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