mirror of
https://github.com/prometheus-operator/prometheus-operator.git
synced 2025-04-16 09:16:38 +00:00
129 lines
3.3 KiB
Go
129 lines
3.3 KiB
Go
// Copyright 2016 The prometheus-operator 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 api
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import (
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"context"
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"encoding/json"
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"net/http"
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"regexp"
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"github.com/go-kit/kit/log"
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"github.com/pkg/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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"github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
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monitoringclient "github.com/prometheus-operator/prometheus-operator/pkg/client/versioned"
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"github.com/prometheus-operator/prometheus-operator/pkg/k8sutil"
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"github.com/prometheus-operator/prometheus-operator/pkg/prometheus"
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)
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type API struct {
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kclient *kubernetes.Clientset
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mclient monitoringclient.Interface
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logger log.Logger
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}
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func New(conf prometheus.Config, l log.Logger) (*API, error) {
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cfg, err := k8sutil.NewClusterConfig(conf.Host, conf.TLSInsecure, &conf.TLSConfig)
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if err != nil {
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return nil, errors.Wrap(err, "instantiating cluster config failed")
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}
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kclient, err := kubernetes.NewForConfig(cfg)
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if err != nil {
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return nil, errors.Wrap(err, "instantiating kubernetes client failed")
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}
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mclient, err := monitoringclient.NewForConfig(cfg)
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if err != nil {
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return nil, errors.Wrap(err, "instantiating monitoring client failed")
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}
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return &API{
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kclient: kclient,
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mclient: mclient,
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logger: l,
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}, nil
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}
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var (
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prometheusRoute = regexp.MustCompile("/apis/monitoring.coreos.com/" + v1.Version + "/namespaces/(.*)/prometheuses/(.*)/status")
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)
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func (api *API) Register(mux *http.ServeMux) {
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mux.HandleFunc("/healthz", ok)
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mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
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if prometheusRoute.MatchString(req.URL.Path) {
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api.prometheusStatus(w, req)
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} else {
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w.WriteHeader(404)
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}
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})
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}
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type objectReference struct {
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name string
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namespace string
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}
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func parsePrometheusStatusUrl(path string) objectReference {
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matches := prometheusRoute.FindAllStringSubmatch(path, -1)
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ns := ""
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name := ""
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if len(matches) == 1 {
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if len(matches[0]) == 3 {
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ns = matches[0][1]
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name = matches[0][2]
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}
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}
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return objectReference{
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name: name,
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namespace: ns,
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}
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}
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func (api *API) prometheusStatus(w http.ResponseWriter, req *http.Request) {
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or := parsePrometheusStatusUrl(req.URL.Path)
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p, err := api.mclient.MonitoringV1().Prometheuses(or.namespace).Get(context.TODO(), or.name, metav1.GetOptions{})
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if err != nil {
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if k8sutil.IsResourceNotFoundError(err) {
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w.WriteHeader(404)
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}
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api.logger.Log("error", err)
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return
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}
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p.Status, _, err = prometheus.PrometheusStatus(api.kclient, p)
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if err != nil {
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api.logger.Log("error", err)
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}
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b, err := json.Marshal(p)
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if err != nil {
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api.logger.Log("error", err)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(200)
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w.Write(b)
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}
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func ok(w http.ResponseWriter, _ *http.Request) {
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w.WriteHeader(http.StatusOK)
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}
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