[metricbeat]kubernetes: add persistentvolumeclaim from kube-state-metrics

CHANGELOG.next.asciidoc

@@ -549,6 +549,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Enable script processor. {pull}14711[14711]
 - Enable wildcard for cloudwatch metricset namespace. {pull}14971[14971] {issue}14965[14965]
 - Add `kube-state-metrics` `state_service` metrics for kubernetes module. {pull}14794[14794]
+- Add `kube-state-metrics` `state_persistentvolumeclaim` metrics for kubernetes module. {pull}15066[15066]
 - Add usage metricset in aws modules. {pull}14925[14925] {issue}14935[14935]
 - Add billing metricset in aws modules. {pull}14801[14801] {issue}14934[14934]
 - Add AWS SNS metricset. {pull}14946[14946]

metricbeat/docs/fields.asciidoc

@@ -19296,6 +19296,67 @@ type: long
 
 --
 
+[float]
+=== persistentvolumeclaim
+
+kubernetes persistent volume clame metrics from kube-state-metrics
+
+
+
+*`kubernetes.persistentvolumeclaim.name`*::
++
+--
+PVC name.
+
+type: keyword
+
+--
+
+*`kubernetes.persistentvolumeclaim.volume_name`*::
++
+--
+Binded volume name.
+
+type: keyword
+
+--
+
+*`kubernetes.persistentvolumeclaim.request_storage.bytes`*::
++
+--
+Requested capacity.
+
+type: long
+
+--
+
+*`kubernetes.persistentvolumeclaim.phase`*::
++
+--
+PVC phase.
+
+type: keyword
+
+--
+
+*`kubernetes.persistentvolumeclaim.access_mode`*::
++
+--
+Access mode.
+
+type: keyword
+
+--
+
+*`kubernetes.persistentvolumeclaim.storage_class`*::
++
+--
+Storage class for the PVC.
+
+type: keyword
+
+--
+
 [float]
 === pod
 

metricbeat/docs/modules/kubernetes.asciidoc

@@ -96,6 +96,7 @@ metricbeat.modules:
     - state_cronjob
     - state_resourcequota
     - state_service
+    - state_persistentvolumeclaim
   period: 10s
   hosts: ["kube-state-metrics:8080"]
 
@@ -181,6 +182,8 @@ The following metricsets are available:
 
 * <<metricbeat-metricset-kubernetes-state_node,state_node>>
 
+* <<metricbeat-metricset-kubernetes-state_persistentvolumeclaim,state_persistentvolumeclaim>>
+
 * <<metricbeat-metricset-kubernetes-state_pod,state_pod>>
 
 * <<metricbeat-metricset-kubernetes-state_replicaset,state_replicaset>>
@@ -219,6 +222,8 @@ include::kubernetes/state_deployment.asciidoc[]
 
 include::kubernetes/state_node.asciidoc[]
 
+include::kubernetes/state_persistentvolumeclaim.asciidoc[]
+
 include::kubernetes/state_pod.asciidoc[]
 
 include::kubernetes/state_replicaset.asciidoc[]

metricbeat/docs/modules/kubernetes/state_persistentvolumeclaim.asciidoc

@@ -0,0 +1,17 @@
+////
+This file is generated! See scripts/mage/docs_collector.go
+////
+
+[[metricbeat-metricset-kubernetes-state_persistentvolumeclaim]]
+=== Kubernetes state_persistentvolumeclaim metricset
+
+experimental[]
+
+include::../../../module/kubernetes/state_persistentvolumeclaim/_meta/docs.asciidoc[]
+
+
+==== Fields
+
+For a description of each field in the metricset, see the
+<<exported-fields-kubernetes,exported fields>> section.
+

