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prometheus_client.go
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prometheus_client.go
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// Copyright 2019 The prometheus-operator 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 e2e
import (
"k8s.io/client-go/kubernetes"
"github.com/Jeffail/gabs"
)
type prometheusClient struct {
kubeClient kubernetes.Interface
}
func newPrometheusClient(kubeClient kubernetes.Interface) *prometheusClient {
return &prometheusClient{kubeClient}
}
// Query makes a request against the Prometheus /api/v1/query endpoint.
func (c *prometheusClient) query(query string) (int, error) {
req := c.kubeClient.CoreV1().RESTClient().Get().
Namespace("monitoring").
Resource("pods").
SubResource("proxy").
Name("prometheus-k8s-0:9090").
Suffix("/api/v1/query").Param("query", query)
b, err := req.DoRaw()
if err != nil {
return 0, err
}
res, err := gabs.ParseJSON(b)
if err != nil {
return 0, err
}
n, err := res.ArrayCountP("data.result")
return n, err
}