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resource_cloudstack_port_forward.go
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resource_cloudstack_port_forward.go
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package cloudstack
import (
"fmt"
"sync"
"time"
"strconv"
"strings"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/terraform/helper/schema"
"github.com/xanzy/go-cloudstack/cloudstack"
)
func resourceCloudStackPortForward() *schema.Resource {
return &schema.Resource{
Create: resourceCloudStackPortForwardCreate,
Read: resourceCloudStackPortForwardRead,
Update: resourceCloudStackPortForwardUpdate,
Delete: resourceCloudStackPortForwardDelete,
Schema: map[string]*schema.Schema{
"ipaddress": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"managed": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"forward": &schema.Schema{
Type: schema.TypeSet,
Required: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"protocol": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"private_port": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"public_port": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"virtual_machine": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"uuid": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
},
},
},
},
}
}
func resourceCloudStackPortForwardCreate(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Retrieve the ipaddress ID
ipaddressid, e := retrieveID(cs, "ipaddress", d.Get("ipaddress").(string))
if e != nil {
return e.Error()
}
// We need to set this upfront in order to be able to save a partial state
d.SetId(ipaddressid)
// Create all forwards that are configured
if nrs := d.Get("forward").(*schema.Set); nrs.Len() > 0 {
// Create an empty schema.Set to hold all forwards
forwards := resourceCloudStackPortForward().Schema["forward"].ZeroValue().(*schema.Set)
err := createPortForwards(d, meta, forwards, nrs)
// We need to update this first to preserve the correct state
d.Set("forward", forwards)
if err != nil {
return err
}
}
return resourceCloudStackPortForwardRead(d, meta)
}
func createPortForwards(
d *schema.ResourceData,
meta interface{},
forwards *schema.Set,
nrs *schema.Set) error {
var errs *multierror.Error
var wg sync.WaitGroup
wg.Add(nrs.Len())
sem := make(chan struct{}, 10)
for _, forward := range nrs.List() {
// Put in a tiny sleep here to avoid DoS'ing the API
time.Sleep(500 * time.Millisecond)
go func(forward map[string]interface{}) {
defer wg.Done()
sem <- struct{}{}
// Create a single forward
err := createPortForward(d, meta, forward)
// If we have a UUID, we need to save the forward
if forward["uuid"].(string) != "" {
forwards.Add(forward)
}
if err != nil {
errs = multierror.Append(errs, err)
}
<-sem
}(forward.(map[string]interface{}))
}
wg.Wait()
return errs.ErrorOrNil()
}
func createPortForward(
d *schema.ResourceData,
meta interface{},
forward map[string]interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Make sure all required parameters are there
if err := verifyPortForwardParams(d, forward); err != nil {
return err
}
// Retrieve the virtual_machine ID
virtualmachineid, e := retrieveID(cs, "virtual_machine", forward["virtual_machine"].(string))
if e != nil {
return e.Error()
}
vm, _, err := cs.VirtualMachine.GetVirtualMachineByID(virtualmachineid)
if err != nil {
return err
}
// Create a new parameter struct
p := cs.Firewall.NewCreatePortForwardingRuleParams(d.Id(), forward["private_port"].(int),
forward["protocol"].(string), forward["public_port"].(int), vm.Id)
// Set the network ID of the default network, needed when public IP address
// is not associated with any Guest network yet (VPC case)
p.SetNetworkid(vm.Nic[0].Networkid)
// Do not open the firewall automatically in any case
p.SetOpenfirewall(false)
r, err := cs.Firewall.CreatePortForwardingRule(p)
if err != nil {
return err
}
forward["uuid"] = r.Id
return nil
}
func resourceCloudStackPortForwardRead(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Get all the forwards from the running environment
p := cs.Firewall.NewListPortForwardingRulesParams()
p.SetIpaddressid(d.Id())
p.SetListall(true)
l, err := cs.Firewall.ListPortForwardingRules(p)
if err != nil {
return err
}
// Make a map of all the forwards so we can easily find a forward
forwardMap := make(map[string]*cloudstack.PortForwardingRule, l.Count)
for _, f := range l.PortForwardingRules {
forwardMap[f.Id] = f
}
// Create an empty schema.Set to hold all forwards
forwards := resourceCloudStackPortForward().Schema["forward"].ZeroValue().(*schema.Set)
// Read all forwards that are configured
if rs := d.Get("forward").(*schema.Set); rs.Len() > 0 {
