minio/cmd/metrics-router.go

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/*
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
*
* 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 cmd
import (
"os"
"strings"
"github.com/gorilla/mux"
)
const (
prometheusMetricsPathLegacy = "/prometheus/metrics"
prometheusMetricsV2ClusterPath = "/v2/metrics/cluster"
prometheusMetricsV2NodePath = "/v2/metrics/node"
)
// Standard env prometheus auth type
const (
EnvPrometheusAuthType = "MINIO_PROMETHEUS_AUTH_TYPE"
)
type prometheusAuthType string
const (
prometheusJWT prometheusAuthType = "jwt"
prometheusPublic prometheusAuthType = "public"
)
// registerMetricsRouter - add handler functions for metrics.
func registerMetricsRouter(router *mux.Router) {
// metrics router
metricsRouter := router.NewRoute().PathPrefix(minioReservedBucketPath).Subrouter()
authType := strings.ToLower(os.Getenv(EnvPrometheusAuthType))
switch prometheusAuthType(authType) {
case prometheusPublic:
metricsRouter.Handle(prometheusMetricsPathLegacy, metricsHandler())
metricsRouter.Handle(prometheusMetricsV2ClusterPath, metricsServerHandler())
metricsRouter.Handle(prometheusMetricsV2NodePath, metricsNodeHandler())
case prometheusJWT:
fallthrough
default:
metricsRouter.Handle(prometheusMetricsPathLegacy, AuthMiddleware(metricsHandler()))
metricsRouter.Handle(prometheusMetricsV2ClusterPath, AuthMiddleware(metricsServerHandler()))
metricsRouter.Handle(prometheusMetricsV2NodePath, AuthMiddleware(metricsNodeHandler()))
}
}