388 lines
9.6 KiB
Go
388 lines
9.6 KiB
Go
package aws
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import (
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"bytes"
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"fmt"
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"log"
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"sort"
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"strings"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/awsutil"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/schema"
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)
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func resourceAwsSecurityGroupRule() *schema.Resource {
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return &schema.Resource{
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Create: resourceAwsSecurityGroupRuleCreate,
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Read: resourceAwsSecurityGroupRuleRead,
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Delete: resourceAwsSecurityGroupRuleDelete,
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SchemaVersion: 1,
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MigrateState: resourceAwsSecurityGroupRuleMigrateState,
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Schema: map[string]*schema.Schema{
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"type": &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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Description: "Type of rule, ingress (inbound) or egress (outbound).",
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},
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"from_port": &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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ForceNew: true,
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},
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"to_port": &schema.Schema{
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Type: schema.TypeInt,
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Required: true,
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ForceNew: true,
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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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ForceNew: true,
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},
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"cidr_blocks": &schema.Schema{
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Type: schema.TypeList,
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Optional: true,
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ForceNew: true,
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Elem: &schema.Schema{Type: schema.TypeString},
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},
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"security_group_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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"source_security_group_id": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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Computed: true,
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ConflictsWith: []string{"cidr_blocks"},
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},
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"self": &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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ForceNew: true,
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},
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},
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}
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}
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func resourceAwsSecurityGroupRuleCreate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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sg_id := d.Get("security_group_id").(string)
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sg, err := findResourceSecurityGroup(conn, sg_id)
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if err != nil {
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return err
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}
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perm := expandIPPerm(d, sg)
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ruleType := d.Get("type").(string)
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var autherr error
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switch ruleType {
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case "ingress":
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log.Printf("[DEBUG] Authorizing security group %s %s rule: %s",
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sg_id, "Ingress", awsutil.StringValue(perm))
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req := &ec2.AuthorizeSecurityGroupIngressInput{
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GroupID: sg.GroupID,
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IPPermissions: []*ec2.IPPermission{perm},
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}
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if sg.VPCID == nil || *sg.VPCID == "" {
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req.GroupID = nil
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req.GroupName = sg.GroupName
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}
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_, autherr = conn.AuthorizeSecurityGroupIngress(req)
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case "egress":
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log.Printf("[DEBUG] Authorizing security group %s %s rule: %#v",
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sg_id, "Egress", perm)
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req := &ec2.AuthorizeSecurityGroupEgressInput{
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GroupID: sg.GroupID,
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IPPermissions: []*ec2.IPPermission{perm},
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}
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_, autherr = conn.AuthorizeSecurityGroupEgress(req)
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default:
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return fmt.Errorf("Security Group Rule must be type 'ingress' or type 'egress'")
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}
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if autherr != nil {
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if awsErr, ok := autherr.(awserr.Error); ok {
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if awsErr.Code() == "InvalidPermission.Duplicate" {
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return fmt.Errorf(`[WARN] A duplicate Security Group rule was found. This may be
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a side effect of a now-fixed Terraform issue causing two security groups with
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identical attributes but different source_security_group_ids to overwrite each
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other in the state. See https://github.com/hashicorp/terraform/pull/2376 for more
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information and instructions for recovery. Error message: %s`, awsErr.Message())
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}
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}
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return fmt.Errorf(
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"Error authorizing security group rule type %s: %s",
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ruleType, autherr)
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}
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d.SetId(ipPermissionIDHash(ruleType, perm))
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return resourceAwsSecurityGroupRuleRead(d, meta)
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}
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func resourceAwsSecurityGroupRuleRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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sg_id := d.Get("security_group_id").(string)
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sg, err := findResourceSecurityGroup(conn, sg_id)
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if err != nil {
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d.SetId("")
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}
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var rule *ec2.IPPermission
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ruleType := d.Get("type").(string)
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var rl []*ec2.IPPermission
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switch ruleType {
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case "ingress":
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rl = sg.IPPermissions
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default:
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rl = sg.IPPermissionsEgress
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}
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for _, r := range rl {
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if d.Id() == ipPermissionIDHash(ruleType, r) {
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rule = r
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}
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}
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if rule == nil {
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log.Printf("[DEBUG] Unable to find matching %s Security Group Rule for Group %s",
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ruleType, sg_id)
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d.SetId("")
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return nil
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}
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d.Set("from_port", rule.FromPort)
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d.Set("to_port", rule.ToPort)
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d.Set("protocol", rule.IPProtocol)
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d.Set("type", ruleType)
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var cb []string
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for _, c := range rule.IPRanges {
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cb = append(cb, *c.CIDRIP)
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}
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d.Set("cidr_blocks", cb)
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if len(rule.UserIDGroupPairs) > 0 {
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s := rule.UserIDGroupPairs[0]
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d.Set("source_security_group_id", *s.GroupID)
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}
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return nil
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}
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func resourceAwsSecurityGroupRuleDelete(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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sg_id := d.Get("security_group_id").(string)
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sg, err := findResourceSecurityGroup(conn, sg_id)
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if err != nil {
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return err
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}
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perm := expandIPPerm(d, sg)
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ruleType := d.Get("type").(string)
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switch ruleType {
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case "ingress":
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log.Printf("[DEBUG] Revoking rule (%s) from security group %s:\n%s",
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"ingress", sg_id, awsutil.StringValue(perm))
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req := &ec2.RevokeSecurityGroupIngressInput{
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GroupID: sg.GroupID,
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IPPermissions: []*ec2.IPPermission{perm},
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}
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_, err = conn.RevokeSecurityGroupIngress(req)
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if err != nil {
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return fmt.Errorf(
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"Error revoking security group %s rules: %s",
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sg_id, err)
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}
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case "egress":
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log.Printf("[DEBUG] Revoking security group %#v %s rule: %#v",
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sg_id, "egress", perm)
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req := &ec2.RevokeSecurityGroupEgressInput{
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GroupID: sg.GroupID,
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IPPermissions: []*ec2.IPPermission{perm},
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}
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_, err = conn.RevokeSecurityGroupEgress(req)
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if err != nil {
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return fmt.Errorf(
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"Error revoking security group %s rules: %s",
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sg_id, err)
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}
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}
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d.SetId("")
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return nil
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}
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func findResourceSecurityGroup(conn *ec2.EC2, id string) (*ec2.SecurityGroup, error) {
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req := &ec2.DescribeSecurityGroupsInput{
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GroupIDs: []*string{aws.String(id)},
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}
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resp, err := conn.DescribeSecurityGroups(req)
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if err != nil {
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return nil, err
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}
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if resp == nil || len(resp.SecurityGroups) != 1 || resp.SecurityGroups[0] == nil {
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return nil, fmt.Errorf(
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"Expected to find one security group with ID %q, got: %#v",
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id, resp.SecurityGroups)
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}
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return resp.SecurityGroups[0], nil
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}
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// ByGroupPair implements sort.Interface for []*ec2.UserIDGroupPairs based on
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// GroupID or GroupName field (only one should be set).
