[#13215] Make metric_descriptor argument optional for google_logging_metric

.changelog/6937.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+logging: made `metric_descriptor` argument optional for `google_logging_metric`
+```

google/resource_logging_metric.go

@@ -47,57 +47,6 @@ func resourceLoggingMetric() *schema.Resource {
 				Description: `An advanced logs filter (https://cloud.google.com/logging/docs/view/advanced-filters) which
 is used to match log entries.`,
 			},
-			"metric_descriptor": {
-				Type:        schema.TypeList,
-				Required:    true,
-				Description: `The metric descriptor associated with the logs-based metric.`,
-				MaxItems:    1,
-				Elem: &schema.Resource{
-					Schema: map[string]*schema.Schema{
-						"metric_kind": {
-							Type:         schema.TypeString,
-							Required:     true,
-							ValidateFunc: validateEnum([]string{"DELTA", "GAUGE", "CUMULATIVE"}),
-							Description: `Whether the metric records instantaneous values, changes to a value, etc.
-Some combinations of metricKind and valueType might not be supported.
-For counter metrics, set this to DELTA. Possible values: ["DELTA", "GAUGE", "CUMULATIVE"]`,
-						},
-						"value_type": {
-							Type:         schema.TypeString,
-							Required:     true,
-							ValidateFunc: validateEnum([]string{"BOOL", "INT64", "DOUBLE", "STRING", "DISTRIBUTION", "MONEY"}),
-							Description: `Whether the measurement is an integer, a floating-point number, etc.
-Some combinations of metricKind and valueType might not be supported.
-For counter metrics, set this to INT64. Possible values: ["BOOL", "INT64", "DOUBLE", "STRING", "DISTRIBUTION", "MONEY"]`,
-						},
-						"display_name": {
-							Type:     schema.TypeString,
-							Optional: true,
-							Description: `A concise name for the metric, which can be displayed in user interfaces. Use sentence case 
-without an ending period, for example "Request count". This field is optional but it is 
-recommended to be set for any metrics associated with user-visible concepts, such as Quota.`,
-						},
-						"labels": {
-							Type:     schema.TypeSet,
-							Optional: true,
-							Description: `The set of labels that can be used to describe a specific instance of this metric type. For
-example, the appengine.googleapis.com/http/server/response_latencies metric type has a label
-for the HTTP response code, response_code, so you can look at latencies for successful responses
-or just for responses that failed.`,
-							Elem: loggingMetricMetricDescriptorLabelsSchema(),
-							// Default schema.HashSchema is used.
-						},
-						"unit": {
-							Type:     schema.TypeString,
-							Optional: true,
-							Description: `The unit in which the metric value is reported. It is only applicable if the valueType is
-'INT64', 'DOUBLE', or 'DISTRIBUTION'. The supported units are a subset of
-[The Unified Code for Units of Measure](http://unitsofmeasure.org/ucum.html) standard`,
-							Default: "1",
-						},
-					},
-				},
-			},
 			"name": {
 				Type:     schema.TypeString,
 				Required: true,
@@ -218,6 +167,61 @@ have an associated extractor expression in this map. The syntax of the extractor
 the same as for the valueExtractor field.`,
 				Elem: &schema.Schema{Type: schema.TypeString},
 			},
+			"metric_descriptor": {
+				Type:     schema.TypeList,
+				Computed: true,
+				Optional: true,
+				Description: `The optional metric descriptor associated with the logs-based metric.
+If unspecified, it uses a default metric descriptor with a DELTA metric kind,
+INT64 value type, with no labels and a unit of "1". Such a metric counts the
+number of log entries matching the filter expression.`,
+				MaxItems: 1,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"metric_kind": {
+							Type:         schema.TypeString,
+							Required:     true,
+							ValidateFunc: validateEnum([]string{"DELTA", "GAUGE", "CUMULATIVE"}),
+							Description: `Whether the metric records instantaneous values, changes to a value, etc.
+Some combinations of metricKind and valueType might not be supported.
+For counter metrics, set this to DELTA. Possible values: ["DELTA", "GAUGE", "CUMULATIVE"]`,
+						},
+						"value_type": {
+							Type:         schema.TypeString,
+							Required:     true,
+							ValidateFunc: validateEnum([]string{"BOOL", "INT64", "DOUBLE", "STRING", "DISTRIBUTION", "MONEY"}),
+							Description: `Whether the measurement is an integer, a floating-point number, etc.
+Some combinations of metricKind and valueType might not be supported.
+For counter metrics, set this to INT64. Possible values: ["BOOL", "INT64", "DOUBLE", "STRING", "DISTRIBUTION", "MONEY"]`,
+						},
+						"display_name": {
+							Type:     schema.TypeString,
+							Optional: true,
+							Description: `A concise name for the metric, which can be displayed in user interfaces. Use sentence case 
+without an ending period, for example "Request count". This field is optional but it is 
+recommended to be set for any metrics associated with user-visible concepts, such as Quota.`,
+						},
+						"labels": {
+							Type:     schema.TypeSet,
+							Optional: true,
+							Description: `The set of labels that can be used to describe a specific instance of this metric type. For
+example, the appengine.googleapis.com/http/server/response_latencies metric type has a label
+for the HTTP response code, response_code, so you can look at latencies for successful responses
+or just for responses that failed.`,
+							Elem: loggingMetricMetricDescriptorLabelsSchema(),
+							// Default schema.HashSchema is used.
+						},
+						"unit": {
+							Type:     schema.TypeString,
+							Optional: true,
+							Description: `The unit in which the metric value is reported. It is only applicable if the valueType is
+'INT64', 'DOUBLE', or 'DISTRIBUTION'. The supported units are a subset of
+[The Unified Code for Units of Measure](http://unitsofmeasure.org/ucum.html) standard`,
+							Default: "1",
+						},
+					},
+				},
+			},
 			"value_extractor": {
 				Type:     schema.TypeString,
 				Optional: true,

