mirror of https://github.com/minio/minio.git
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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