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03aad1f823
Instead of numerating all the etcd endpoints known by apiserver, we will group them by purpose. `etcd-0` will be the default etcd, `etcd-1` will be the first resource override, `etcd-2` will be the second override and so on.
122 lines
2.9 KiB
Go
122 lines
2.9 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 componentstatus
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import (
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"context"
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"crypto/tls"
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"fmt"
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"sync"
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"time"
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utilnet "k8s.io/apimachinery/pkg/util/net"
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"k8s.io/apiserver/pkg/storage/storagebackend"
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"k8s.io/apiserver/pkg/storage/storagebackend/factory"
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"k8s.io/kubernetes/pkg/probe"
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httpprober "k8s.io/kubernetes/pkg/probe/http"
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)
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const (
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probeTimeOut = 20 * time.Second
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)
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type ValidatorFn func([]byte) error
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type Server interface {
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DoServerCheck() (probe.Result, string, error)
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}
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type HttpServer struct {
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Addr string
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Port int
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Path string
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EnableHTTPS bool
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TLSConfig *tls.Config
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Validate ValidatorFn
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Prober httpprober.Prober
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Once sync.Once
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}
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type ServerStatus struct {
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// +optional
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Component string `json:"component,omitempty"`
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// +optional
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Health string `json:"health,omitempty"`
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// +optional
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HealthCode probe.Result `json:"healthCode,omitempty"`
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// +optional
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Msg string `json:"msg,omitempty"`
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// +optional
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Err string `json:"err,omitempty"`
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}
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func (server *HttpServer) DoServerCheck() (probe.Result, string, error) {
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// setup the prober
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server.Once.Do(func() {
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if server.Prober != nil {
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return
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}
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const followNonLocalRedirects = true
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server.Prober = httpprober.NewWithTLSConfig(server.TLSConfig, followNonLocalRedirects)
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})
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scheme := "http"
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if server.EnableHTTPS {
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scheme = "https"
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}
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url := utilnet.FormatURL(scheme, server.Addr, server.Port, server.Path)
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req, err := httpprober.NewProbeRequest(url, nil)
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if err != nil {
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return probe.Unknown, "", fmt.Errorf("failed to construct probe request: %w", err)
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}
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result, data, err := server.Prober.Probe(req, probeTimeOut)
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if err != nil {
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return probe.Unknown, "", err
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}
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if result == probe.Failure {
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return probe.Failure, data, err
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}
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if server.Validate != nil {
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if err := server.Validate([]byte(data)); err != nil {
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return probe.Failure, data, err
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}
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}
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return result, data, nil
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}
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type EtcdServer struct {
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storagebackend.Config
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}
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func (server *EtcdServer) DoServerCheck() (probe.Result, string, error) {
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prober, err := factory.CreateProber(server.Config)
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if err != nil {
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return probe.Failure, "", err
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}
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defer prober.Close()
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ctx, cancel := context.WithTimeout(context.Background(), probeTimeOut)
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defer cancel()
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err = prober.Probe(ctx)
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if err != nil {
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return probe.Failure, "", err
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}
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return probe.Success, "ok", err
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}
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