google/resource_logging_metric_generated_test.go

@@ -203,12 +203,6 @@ resource "google_logging_metric" "logging_metric" {
   name        = "tf-test-my-(custom)/metric%{random_suffix}"
   filter      = "resource.type=gae_app AND severity>=ERROR"
   bucket_name = google_logging_project_bucket_config.logging_metric.id
-
-  metric_descriptor {
-    metric_kind = "DELTA"
-    value_type  = "INT64"
-    unit        = "1"
-  }
 }
 `, context)
 }

google/resource_logging_metric_test.go

@@ -173,12 +173,6 @@ func testAccLoggingMetric_loggingBucketBase(suffix string, filter string) string
 resource "google_logging_metric" "logging_metric" {
   name        = "my-custom-metric-%s"
   filter      = "%s"
-
-  metric_descriptor {
-    metric_kind = "DELTA"
-    unit        = "1"
-    value_type  = "INT64"
-  }
 }
 `, suffix, filter)
 }
@@ -195,12 +189,6 @@ resource "google_logging_metric" "logging_metric" {
   name        = "my-custom-metric-%s"
   bucket_name = google_logging_project_bucket_config.logging_bucket.id
   filter      = "%s"
-
-  metric_descriptor {
-    metric_kind = "DELTA"
-    unit        = "1"
-    value_type  = "INT64"
-  }
 }
 `, project_id, suffix, filter)
 }

