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resource_networkdomain_firewall_rule.go
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resource_networkdomain_firewall_rule.go
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package ddcloud
import (
"fmt"
"log"
"strings"
"github.com/DimensionDataResearch/go-dd-cloud-compute/compute"
"github.com/hashicorp/terraform/helper/schema"
)
const (
resourceKeyNetworkDomainFirewallRuleType = "type"
resourceKeyNetworkDomainFirewallRuleEnabled = "enabled"
)
const defaultFirewallRulePrefix = "CCDEFAULT."
func defaultFirewallRuleNameToType(ruleName string) string {
return strings.TrimPrefix(ruleName, defaultFirewallRulePrefix)
}
func defaultFirewallRuleTypeToName(ruleType string) string {
return defaultFirewallRulePrefix + ruleType
}
// Well-known default rule types.
var defaultRuleTypes = []string{
"BlockOutboundMailIPv4",
"BlockOutboundMailIPv4Secure",
"BlockOutboundMailIPv6",
"BlockOutboundMailIPv6Secure",
"DenyExternalInboundIPv6",
}
// Schema for ddcloud_networkdomain.default_firewall_rule
func schemaNetworkDomainFirewallRule() *schema.Schema {
return &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Description: "One or more default firewall rules (name starts with 'CCDefault.') for the network domain",
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
resourceKeyNetworkDomainFirewallRuleType: &schema.Schema{
Type: schema.TypeString,
Required: true,
ValidateFunc: validateNetworkDomainFirewallRuleType,
Description: "The type of default firewall rule (without the 'CCDefault.' prefix)",
},
resourceKeyNetworkDomainFirewallRuleEnabled: &schema.Schema{
Type: schema.TypeBool,
Required: true,
Description: "Is the firewall rule enabled",
},
},
},
Set: hashNetworkDomainFirewallRule,
}
}
// Read state for a network domain's default firewall rules
func readNetworkDomainDefaultFirewallRules(data *schema.ResourceData, apiClient *compute.Client) error {
networkDomainID := data.Id()
value, ok := data.GetOk(resourceKeyNetworkDomainFirewallRule)
if !ok {
return nil
}
defaultRules := value.(*schema.Set).List()
log.Printf("Read default firewall rules for network domain '%s'...",
networkDomainID,
)
existingRules, err := getNetworkDomainDefaultFirewallRulesByType(data, apiClient)
if err != nil {
return err
}
// We only update state for rules already defined in the network domain's configuration
for _, defaultRule := range defaultRules {
ruleProperties := defaultRule.(map[string]interface{})
ruleType := ruleProperties[resourceKeyNetworkDomainFirewallRuleType].(string)
existingRule, ok := existingRules[ruleType]
if !ok {
return fmt.Errorf("No firewall rule named '%s' found in network domain '%s'",
defaultFirewallRuleTypeToName(ruleType),
networkDomainID,
)
}
ruleProperties[resourceKeyNetworkDomainFirewallRuleEnabled] = existingRule.Enabled
}
// Persist changes.
defaultRuleSet := schema.NewSet(hashNetworkDomainFirewallRule, defaultRules)
data.Set(resourceKeyNetworkDomainFirewallRule, defaultRuleSet)
data.SetPartial(resourceKeyNetworkDomainFirewallRule)
return nil
}
func applyNetworkDomainDefaultFirewallRules(data *schema.ResourceData, apiClient *compute.Client) error {
networkDomainID := data.Id()
defaultRuleSet, ok := data.GetOk(resourceKeyNetworkDomainFirewallRule)
if !ok {
return nil
}
log.Printf("Configure default firewall rules for network domain '%s'...",
networkDomainID,
)
existingRules, err := getNetworkDomainDefaultFirewallRulesByType(data, apiClient)
if err != nil {
return err
}
for _, defaultRule := range defaultRuleSet.(*schema.Set).List() {
ruleProperties := defaultRule.(map[string]interface{})
ruleType := ruleProperties[resourceKeyNetworkDomainFirewallRuleType].(string)
existingRule := existingRules[ruleType]
ruleEnabled := ruleProperties[resourceKeyNetworkDomainFirewallRuleEnabled].(bool)
if ruleEnabled == existingRule.Enabled {
continue // Nothing to do
}
log.Printf("Updating default firewall rule '%s' (%s): Enabled = %t",
existingRule.Name,
existingRule.ID,
ruleEnabled,
)
err = apiClient.EditFirewallRule(existingRule.ID, ruleEnabled)
if err != nil {
return err
}
}
return nil
}
// Get all default (built-in) firewall rules in a network domain, keyed by type (name without prefix).
func getNetworkDomainDefaultFirewallRulesByType(data *schema.ResourceData, apiClient *compute.Client) (rules map[string]compute.FirewallRule, err error) {
networkDomainID := data.Id()
page := compute.DefaultPaging()
page.PageSize = 50
rules = make(map[string]compute.FirewallRule)
for {
var results *compute.FirewallRules
results, err = apiClient.ListFirewallRules(networkDomainID, page)
if err != nil {
return
}
if results.IsEmpty() {
break
}
for _, rule := range results.Rules {
if rule.RuleType != "DEFAULT_RULE" {
continue
}
ruleType := defaultFirewallRuleNameToType(rule.Name)
rules[ruleType] = rule
}
page.Next()
}
return
}
// Produce a hash code to represent the values for a network domain default firewall rule.
func hashNetworkDomainFirewallRule(value interface{}) int {
firewallRule, ok := value.(map[string]interface{})
if !ok {
return -1
}
return schema.HashString(fmt.Sprintf("%s=%t",
firewallRule[resourceKeyNetworkDomainFirewallRuleType],
firewallRule[resourceKeyNetworkDomainFirewallRuleEnabled],
))
}
func validateNetworkDomainFirewallRuleType(value interface{}, propertyName string) (messages []string, errors []error) {
ruleType, ok := value.(string)
if !ok {
errors = append(errors,
fmt.Errorf("Invalid data type for '%s' (expected string)", propertyName),
)
return
}
for _, defaultRuleType := range defaultRuleTypes {
if ruleType == defaultRuleType {
return // Valid
}
}
errors = append(errors,
fmt.Errorf("Invalid firewall rule type '%s' (expected one of [%s])",
ruleType,
strings.Join(defaultRuleTypes, ","),
),
)
return
}