terraform/builtin/providers/cloudstack/resource_cloudstack_firewal...

548 lines
13 KiB
Go

package cloudstack
import (
"fmt"
"strconv"
"strings"
"sync"
"time"
"github.com/hashicorp/go-multierror"
"github.com/hashicorp/terraform/helper/schema"
"github.com/xanzy/go-cloudstack/cloudstack"
)
func resourceCloudStackFirewall() *schema.Resource {
return &schema.Resource{
Create: resourceCloudStackFirewallCreate,
Read: resourceCloudStackFirewallRead,
Update: resourceCloudStackFirewallUpdate,
Delete: resourceCloudStackFirewallDelete,
Schema: map[string]*schema.Schema{
"ip_address_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"managed": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"rule": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"cidr_list": &schema.Schema{
Type: schema.TypeSet,
Required: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"protocol": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"icmp_type": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Computed: true,
},
"icmp_code": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Computed: true,
},
"ports": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: schema.HashString,
},
"uuids": &schema.Schema{
Type: schema.TypeMap,
Computed: true,
},
},
},
},
"parallelism": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Default: 2,
},
},
}
}
func resourceCloudStackFirewallCreate(d *schema.ResourceData, meta interface{}) error {
// Make sure all required parameters are there
if err := verifyFirewallParams(d); err != nil {
return err
}
// We need to set this upfront in order to be able to save a partial state
d.SetId(d.Get("ip_address_id").(string))
// Create all rules that are configured
if nrs := d.Get("rule").(*schema.Set); nrs.Len() > 0 {
// Create an empty schema.Set to hold all rules
rules := resourceCloudStackFirewall().Schema["rule"].ZeroValue().(*schema.Set)
err := createFirewallRules(d, meta, rules, nrs)
// We need to update this first to preserve the correct state
d.Set("rule", rules)
if err != nil {
return err
}
}
return resourceCloudStackFirewallRead(d, meta)
}
func createFirewallRules(d *schema.ResourceData, meta interface{}, rules *schema.Set, nrs *schema.Set) error {
var errs *multierror.Error
var wg sync.WaitGroup
wg.Add(nrs.Len())
sem := make(chan struct{}, d.Get("parallelism").(int))
for _, rule := range nrs.List() {
// Put in a tiny sleep here to avoid DoS'ing the API
time.Sleep(500 * time.Millisecond)
go func(rule map[string]interface{}) {
defer wg.Done()
sem <- struct{}{}
// Create a single rule
err := createFirewallRule(d, meta, rule)
// If we have at least one UUID, we need to save the rule
if len(rule["uuids"].(map[string]interface{})) > 0 {
rules.Add(rule)
}
if err != nil {
errs = multierror.Append(errs, err)
}
<-sem
}(rule.(map[string]interface{}))
}
wg.Wait()
return errs.ErrorOrNil()
}
func createFirewallRule(d *schema.ResourceData, meta interface{}, rule map[string]interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
uuids := rule["uuids"].(map[string]interface{})
// Make sure all required rule parameters are there
if err := verifyFirewallRuleParams(d, rule); err != nil {
return err
}
// Create a new parameter struct
p := cs.Firewall.NewCreateFirewallRuleParams(d.Id(), rule["protocol"].(string))
// Set the CIDR list
var cidrList []string
for _, cidr := range rule["cidr_list"].(*schema.Set).List() {
cidrList = append(cidrList, cidr.(string))
}
p.SetCidrlist(cidrList)
// If the protocol is ICMP set the needed ICMP parameters
if rule["protocol"].(string) == "icmp" {
p.SetIcmptype(rule["icmp_type"].(int))
p.SetIcmpcode(rule["icmp_code"].(int))
r, err := cs.Firewall.CreateFirewallRule(p)
if err != nil {
return err
}
uuids["icmp"] = r.Id
rule["uuids"] = uuids
}
// If protocol is not ICMP, loop through all ports
if rule["protocol"].(string) != "icmp" {
if ps := rule["ports"].(*schema.Set); ps.Len() > 0 {
