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02cfa774be
when server is booting up there is a possibility that users might see '503' because object layer when not initialized, then the request is proxied to neighboring peers first one which is online.
85 lines
2.7 KiB
Go
85 lines
2.7 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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"context"
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"net/http"
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"strconv"
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xhttp "github.com/minio/minio/cmd/http"
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)
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const unavailable = "offline"
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// ClusterCheckHandler returns if the server is ready for requests.
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func ClusterCheckHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "ClusterCheckHandler")
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objLayer := newObjectLayerFn()
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// Service not initialized yet
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if objLayer == nil {
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w.Header().Set(xhttp.MinIOServerStatus, unavailable)
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writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
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return
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}
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ctx, cancel := context.WithTimeout(ctx, globalAPIConfig.getClusterDeadline())
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defer cancel()
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opts := HealthOptions{Maintenance: r.URL.Query().Get("maintenance") == "true"}
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result := objLayer.Health(ctx, opts)
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if result.WriteQuorum > 0 {
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w.Header().Set(xhttp.MinIOWriteQuorum, strconv.Itoa(result.WriteQuorum))
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}
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if !result.Healthy {
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// return how many drives are being healed if any
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if result.HealingDrives > 0 {
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w.Header().Set(xhttp.MinIOHealingDrives, strconv.Itoa(result.HealingDrives))
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}
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// As a maintenance call we are purposefully asked to be taken
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// down, this is for orchestrators to know if we can safely
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// take this server down, return appropriate error.
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if opts.Maintenance {
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writeResponse(w, http.StatusPreconditionFailed, nil, mimeNone)
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} else {
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writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
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}
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return
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}
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writeResponse(w, http.StatusOK, nil, mimeNone)
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}
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// ReadinessCheckHandler Checks if the process is up. Always returns success.
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func ReadinessCheckHandler(w http.ResponseWriter, r *http.Request) {
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if newObjectLayerFn() == nil {
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// Service not initialized yet
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w.Header().Set(xhttp.MinIOServerStatus, unavailable)
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}
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writeResponse(w, http.StatusOK, nil, mimeNone)
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}
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// LivenessCheckHandler - Checks if the process is up. Always returns success.
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func LivenessCheckHandler(w http.ResponseWriter, r *http.Request) {
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if newObjectLayerFn() == nil {
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// Service not initialized yet
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w.Header().Set(xhttp.MinIOServerStatus, unavailable)
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}
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writeResponse(w, http.StatusOK, nil, mimeNone)
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}
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