provider/aws: Add support for CloudWatch Events #4986
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,252 @@ | ||
| package aws | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log" | ||
| "regexp" | ||
| "time" | ||
|
|
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| "github.com/aws/aws-sdk-go/aws/awserr" | ||
| "github.com/hashicorp/terraform/helper/resource" | ||
| "github.com/hashicorp/terraform/helper/schema" | ||
|
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| "github.com/aws/aws-sdk-go/aws" | ||
| events "github.com/aws/aws-sdk-go/service/cloudwatchevents" | ||
| ) | ||
|
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| func resourceAwsCloudWatchEventRule() *schema.Resource { | ||
| return &schema.Resource{ | ||
| Create: resourceAwsCloudWatchEventRuleCreate, | ||
| Read: resourceAwsCloudWatchEventRuleRead, | ||
| Update: resourceAwsCloudWatchEventRuleUpdate, | ||
| Delete: resourceAwsCloudWatchEventRuleDelete, | ||
|
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| Schema: map[string]*schema.Schema{ | ||
| "name": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Required: true, | ||
| ForceNew: true, | ||
| ValidateFunc: validateCloudWatchEventRuleName, | ||
| }, | ||
| "schedule_expression": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Optional: true, | ||
| ValidateFunc: validateMaxLength(256), | ||
| }, | ||
| "event_pattern": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Optional: true, | ||
| ValidateFunc: validateMaxLength(2048), | ||
| StateFunc: normalizeJson, | ||
| }, | ||
| "description": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Optional: true, | ||
| ValidateFunc: validateMaxLength(512), | ||
| }, | ||
| "role_arn": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Optional: true, | ||
| ValidateFunc: validateMaxLength(1600), | ||
| }, | ||
| "is_enabled": &schema.Schema{ | ||
| Type: schema.TypeBool, | ||
| Optional: true, | ||
| Default: true, | ||
| }, | ||
| "arn": &schema.Schema{ | ||
| Type: schema.TypeString, | ||
| Computed: true, | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
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| func resourceAwsCloudWatchEventRuleCreate(d *schema.ResourceData, meta interface{}) error { | ||
| conn := meta.(*AWSClient).cloudwatcheventsconn | ||
|
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| input := buildPutRuleInputStruct(d) | ||
| log.Printf("[DEBUG] Creating CloudWatch Event Rule: %s", input) | ||
|
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| // IAM Roles take some time to propagate | ||
| var out *events.PutRuleOutput | ||
| err := resource.Retry(30*time.Second, func() error { | ||
| var err error | ||
| out, err = conn.PutRule(input) | ||
| pattern := regexp.MustCompile("cannot be assumed by principal '[a-z]+\\.amazonaws\\.com'\\.$") | ||
| if err != nil { | ||
| if awsErr, ok := err.(awserr.Error); ok { | ||
| if awsErr.Code() == "ValidationException" && pattern.MatchString(awsErr.Message()) { | ||
| log.Printf("[DEBUG] Retrying creation of CloudWatch Event Rule %q", *input.Name) | ||
| return err | ||
| } | ||
| } | ||
| return &resource.RetryError{ | ||
| Err: err, | ||
| } | ||
| } | ||
| return nil | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("Creating CloudWatch Event Rule failed: %s", err) | ||
| } | ||
|
|
||
| d.Set("arn", out.RuleArn) | ||
| d.SetId(d.Get("name").(string)) | ||
|
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| log.Printf("[INFO] CloudWatch Event Rule %q created", *out.RuleArn) | ||
|
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| return resourceAwsCloudWatchEventRuleUpdate(d, meta) | ||
| } | ||
|
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| func resourceAwsCloudWatchEventRuleRead(d *schema.ResourceData, meta interface{}) error { | ||
| conn := meta.(*AWSClient).cloudwatcheventsconn | ||
|
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| input := events.DescribeRuleInput{ | ||
| Name: aws.String(d.Id()), | ||
| } | ||
| log.Printf("[DEBUG] Reading CloudWatch Event Rule: %s", input) | ||
| out, err := conn.DescribeRule(&input) | ||
| if awsErr, ok := err.(awserr.Error); ok { | ||
| if awsErr.Code() == "ResourceNotFoundException" { | ||
| log.Printf("[WARN] Removing CloudWatch Event Rule %q because it's gone.", d.Id()) | ||
| d.SetId("") | ||
| return nil | ||
| } | ||
| } | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("[DEBUG] Found Event Rule: %s", out) | ||
|
|
||
| d.Set("arn", out.Arn) | ||
| d.Set("description", out.Description) | ||
| if out.EventPattern != nil { | ||
| d.Set("event_pattern", normalizeJson(*out.EventPattern)) | ||
| } | ||
| d.Set("name", out.Name) | ||
| d.Set("role_arn", out.RoleArn) | ||
| d.Set("schedule_expression", out.ScheduleExpression) | ||
|
|
||
| boolState, err := getBooleanStateFromString(*out.State) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("[DEBUG] Setting boolean state: %t", boolState) | ||
| d.Set("is_enabled", boolState) | ||
|
|
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| return nil | ||
| } | ||
|
|
