[Metricbeat] gcp: add gke metricset documentation

metricbeat/docs/modules/gcp.asciidoc

@@ -149,7 +149,7 @@ For example, if Compute Metricset fetches 14 metrics (which is the number of met
 
 [float]
 == Metricsets
-Currently, we have `billing`, `compute`, `loadbalancing`, `pubsub`, `metrics` and
+Currently, we have `billing`, `compute`,  `gke`, `loadbalancing`, `pubsub`, `metrics` and
 `storage` metricset in `gcp` module.
 
 [float]
@@ -176,6 +176,15 @@ The `compute` metricset comes with a predefined dashboard:
 
 image::./images/metricbeat-gcp-compute-overview.png[]
 
+[float]
+=== `gke`
+
+This metricset fetches metrics for https://cloud.google.com/kubernetes-engine[Kubernetes Engine].
+
+The `gke` metricset contains all GA metrics exported by https://cloud.google.com/monitoring/api/metrics_kubernetes[Cloud Monitoring Kubernetes metrics].
+
+Extra labels and metadata are also extracted using the https://cloud.google.com/compute/docs/reference/rest/v1/instances/get[Compute API].
+
 [float]
 === `loadbalancing`
 This metricset fetches metrics from https://cloud.google.com/load-balancing/[Load Balancing]
@@ -295,7 +304,7 @@ metricbeat.modules:
   period: 1m
   metrics:
     - aligner: ALIGN_NONE
-      service: kubernetes
+      service: gke
       service_metric_prefix: kubernetes.io/
       metric_types:
         - "container/cpu/core_usage_time"
@@ -320,6 +329,8 @@ The following metricsets are available:
 
 * <<metricbeat-metricset-gcp-compute,compute>>
 
+* <<metricbeat-metricset-gcp-gke,gke>>
+
 * <<metricbeat-metricset-gcp-loadbalancing,loadbalancing>>
 
 * <<metricbeat-metricset-gcp-metrics,metrics>>
@@ -332,6 +343,8 @@ include::gcp/billing.asciidoc[]
 
 include::gcp/compute.asciidoc[]
 
+include::gcp/gke.asciidoc[]
+
 include::gcp/loadbalancing.asciidoc[]
 
 include::gcp/metrics.asciidoc[]

metricbeat/docs/modules/gcp/gke.asciidoc

@@ -0,0 +1,19 @@
+////
+This file is generated! See scripts/mage/docs_collector.go
+////
+
+[[metricbeat-metricset-gcp-gke]]
+[role="xpack"]
+=== Google Cloud Platform gke metricset
+
+beta[]
+
+include::../../../../x-pack/metricbeat/module/gcp/gke/_meta/docs.asciidoc[]
+
+This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.
+
+==== Fields
+
+For a description of each field in the metricset, see the
+<<exported-fields-gcp,exported fields>> section.
+

metricbeat/docs/modules_list.asciidoc

@@ -115,8 +115,9 @@ This file is generated! See scripts/mage/docs_collector.go
 |<<metricbeat-metricset-etcd-self,self>>   
 |<<metricbeat-metricset-etcd-store,store>>   
 |<<metricbeat-module-gcp,Google Cloud Platform>>  beta[]   |image:./images/icon-yes.png[Prebuilt dashboards are available]    |  
-.6+| .6+|  |<<metricbeat-metricset-gcp-billing,billing>> beta[]  
+.7+| .7+|  |<<metricbeat-metricset-gcp-billing,billing>> beta[]  
 |<<metricbeat-metricset-gcp-compute,compute>> beta[]  
+|<<metricbeat-metricset-gcp-gke,gke>> beta[]  
 |<<metricbeat-metricset-gcp-loadbalancing,loadbalancing>> beta[]  
 |<<metricbeat-metricset-gcp-metrics,metrics>> beta[]  
 |<<metricbeat-metricset-gcp-pubsub,pubsub>> beta[]  

