83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
/*
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Copyright 2019 The KubeSphere 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 prometheus
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import (
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"fmt"
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jsoniter "github.com/json-iterator/go"
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"io/ioutil"
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"k8s.io/klog"
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"kubesphere.io/kubesphere/pkg/api/monitoring/v1alpha2"
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"net/http"
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"time"
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)
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type PrometheusClient struct {
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client *http.Client
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endpoint string
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secondaryEndpoint string
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}
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func NewPrometheusClient(options *PrometheusOptions) (*PrometheusClient, error) {
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return &PrometheusClient{
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client: &http.Client{
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Timeout: 10 * time.Second,
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},
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endpoint: options.Endpoint,
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secondaryEndpoint: options.SecondaryEndpoint,
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}, nil
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}
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func (c *PrometheusClient) QueryToK8SPrometheus(queryType string, params string) (apiResponse v1alpha2.APIResponse) {
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return c.query(c.endpoint, queryType, params)
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}
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func (c *PrometheusClient) QueryToK8SSystemPrometheus(queryType string, params string) (apiResponse v1alpha2.APIResponse) {
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return c.query(c.secondaryEndpoint, queryType, params)
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}
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var jsonIter = jsoniter.ConfigCompatibleWithStandardLibrary
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func (c *PrometheusClient) query(endpoint string, queryType string, params string) (apiResponse v1alpha2.APIResponse) {
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url := fmt.Sprintf("%s/api/v1/%s?%s", endpoint, queryType, params)
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response, err := c.client.Get(url)
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if err != nil {
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klog.Error(err)
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apiResponse.Status = "error"
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return apiResponse
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}
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defer response.Body.Close()
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body, err := ioutil.ReadAll(response.Body)
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if err != nil {
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klog.Error(err)
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apiResponse.Status = "error"
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return apiResponse
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}
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err = jsonIter.Unmarshal(body, &apiResponse)
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if err != nil {
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klog.Errorf("fail to unmarshal prometheus query result: %s", err.Error())
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apiResponse.Status = "error"
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return apiResponse
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}
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return apiResponse
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}
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