firehol/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

package geth

import (
    _ "embed"
    "errors"
    "time"

    "github.com/netdata/netdata/go/plugins/plugin/go.d/agent/module"
    "github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/confopt"
    "github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/prometheus"
    "github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/web"
)

//go:embed "config_schema.json"
var configSchema string

func init() {
    module.Register("geth", module.Creator{
        JobConfigSchema: configSchema,
        Create:          func() module.Module { return New() },
        Config:          func() any { return &Config{} },
    })
}

func New() *Geth {
    return &Geth{
        Config: Config{
            HTTPConfig: web.HTTPConfig{
                RequestConfig: web.RequestConfig{
                    URL: "http://127.0.0.1:6060/debug/metrics/prometheus",
                },
                ClientConfig: web.ClientConfig{
                    Timeout: confopt.Duration(time.Second),
                },
            },
        },
        charts: charts.Copy(),
    }
}

type Config struct {
    web.HTTPConfig `yaml:",inline" json:""`
    UpdateEvery    int `yaml:"update_every" json:"update_every"`
}

type Geth struct {
    module.Base
    Config `yaml:",inline" json:""`

    charts *Charts

    prom prometheus.Prometheus
}

func (g *Geth) Configuration() any {
    return g.Config
}

func (g *Geth) Init() error {
    if err := g.validateConfig(); err != nil {
        g.Errorf("error on validating config: %g", err)
        return err
    }

    prom, err := g.initPrometheusClient()
    if err != nil {
        g.Error(err)
        return err
    }
    g.prom = prom

    return nil
}

func (g *Geth) Check() error {
    mx, err := g.collect()
    if err != nil {
        g.Error(err)
        return err
    }
    if len(mx) == 0 {
        return errors.New("no metrics collected")
    }
    return nil
}

func (g *Geth) Charts() *Charts {
    return g.charts
}

func (g *Geth) Collect() map[string]int64 {
    mx, err := g.collect()
    if err != nil {
        g.Error(err)
    }

    if len(mx) == 0 {
        return nil
    }
    return mx
}

func (g *Geth) Cleanup() {
    if g.prom != nil && g.prom.HTTPClient() != nil {
        g.prom.HTTPClient().CloseIdleConnections()
    }
}