %s/%s (resource group %s) ID", vnetName, name, resGroup)
}
d.SetId(*read.ID)
return resourceArmSubnetRead(d, meta)
}
func resourceArmSubnetRead(d *schema.ResourceData, meta interface{}) error {
subnetClient := meta.(*ArmClient).subnetClient
id, err := parseAzureResourceID(d.Id())
if err != nil {
return err
}
resGroup := id.ResourceGroup
vnetName := id.Path["virtualNetworks"]
name := id.Path["subnets"]
resp, err := subnetClient.Get(resGroup, vnetName, name, "")
if err != nil {
if resp.StatusCode == http.StatusNotFound {
d.SetId("")
return nil
}
return fmt.Errorf("Error making Read request on Azure Subnet %s: %s", name, err)
}
d.Set("name", name)
d.Set("resource_group_name", resGroup)
d.Set("virtual_network_name", vnetName)
d.Set("address_prefix", resp.SubnetPropertiesFormat.AddressPrefix)
if resp.SubnetPropertiesFormat.NetworkSecurityGroup != nil {
d.Set("network_security_group_id", resp.SubnetPropertiesFormat.NetworkSecurityGroup.ID)
} else {
d.Set("network_security_group_id", "")
}
if resp.SubnetPropertiesFormat.RouteTable != nil {
d.Set("route_table_id", resp.SubnetPropertiesFormat.RouteTable.ID)
} else {
d.Set("route_table_id", "")
}
if resp.SubnetPropertiesFormat.IPConfigurations != nil {
ips := make([]string, 0, len(*resp.SubnetPropertiesFormat.IPConfigurations))
for _, ip := range *resp.SubnetPropertiesFormat.IPConfigurations {
ips = append(ips, *ip.ID)
}
if err := d.Set("ip_configurations", ips); err != nil {
return err
}
} else {
d.Set("ip_configurations", []string{})
}
return nil
}
func resourceArmSubnetDelete(d *schema.ResourceData, meta interface{}) error {
subnetClient := meta.(*ArmClient).subnetClient
id, err := parseAzureResourceID(d.Id())
if err != nil {
return err
}
resGroup := id.ResourceGroup
name := id.Path["subnets"]
vnetName := id.Path["virtualNetworks"]
if v, ok := d.GetOk("network_security_group_id"); ok {
networkSecurityGroupId := v.(string)
networkSecurityGroupName, err := parseNetworkSecurityGroupName(networkSecurityGroupId)
if err != nil {
return err
}
azureRMLockByName(networkSecurityGroupName, networkSecurityGroupResourceName)
defer azureRMUnlockByName(networkSecurityGroupName, networkSecurityGroupResourceName)
}
if v, ok := d.GetOk("route_table_id"); ok {
rtId := v.(string)
routeTableName, err := parseRouteTableName(rtId)
if err != nil {
return err
}
azureRMLockByName(routeTableName, routeTableResourceName)
defer azureRMUnlockByName(routeTableName, routeTableResourceName)
}
azureRMLockByName(vnetName, virtualNetworkResourceName)
defer azureRMUnlockByName(vnetName, virtualNetworkResourceName)
azureRMLockByName(name, subnetResourceName)
defer azureRMUnlockByName(name, subnetResourceName)
_, error := subnetClient.Delete(resGroup, vnetName, name, make(chan struct{}))
err = <-error
// After deleting a gateway subnet, we check if the subnet has been deleted and
// retry if necessary. This is necessary as a workaround for scenarios in which
// a gateway subnet is deleted immediately after its previously associated
// virtual network gateway has been deleted. Unfortunately, the Azure Management
// API does not provide information on the state, therefore we try for a
// limited period of time.
if err != nil && name == "GatewaySubnet" {
err = resourceArmSubnetRetryDeleteGatewaySubnet(subnetClient, name, vnetName, resGroup)
}
return err
}
func resourceArmSubnetRetryDeleteGatewaySubnet(subnetClient network.SubnetsClient, name string, vnetName string, resGroup string) error {
stateConf := &resource.StateChangeConf{
Pending: []string{"Deleting", "Failed"},
Target: []string{"NotFound"},
Refresh: func() (interface{}, string, error) {
resp, err := subnetClient.Get(resGroup, vnetName, name, "")
if err != nil {
if resp.StatusCode == http.StatusNotFound {
return resp, "NotFound", nil
}
return nil, "", fmt.Errorf("Error issuing read request when retrying to delete Gateway Subnet %s/%s (resource group %s): %s", vnetName, name, resGroup, err)
}
// Retry deletion of gateway subnet if provisioning state is failed
if *resp.SubnetPropertiesFormat.ProvisioningState == "Failed" {
log.Printf("[DEBUG] Retry deleting Gateway Subnet %s/%s after failed provisioning state.", vnetName, name)
subnetClient.Delete(resGroup, vnetName, name, make(chan struct{}))
}
return resp, *resp.SubnetPropertiesFormat.ProvisioningState, nil
},
PollInterval: 30 * time.Second,
Timeout: 15 * time.Minute,
}
if _, err := stateConf.WaitForState(); err != nil {
return fmt.Errorf("Error waiting for Gateway Subnet %s/%s to be removed: %s", vnetName, name, err)
}
return nil
}