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c0ac25bfff
Readiness as no reasoning to be cluster scope because that is not how the k8s networking works for pods, all the pods to a deployment are not sharing the network in a singleton. Instead they are run as local scopes to themselves, with readiness failures the pod is potentially taken out of the network to be resolvable - this affects the distributed setup in myriad of different ways. Instead readiness should behave like liveness with local scope alone, and should be a dummy implementation. This PR all the startup times and overal k8s startup time dramatically improves. Added another handler called as `/minio/health/cluster` to understand the cluster scope health.
50 lines
1.8 KiB
Go
50 lines
1.8 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"net/http"
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"github.com/gorilla/mux"
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)
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const (
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healthCheckPath = "/health"
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healthCheckLivenessPath = "/live"
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healthCheckReadinessPath = "/ready"
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healthCheckClusterPath = "/cluster"
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healthCheckPathPrefix = minioReservedBucketPath + healthCheckPath
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)
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// registerHealthCheckRouter - add handler functions for liveness and readiness routes.
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func registerHealthCheckRouter(router *mux.Router) {
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// Healthcheck router
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healthRouter := router.PathPrefix(healthCheckPathPrefix).Subrouter()
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// Cluster check handler to verify cluster is active
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healthRouter.Methods(http.MethodGet).Path(healthCheckClusterPath).HandlerFunc(httpTraceAll(ClusterCheckHandler))
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// Liveness handler
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healthRouter.Methods(http.MethodGet).Path(healthCheckLivenessPath).HandlerFunc(httpTraceAll(LivenessCheckHandler))
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healthRouter.Methods(http.MethodHead).Path(healthCheckLivenessPath).HandlerFunc(httpTraceAll(LivenessCheckHandler))
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// Readiness handler
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healthRouter.Methods(http.MethodGet).Path(healthCheckReadinessPath).HandlerFunc(httpTraceAll(ReadinessCheckHandler))
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healthRouter.Methods(http.MethodHead).Path(healthCheckReadinessPath).HandlerFunc(httpTraceAll(ReadinessCheckHandler))
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}
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