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resource_azure_virtual_network.go
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resource_azure_virtual_network.go
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package azure
import (
"fmt"
"log"
"github.com/Azure/azure-sdk-for-go/management"
"github.com/Azure/azure-sdk-for-go/management/virtualnetwork"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
const (
virtualNetworkRetrievalError = "Error retrieving Virtual Network Configuration: %s"
)
func resourceAzureVirtualNetwork() *schema.Resource {
return &schema.Resource{
Create: resourceAzureVirtualNetworkCreate,
Read: resourceAzureVirtualNetworkRead,
Update: resourceAzureVirtualNetworkUpdate,
Delete: resourceAzureVirtualNetworkDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"address_space": &schema.Schema{
Type: schema.TypeList,
Required: true,
Elem: &schema.Schema{Type: schema.TypeString},
},
"dns_servers_names": &schema.Schema{
Type: schema.TypeList,
Optional: true,
Elem: &schema.Schema{
Type: schema.TypeString,
},
},
"subnet": &schema.Schema{
Type: schema.TypeSet,
Required: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"address_prefix": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"security_group": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
},
},
Set: resourceAzureSubnetHash,
},
"location": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
},
}
}
func resourceAzureVirtualNetworkCreate(d *schema.ResourceData, meta interface{}) error {
ac := meta.(*Client)
mc := ac.mgmtClient
vnetClient := ac.vnetClient
name := d.Get("name").(string)
// Lock the client just before we get the virtual network configuration and immediately
// set an defer to unlock the client again whenever this function exits
ac.vnetMutex.Lock()
defer ac.vnetMutex.Unlock()
nc, err := vnetClient.GetVirtualNetworkConfiguration()
if err != nil {
if management.IsResourceNotFoundError(err) {
// if no network config exists yet; create a new one now:
nc = virtualnetwork.NetworkConfiguration{}
} else {
return fmt.Errorf(virtualNetworkRetrievalError, err)
}
}
for _, n := range nc.Configuration.VirtualNetworkSites {
if n.Name == name {
return fmt.Errorf("Virtual Network %s already exists!", name)
}
}
network := createVirtualNetwork(d)
nc.Configuration.VirtualNetworkSites = append(nc.Configuration.VirtualNetworkSites, network)
req, err := vnetClient.SetVirtualNetworkConfiguration(nc)
if err != nil {
return fmt.Errorf("Error creating Virtual Network %s: %s", name, err)
}
// Wait until the virtual network is created
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf("Error waiting for Virtual Network %s to be created: %s", name, err)
}
d.SetId(name)
if err := associateSecurityGroups(d, meta); err != nil {
return err
}
return resourceAzureVirtualNetworkRead(d, meta)
}
func resourceAzureVirtualNetworkRead(d *schema.ResourceData, meta interface{}) error {
ac := meta.(*Client)
vnetClient := ac.vnetClient
secGroupClient := ac.secGroupClient
nc, err := vnetClient.GetVirtualNetworkConfiguration()
if err != nil {
return fmt.Errorf(virtualNetworkRetrievalError, err)
}
for _, n := range nc.Configuration.VirtualNetworkSites {
if n.Name == d.Id() {
d.Set("address_space", n.AddressSpace.AddressPrefix)
d.Set("location", n.Location)
// Create a new set to hold all configured subnets
subnets := &schema.Set{
F: resourceAzureSubnetHash,
}
// Loop through all endpoints
for _, s := range n.Subnets {
subnet := map[string]interface{}{}
// Get the associated (if any) security group
sg, err := secGroupClient.GetNetworkSecurityGroupForSubnet(s.Name, d.Id())
if err != nil && !management.IsResourceNotFoundError(err) {
return fmt.Errorf(
"Error retrieving Network Security Group associations of subnet %s: %s", s.Name, err)
}
// Update the values
subnet["name"] = s.Name
subnet["address_prefix"] = s.AddressPrefix
subnet["security_group"] = sg.Name
subnets.Add(subnet)
}
d.Set("subnet", subnets)
return nil
}
}
log.Printf("[DEBUG] Virtual Network %s does no longer exist", d.Id())
d.SetId("")
return nil
}
func resourceAzureVirtualNetworkUpdate(d *schema.ResourceData, meta interface{}) error {
ac := meta.(*Client)
mc := ac.mgmtClient
vnetClient := ac.vnetClient
// Lock the client just before we get the virtual network configuration and immediately
// set an defer to unlock the client again whenever this function exits
ac.vnetMutex.Lock()
defer ac.vnetMutex.Unlock()
nc, err := vnetClient.GetVirtualNetworkConfiguration()
if err != nil {
return fmt.Errorf(virtualNetworkRetrievalError, err)
}
found := false
for i, n := range nc.Configuration.VirtualNetworkSites {
if n.Name == d.Id() {
network := createVirtualNetwork(d)
nc.Configuration.VirtualNetworkSites[i] = network
found = true
}
}
if !found {
