provider/aws: Add support for CloudWatch Log Metric Filter

builtin/providers/aws/provider.go

@@ -133,6 +133,7 @@ func Provider() terraform.ResourceProvider {
 			"aws_cloudwatch_event_rule":                    resourceAwsCloudWatchEventRule(),
 			"aws_cloudwatch_event_target":                  resourceAwsCloudWatchEventTarget(),
 			"aws_cloudwatch_log_group":                     resourceAwsCloudWatchLogGroup(),
+			"aws_cloudwatch_log_metric_filter":             resourceAwsCloudWatchLogMetricFilter(),
 			"aws_autoscaling_lifecycle_hook":               resourceAwsAutoscalingLifecycleHook(),
 			"aws_cloudwatch_metric_alarm":                  resourceAwsCloudWatchMetricAlarm(),
 			"aws_codedeploy_app":                           resourceAwsCodeDeployApp(),

builtin/providers/aws/resource_aws_cloudwatch_log_group.go

@@ -19,9 +19,10 @@ func resourceAwsCloudWatchLogGroup() *schema.Resource {
 
 		Schema: map[string]*schema.Schema{
 			"name": &schema.Schema{
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validateLogGroupName,
 			},
 
 			"retention_in_days": &schema.Schema{

builtin/providers/aws/resource_aws_cloudwatch_log_metric_filter.go

@@ -0,0 +1,187 @@
+package aws
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/helper/schema"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
+)
+
+func resourceAwsCloudWatchLogMetricFilter() *schema.Resource {
+	return &schema.Resource{
+		Create: resourceAwsCloudWatchLogMetricFilterUpdate,
+		Read:   resourceAwsCloudWatchLogMetricFilterRead,
+		Update: resourceAwsCloudWatchLogMetricFilterUpdate,
+		Delete: resourceAwsCloudWatchLogMetricFilterDelete,
+
+		Schema: map[string]*schema.Schema{
+			"name": &schema.Schema{
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validateLogMetricFilterName,
+			},
+
+			"pattern": &schema.Schema{
+				Type:         schema.TypeString,
+				Required:     true,
+				ValidateFunc: validateMaxLength(512),
+				StateFunc: func(v interface{}) string {
+					s, ok := v.(string)
+					if !ok {
+						return ""
+					}
+					return strings.TrimSpace(s)
+				},
+			},
+
+			"log_group_name": &schema.Schema{
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validateLogGroupName,
+			},
+
+			"metric_transformation": &schema.Schema{
+				Type:     schema.TypeList,
+				Required: true,
+				MaxItems: 1,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"name": &schema.Schema{
+							Type:         schema.TypeString,
+							Required:     true,
+							ValidateFunc: validateLogMetricFilterTransformationName,
+						},
+						"namespace": &schema.Schema{
+							Type:         schema.TypeString,
+							Required:     true,
+							ValidateFunc: validateLogMetricFilterTransformationName,
+						},
+						"value": &schema.Schema{
+							Type:         schema.TypeString,
+							Required:     true,
+							ValidateFunc: validateMaxLength(100),
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func resourceAwsCloudWatchLogMetricFilterUpdate(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).cloudwatchlogsconn
+
+	input := cloudwatchlogs.PutMetricFilterInput{
+		FilterName:    aws.String(d.Get("name").(string)),
+		FilterPattern: aws.String(strings.TrimSpace(d.Get("pattern").(string))),
+		LogGroupName:  aws.String(d.Get("log_group_name").(string)),
+	}
+
