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validator.go
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validator.go
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/*
Copyright 2014 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package componentstatus
import (
"net/http"
"time"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/kubernetes/pkg/probe"
httpprober "k8s.io/kubernetes/pkg/probe/http"
)
const (
probeTimeOut = 20 * time.Second
)
// TODO: this basic interface is duplicated in N places. consolidate?
type httpGet interface {
Get(url string) (*http.Response, error)
}
type ValidatorFn func([]byte) error
type Server struct {
Addr string
Port int
Path string
EnableHTTPS bool
Validate ValidatorFn
}
type ServerStatus struct {
// +optional
Component string `json:"component,omitempty"`
// +optional
Health string `json:"health,omitempty"`
// +optional
HealthCode probe.Result `json:"healthCode,omitempty"`
// +optional
Msg string `json:"msg,omitempty"`
// +optional
Err string `json:"err,omitempty"`
}
func (server *Server) DoServerCheck(prober httpprober.HTTPProber) (probe.Result, string, error) {
scheme := "http"
if server.EnableHTTPS {
scheme = "https"
}
url := utilnet.FormatURL(scheme, server.Addr, server.Port, server.Path)
result, data, err := prober.Probe(url, nil, probeTimeOut)
if err != nil {
return probe.Unknown, "", err
}
if result == probe.Failure {
return probe.Failure, string(data), err
}
if server.Validate != nil {
if err := server.Validate([]byte(data)); err != nil {
return probe.Failure, string(data), err
}
}
return result, string(data), nil
}