// Create an empty schema.Set to hold all processed ports
ports := &schema.Set{F: schema.HashString}
for _, port := range ps.List() {
if _, ok := uuids[port.(string)]; ok {
ports.Add(port)
rule["ports"] = ports
continue
}
m := splitPorts.FindStringSubmatch(port.(string))
startPort, err := strconv.Atoi(m[1])
if err != nil {
return err
}
endPort := startPort
if m[2] != "" {
endPort, err = strconv.Atoi(m[2])
if err != nil {
return err
}
}
p.SetStartport(startPort)
p.SetEndport(endPort)
r, err := cs.Firewall.CreateFirewallRule(p)
if err != nil {
return err
}
ports.Add(port)
rule["ports"] = ports
uuids[port.(string)] = r.Id
rule["uuids"] = uuids
}
}
}
return nil
}
func resourceCloudStackFirewallRead(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Get all the rules from the running environment
p := cs.Firewall.NewListFirewallRulesParams()
p.SetIpaddressid(d.Id())
p.SetListall(true)
l, err := cs.Firewall.ListFirewallRules(p)
if err != nil {
return err
}
// Make a map of all the rules so we can easily find a rule
ruleMap := make(map[string]*cloudstack.FirewallRule, l.Count)
for _, r := range l.FirewallRules {
ruleMap[r.Id] = r
}
// Create an empty schema.Set to hold all rules
rules := resourceCloudStackFirewall().Schema["rule"].ZeroValue().(*schema.Set)
// Read all rules that are configured
if rs := d.Get("rule").(*schema.Set); rs.Len() > 0 {
for _, rule := range rs.List() {
rule := rule.(map[string]interface{})
uuids := rule["uuids"].(map[string]interface{})
if rule["protocol"].(string) == "icmp" {
id, ok := uuids["icmp"]
if !ok {
continue
}
// Get the rule
r, ok := ruleMap[id.(string)]
if !ok {
delete(uuids, "icmp")
continue
}
// Delete the known rule so only unknown rules remain in the ruleMap
delete(ruleMap, id.(string))
// Create a set with all CIDR's
cidrs := &schema.Set{F: schema.HashString}
for _, cidr := range strings.Split(r.Cidrlist, ",") {
cidrs.Add(cidr)
}
// Update the values
rule["protocol"] = r.Protocol
rule["icmp_type"] = r.Icmptype
rule["icmp_code"] = r.Icmpcode
rule["cidr_list"] = cidrs
rules.Add(rule)
}
// If protocol is not ICMP, loop through all ports
if rule["protocol"].(string) != "icmp" {
if ps := rule["ports"].(*schema.Set); ps.Len() > 0 {
// Create an empty schema.Set to hold all ports
ports := &schema.Set{F: schema.HashString}
// Loop through all ports and retrieve their info
for _, port := range ps.List() {
id, ok := uuids[port.(string)]
if !ok {
continue
}
// Get the rule
r, ok := ruleMap[id.(string)]
if !ok {
delete(uuids, port.(string))
continue
}
// Delete the known rule so only unknown rules remain in the ruleMap
delete(ruleMap, id.(string))
// Create a set with all CIDR's
cidrs := &schema.Set{F: schema.HashString}
for _, cidr := range strings.Split(r.Cidrlist, ",") {
cidrs.Add(cidr)
}
// Update the values
rule["protocol"] = r.Protocol
rule["cidr_list"] = cidrs
ports.Add(port)
}
// If there is at least one port found, add this rule to the rules set
if ports.Len() > 0 {
rule["ports"] = ports
rules.Add(rule)
}
}
}
}
}
// If this is a managed firewall, add all unknown rules into a single dummy rule
managed := d.Get("managed").(bool)
if managed && len(ruleMap) > 0 {
for uuid := range ruleMap {
// We need to create and add a dummy value to a schema.Set as the
// cidr_list is a required field and thus needs a value
cidrs := &schema.Set{F: schema.HashString}
cidrs.Add(uuid)
// Make a dummy rule to hold the unknown UUID
rule := map[string]interface{}{
"cidr_list": cidrs,
"protocol": uuid,
"uuids": map[string]interface{}{uuid: uuid},
}
// Add the dummy rule to the rules set
rules.Add(rule)
}
}
if rules.Len() > 0 {
d.Set("rule", rules)
} else if !managed {
d.SetId("")
}
return nil
}
func resourceCloudStackFirewallUpdate(d *schema.ResourceData, meta interface{}) error {
// Make sure all required parameters are there
if err := verifyFirewallParams(d); err != nil {
