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Merge pull request #49 from aruniiird/add-monitoring-components
Adding monitoring capability to lvm-operator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| Copyright 2021. | ||
| 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. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "net" | ||
| "net/http" | ||
| "os" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/promauto" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| "sigs.k8s.io/controller-runtime/pkg/log/zap" | ||
| ) | ||
|
|
||
| var ( | ||
| exporterNamespace string | ||
| exporterAddress string | ||
| kubeconfigPath string | ||
| kubeAPIServerURL string | ||
| ) | ||
|
|
||
| type lvmCollector struct{} | ||
|
|
||
| func (lc *lvmCollector) Describe(c chan<- *prometheus.Desc) {} | ||
| func (lc *lvmCollector) Collect(c chan<- prometheus.Metric) {} | ||
|
|
||
| func main() { | ||
| lvmExpFlags := flag.NewFlagSet("lvm-metrics-exporter", flag.ExitOnError) | ||
| lvmExpFlags.StringVar(&exporterNamespace, "namespace", "lvm-exporter", | ||
| "set the namespace of the lvm metric exporter") | ||
| lvmExpFlags.StringVar(&exporterAddress, "address", ":23532", | ||
| "address on which the metrics exporter should run") | ||
| lvmExpFlags.StringVar(&kubeconfigPath, "kubeconfig", "", "Path to kubeconfig file") | ||
| lvmExpFlags.StringVar(&kubeAPIServerURL, "apiserver", "", "API server URL") | ||
|
|
||
| zapOptions := &zap.Options{} | ||
| zapOptions.BindFlags(lvmExpFlags) | ||
|
|
||
| _ = lvmExpFlags.Parse(os.Args[1:]) | ||
|
|
||
| zapOpts := zap.UseFlagOptions(zapOptions) | ||
| newLogger := zap.New(zapOpts).WithName("lvm-metric-exporter") | ||
| newLogger.Info("Commandline: ", "args", os.Args[1:]) | ||
| newLogger.Info("Exporter set values: ", "namespace", exporterNamespace, "address", exporterAddress) | ||
|
|
||
| prometheus.MustRegister(&lvmCollector{}) | ||
|
|
||
| // prometheus http handler | ||
| http.Handle("/metrics", promhttp.Handler()) | ||
| http.HandleFunc("/", func(rw http.ResponseWriter, r *http.Request) { | ||
| _, err := rw.Write([]byte(`<html> | ||
| <head><title>LVM Metric Exporter</title></head> | ||
| <body> | ||
| <h1>LVM Metric Exporter</h1> | ||
| <p><a href='/metrics'>Metrics</a></p> | ||
| </body> | ||
| </html>`)) | ||
| if err != nil { | ||
| newLogger.Error(err, "error while writing into http.ResponseWriter") | ||
| return | ||
| } | ||
| }) | ||
|
|
||
| // prometheus metrics | ||
| _ = promauto.NewGauge(prometheus.GaugeOpts{ | ||
| Name: "lvmoptest", | ||
| Help: "this is a test gauge metrics", | ||
| }) | ||
|
|
||
| // runtime loop | ||
| newLogger.Info("Starting lvm metric exporter at ", "address", exporterAddress) | ||
| ln, err := net.Listen("tcp", exporterAddress) | ||
| if err != nil { | ||
| newLogger.Error(err, "Error creating the listener") | ||
| } | ||
| err = http.Serve(ln, nil) | ||
| if err != nil { | ||
| newLogger.Error(err, "Error while serving requests") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| apiVersion: v1 | ||
| kind: Service | ||
| metadata: | ||
| name: lvm-node-metrics | ||
| namespace: system | ||
| labels: | ||
| app.kubernetes.io/compose: metrics | ||
| spec: | ||
| selector: | ||
| exporter: lvm-operator | ||
| ports: | ||
| - name: lvm-metrics | ||
| protocol: TCP | ||
| port: 23532 | ||
| targetPort: 23532 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| --- | ||
| kind: Role | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: lvm-metrics | ||
| namespace: system | ||
| rules: | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - services | ||
| - endpoints | ||
| - pods | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| --- | ||
| kind: RoleBinding | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: lvm-metrics | ||
| namespace: system | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: Role | ||
| name: lvm-metrics | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: prometheus-k8s | ||
| namespace: openshift-monitoring |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| apiVersion: v1 | ||
| kind: Service | ||
| metadata: | ||
| name: topolvm-node-metrics | ||
| namespace: system | ||
| labels: | ||
| app.kubernetes.io/compose: metrics | ||
| spec: | ||
| selector: | ||
| app: topolvm-node | ||
| ports: | ||
| - name: topolvm-metrics | ||
| protocol: TCP | ||
| port: 8080 | ||
| targetPort: 8080 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| --- | ||
| kind: Role | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: topolvm-metrics | ||
| namespace: system | ||
| rules: | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - services | ||
| - endpoints | ||
| - pods | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| --- | ||
| kind: RoleBinding | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: topolvm-metrics | ||
| namespace: system | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: Role | ||
| name: topolvm-metrics | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: prometheus-k8s | ||
| namespace: openshift-monitoring |
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