mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
// Copyright 2017 The etcd Authors
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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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package grpcproxy
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import (
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"context"
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"fmt"
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"net/http"
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"time"
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"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
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"go.etcd.io/etcd/client/v3"
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"go.etcd.io/etcd/server/v3/etcdserver/api/etcdhttp"
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"go.uber.org/zap"
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)
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// HandleHealth registers health handler on '/health'.
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func HandleHealth(lg *zap.Logger, mux *http.ServeMux, c *clientv3.Client) {
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if lg == nil {
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lg = zap.NewNop()
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}
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mux.Handle(etcdhttp.PathHealth, etcdhttp.NewHealthHandler(lg, func(excludedAlarms etcdhttp.AlarmSet, serializable bool) etcdhttp.Health { return checkHealth(c) }))
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}
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// HandleProxyHealth registers health handler on '/proxy/health'.
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func HandleProxyHealth(lg *zap.Logger, mux *http.ServeMux, c *clientv3.Client) {
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if lg == nil {
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lg = zap.NewNop()
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}
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mux.Handle(etcdhttp.PathProxyHealth, etcdhttp.NewHealthHandler(lg, func(excludedAlarms etcdhttp.AlarmSet, serializable bool) etcdhttp.Health { return checkProxyHealth(c) }))
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}
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func checkHealth(c *clientv3.Client) etcdhttp.Health {
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h := etcdhttp.Health{Health: "false"}
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ctx, cancel := context.WithTimeout(c.Ctx(), time.Second)
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_, err := c.Get(ctx, "a")
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cancel()
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if err == nil || err == rpctypes.ErrPermissionDenied {
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h.Health = "true"
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} else {
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h.Reason = fmt.Sprintf("GET ERROR:%s", err)
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}
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return h
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}
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func checkProxyHealth(c *clientv3.Client) etcdhttp.Health {
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if c == nil {
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return etcdhttp.Health{Health: "false", Reason: "no connection to proxy"}
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}
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h := checkHealth(c)
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if h.Health != "true" {
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return h
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}
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ctx, cancel := context.WithTimeout(c.Ctx(), time.Second*3)
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ch := c.Watch(ctx, "a", clientv3.WithCreatedNotify())
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select {
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case <-ch:
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case <-ctx.Done():
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h.Health = "false"
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h.Reason = "WATCH TIMEOUT"
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}
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cancel()
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return h
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}
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