return err
}
// Check if the rule set as a whole has changed
if d.HasChange("rule") {
o, n := d.GetChange("rule")
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
rules := o.(*schema.Set).Intersection(n.(*schema.Set))
// First loop through all the old rules and delete them
if ors.Len() > 0 {
err := deleteFirewallRules(d, meta, rules, ors)
// We need to update this first to preserve the correct state
d.Set("rule", rules)
if err != nil {
return err
}
}
// Then loop through all the new rules and create them
if nrs.Len() > 0 {
err := createFirewallRules(d, meta, rules, nrs)
// We need to update this first to preserve the correct state
d.Set("rule", rules)
if err != nil {
return err
}
}
}
return resourceCloudStackFirewallRead(d, meta)
}
func resourceCloudStackFirewallDelete(d *schema.ResourceData, meta interface{}) error {
// Create an empty rule set to hold all rules that where
// not deleted correctly
rules := resourceCloudStackFirewall().Schema["rule"].ZeroValue().(*schema.Set)
// Delete all rules
if ors := d.Get("rule").(*schema.Set); ors.Len() > 0 {
err := deleteFirewallRules(d, meta, rules, ors)
// We need to update this first to preserve the correct state
d.Set("rule", rules)
if err != nil {
return err
}
}
return nil
}
func deleteFirewallRules(d *schema.ResourceData, meta interface{}, rules *schema.Set, ors *schema.Set) error {
var errs *multierror.Error
var wg sync.WaitGroup
wg.Add(ors.Len())
sem := make(chan struct{}, d.Get("parallelism").(int))
for _, rule := range ors.List() {
// Put a sleep here to avoid DoS'ing the API
time.Sleep(500 * time.Millisecond)
go func(rule map[string]interface{}) {
defer wg.Done()
sem <- struct{}{}
// Delete a single rule
err := deleteFirewallRule(d, meta, rule)
// If we have at least one UUID, we need to save the rule
if len(rule["uuids"].(map[string]interface{})) > 0 {
rules.Add(rule)
}
if err != nil {
errs = multierror.Append(errs, err)
}
<-sem
}(rule.(map[string]interface{}))
}
wg.Wait()
return errs.ErrorOrNil()
}
func deleteFirewallRule(d *schema.ResourceData, meta interface{}, rule map[string]interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
uuids := rule["uuids"].(map[string]interface{})
for k, id := range uuids {
// We don't care about the count here, so just continue
if k == "%" {
continue
}
// Create the parameter struct
p := cs.Firewall.NewDeleteFirewallRuleParams(id.(string))
// Delete the rule
if _, err := cs.Firewall.DeleteFirewallRule(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", id.(string))) {
delete(uuids, k)
continue
}
return err
}
// Delete the UUID of this rule
delete(uuids, k)
rule["uuids"] = uuids
}
return nil
}
func verifyFirewallParams(d *schema.ResourceData) error {
managed := d.Get("managed").(bool)
_, rules := d.GetOk("rule")
if !rules && !managed {
return fmt.Errorf(
"You must supply at least one 'rule' when not using the 'managed' firewall feature")
}
return nil
}
func verifyFirewallRuleParams(d *schema.ResourceData, rule map[string]interface{}) error {
protocol := rule["protocol"].(string)
if protocol != "tcp" && protocol != "udp" && protocol != "icmp" {
return fmt.Errorf(
"%q is not a valid protocol. Valid options are 'tcp', 'udp' and 'icmp'", protocol)
}
if protocol == "icmp" {
if _, ok := rule["icmp_type"]; !ok {
return fmt.Errorf(
"Parameter icmp_type is a required parameter when using protocol 'icmp'")
}
if _, ok := rule["icmp_code"]; !ok {
return fmt.Errorf(
"Parameter icmp_code is a required parameter when using protocol 'icmp'")
}
} else {
if ports, ok := rule["ports"].(*schema.Set); ok {
for _, port := range ports.List() {
m := splitPorts.FindStringSubmatch(port.(string))
if m == nil {
return fmt.Errorf(
"%q is not a valid port value. Valid options are '80' or '80-90'", port.(string))
}
}
} else {
return fmt.Errorf(
"Parameter ports is a required parameter when *not* using protocol 'icmp'")
}
}
return nil
}