/
resource_aws_cloudwatch_event_permission.go
320 lines (272 loc) · 10.7 KB
/
resource_aws_cloudwatch_event_permission.go
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package aws
import (
"encoding/json"
"fmt"
"log"
"regexp"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/arn"
events "github.com/aws/aws-sdk-go/service/cloudwatchevents"
"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"github.com/hashicorp/terraform/helper/validation"
)
func resourceAwsCloudWatchEventPermission() *schema.Resource {
return &schema.Resource{
Create: resourceAwsCloudWatchEventPermissionCreate,
Read: resourceAwsCloudWatchEventPermissionRead,
Update: resourceAwsCloudWatchEventPermissionUpdate,
Delete: resourceAwsCloudWatchEventPermissionDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
"action": {
Type: schema.TypeString,
Optional: true,
Default: "events:PutEvents",
ValidateFunc: validateCloudWatchEventPermissionAction,
},
"condition": {
Type: schema.TypeList,
Optional: true,
MaxItems: 1,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"key": {
Type: schema.TypeString,
Required: true,
ValidateFunc: validation.StringInSlice([]string{"aws:PrincipalOrgID"}, false),
},
"type": {
Type: schema.TypeString,
Required: true,
ValidateFunc: validation.StringInSlice([]string{"StringEquals"}, false),
},
"value": {
Type: schema.TypeString,
Required: true,
ValidateFunc: validation.NoZeroValues,
},
},
},
},
"principal": {
Type: schema.TypeString,
Required: true,
ValidateFunc: validateCloudWatchEventPermissionPrincipal,
},
"statement_id": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
ValidateFunc: validateCloudWatchEventPermissionStatementID,
},
},
}
}
func resourceAwsCloudWatchEventPermissionCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).cloudwatcheventsconn
statementID := d.Get("statement_id").(string)
input := events.PutPermissionInput{
Action: aws.String(d.Get("action").(string)),
Condition: expandCloudWatchEventsCondition(d.Get("condition").([]interface{})),
Principal: aws.String(d.Get("principal").(string)),
StatementId: aws.String(statementID),
}
log.Printf("[DEBUG] Creating CloudWatch Events permission: %s", input)
_, err := conn.PutPermission(&input)
if err != nil {
return fmt.Errorf("Creating CloudWatch Events permission failed: %s", err.Error())
}
d.SetId(statementID)
return resourceAwsCloudWatchEventPermissionRead(d, meta)
}
// See also: https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_DescribeEventBus.html
func resourceAwsCloudWatchEventPermissionRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).cloudwatcheventsconn
input := events.DescribeEventBusInput{}
var policyDoc CloudWatchEventPermissionPolicyDoc
var policyStatement *CloudWatchEventPermissionPolicyStatement
// Especially with concurrent PutPermission calls there can be a slight delay
err := resource.Retry(1*time.Minute, func() *resource.RetryError {
log.Printf("[DEBUG] Reading CloudWatch Events bus: %s", input)
debo, err := conn.DescribeEventBus(&input)
if err != nil {
return resource.NonRetryableError(fmt.Errorf("Reading CloudWatch Events permission '%s' failed: %s", d.Id(), err.Error()))
}
if debo.Policy == nil {
return resource.RetryableError(fmt.Errorf("CloudWatch Events permission %q not found", d.Id()))
}
err = json.Unmarshal([]byte(*debo.Policy), &policyDoc)
if err != nil {
return resource.NonRetryableError(fmt.Errorf("Reading CloudWatch Events permission '%s' failed: %s", d.Id(), err.Error()))
}
policyStatement, err = findCloudWatchEventPermissionPolicyStatementByID(&policyDoc, d.Id())
return resource.RetryableError(err)
})
if err != nil {
// Missing statement inside valid policy
if nfErr, ok := err.(*resource.NotFoundError); ok {
log.Printf("[WARN] %s", nfErr)
d.SetId("")
return nil
}
return err
}
d.Set("action", policyStatement.Action)
if err := d.Set("condition", flattenCloudWatchEventPermissionPolicyStatementCondition(policyStatement.Condition)); err != nil {
return fmt.Errorf("error setting condition: %s", err)
}
principalString, ok := policyStatement.Principal.(string)
if ok && (principalString == "*") {
d.Set("principal", "*")
} else {
principalMap := policyStatement.Principal.(map[string]interface{})
policyARN, err := arn.Parse(principalMap["AWS"].(string))
if err != nil {
return fmt.Errorf("Reading CloudWatch Events permission '%s' failed: %s", d.Id(), err.Error())
}
d.Set("principal", policyARN.AccountID)
}
d.Set("statement_id", policyStatement.Sid)
return nil
}
func resourceAwsCloudWatchEventPermissionUpdate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).cloudwatcheventsconn
input := events.PutPermissionInput{
Action: aws.String(d.Get("action").(string)),
Condition: expandCloudWatchEventsCondition(d.Get("condition").([]interface{})),
Principal: aws.String(d.Get("principal").(string)),
StatementId: aws.String(d.Get("statement_id").(string)),
}
log.Printf("[DEBUG] Update CloudWatch Events permission: %s", input)
_, err := conn.PutPermission(&input)
if err != nil {