+	transformations := d.Get("metric_transformation").([]interface{})
+	o := transformations[0].(map[string]interface{})
+	input.MetricTransformations = expandCloudWachLogMetricTransformations(o)
+
+	log.Printf("[DEBUG] Creating/Updating CloudWatch Log Metric Filter: %s", input)
+	_, err := conn.PutMetricFilter(&input)
+	if err != nil {
+		return fmt.Errorf("Creating/Updating CloudWatch Log Metric Filter failed: %s", err)
+	}
+
+	d.SetId(d.Get("name").(string))
+
+	log.Println("[INFO] CloudWatch Log Metric Filter created/updated")
+
+	return resourceAwsCloudWatchLogMetricFilterRead(d, meta)
+}
+
+func resourceAwsCloudWatchLogMetricFilterRead(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).cloudwatchlogsconn
+
+	mf, err := lookupCloudWatchLogMetricFilter(conn, d.Get("name").(string),
+		d.Get("log_group_name").(string), nil)
+	if err != nil {
+		if _, ok := err.(*resource.NotFoundError); ok {
+			log.Printf("[WARN] Removing CloudWatch Log Metric Filter as it is gone")
+			d.SetId("")
+			return nil
+		}
+
+		return fmt.Errorf("Failed reading CloudWatch Log Metric Filter: %s", err)
+	}
+
+	log.Printf("[DEBUG] Found CloudWatch Log Metric Filter: %s", mf)
+
+	d.Set("name", mf.FilterName)
+	d.Set("pattern", mf.FilterPattern)
+	d.Set("metric_transformation", flattenCloudWachLogMetricTransformations(mf.MetricTransformations))
+
+	return nil
+}
+
+func lookupCloudWatchLogMetricFilter(conn *cloudwatchlogs.CloudWatchLogs,
+	name, logGroupName string, nextToken *string) (*cloudwatchlogs.MetricFilter, error) {
+
+	input := cloudwatchlogs.DescribeMetricFiltersInput{
+		FilterNamePrefix: aws.String(name),
+		LogGroupName:     aws.String(logGroupName),
+		NextToken:        nextToken,
+	}
+	log.Printf("[DEBUG] Reading CloudWatch Log Metric Filter: %s", input)
+	resp, err := conn.DescribeMetricFilters(&input)
+	if err != nil {
+		if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "ResourceNotFoundException" {
+			return nil, &resource.NotFoundError{
+				Message: fmt.Sprintf("CloudWatch Log Metric Filter %q / %q not found via"+
+					" initial DescribeMetricFilters call", name, logGroupName),
+				LastError:   err,
+				LastRequest: input,
+			}
+		}
+
+		return nil, fmt.Errorf("Failed describing CloudWatch Log Metric Filter: %s", err)
+	}
+
+	for _, mf := range resp.MetricFilters {
+		if *mf.FilterName == name {
+			return mf, nil
+		}
+	}
+
+	if resp.NextToken != nil {
+		return lookupCloudWatchLogMetricFilter(conn, name, logGroupName, resp.NextToken)
+	}
+
+	return nil, &resource.NotFoundError{
+		Message: fmt.Sprintf("CloudWatch Log Metric Filter %q / %q not found "+
+			"in given results from DescribeMetricFilters", name, logGroupName),
+		LastResponse: resp,
+		LastRequest:  input,
+	}
+}
+
+func resourceAwsCloudWatchLogMetricFilterDelete(d *schema.ResourceData, meta interface{}) error {
+	conn := meta.(*AWSClient).cloudwatchlogsconn
+
+	input := cloudwatchlogs.DeleteMetricFilterInput{
+		FilterName:   aws.String(d.Get("name").(string)),
+		LogGroupName: aws.String(d.Get("log_group_name").(string)),
+	}
+	log.Printf("[INFO] Deleting CloudWatch Log Metric Filter: %s", d.Id())
+	_, err := conn.DeleteMetricFilter(&input)
+	if err != nil {
+		return fmt.Errorf("Error deleting CloudWatch Log Metric Filter: %s", err)
+	}
+	log.Println("[INFO] CloudWatch Log Metric Filter deleted")
+
+	d.SetId("")
+
+	return nil
+}

