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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/appscode/go/runtime" | ||
| "github.com/appscode/pat" | ||
| tapi "github.com/k8sdb/apimachinery/api" | ||
| ese "github.com/k8sdb/elasticsearch_exporter/exporter" | ||
| pge "github.com/k8sdb/postgres_exporter/exporter" | ||
| "github.com/orcaman/concurrent-map" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| "github.com/prometheus/common/log" | ||
| "gopkg.in/ini.v1" | ||
| kerr "k8s.io/kubernetes/pkg/api/errors" | ||
| ) | ||
|
|
||
| const ( | ||
| ParamNamespace = ":namespace" | ||
| ParamType = ":type" | ||
| ParamName = ":name" | ||
| ParamPodIP = ":ip" | ||
| ) | ||
|
|
||
| var ( | ||
| registerers = cmap.New() // URL.path => *prometheus.Registry | ||
| ) | ||
|
|
||
| func DeleteRegistry(w http.ResponseWriter, r *http.Request) { | ||
| defer runtime.HandleCrash() | ||
|
|
||
| registerers.Remove(r.URL.Path) | ||
| w.WriteHeader(http.StatusOK) | ||
| } | ||
|
|
||
| func ExportMetrics(w http.ResponseWriter, r *http.Request) { | ||
| defer runtime.HandleCrash() | ||
|
|
||
| params, found := pat.FromContext(r.Context()) | ||
| if !found { | ||
| http.Error(w, "Missing parameters", http.StatusBadRequest) | ||
| return | ||
| } | ||
| namespace := params.Get(ParamNamespace) | ||
| if namespace == "" { | ||
| http.Error(w, "Missing parameter "+ParamNamespace, http.StatusBadRequest) | ||
| return | ||
| } | ||
| dbType := params.Get(ParamType) | ||
| if dbType == "" { | ||
| http.Error(w, "Missing parameter "+ParamType, http.StatusBadRequest) | ||
| return | ||
| } | ||
| dbName := params.Get(ParamName) | ||
| if dbName == "" { | ||
| http.Error(w, "Missing parameter "+ParamName, http.StatusBadRequest) | ||
| return | ||
| } | ||
| podIP := params.Get(ParamPodIP) | ||
| if podIP == "" { | ||
| http.Error(w, "Missing parameter "+ParamPodIP, http.StatusBadRequest) | ||
| return | ||
| } | ||
|
|
||
| switch dbType { | ||
| case tapi.ResourceTypePostgres: | ||
| var reg *prometheus.Registry | ||
| if val, ok := registerers.Get(r.URL.Path); ok { | ||
| reg = val.(*prometheus.Registry) | ||
| } else { | ||
| reg = prometheus.NewRegistry() | ||
| if absent := registerers.SetIfAbsent(r.URL.Path, reg); !absent { | ||
| r2, _ := registerers.Get(r.URL.Path) | ||
| reg = r2.(*prometheus.Registry) | ||
| } else { | ||
| log.Infof("Configuring exporter for PostgreSQL %s in namespace %s", dbName, namespace) | ||
| db, err := dbClient.Postgreses(namespace).Get(dbName) | ||
| if kerr.IsNotFound(err) { | ||
| http.NotFound(w, r) | ||
| return | ||
| } else if err != nil { | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| conn, err := getPostgresURL(db, podIP) | ||
| if err != nil { | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| reg.MustRegister(pge.NewExporter(conn, "")) | ||
| } | ||
| } | ||
| promhttp.HandlerFor(reg, promhttp.HandlerOpts{}).ServeHTTP(w, r) | ||
| return | ||
| case tapi.ResourceTypeElastic: | ||
| var reg *prometheus.Registry | ||
| if val, ok := registerers.Get(r.URL.Path); ok { | ||
| reg = val.(*prometheus.Registry) | ||
| } else { | ||
| reg = prometheus.NewRegistry() | ||
| if absent := registerers.SetIfAbsent(r.URL.Path, reg); !absent { | ||
| r2, _ := registerers.Get(r.URL.Path) | ||
| reg = r2.(*prometheus.Registry) | ||
| } else { | ||
| log.Infof("Configuring exporter for Elasticsearch %s in namespace %s", dbName, namespace) | ||
| _, err := dbClient.Elastics(namespace).Get(dbName) | ||
| if kerr.IsNotFound(err) { | ||
| http.NotFound(w, r) | ||
| return | ||
| } else if err != nil { | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| esURI := fmt.Sprintf("http://%s:9200", podIP) | ||
| nodesStatsURI := esURI + "/_nodes/_local/stats" | ||
| clusterHealthURI := esURI + "/_cluster/health" | ||
| esTimeout := 5 * time.Second | ||
| esAllNodes := false | ||
| exporter := ese.NewExporter(nodesStatsURI, clusterHealthURI, esTimeout, esAllNodes, nil) | ||
| reg.MustRegister(exporter) | ||
| } | ||
| } | ||
| promhttp.HandlerFor(reg, promhttp.HandlerOpts{}).ServeHTTP(w, r) | ||
| return | ||
| } | ||
| http.NotFound(w, r) | ||
| } | ||
|
|
||
| func getPostgresURL(db *tapi.Postgres, podIP string) (string, error) { | ||
| secret, err := kubeClient.Core().Secrets(db.Namespace).Get(db.Spec.DatabaseSecret.SecretName) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| cfg, err := ini.Load(secret.Data[".admin"]) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| section, err := cfg.GetSection("") | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| user := "postgres" | ||
| if k, err := section.GetKey("POSTGRES_USER"); err == nil { | ||
| user = k.Value() | ||
| } | ||
| var password string | ||
| if k, err := section.GetKey("POSTGRES_PASSWORD"); err == nil { | ||
| password = k.Value() | ||
| } | ||
| conn := fmt.Sprintf("postgres://%s:%s@%s:5432", user, password, podIP) | ||
| return conn, nil | ||
| } |
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