537 lines
13 KiB
Go
537 lines
13 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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"time"
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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/service/ec2"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/resource"
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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: 2,
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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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StateFunc: protocolStateFunc,
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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", "self"},
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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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ConflictsWith: []string{"cidr_blocks"},
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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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awsMutexKV.Lock(sg_id)
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defer awsMutexKV.Unlock(sg_id)
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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, err := expandIPPerm(d, sg)
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if err != nil {
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return err
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}
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ruleType := d.Get("type").(string)
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isVPC := sg.VpcId != nil && *sg.VpcId != ""
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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", 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 !isVPC {
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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 on (%s). 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`, sg_id, 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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id := ipPermissionIDHash(sg_id, ruleType, perm)
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log.Printf("[DEBUG] Computed group rule ID %s", id)
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retErr := resource.Retry(5*time.Minute, func() *resource.RetryError {
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sg, err := findResourceSecurityGroup(conn, sg_id)
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if err != nil {
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log.Printf("[DEBUG] Error finding Secuirty Group (%s) for Rule (%s): %s", sg_id, id, err)
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return resource.NonRetryableError(err)
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}
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var rules []*ec2.IpPermission
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switch ruleType {
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case "ingress":
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rules = sg.IpPermissions
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default:
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rules = sg.IpPermissionsEgress
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}
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rule := findRuleMatch(perm, rules, isVPC)
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if rule == nil {
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log.Printf("[DEBUG] Unable to find matching %s Security Group Rule (%s) for Group %s",
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ruleType, id, sg_id)
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return resource.RetryableError(fmt.Errorf("No match found"))
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}
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log.Printf("[DEBUG] Found rule for Security Group Rule (%s): %s", id, rule)
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return nil
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})
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if retErr != nil {
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log.Printf("[DEBUG] Error finding matching %s Security Group Rule (%s) for Group %s -- NO STATE WILL BE SAVED",
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ruleType, id, sg_id)
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return nil
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}
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d.SetId(id)
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return nil
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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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log.Printf("[DEBUG] Error finding Secuirty Group (%s) for Rule (%s): %s", sg_id, d.Id(), err)
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d.SetId("")
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return nil
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}
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isVPC := sg.VpcId != nil && *sg.VpcId != ""
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var rule *ec2.IpPermission
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var rules []*ec2.IpPermission
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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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rules = sg.IpPermissions
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default:
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rules = sg.IpPermissionsEgress
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}
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p, err := expandIPPerm(d, sg)
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if err != nil {
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return err
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}
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if len(rules) == 0 {
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log.Printf("[WARN] No %s rules were found for Security Group (%s) looking for Security Group Rule (%s)",
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ruleType, *sg.GroupName, d.Id())
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d.SetId("")
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return nil
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}
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rule = findRuleMatch(p, rules, isVPC)
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if rule == nil {
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log.Printf("[DEBUG] Unable to find matching %s Security Group Rule (%s) for Group %s",
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ruleType, d.Id(), sg_id)
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d.SetId("")
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return nil
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}
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log.Printf("[DEBUG] Found rule for Security Group Rule (%s): %s", d.Id(), rule)
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d.Set("type", ruleType)
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setFromIPPerm(d, sg, p)
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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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awsMutexKV.Lock(sg_id)
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defer awsMutexKV.Unlock(sg_id)
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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, err := expandIPPerm(d, sg)
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if err != nil {
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return err
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}
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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, 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 findRuleMatch(p *ec2.IpPermission, rules []*ec2.IpPermission, isVPC bool) *ec2.IpPermission {
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var rule *ec2.IpPermission
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for _, r := range rules {
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if r.ToPort != nil && *p.ToPort != *r.ToPort {
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continue
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}
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if r.FromPort != nil && *p.FromPort != *r.FromPort {
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continue
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}
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if r.IpProtocol != nil && *p.IpProtocol != *r.IpProtocol {
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continue
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}
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remaining := len(p.IpRanges)
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for _, ip := range p.IpRanges {
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for _, rip := range r.IpRanges {
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if *ip.CidrIp == *rip.CidrIp {
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remaining--
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}
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}
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}
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if remaining > 0 {
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continue
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}
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remaining = len(p.UserIdGroupPairs)
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for _, ip := range p.UserIdGroupPairs {
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for _, rip := range r.UserIdGroupPairs {
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if isVPC {
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if *ip.GroupId == *rip.GroupId {
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remaining--
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}
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} else {
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if *ip.GroupName == *rip.GroupName {
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remaining--
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}
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}
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}
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}
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if remaining > 0 {
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continue
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}
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rule = r
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}
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return rule
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}
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func ipPermissionIDHash(sg_id, ruleType string, ip *ec2.IpPermission) string {
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var buf bytes.Buffer
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buf.WriteString(fmt.Sprintf("%s-", sg_id))
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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("sgrule-%d", hashcode.String(buf.String()))
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}
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func expandIPPerm(d *schema.ResourceData, sg *ec2.SecurityGroup) (*ec2.IpPermission, error) {
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var perm ec2.IpPermission
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perm.FromPort = aws.Int64(int64(d.Get("from_port").(int)))
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perm.ToPort = aws.Int64(int64(d.Get("to_port").(int)))
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protocol := protocolForValue(d.Get("protocol").(string))
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perm.IpProtocol = aws.String(protocol)
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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.GroupId != nil {
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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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cidrIP, ok := v.(string)
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if !ok {
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return nil, fmt.Errorf("empty element found in cidr_blocks - consider using the compact function")
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}
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perm.IpRanges[i] = &ec2.IpRange{CidrIp: aws.String(cidrIP)}
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}
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}
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return &perm, nil
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}
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func setFromIPPerm(d *schema.ResourceData, sg *ec2.SecurityGroup, rule *ec2.IpPermission) error {
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isVPC := sg.VpcId != nil && *sg.VpcId != ""
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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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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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// 'self' is false by default. Below, we range over the group ids and set true
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// if the parent sg id is found
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d.Set("self", false)
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if len(rule.UserIdGroupPairs) > 0 {
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s := rule.UserIdGroupPairs[0]
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// Check for Pair that is the same as the Security Group, to denote self.
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// Otherwise, mark the group id in source_security_group_id
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if isVPC {
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if *s.GroupId == *sg.GroupId {
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d.Set("self", true)
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}
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d.Set("source_security_group_id", *s.GroupId)
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} else {
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if *s.GroupName == *sg.GroupName {
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d.Set("self", true)
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}
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d.Set("source_security_group_id", *s.GroupName)
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}
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}
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return nil
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}
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