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prometheus.go
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prometheus.go
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// Copyright 2018 Istio 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 components
import (
"testing"
v1 "github.com/prometheus/client_golang/api/prometheus/v1"
prom "github.com/prometheus/common/model"
"istio.io/istio/pkg/test/framework/api/component"
"istio.io/istio/pkg/test/framework/api/ids"
)
// Prometheus represents a deployed Prometheus instance in a Kubernetes cluster.
type Prometheus interface {
component.Instance
// API Returns the core Prometheus APIs.
API() v1.API
// WaitForQuiesce runs the provided query periodically until the result gets stable.
WaitForQuiesce(fmt string, args ...interface{}) (prom.Value, error)
// WaitForOneOrMore runs the provided query and waits until one (or more for vector) values are available.
WaitForOneOrMore(fmt string, args ...interface{}) error
// Sum all the samples that has the given labels in the given vector value.
Sum(val prom.Value, labels map[string]string) (float64, error)
}
// GetPrometheus from the repository
func GetPrometheus(e component.Repository, t testing.TB) Prometheus {
return e.GetComponentOrFail("", ids.Prometheus, t).(Prometheus)
}