forked from hashicorp/terraform
/
resource_aws_network_acl_rule.go
247 lines (220 loc) · 7.34 KB
/
resource_aws_network_acl_rule.go
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package aws
import (
"bytes"
"fmt"
"log"
"strconv"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsNetworkAclRule() *schema.Resource {
return &schema.Resource{
Create: resourceAwsNetworkAclRuleCreate,
Read: resourceAwsNetworkAclRuleRead,
Delete: resourceAwsNetworkAclRuleDelete,
Schema: map[string]*schema.Schema{
"network_acl_id": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"rule_number": &schema.Schema{
Type: schema.TypeInt,
Required: true,
ForceNew: true,
},
"egress": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
ForceNew: true,
Default: false,
},
"protocol": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"rule_action": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"cidr_block": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"from_port": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ForceNew: true,
},
"to_port": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ForceNew: true,
},
"icmp_type": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ForceNew: true,
},
"icmp_code": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
ForceNew: true,
},
},
}
}
func resourceAwsNetworkAclRuleCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
protocol := d.Get("protocol").(string)
p, protocolErr := strconv.Atoi(protocol)
if protocolErr != nil {
var ok bool
p, ok = protocolIntegers()[protocol]
if !ok {
return fmt.Errorf("Invalid Protocol %s for rule %#v", protocol, d.Get("rule_number").(int))
}
}
log.Printf("[INFO] Transformed Protocol %s into %d", protocol, p)
params := &ec2.CreateNetworkAclEntryInput{
NetworkAclId: aws.String(d.Get("network_acl_id").(string)),
Egress: aws.Bool(d.Get("egress").(bool)),
RuleNumber: aws.Int64(int64(d.Get("rule_number").(int))),
Protocol: aws.String(strconv.Itoa(p)),
CidrBlock: aws.String(d.Get("cidr_block").(string)),
RuleAction: aws.String(d.Get("rule_action").(string)),
PortRange: &ec2.PortRange{
From: aws.Int64(int64(d.Get("from_port").(int))),
To: aws.Int64(int64(d.Get("to_port").(int))),
},
}
// Specify additional required fields for ICMP
if p == 1 {
params.IcmpTypeCode = &ec2.IcmpTypeCode{}
if v, ok := d.GetOk("icmp_code"); ok {
params.IcmpTypeCode.Code = aws.Int64(int64(v.(int)))
}
if v, ok := d.GetOk("icmp_type"); ok {
params.IcmpTypeCode.Type = aws.Int64(int64(v.(int)))
}
}
log.Printf("[INFO] Creating Network Acl Rule: %d (%t)", d.Get("rule_number").(int), d.Get("egress").(bool))
_, err := conn.CreateNetworkAclEntry(params)
if err != nil {
return fmt.Errorf("Error Creating Network Acl Rule: %s", err.Error())
}
d.SetId(networkAclIdRuleNumberEgressHash(d.Get("network_acl_id").(string), d.Get("rule_number").(int), d.Get("egress").(bool), d.Get("protocol").(string)))
// It appears it might be a while until the newly created rule is visible via the
// API (see issue GH-4721). Retry the `findNetworkAclRule` function until it is
// visible (which in most cases is likely immediately).
err = resource.Retry(3*time.Minute, func() *resource.RetryError {
_, findErr := findNetworkAclRule(d, meta)
if findErr != nil {
return resource.RetryableError(findErr)
}
return nil
})
if err != nil {
return fmt.Errorf("Created Network ACL Rule was not visible in API within 3 minute period. Running 'terraform apply' again will resume infrastructure creation.")