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type ByGroupPair []*ec2.UserIDGroupPair
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func (b ByGroupPair) Len() int { return len(b) }
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func (b ByGroupPair) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
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func (b ByGroupPair) Less(i, j int) bool {
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if b[i].GroupID != nil && b[j].GroupID != nil {
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return *b[i].GroupID < *b[j].GroupID
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}
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if b[i].GroupName != nil && b[j].GroupName != nil {
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return *b[i].GroupName < *b[j].GroupName
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}
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panic("mismatched security group rules, may be a terraform bug")
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}
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func ipPermissionIDHash(ruleType string, ip *ec2.IPPermission) string {
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var buf bytes.Buffer
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if ip.FromPort != nil && *ip.FromPort > 0 {
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buf.WriteString(fmt.Sprintf("%d-", *ip.FromPort))
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}
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if ip.ToPort != nil && *ip.ToPort > 0 {
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buf.WriteString(fmt.Sprintf("%d-", *ip.ToPort))
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}
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buf.WriteString(fmt.Sprintf("%s-", *ip.IPProtocol))
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buf.WriteString(fmt.Sprintf("%s-", ruleType))
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// We need to make sure to sort the strings below so that we always
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// generate the same hash code no matter what is in the set.
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if len(ip.IPRanges) > 0 {
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s := make([]string, len(ip.IPRanges))
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for i, r := range ip.IPRanges {
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s[i] = *r.CIDRIP
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}
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sort.Strings(s)
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for _, v := range s {
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buf.WriteString(fmt.Sprintf("%s-", v))
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}
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}
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if len(ip.UserIDGroupPairs) > 0 {
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sort.Sort(ByGroupPair(ip.UserIDGroupPairs))
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for _, pair := range ip.UserIDGroupPairs {
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if pair.GroupID != nil {
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buf.WriteString(fmt.Sprintf("%s-", *pair.GroupID))
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} else {
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buf.WriteString("-")
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}
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if pair.GroupName != nil {
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buf.WriteString(fmt.Sprintf("%s-", *pair.GroupName))
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} else {
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buf.WriteString("-")
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}
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}
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}
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return fmt.Sprintf("sg-%d", hashcode.String(buf.String()))
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}
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func expandIPPerm(d *schema.ResourceData, sg *ec2.SecurityGroup) *ec2.IPPermission {
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var perm ec2.IPPermission
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perm.FromPort = aws.Long(int64(d.Get("from_port").(int)))
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perm.ToPort = aws.Long(int64(d.Get("to_port").(int)))
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perm.IPProtocol = aws.String(d.Get("protocol").(string))
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// build a group map that behaves like a set
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groups := make(map[string]bool)
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if raw, ok := d.GetOk("source_security_group_id"); ok {
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groups[raw.(string)] = true
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}
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if v, ok := d.GetOk("self"); ok && v.(bool) {
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if sg.VPCID != nil && *sg.VPCID != "" {
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groups[*sg.GroupID] = true
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} else {
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groups[*sg.GroupName] = true
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}
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}
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if len(groups) > 0 {
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perm.UserIDGroupPairs = make([]*ec2.UserIDGroupPair, len(groups))
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// build string list of group name/ids
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var gl []string
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for k, _ := range groups {
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gl = append(gl, k)
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}
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for i, name := range gl {
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ownerId, id := "", name
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if items := strings.Split(id, "/"); len(items) > 1 {
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ownerId, id = items[0], items[1]
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}
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perm.UserIDGroupPairs[i] = &ec2.UserIDGroupPair{
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GroupID: aws.String(id),
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UserID: aws.String(ownerId),
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}
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if sg.VPCID == nil || *sg.VPCID == "" {
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perm.UserIDGroupPairs[i].GroupID = nil
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perm.UserIDGroupPairs[i].GroupName = aws.String(id)
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perm.UserIDGroupPairs[i].UserID = nil
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}
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}
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}
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if raw, ok := d.GetOk("cidr_blocks"); ok {
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list := raw.([]interface{})
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perm.IPRanges = make([]*ec2.IPRange, len(list))
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for i, v := range list {
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perm.IPRanges[i] = &ec2.IPRange{CIDRIP: aws.String(v.(string))}
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}
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}
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return &perm
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}
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