return fmt.Errorf("Virtual Network %s does not exists!", d.Id())
}
req, err := vnetClient.SetVirtualNetworkConfiguration(nc)
if err != nil {
return fmt.Errorf("Error updating Virtual Network %s: %s", d.Id(), err)
}
// Wait until the virtual network is updated
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf("Error waiting for Virtual Network %s to be updated: %s", d.Id(), err)
}
if err := associateSecurityGroups(d, meta); err != nil {
return err
}
return resourceAzureVirtualNetworkRead(d, meta)
}
func resourceAzureVirtualNetworkDelete(d *schema.ResourceData, meta interface{}) error {
ac := meta.(*Client)
mc := ac.mgmtClient
vnetClient := ac.vnetClient
// Lock the client just before we get the virtual network configuration and immediately
// set an defer to unlock the client again whenever this function exits
ac.vnetMutex.Lock()
defer ac.vnetMutex.Unlock()
nc, err := vnetClient.GetVirtualNetworkConfiguration()
if err != nil {
return fmt.Errorf(virtualNetworkRetrievalError, err)
}
filtered := nc.Configuration.VirtualNetworkSites[:0]
for _, n := range nc.Configuration.VirtualNetworkSites {
if n.Name != d.Id() {
filtered = append(filtered, n)
}
}
nc.Configuration.VirtualNetworkSites = filtered
req, err := vnetClient.SetVirtualNetworkConfiguration(nc)
if err != nil {
return fmt.Errorf("Error deleting Virtual Network %s: %s", d.Id(), err)
}
// Wait until the virtual network is deleted
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf("Error waiting for Virtual Network %s to be deleted: %s", d.Id(), err)
}
d.SetId("")
return nil
}
func resourceAzureSubnetHash(v interface{}) int {
m := v.(map[string]interface{})
subnet := m["name"].(string) + m["address_prefix"].(string) + m["security_group"].(string)
return hashcode.String(subnet)
}
func createVirtualNetwork(d *schema.ResourceData) virtualnetwork.VirtualNetworkSite {
// fetch address spaces:
var prefixes []string
for _, prefix := range d.Get("address_space").([]interface{}) {
prefixes = append(prefixes, prefix.(string))
}
// fetch DNS references:
var dnsRefs []virtualnetwork.DNSServerRef
for _, dns := range d.Get("dns_servers_names").([]interface{}) {
dnsRefs = append(dnsRefs, virtualnetwork.DNSServerRef{
Name: dns.(string),
})
}
// Add all subnets that are configured
var subnets []virtualnetwork.Subnet
if rs := d.Get("subnet").(*schema.Set); rs.Len() > 0 {
for _, subnet := range rs.List() {
subnet := subnet.(map[string]interface{})
subnets = append(subnets, virtualnetwork.Subnet{
Name: subnet["name"].(string),
AddressPrefix: subnet["address_prefix"].(string),
})
}
}
return virtualnetwork.VirtualNetworkSite{
Name: d.Get("name").(string),
Location: d.Get("location").(string),
AddressSpace: virtualnetwork.AddressSpace{
AddressPrefix: prefixes,
},
DNSServersRef: dnsRefs,
Subnets: subnets,
}
}
func associateSecurityGroups(d *schema.ResourceData, meta interface{}) error {
azureClient := meta.(*Client)
mc := azureClient.mgmtClient
secGroupClient := azureClient.secGroupClient
virtualNetwork := d.Get("name").(string)
if rs := d.Get("subnet").(*schema.Set); rs.Len() > 0 {
for _, subnet := range rs.List() {
subnet := subnet.(map[string]interface{})
securityGroup := subnet["security_group"].(string)
subnetName := subnet["name"].(string)
// Get the associated (if any) security group
sg, err := secGroupClient.GetNetworkSecurityGroupForSubnet(subnetName, d.Id())
if err != nil && !management.IsResourceNotFoundError(err) {
return fmt.Errorf(
"Error retrieving Network Security Group associations of subnet %s: %s", subnetName, err)
}
// If the desired and actual security group are the same, were done so can just continue
if sg.Name == securityGroup {
continue
}
// If there is an associated security group, make sure we first remove it from the subnet
if sg.Name != "" {
req, err := secGroupClient.RemoveNetworkSecurityGroupFromSubnet(sg.Name, subnetName, virtualNetwork)
if err != nil {
return fmt.Errorf("Error removing Network Security Group %s from subnet %s: %s",
securityGroup, subnetName, err)
}
// Wait until the security group is associated
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for Network Security Group %s to be removed from subnet %s: %s",
securityGroup, subnetName, err)
}
}
// If the desired security group is not empty, assign the security group to the subnet
if securityGroup != "" {
req, err := secGroupClient.AddNetworkSecurityToSubnet(securityGroup, subnetName, virtualNetwork)
if err != nil {
return fmt.Errorf("Error associating Network Security Group %s to subnet %s: %s",
securityGroup, subnetName, err)
}
// Wait until the security group is associated
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for Network Security Group %s to be associated with subnet %s: %s",
securityGroup, subnetName, err)
}
}
}
}
return nil
}