}
return resourceAwsNetworkAclRuleRead(d, meta)
}
func resourceAwsNetworkAclRuleRead(d *schema.ResourceData, meta interface{}) error {
resp, err := findNetworkAclRule(d, meta)
if err != nil {
return err
}
d.Set("rule_number", resp.RuleNumber)
d.Set("cidr_block", resp.CidrBlock)
d.Set("egress", resp.Egress)
if resp.IcmpTypeCode != nil {
d.Set("icmp_code", resp.IcmpTypeCode.Code)
d.Set("icmp_type", resp.IcmpTypeCode.Type)
}
if resp.PortRange != nil {
d.Set("from_port", resp.PortRange.From)
d.Set("to_port", resp.PortRange.To)
}
d.Set("rule_action", resp.RuleAction)
p, protocolErr := strconv.Atoi(*resp.Protocol)
log.Printf("[INFO] Converting the protocol %v", p)
if protocolErr == nil {
var ok bool
protocol, ok := protocolStrings(protocolIntegers())[p]
if !ok {
return fmt.Errorf("Invalid Protocol %s for rule %#v", *resp.Protocol, d.Get("rule_number").(int))
}
log.Printf("[INFO] Transformed Protocol %s back into %s", *resp.Protocol, protocol)
d.Set("protocol", protocol)
}
return nil
}
func resourceAwsNetworkAclRuleDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).ec2conn
params := &ec2.DeleteNetworkAclEntryInput{
NetworkAclId: aws.String(d.Get("network_acl_id").(string)),
RuleNumber: aws.Int64(int64(d.Get("rule_number").(int))),
Egress: aws.Bool(d.Get("egress").(bool)),
}
log.Printf("[INFO] Deleting Network Acl Rule: %s", d.Id())
_, err := conn.DeleteNetworkAclEntry(params)
if err != nil {
return fmt.Errorf("Error Deleting Network Acl Rule: %s", err.Error())
}
return nil
}
func findNetworkAclRule(d *schema.ResourceData, meta interface{}) (*ec2.NetworkAclEntry, error) {
conn := meta.(*AWSClient).ec2conn
filters := make([]*ec2.Filter, 0, 2)
ruleNumberFilter := &ec2.Filter{
Name: aws.String("entry.rule-number"),
Values: []*string{aws.String(fmt.Sprintf("%v", d.Get("rule_number").(int)))},
}
filters = append(filters, ruleNumberFilter)
egressFilter := &ec2.Filter{
Name: aws.String("entry.egress"),
Values: []*string{aws.String(fmt.Sprintf("%v", d.Get("egress").(bool)))},
}
filters = append(filters, egressFilter)
params := &ec2.DescribeNetworkAclsInput{
NetworkAclIds: []*string{aws.String(d.Get("network_acl_id").(string))},
Filters: filters,
}
log.Printf("[INFO] Describing Network Acl: %s", d.Get("network_acl_id").(string))
log.Printf("[INFO] Describing Network Acl with the Filters %#v", params)
resp, err := conn.DescribeNetworkAcls(params)
if err != nil {
return nil, fmt.Errorf("Error Finding Network Acl Rule %d: %s", d.Get("rule_number").(int), err.Error())
}
if resp == nil || len(resp.NetworkAcls) != 1 || resp.NetworkAcls[0] == nil {
return nil, fmt.Errorf(
"Expected to find one Network ACL, got: %#v",
resp.NetworkAcls)
}
networkAcl := resp.NetworkAcls[0]
if networkAcl.Entries != nil {
for _, i := range networkAcl.Entries {
if *i.RuleNumber == int64(d.Get("rule_number").(int)) && *i.Egress == d.Get("egress").(bool) {
return i, nil
}
}
}
return nil, fmt.Errorf(
"Expected the Network ACL to have Entries, got: %#v",
networkAcl)
}
func networkAclIdRuleNumberEgressHash(networkAclId string, ruleNumber int, egress bool, protocol string) string {
var buf bytes.Buffer
buf.WriteString(fmt.Sprintf("%s-", networkAclId))
buf.WriteString(fmt.Sprintf("%d-", ruleNumber))
buf.WriteString(fmt.Sprintf("%t-", egress))
buf.WriteString(fmt.Sprintf("%s-", protocol))
return fmt.Sprintf("nacl-%d", hashcode.String(buf.String()))
}