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/* | ||
Copyright 2016 The Kubernetes Authors All rights reserved. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package main | ||
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import ( | ||
"github.com/golang/glog" | ||
"github.com/prometheus/client_golang/prometheus" | ||
"golang.org/x/net/context" | ||
"k8s.io/client-go/kubernetes" | ||
"k8s.io/client-go/pkg/api" | ||
"k8s.io/client-go/pkg/apis/extensions/v1beta1" | ||
"k8s.io/client-go/tools/cache" | ||
) | ||
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var ( | ||
descReplicaSetStatusReplicas = prometheus.NewDesc( | ||
"kube_replicaset_status_replicas", | ||
"The number of replicas per ReplicaSet.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
descReplicaSetStatusFullyLabeledReplicas = prometheus.NewDesc( | ||
"kube_replicaset_status_fully_labeled_replicas", | ||
"The number of fully labeled replicas per ReplicaSet.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
descReplicaSetStatusReadyReplicas = prometheus.NewDesc( | ||
"kube_replicaset_status_ready_replicas", | ||
"The number of ready replicas per ReplicaSet.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
descReplicaSetStatusObservedGeneration = prometheus.NewDesc( | ||
"kube_replicaset_status_observed_generation", | ||
"The generation observed by the ReplicaSet controller.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
descReplicaSetSpecReplicas = prometheus.NewDesc( | ||
"kube_replicaset_spec_replicas", | ||
"Number of desired pods for a ReplicaSet.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
descReplicaSetMetadataGeneration = prometheus.NewDesc( | ||
"kube_replicaset_metadata_generation", | ||
"Sequence number representing a specific generation of the desired state.", | ||
[]string{"namespace", "replicaset"}, nil, | ||
) | ||
) | ||
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type ReplicaSetLister func() ([]v1beta1.ReplicaSet, error) | ||
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func (l ReplicaSetLister) List() ([]v1beta1.ReplicaSet, error) { | ||
return l() | ||
} | ||
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func RegisterReplicaSetCollector(registry prometheus.Registerer, kubeClient kubernetes.Interface) { | ||
client := kubeClient.Extensions().RESTClient() | ||
rslw := cache.NewListWatchFromClient(client, "replicasets", api.NamespaceAll, nil) | ||
rsinf := cache.NewSharedInformer(rslw, &v1beta1.ReplicaSet{}, resyncPeriod) | ||
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replicaSetLister := ReplicaSetLister(func() (replicasets []v1beta1.ReplicaSet, err error) { | ||
for _, c := range rsinf.GetStore().List() { | ||
replicasets = append(replicasets, *(c.(*v1beta1.ReplicaSet))) | ||
} | ||
return replicasets, nil | ||
}) | ||
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registry.MustRegister(&replicasetCollector{store: replicaSetLister}) | ||
go rsinf.Run(context.Background().Done()) | ||
} | ||
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type replicasetStore interface { | ||
List() (replicasets []v1beta1.ReplicaSet, err error) | ||
} | ||
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// replicasetCollector collects metrics about all replicasets in the cluster. | ||
type replicasetCollector struct { | ||
store replicasetStore | ||
} | ||
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// Describe implements the prometheus.Collector interface. | ||
func (dc *replicasetCollector) Describe(ch chan<- *prometheus.Desc) { | ||
ch <- descReplicaSetStatusReplicas | ||
ch <- descReplicaSetStatusFullyLabeledReplicas | ||
ch <- descReplicaSetStatusReadyReplicas | ||
ch <- descReplicaSetStatusObservedGeneration | ||
ch <- descReplicaSetSpecReplicas | ||
ch <- descReplicaSetMetadataGeneration | ||
} | ||
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// Collect implements the prometheus.Collector interface. | ||
func (dc *replicasetCollector) Collect(ch chan<- prometheus.Metric) { | ||
dpls, err := dc.store.List() | ||
if err != nil { | ||
glog.Errorf("listing replicasets failed: %s", err) | ||
return | ||
} | ||
for _, d := range dpls { | ||
dc.collectReplicaSet(ch, d) | ||
} | ||
} | ||
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func (dc *replicasetCollector) collectReplicaSet(ch chan<- prometheus.Metric, d v1beta1.ReplicaSet) { | ||
addGauge := func(desc *prometheus.Desc, v float64, lv ...string) { | ||
lv = append([]string{d.Namespace, d.Name}, lv...) | ||
ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, v, lv...) | ||
} | ||
addGauge(descReplicaSetStatusReplicas, float64(d.Status.Replicas)) | ||