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| func resourceAwsCloudWatchEventRuleUpdate(d *schema.ResourceData, meta interface{}) error { | ||
| conn := meta.(*AWSClient).cloudwatcheventsconn | ||
|
|
||
| if d.HasChange("is_enabled") && d.Get("is_enabled").(bool) { | ||
| log.Printf("[DEBUG] Enabling CloudWatch Event Rule %q", d.Id()) | ||
| _, err := conn.EnableRule(&events.EnableRuleInput{ | ||
| Name: aws.String(d.Id()), | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("[DEBUG] CloudWatch Event Rule (%q) enabled", d.Id()) | ||
| } | ||
|
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| input := buildPutRuleInputStruct(d) | ||
| log.Printf("[DEBUG] Updating CloudWatch Event Rule: %s", input) | ||
|
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| // IAM Roles take some time to propagate | ||
| var out *events.PutRuleOutput | ||
| err := resource.Retry(30*time.Second, func() error { | ||
| var err error | ||
| out, err = conn.PutRule(input) | ||
| pattern := regexp.MustCompile("cannot be assumed by principal '[a-z]+\\.amazonaws\\.com'\\.$") | ||
| if err != nil { | ||
| if awsErr, ok := err.(awserr.Error); ok { | ||
| if awsErr.Code() == "ValidationException" && pattern.MatchString(awsErr.Message()) { | ||
| log.Printf("[DEBUG] Retrying update of CloudWatch Event Rule %q", *input.Name) | ||
| return err | ||
| } | ||
| } | ||
| return &resource.RetryError{ | ||
| Err: err, | ||
| } | ||
| } | ||
| return nil | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("Updating CloudWatch Event Rule failed: %s", err) | ||
| } | ||
|
|
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| if d.HasChange("is_enabled") && !d.Get("is_enabled").(bool) { | ||
| log.Printf("[DEBUG] Disabling CloudWatch Event Rule %q", d.Id()) | ||
| _, err := conn.DisableRule(&events.DisableRuleInput{ | ||
| Name: aws.String(d.Id()), | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("[DEBUG] CloudWatch Event Rule (%q) disabled", d.Id()) | ||
| } | ||
|
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| return resourceAwsCloudWatchEventRuleRead(d, meta) | ||
| } | ||
|
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| func resourceAwsCloudWatchEventRuleDelete(d *schema.ResourceData, meta interface{}) error { | ||
| conn := meta.(*AWSClient).cloudwatcheventsconn | ||
|
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| log.Printf("[INFO] Deleting CloudWatch Event Rule: %s", d.Id()) | ||
| _, err := conn.DeleteRule(&events.DeleteRuleInput{ | ||
| Name: aws.String(d.Id()), | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("Error deleting CloudWatch Event Rule: %s", err) | ||
| } | ||
| log.Println("[INFO] CloudWatch Event Rule deleted") | ||
|
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| d.SetId("") | ||
|
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| return nil | ||
| } | ||
|
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| func buildPutRuleInputStruct(d *schema.ResourceData) *events.PutRuleInput { | ||
| input := events.PutRuleInput{ | ||
| Name: aws.String(d.Get("name").(string)), | ||
| } | ||
| if v, ok := d.GetOk("description"); ok { | ||
| input.Description = aws.String(v.(string)) | ||
| } | ||
| if v, ok := d.GetOk("event_pattern"); ok { | ||
| input.EventPattern = aws.String(v.(string)) | ||
| } | ||
| if v, ok := d.GetOk("role_arn"); ok { | ||
| input.RoleArn = aws.String(v.(string)) | ||
| } | ||
| if v, ok := d.GetOk("schedule_expression"); ok { | ||
| input.ScheduleExpression = aws.String(v.(string)) | ||
| } | ||
|
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| input.State = aws.String(getStringStateFromBoolean(d.Get("is_enabled").(bool))) | ||
|
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| return &input | ||
| } | ||
|
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| // State is represented as (ENABLED|DISABLED) in the API | ||
| func getBooleanStateFromString(state string) (bool, error) { | ||
| if state == "ENABLED" { | ||
|
There was a problem hiding this comment. are we positive we will always get back uppercase? There was a problem hiding this comment. Well, it is documented like that in AWS docs: http://docs.aws.amazon.com/AmazonCloudWatchEvents/latest/APIReference/API_PutRule.html#API_PutRule_RequestSyntax but I agree that trusting the docs may not always be good idea and tracking down such bug here might not be easy with this I will add error reporting for unexpected values. |
||
| return true, nil | ||
| } else if state == "DISABLED" { | ||
| return false, nil | ||
| } | ||
| // We don't just blindly trust AWS as they tend to return | ||
| // unexpected values in similar cases (different casing etc.) | ||
| return false, fmt.Errorf("Failed converting state %q into boolean", state) | ||
| } | ||
|
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| // State is represented as (ENABLED|DISABLED) in the API | ||
| func getStringStateFromBoolean(isEnabled bool) string { | ||
| if isEnabled { | ||
| return "ENABLED" | ||
| } | ||
| return "DISABLED" | ||
| } | ||
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Love this little helper! This will be able to be used elsewhere :)