website/docs/r/logging_metric.html.markdown

@@ -132,12 +132,6 @@ resource "google_logging_metric" "logging_metric" {
   name        = "my-(custom)/metric"
   filter      = "resource.type=gae_app AND severity>=ERROR"
   bucket_name = google_logging_project_bucket_config.logging_metric.id
-
-  metric_descriptor {
-    metric_kind = "DELTA"
-    value_type  = "INT64"
-    unit        = "1"
-  }
 }
 ```
 
@@ -159,11 +153,54 @@ The following arguments are supported:
   An advanced logs filter (https://cloud.google.com/logging/docs/view/advanced-filters) which
   is used to match log entries.
 
+
+- - -
+
+
+* `description` -
+  (Optional)
+  A description of this metric, which is used in documentation. The maximum length of the
+  description is 8000 characters.
+
+* `bucket_name` -
+  (Optional)
+  The resource name of the Log Bucket that owns the Log Metric. Only Log Buckets in projects
+  are supported. The bucket has to be in the same project as the metric.
+
 * `metric_descriptor` -
-  (Required)
-  The metric descriptor associated with the logs-based metric.
+  (Optional)
+  The optional metric descriptor associated with the logs-based metric.
+  If unspecified, it uses a default metric descriptor with a DELTA metric kind,
+  INT64 value type, with no labels and a unit of "1". Such a metric counts the
+  number of log entries matching the filter expression.
   Structure is [documented below](#nested_metric_descriptor).
 
+* `label_extractors` -
+  (Optional)
+  A map from a label key string to an extractor expression which is used to extract data from a log
+  entry field and assign as the label value. Each label key specified in the LabelDescriptor must
+  have an associated extractor expression in this map. The syntax of the extractor expression is
+  the same as for the valueExtractor field.
+
+* `value_extractor` -
+  (Optional)
+  A valueExtractor is required when using a distribution logs-based metric to extract the values to
+  record from a log entry. Two functions are supported for value extraction - EXTRACT(field) or
+  REGEXP_EXTRACT(field, regex). The argument are 1. field - The name of the log entry field from which
+  the value is to be extracted. 2. regex - A regular expression using the Google RE2 syntax
+  (https://github.com/google/re2/wiki/Syntax) with a single capture group to extract data from the specified
+  log entry field. The value of the field is converted to a string before applying the regex. It is an
+  error to specify a regex that does not include exactly one capture group.
+
+* `bucket_options` -
+  (Optional)
+  The bucketOptions are required when the logs-based metric is using a DISTRIBUTION value type and it
+  describes the bucket boundaries used to create a histogram of the extracted values.
+  Structure is [documented below](#nested_bucket_options).
+
+* `project` - (Optional) The ID of the project in which the resource belongs.
+    If it is not provided, the provider project is used.
+
 
 <a name="nested_metric_descriptor"></a>The `metric_descriptor` block supports:
 
@@ -218,46 +255,6 @@ The following arguments are supported:
   Default value is `STRING`.
   Possible values are `BOOL`, `INT64`, and `STRING`.
 
-- - -
-
-
-* `description` -
-  (Optional)
-  A description of this metric, which is used in documentation. The maximum length of the
-  description is 8000 characters.
-
-* `bucket_name` -
-  (Optional)
-  The resource name of the Log Bucket that owns the Log Metric. Only Log Buckets in projects
-  are supported. The bucket has to be in the same project as the metric.
-
-* `label_extractors` -
-  (Optional)
-  A map from a label key string to an extractor expression which is used to extract data from a log
-  entry field and assign as the label value. Each label key specified in the LabelDescriptor must
-  have an associated extractor expression in this map. The syntax of the extractor expression is
-  the same as for the valueExtractor field.
-
-* `value_extractor` -
-  (Optional)
-  A valueExtractor is required when using a distribution logs-based metric to extract the values to
-  record from a log entry. Two functions are supported for value extraction - EXTRACT(field) or
-  REGEXP_EXTRACT(field, regex). The argument are 1. field - The name of the log entry field from which
-  the value is to be extracted. 2. regex - A regular expression using the Google RE2 syntax
-  (https://github.com/google/re2/wiki/Syntax) with a single capture group to extract data from the specified
-  log entry field. The value of the field is converted to a string before applying the regex. It is an
-  error to specify a regex that does not include exactly one capture group.
-
-* `bucket_options` -
-  (Optional)
-  The bucketOptions are required when the logs-based metric is using a DISTRIBUTION value type and it
-  describes the bucket boundaries used to create a histogram of the extracted values.
-  Structure is [documented below](#nested_bucket_options).
-
-* `project` - (Optional) The ID of the project in which the resource belongs.
-    If it is not provided, the provider project is used.
-
-
 <a name="nested_bucket_options"></a>The `bucket_options` block supports:
 
 * `linear_buckets` -