x-pack/metricbeat/metricbeat.reference.yml

@@ -578,7 +578,7 @@ metricbeat.modules:
   period: 1m
   metrics:
     - aligner: ALIGN_NONE
-      service: kubernetes
+      service: gke
       service_metric_prefix: kubernetes.io/
       metric_types:
         - "container/cpu/core_usage_time"

x-pack/metricbeat/module/gcp/_meta/config.yml

@@ -50,7 +50,7 @@
   period: 1m
   metrics:
     - aligner: ALIGN_NONE
-      service: kubernetes
+      service: gke
       service_metric_prefix: kubernetes.io/
       metric_types:
         - "container/cpu/core_usage_time"

x-pack/metricbeat/module/gcp/_meta/docs.asciidoc

@@ -139,7 +139,7 @@ For example, if Compute Metricset fetches 14 metrics (which is the number of met
 
 [float]
 == Metricsets
-Currently, we have `billing`, `compute`, `loadbalancing`, `pubsub`, `metrics` and
+Currently, we have `billing`, `compute`,  `gke`, `loadbalancing`, `pubsub`, `metrics` and
 `storage` metricset in `gcp` module.
 
 [float]
@@ -166,6 +166,15 @@ The `compute` metricset comes with a predefined dashboard:
 
 image::./images/metricbeat-gcp-compute-overview.png[]
 
+[float]
+=== `gke`
+
+This metricset fetches metrics for https://cloud.google.com/kubernetes-engine[Kubernetes Engine].
+
+The `gke` metricset contains all GA metrics exported by https://cloud.google.com/monitoring/api/metrics_kubernetes[Cloud Monitoring Kubernetes metrics].
+
+Extra labels and metadata are also extracted using the https://cloud.google.com/compute/docs/reference/rest/v1/instances/get[Compute API].
+
 [float]
 === `loadbalancing`
 This metricset fetches metrics from https://cloud.google.com/load-balancing/[Load Balancing]

x-pack/metricbeat/module/gcp/gke/_meta/docs.asciidoc

@@ -0,0 +1,28 @@
+`gke` metricset is designed for collecting metrics from https://cloud.google.com/kubernetes-engine[Google Kubernetes
+Engine].
+Google Cloud Monitoring supports Google Kubernetes Engine metrics, as listed in
+https://cloud.google.com/monitoring/api/metrics_kubernetes[Google Cloud Monitoring Kubernetes metrics].
+
+This metricset collects all GA Kubernetes metrics from Google Cloud Monitoring
+APIs. It leverages under the hood the `metrics` metricset.
+
+We recommend users to define `period: 1m` for this metricset because in Google
+Cloud, GKE monitoring metrics are sampled every 60 seconds.
+Some of the metrics have an ingest delay up to 240 seconds.
+
+[float]
+=== Metricset-specific configuration notes
+None
+
+[float]
+=== Configuration example
+[source,yaml]
+----
+- module: gcp
+  metricsets:
+    - gke
+  project_id: "your project id"
+  credentials_file_path: "your JSON credentials file path"
+  exclude_labels: false
+  period: 1m
+----

x-pack/metricbeat/module/gcp/metrics/_meta/docs.asciidoc

@@ -158,7 +158,7 @@ metric prefix, as for GKE metrics the required prefix is `kubernetes.io/`
   exclude_labels: false
   period: 1m
   metrics:
-    - service: kubernetes
+    - service: gke
       service_metric_prefix: kubernetes.io/
       metric_types:
         - "container/cpu/core_usage_time"

x-pack/metricbeat/modules.d/gcp.yml.disabled

@@ -53,7 +53,7 @@
   period: 1m
   metrics:
     - aligner: ALIGN_NONE
-      service: kubernetes
+      service: gke
       service_metric_prefix: kubernetes.io/
       metric_types:
         - "container/cpu/core_usage_time"