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Sync Prometheus config like for Notifications
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| package internal | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/icinga/icinga-go-library/database" | ||
| "github.com/icinga/icinga-go-library/types" | ||
| "github.com/icinga/icinga-kubernetes/pkg/metrics" | ||
| schemav1 "github.com/icinga/icinga-kubernetes/pkg/schema/v1" | ||
| "github.com/jmoiron/sqlx" | ||
| "github.com/pkg/errors" | ||
| v1 "k8s.io/api/core/v1" | ||
| kmetav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/rest" | ||
| "strings" | ||
| ) | ||
|
|
||
| func SyncPrometheusConfig(ctx context.Context, db *database.DB, config *metrics.PrometheusConfig) error { | ||
| _true := types.Bool{Bool: true, Valid: true} | ||
|
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| if config.Url != "" { | ||
| toDb := []schemav1.Config{ | ||
| {Key: schemav1.ConfigKeyPrometheusUrl, Value: config.Url, Locked: _true}, | ||
| } | ||
|
|
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| if config.Username != "" { | ||
| toDb = append( | ||
| toDb, | ||
| schemav1.Config{Key: schemav1.ConfigKeyPrometheusUsername, Value: config.Username, Locked: _true}, | ||
| schemav1.Config{Key: schemav1.ConfigKeyPrometheusPassword, Value: config.Password, Locked: _true}, | ||
| ) | ||
| } | ||
|
|
||
| err := db.ExecTx(ctx, func(ctx context.Context, tx *sqlx.Tx) error { | ||
| if _, err := tx.ExecContext( | ||
| ctx, | ||
| fmt.Sprintf( | ||
| `DELETE FROM "%s" WHERE "key" LIKE ? AND "locked" = ?`, | ||
| database.TableName(&schemav1.Config{}), | ||
| ), | ||
| `prometheus.%`, | ||
| _true, | ||
| ); err != nil { | ||
| return errors.Wrap(err, "cannot delete Prometheus config") | ||
| } | ||
|
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| stmt, _ := db.BuildInsertStmt(schemav1.Config{}) | ||
| if _, err := tx.NamedExecContext(ctx, stmt, toDb); err != nil { | ||
| return errors.Wrap(err, "cannot insert Prometheus config") | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
| if err != nil { | ||
| return errors.Wrap(err, "cannot upsert Prometheus config") | ||
| } | ||
| } else { | ||
| err := db.ExecTx(ctx, func(ctx context.Context, tx *sqlx.Tx) error { | ||
| if _, err := tx.ExecContext( | ||
| ctx, | ||
| fmt.Sprintf( | ||
| `DELETE FROM "%s" WHERE "key" LIKE ? AND "locked" = ?`, | ||
| database.TableName(&schemav1.Config{}), | ||
| ), | ||
| `prometheus.%`, | ||
| _true, | ||
| ); err != nil { | ||
| return errors.Wrap(err, "cannot delete Prometheus config") | ||
| } | ||
|
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| rows, err := tx.QueryxContext(ctx, db.BuildSelectStmt(&schemav1.Config{}, &schemav1.Config{})) | ||
| if err != nil { | ||
| return errors.Wrap(err, "cannot fetch Prometheus config from DB") | ||
| } | ||
|
|
||
| for rows.Next() { | ||
| var r schemav1.Config | ||
| if err := rows.StructScan(&r); err != nil { | ||
| return errors.Wrap(err, "cannot fetch Prometheus config from DB") | ||
| } | ||
|
|
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| switch r.Key { | ||
| case schemav1.ConfigKeyPrometheusUrl: | ||
| config.Url = r.Value | ||
| case schemav1.ConfigKeyPrometheusUsername: | ||
| config.Username = r.Value | ||
| case schemav1.ConfigKeyPrometheusPassword: | ||
| config.Password = r.Value | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
| if err != nil { | ||
| return errors.Wrap(err, "cannot retrieve Prometheus config") | ||
| } | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| // AutoDetectPrometheus tries to auto-detect the Prometheus service in the monitoring namespace and | ||
| // if found sets the URL in the supplied Prometheus configuration. The first service with the label | ||
| // "app.kubernetes.io/name=prometheus" is used. Until now the ServiceTypes ClusterIP and NodePort are supported. | ||
| func AutoDetectPrometheus(ctx context.Context, clientset *kubernetes.Clientset, config *metrics.PrometheusConfig) error { | ||
| services, err := clientset.CoreV1().Services("monitoring").List(ctx, kmetav1.ListOptions{ | ||
| LabelSelector: "app.kubernetes.io/name=prometheus", | ||
| }) | ||
| if err != nil { | ||
| return errors.Wrap(err, "cannot list Prometheus services") | ||
| } | ||
|
|
||
| if len(services.Items) == 0 { | ||
| return errors.New("no Prometheus service found") | ||
| } | ||
|
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| var ip string | ||
| var port int32 | ||
|
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| // Check if we are running in a Kubernetes cluster. If so, use the | ||
| // service's ClusterIP. Otherwise, use the API Server's IP and NodePort. | ||
| if _, err = rest.InClusterConfig(); err == nil { | ||
| for _, service := range services.Items { | ||
| if service.Spec.Type == v1.ServiceTypeClusterIP { | ||
| ip = service.Spec.ClusterIP | ||
| port = service.Spec.Ports[0].Port | ||
|
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| break | ||
| } | ||
| } | ||
| } else if errors.Is(err, rest.ErrNotInCluster) { | ||
| for _, service := range services.Items { | ||
| if service.Spec.Type == v1.ServiceTypeNodePort { | ||
| ip = strings.Split(clientset.RESTClient().Get().URL().Host, ":")[0] | ||
| port = service.Spec.Ports[0].NodePort | ||
|
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| break | ||
| } | ||
| } | ||
| } | ||
|
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| if ip == "" { | ||
|
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| } | ||
|
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| config.Url = fmt.Sprintf("http://%s:%d", ip, port) | ||
|
|
||
| return nil | ||
| } |
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