addGauge(descReplicaSetStatusFullyLabeledReplicas, float64(d.Status.FullyLabeledReplicas)) | ||
addGauge(descReplicaSetStatusReadyReplicas, float64(d.Status.ReadyReplicas)) | ||
addGauge(descReplicaSetStatusObservedGeneration, float64(d.Status.ObservedGeneration)) | ||
addGauge(descReplicaSetSpecReplicas, float64(*d.Spec.Replicas)) | ||
addGauge(descReplicaSetMetadataGeneration, float64(d.ObjectMeta.Generation)) | ||
} |
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@@ -0,0 +1,120 @@ | ||
/* | ||
Copyright 2016 The Kubernetes Authors All rights reserved. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package main | ||
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import ( | ||
"testing" | ||
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"k8s.io/client-go/pkg/api/v1" | ||
"k8s.io/client-go/pkg/apis/extensions/v1beta1" | ||
) | ||
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var ( | ||
rs1Replicas int32 = 5 | ||
rs2Replicas int32 = 0 | ||
) | ||
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type mockReplicaSetStore struct { | ||
f func() ([]v1beta1.ReplicaSet, error) | ||
} | ||
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func (rs mockReplicaSetStore) List() (replicasets []v1beta1.ReplicaSet, err error) { | ||
return rs.f() | ||
} | ||
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func TestReplicaSetCollector(t *testing.T) { | ||
// Fixed metadata on type and help text. We prepend this to every expected | ||
// output so we only have to modify a single place when doing adjustments. | ||
const metadata = ` | ||
# HELP kube_replicaset_metadata_generation Sequence number representing a specific generation of the desired state. | ||
# TYPE kube_replicaset_metadata_generation gauge | ||
# HELP kube_replicaset_status_replicas The number of replicas per ReplicaSet. | ||
# TYPE kube_replicaset_status_replicas gauge | ||
# HELP kube_replicaset_status_fully_labeled_replicas The number of fully labeled replicas per ReplicaSet. | ||
# TYPE kube_replicaset_status_fully_labeled_replicas gauge | ||
# HELP kube_replicaset_status_ready_replicas The number of ready replicas per ReplicaSet. | ||
# TYPE kube_replicaset_status_ready_replicas gauge | ||
# HELP kube_replicaset_status_observed_generation The generation observed by the ReplicaSet controller. | ||
# TYPE kube_replicaset_status_observed_generation gauge | ||
# HELP kube_replicaset_spec_replicas Number of desired pods for a ReplicaSet. | ||
# TYPE kube_replicaset_spec_replicas gauge | ||
` | ||
cases := []struct { | ||
rss []v1beta1.ReplicaSet | ||
want string | ||
}{ | ||
{ | ||
rss: []v1beta1.ReplicaSet{ | ||
{ | ||
ObjectMeta: v1.ObjectMeta{ | ||
Name: "rs1", | ||
Namespace: "ns1", | ||
Generation: 21, | ||
}, | ||
Status: v1beta1.ReplicaSetStatus{ | ||
Replicas: 5, | ||
FullyLabeledReplicas: 10, | ||
ReadyReplicas: 5, | ||
ObservedGeneration: 1, | ||
}, | ||
Spec: v1beta1.ReplicaSetSpec{ | ||
Replicas: &rs1Replicas, | ||
}, | ||
}, { | ||
ObjectMeta: v1.ObjectMeta{ | ||
Name: "rs2", | ||
Namespace: "ns2", | ||
Generation: 14, | ||
}, | ||
Status: v1beta1.ReplicaSetStatus{ | ||
Replicas: 0, | ||
FullyLabeledReplicas: 5, | ||
ReadyReplicas: 0, | ||
ObservedGeneration: 5, | ||
}, | ||
Spec: v1beta1.ReplicaSetSpec{ | ||
Replicas: &rs2Replicas, | ||
}, | ||
}, | ||
}, | ||
want: metadata + ` | ||
kube_replicaset_metadata_generation{namespace="ns1",replicaset="rs1"} 21 | ||
kube_replicaset_metadata_generation{namespace="ns2",replicaset="rs2"} 14 | ||
kube_replicaset_status_replicas{namespace="ns1",replicaset="rs1"} 5 | ||
kube_replicaset_status_replicas{namespace="ns2",replicaset="rs2"} 0 | ||
kube_replicaset_status_observed_generation{namespace="ns1",replicaset="rs1"} 1 | ||
kube_replicaset_status_observed_generation{namespace="ns2",replicaset="rs2"} 5 | ||
kube_replicaset_status_fully_labeled_replicas{namespace="ns1",replicaset="rs1"} 10 | ||
kube_replicaset_status_fully_labeled_replicas{namespace="ns2",replicaset="rs2"} 5 | ||
kube_replicaset_status_ready_replicas{namespace="ns1",replicaset="rs1"} 5 | ||
kube_replicaset_status_ready_replicas{namespace="ns2",replicaset="rs2"} 0 | ||
kube_replicaset_spec_replicas{namespace="ns1",replicaset="rs1"} 5 | ||
kube_replicaset_spec_replicas{namespace="ns2",replicaset="rs2"} 0 | ||
`, | ||
}, | ||
} | ||
for _, c := range cases { | ||
dc := &replicasetCollector{ | ||
store: mockReplicaSetStore{ | ||
f: func() ([]v1beta1.ReplicaSet, error) { return c.rss, nil }, | ||
}, | ||
} | ||
if err := gatherAndCompare(dc, c.want, nil); err != nil { | ||
t.Errorf("unexpected collecting result:\n%s", err) | ||
} | ||
} | ||
} |