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5a6acf85fa
Align the behavior of HTTP-based lifecycle handlers and HTTP-based probers, converging on the probers implementation. This fixes multiple deficiencies in the current implementation of lifecycle handlers surrounding what functionality is available. The functionality is gated by the features.ConsistentHTTPGetHandlers feature gate.
95 lines
2.2 KiB
Go
95 lines
2.2 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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"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/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 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 *Server) 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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