return fmt.Errorf("Updating CloudWatch Events permission '%s' failed: %s", d.Id(), err.Error())
}
return resourceAwsCloudWatchEventPermissionRead(d, meta)
}
func resourceAwsCloudWatchEventPermissionDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).cloudwatcheventsconn
input := events.RemovePermissionInput{
StatementId: aws.String(d.Id()),
}
log.Printf("[DEBUG] Delete CloudWatch Events permission: %s", input)
_, err := conn.RemovePermission(&input)
if err != nil {
return fmt.Errorf("Deleting CloudWatch Events permission '%s' failed: %s", d.Id(), err.Error())
}
return nil
}
// https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_PutPermission.html#API_PutPermission_RequestParameters
func validateCloudWatchEventPermissionAction(v interface{}, k string) (ws []string, es []error) {
value := v.(string)
if (len(value) < 1) || (len(value) > 64) {
es = append(es, fmt.Errorf("%q must be between 1 and 64 characters", k))
}
if !regexp.MustCompile(`^events:[a-zA-Z]+$`).MatchString(value) {
es = append(es, fmt.Errorf("%q must be: events: followed by one or more alphabetic characters", k))
}
return
}
// https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_PutPermission.html#API_PutPermission_RequestParameters
func validateCloudWatchEventPermissionPrincipal(v interface{}, k string) (ws []string, es []error) {
value := v.(string)
if !regexp.MustCompile(`^(\d{12}|\*)$`).MatchString(value) {
es = append(es, fmt.Errorf("%q must be * or a 12 digit AWS account ID", k))
}
return
}
// https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_PutPermission.html#API_PutPermission_RequestParameters
func validateCloudWatchEventPermissionStatementID(v interface{}, k string) (ws []string, es []error) {
value := v.(string)
if (len(value) < 1) || (len(value) > 64) {
es = append(es, fmt.Errorf("%q must be between 1 and 64 characters", k))
}
if !regexp.MustCompile(`^[a-zA-Z0-9-_]+$`).MatchString(value) {
es = append(es, fmt.Errorf("%q must be one or more alphanumeric, hyphen, or underscore characters", k))
}
return
}
// CloudWatchEventPermissionPolicyDoc represents the Policy attribute of DescribeEventBus
// See also: https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_DescribeEventBus.html
type CloudWatchEventPermissionPolicyDoc struct {
Version string
ID string `json:"Id,omitempty"`
Statements []CloudWatchEventPermissionPolicyStatement `json:"Statement"`
}
// CloudWatchEventPermissionPolicyStatement represents the Statement attribute of CloudWatchEventPermissionPolicyDoc
// See also: https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_DescribeEventBus.html
type CloudWatchEventPermissionPolicyStatement struct {
Sid string
Effect string
Action string
Condition *CloudWatchEventPermissionPolicyStatementCondition `json:"Condition,omitempty"`
Principal interface{} // "*" or {"AWS": "arn:aws:iam::111111111111:root"}
Resource string
}
// CloudWatchEventPermissionPolicyStatementCondition represents the Condition attribute of CloudWatchEventPermissionPolicyStatement
// See also: https://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_DescribeEventBus.html
type CloudWatchEventPermissionPolicyStatementCondition struct {
Key string
Type string
Value string
}
func (condition *CloudWatchEventPermissionPolicyStatementCondition) UnmarshalJSON(b []byte) error {
var out CloudWatchEventPermissionPolicyStatementCondition
// JSON representation: \"Condition\":{\"StringEquals\":{\"aws:PrincipalOrgID\":\"o-0123456789\"}}
var data map[string]map[string]string
if err := json.Unmarshal(b, &data); err != nil {
return err
}
for typeKey, typeValue := range data {
for conditionKey, conditionValue := range typeValue {
out = CloudWatchEventPermissionPolicyStatementCondition{
Key: conditionKey,
Type: typeKey,
Value: conditionValue,
}
}
}
*condition = out
return nil
}
func findCloudWatchEventPermissionPolicyStatementByID(policy *CloudWatchEventPermissionPolicyDoc, id string) (
*CloudWatchEventPermissionPolicyStatement, error) {
log.Printf("[DEBUG] Received %d statements in CloudWatch Events permission policy: %s", len(policy.Statements), policy.Statements)
for _, statement := range policy.Statements {
if statement.Sid == id {
return &statement, nil
}
}
return nil, &resource.NotFoundError{
LastRequest: id,
LastResponse: policy,
Message: fmt.Sprintf("Failed to find statement %q in CloudWatch Events permission policy:\n%s", id, policy.Statements),
}
}
func expandCloudWatchEventsCondition(l []interface{}) *events.Condition {
if len(l) == 0 || l[0] == nil {
return nil
}
m := l[0].(map[string]interface{})
condition := &events.Condition{
Key: aws.String(m["key"].(string)),
Type: aws.String(m["type"].(string)),
Value: aws.String(m["value"].(string)),
}
return condition
}
func flattenCloudWatchEventPermissionPolicyStatementCondition(condition *CloudWatchEventPermissionPolicyStatementCondition) []interface{} {
if condition == nil {
return []interface{}{}
}
m := map[string]interface{}{
"key": condition.Key,
"type": condition.Type,
"value": condition.Value,
}
return []interface{}{m}
}