builtin/providers/aws/resource_aws_cloudwatch_log_metric_filter_test.go

@@ -0,0 +1,185 @@
+package aws
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func TestAccAWSCloudWatchLogMetricFilter_basic(t *testing.T) {
+	var mf cloudwatchlogs.MetricFilter
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckAWSCloudWatchLogMetricFilterDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccAWSCloudWatchLogMetricFilterConfig,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckCloudWatchLogMetricFilterExists("aws_cloudwatch_log_metric_filter.foobar", &mf),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "name", "MyAppAccessCount"),
+					testAccCheckCloudWatchLogMetricFilterName(&mf, "MyAppAccessCount"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "pattern", ""),
+					testAccCheckCloudWatchLogMetricFilterPattern(&mf, ""),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "log_group_name", "MyApp/access.log"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.name", "EventCount"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.namespace", "YourNamespace"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.value", "1"),
+					testAccCheckCloudWatchLogMetricFilterTransformation(&mf, &cloudwatchlogs.MetricTransformation{
+						MetricName:      aws.String("EventCount"),
+						MetricNamespace: aws.String("YourNamespace"),
+						MetricValue:     aws.String("1"),
+					}),
+				),
+			},
+			resource.TestStep{
+				Config: testAccAWSCloudWatchLogMetricFilterConfigModified,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckCloudWatchLogMetricFilterExists("aws_cloudwatch_log_metric_filter.foobar", &mf),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "name", "MyAppAccessCount"),
+					testAccCheckCloudWatchLogMetricFilterName(&mf, "MyAppAccessCount"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "pattern", "{ $.errorCode = \"AccessDenied\" }"),
+					testAccCheckCloudWatchLogMetricFilterPattern(&mf, "{ $.errorCode = \"AccessDenied\" }"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "log_group_name", "MyApp/access.log"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.name", "AccessDeniedCount"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.namespace", "MyNamespace"),
+					resource.TestCheckResourceAttr("aws_cloudwatch_log_metric_filter.foobar", "metric_transformation.0.value", "2"),
+					testAccCheckCloudWatchLogMetricFilterTransformation(&mf, &cloudwatchlogs.MetricTransformation{
+						MetricName:      aws.String("AccessDeniedCount"),
+						MetricNamespace: aws.String("MyNamespace"),
+						MetricValue:     aws.String("2"),
+					}),
+				),
+			},
+		},
+	})
+}
+
+func testAccCheckCloudWatchLogMetricFilterName(mf *cloudwatchlogs.MetricFilter, name string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		if name != *mf.FilterName {
+			return fmt.Errorf("Expected filter name: %q, given: %q", name, *mf.FilterName)
+		}
+		return nil
+	}
+}
+
+func testAccCheckCloudWatchLogMetricFilterPattern(mf *cloudwatchlogs.MetricFilter, pattern string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		if mf.FilterPattern == nil {
+			if pattern != "" {
+				return fmt.Errorf("Received empty filter pattern, expected: %q", pattern)
+			}
+			return nil
+		}
+
+		if pattern != *mf.FilterPattern {
+			return fmt.Errorf("Expected filter pattern: %q, given: %q", pattern, *mf.FilterPattern)
+		}
+		return nil
+	}
+}
+
+func testAccCheckCloudWatchLogMetricFilterTransformation(mf *cloudwatchlogs.MetricFilter,
+	t *cloudwatchlogs.MetricTransformation) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		given := mf.MetricTransformations[0]
+		expected := t
+
+		if *given.MetricName != *expected.MetricName {
+			return fmt.Errorf("Expected metric name: %q, received: %q",
+				*expected.MetricName, *given.MetricName)
+		}
+
+		if *given.MetricNamespace != *expected.MetricNamespace {
+			return fmt.Errorf("Expected metric namespace: %q, received: %q",
+				*expected.MetricNamespace, *given.MetricNamespace)
+		}
+
+		if *given.MetricValue != *expected.MetricValue {
+			return fmt.Errorf("Expected metric value: %q, received: %q",
+				*expected.MetricValue, *given.MetricValue)
+		}
+
+		return nil
+	}
+}
+
+func testAccCheckCloudWatchLogMetricFilterExists(n string, mf *cloudwatchlogs.MetricFilter) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		rs, ok := s.RootModule().Resources[n]
+		if !ok {
+			return fmt.Errorf("Not found: %s", n)
+		}
+
+		conn := testAccProvider.Meta().(*AWSClient).cloudwatchlogsconn
+		metricFilter, err := lookupCloudWatchLogMetricFilter(conn, rs.Primary.ID, rs.Primary.Attributes["log_group_name"], nil)
+		if err != nil {
+			return err
+		}
+
+		*mf = *metricFilter
+
+		return nil
+	}
+}
+
+func testAccCheckAWSCloudWatchLogMetricFilterDestroy(s *terraform.State) error {
+	conn := testAccProvider.Meta().(*AWSClient).cloudwatchlogsconn
+
+	for _, rs := range s.RootModule().Resources {
+		if rs.Type != "aws_cloudwatch_log_metric_filter" {
+			continue
+		}
+
+		_, err := lookupCloudWatchLogMetricFilter(conn, rs.Primary.ID, rs.Primary.Attributes["log_group_name"], nil)
+		if err == nil {
+			return fmt.Errorf("MetricFilter Still Exists: %s", rs.Primary.ID)
+		}
+	}
+
+	return nil
+}
+
+var testAccAWSCloudWatchLogMetricFilterConfig = `
+resource "aws_cloudwatch_log_metric_filter" "foobar" {
+  name = "MyAppAccessCount"
+  pattern = ""
+  log_group_name = "${aws_cloudwatch_log_group.dada.name}"
+
+  metric_transformation {
+  	name = "EventCount"
+  	namespace = "YourNamespace"
+  	value = "1"
+  }
+}
+
+resource "aws_cloudwatch_log_group" "dada" {
+	name = "MyApp/access.log"
+}
+`
+
+var testAccAWSCloudWatchLogMetricFilterConfigModified = `
+resource "aws_cloudwatch_log_metric_filter" "foobar" {
+  name = "MyAppAccessCount"
+  pattern = <<PATTERN
+{ $.errorCode = "AccessDenied" }
+PATTERN
+  log_group_name = "${aws_cloudwatch_log_group.dada.name}"
+
+  metric_transformation {
+  	name = "AccessDeniedCount"
+  	namespace = "MyNamespace"
+  	value = "2"
+  }
+}
+
+resource "aws_cloudwatch_log_group" "dada" {
+	name = "MyApp/access.log"
+}
+`