// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 collector
import (
"time"
"encoding/json"
v1 "github.com/google/cadvisor/info/v1"
)
type Config struct {
// the endpoint to hit to scrape metrics
Endpoint EndpointConfig `json:"endpoint"`
// holds information about different metrics that can be collected
MetricsConfig []MetricConfig `json:"metrics_config"`
}
// metricConfig holds information extracted from the config file about a metric
type MetricConfig struct {
// the name of the metric
Name string `json:"name"`
// enum type for the metric type
MetricType v1.MetricType `json:"metric_type"`
// metric units to display on UI and in storage (eg: MB, cores)
// this is only used for display.
Units string `json:"units"`
// data type of the metric (eg: int, float)
DataType v1.DataType `json:"data_type"`
// the frequency at which the metric should be collected
PollingFrequency time.Duration `json:"polling_frequency"`
// the regular expression that can be used to extract the metric
Regex string `json:"regex"`
}
type Prometheus struct {
// the endpoint to hit to scrape metrics
Endpoint EndpointConfig `json:"endpoint"`
// the frequency at which metrics should be collected
PollingFrequency time.Duration `json:"polling_frequency"`
// holds names of different metrics that can be collected
MetricsConfig []string `json:"metrics_config"`
}
type EndpointConfig struct {
// The full URL of the endpoint to reach
URL string
// A configuration in which an actual URL is constructed from, using the container's ip address
URLConfig URLConfig
}
type URLConfig struct {
// the protocol to use for connecting to the endpoint. Eg 'http' or 'https'
Protocol string `json:"protocol"`
// the port to use for connecting to the endpoint. Eg '8778'
Port json.Number `json:"port"`
// the path to use for the endpoint. Eg '/metrics'
Path string `json:"path"`
}
func (ec *EndpointConfig) UnmarshalJSON(b []byte) error {
url := ""
config := URLConfig{
Protocol: "http",
Port: "8000",
}
if err := json.Unmarshal(b, &url); err == nil {
ec.URL = url
return nil
}
err := json.Unmarshal(b, &config)
if err == nil {
ec.URLConfig = config
return nil
}
return err
}