for _, forward := range rs.List() {
forward := forward.(map[string]interface{})
id, ok := forward["uuid"]
if !ok || id.(string) == "" {
continue
}
// Get the forward
f, ok := forwardMap[id.(string)]
if !ok {
forward["uuid"] = ""
continue
}
// Delete the known rule so only unknown rules remain in the ruleMap
delete(forwardMap, id.(string))
privPort, err := strconv.Atoi(f.Privateport)
if err != nil {
return err
}
pubPort, err := strconv.Atoi(f.Publicport)
if err != nil {
return err
}
// Update the values
forward["protocol"] = f.Protocol
forward["private_port"] = privPort
forward["public_port"] = pubPort
if isID(forward["virtual_machine"].(string)) {
forward["virtual_machine"] = f.Virtualmachineid
} else {
forward["virtual_machine"] = f.Virtualmachinename
}
forwards.Add(forward)
}
}
// If this is a managed resource, add all unknown forwards to dummy forwards
managed := d.Get("managed").(bool)
if managed && len(forwardMap) > 0 {
for uuid := range forwardMap {
// Make a dummy forward to hold the unknown UUID
forward := map[string]interface{}{
"protocol": uuid,
"private_port": 0,
"public_port": 0,
"virtual_machine": uuid,
"uuid": uuid,
}
// Add the dummy forward to the forwards set
forwards.Add(forward)
}
}
if forwards.Len() > 0 {
d.Set("forward", forwards)
} else if !managed {
d.SetId("")
}
return nil
}
func resourceCloudStackPortForwardUpdate(d *schema.ResourceData, meta interface{}) error {
// Check if the forward set as a whole has changed
if d.HasChange("forward") {
o, n := d.GetChange("forward")
ors := o.(*schema.Set).Difference(n.(*schema.Set))
nrs := n.(*schema.Set).Difference(o.(*schema.Set))
// We need to start with a rule set containing all the rules we
// already have and want to keep. Any rules that are not deleted
// correctly and any newly created rules, will be added to this
// set to make sure we end up in a consistent state
forwards := o.(*schema.Set).Intersection(n.(*schema.Set))
// First loop through all the new forwards and create (before destroy) them
if nrs.Len() > 0 {
err := createPortForwards(d, meta, forwards, nrs)
// We need to update this first to preserve the correct state
d.Set("forward", forwards)
if err != nil {
return err
}
}
// Then loop through all the old forwards and delete them
if ors.Len() > 0 {
err := deletePortForwards(d, meta, forwards, ors)
// We need to update this first to preserve the correct state
d.Set("forward", forwards)
if err != nil {
return err
}
}
}
return resourceCloudStackPortForwardRead(d, meta)
}
func resourceCloudStackPortForwardDelete(d *schema.ResourceData, meta interface{}) error {
// Create an empty rule set to hold all rules that where
// not deleted correctly
forwards := resourceCloudStackPortForward().Schema["forward"].ZeroValue().(*schema.Set)
// Delete all forwards
if ors := d.Get("forward").(*schema.Set); ors.Len() > 0 {
err := deletePortForwards(d, meta, forwards, ors)
// We need to update this first to preserve the correct state
d.Set("forward", forwards)
if err != nil {
return err
}
}
return nil
}
func deletePortForwards(
d *schema.ResourceData,
meta interface{},
forwards *schema.Set,
ors *schema.Set) error {
var errs *multierror.Error
var wg sync.WaitGroup
wg.Add(ors.Len())
sem := make(chan struct{}, 10)
for _, forward := range ors.List() {
// Put a sleep here to avoid DoS'ing the API
time.Sleep(500 * time.Millisecond)
go func(forward map[string]interface{}) {
defer wg.Done()
sem <- struct{}{}
// Delete a single forward
err := deletePortForward(d, meta, forward)
// If we have a UUID, we need to save the forward
if forward["uuid"].(string) != "" {
forwards.Add(forward)
}
if err != nil {
errs = multierror.Append(errs, err)
}
<-sem
}(forward.(map[string]interface{}))
}
wg.Wait()
return errs.ErrorOrNil()
}
func deletePortForward(
d *schema.ResourceData,
meta interface{},
forward map[string]interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Create the parameter struct
p := cs.Firewall.NewDeletePortForwardingRuleParams(forward["uuid"].(string))
// Delete the forward
if _, err := cs.Firewall.DeletePortForwardingRule(p); err != nil {
// This is a very poor way to be told the ID does no longer exist :(
if !strings.Contains(err.Error(), fmt.Sprintf(
"Invalid parameter id value=%s due to incorrect long value format, "+
"or entity does not exist", forward["uuid"].(string))) {
return err
}
}
// Empty the UUID of this rule
forward["uuid"] = ""
return nil
}
func verifyPortForwardParams(d *schema.ResourceData, forward map[string]interface{}) error {
protocol := forward["protocol"].(string)
if protocol != "tcp" && protocol != "udp" {
return fmt.Errorf(
"%s is not a valid protocol. Valid options are 'tcp' and 'udp'", protocol)
}
return nil
}