metricbeat/docs/modules_list.asciidoc

@@ -108,7 +108,7 @@ This file is generated! See scripts/mage/docs_collector.go
 .2+| .2+|  |<<metricbeat-metricset-kibana-stats,stats>>   
 |<<metricbeat-metricset-kibana-status,status>>   
 |<<metricbeat-module-kubernetes,Kubernetes>>     |image:./images/icon-yes.png[Prebuilt dashboards are available]    |  
-.19+| .19+|  |<<metricbeat-metricset-kubernetes-apiserver,apiserver>>   
+.20+| .20+|  |<<metricbeat-metricset-kubernetes-apiserver,apiserver>>   
 |<<metricbeat-metricset-kubernetes-container,container>>   
 |<<metricbeat-metricset-kubernetes-controllermanager,controllermanager>>   
 |<<metricbeat-metricset-kubernetes-event,event>>   
@@ -120,6 +120,7 @@ This file is generated! See scripts/mage/docs_collector.go
 |<<metricbeat-metricset-kubernetes-state_cronjob,state_cronjob>>   
 |<<metricbeat-metricset-kubernetes-state_deployment,state_deployment>>   
 |<<metricbeat-metricset-kubernetes-state_node,state_node>>   
+|<<metricbeat-metricset-kubernetes-state_persistentvolumeclaim,state_persistentvolumeclaim>> experimental[]  
 |<<metricbeat-metricset-kubernetes-state_pod,state_pod>>   
 |<<metricbeat-metricset-kubernetes-state_replicaset,state_replicaset>>   
 |<<metricbeat-metricset-kubernetes-state_resourcequota,state_resourcequota>>   

metricbeat/helper/prometheus/metric.go

@@ -385,3 +385,36 @@ type opUnixTimestampValue struct {
 func (o opUnixTimestampValue) Process(field string, value interface{}, labels common.MapStr) (string, interface{}, common.MapStr) {
 	return field, common.Time(time.Unix(int64(value.(float64)), 0)), labels
 }
+
+// OpLabelKeyPrefixRemover removes prefix from label keys
+func OpLabelKeyPrefixRemover(prefix string) MetricOption {
+	return opLabelKeyPrefixRemover{prefix}
+}
+
+// opLabelKeyPrefixRemover is a metric option processor that removes a prefix from the key of a label set
+type opLabelKeyPrefixRemover struct {
+	Prefix string
+}
+
+// Process modifies the labels map, removing a prefix when found at keys of the labels set.
+// For each label, if the key is found a new key will be created hosting the same value and the
+// old key will be deleted.
+// Fields, values and not prefixed labels will remain unmodified.
+func (o opLabelKeyPrefixRemover) Process(field string, value interface{}, labels common.MapStr) (string, interface{}, common.MapStr) {
+	renameKeys := []string{}
+	for k := range labels {
+		if len(k) < len(o.Prefix) {
+			continue
+		}
+		if k[:6] == o.Prefix {
+			renameKeys = append(renameKeys, k)
+		}
+	}
+
+	for i := range renameKeys {
+		v := labels[renameKeys[i]]
+		delete(labels, renameKeys[i])
+		labels[renameKeys[i][len(o.Prefix):]] = v
+	}
+	return "", value, labels
+}

metricbeat/metricbeat.reference.yml

@@ -475,6 +475,7 @@ metricbeat.modules:
     - state_cronjob
     - state_resourcequota
     - state_service
+    - state_persistentvolumeclaim
   period: 10s
   hosts: ["kube-state-metrics:8080"]
 

metricbeat/module/kubernetes/_meta/config.reference.yml

@@ -36,6 +36,7 @@
     - state_cronjob
     - state_resourcequota
     - state_service
+    - state_persistentvolumeclaim
   period: 10s
   hosts: ["kube-state-metrics:8080"]
 

metricbeat/module/kubernetes/_meta/config.yml

@@ -36,6 +36,7 @@
 #    - state_cronjob
 #    - state_resourcequota
 #    - state_service
+#    - state_persistentvolumeclaim
 #  period: 10s
 #  hosts: ["kube-state-metrics:8080"]
 #  add_metadata: true

metricbeat/module/kubernetes/state_persistentvolumeclaim/README.md

@@ -0,0 +1,15 @@
+# Kube-state-metrics/PersistentVolumeClaim
+
+This metricset connects to kube-state-metrics endpoint to retrieve and report Persistent Volume Claim metrics.
+
+## Version history
+
+- November 2019, first release using kube-state-metrics `v1.8.0`.
+
+## Configuration
+
+See the metricset documentation for the configuration reference.
+
+## Manual testing
+
+// TODO

metricbeat/module/kubernetes/state_persistentvolumeclaim/_meta/docs.asciidoc

@@ -0,0 +1,2 @@
+The `state_persistentvolumeclaim` metricset for kubernetes service related metrics from `kube-state-metrics`.
+