firehol/netdata

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

package openvpn_status_log

import (
    _ "embed"
    "errors"

    "github.com/netdata/netdata/go/plugins/pkg/matcher"
    "github.com/netdata/netdata/go/plugins/plugin/go.d/agent/module"
)

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

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

func New() *OpenVPNStatusLog {
    return &OpenVPNStatusLog{
        Config: Config{
            LogPath: "/var/log/openvpn/status.log",
        },
        charts:         charts.Copy(),
        collectedUsers: make(map[string]bool),
    }
}

type Config struct {
    UpdateEvery  int                `yaml:"update_every,omitempty" json:"update_every"`
    LogPath      string             `yaml:"log_path" json:"log_path"`
    PerUserStats matcher.SimpleExpr `yaml:"per_user_stats,omitempty" json:"per_user_stats"`
}

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

    charts *module.Charts

    perUserMatcher matcher.Matcher
    collectedUsers map[string]bool
}

func (o *OpenVPNStatusLog) Configuration() any {
    return o.Config
}

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

    m, err := o.initPerUserStatsMatcher()
    if err != nil {
        o.Errorf("error on creating 'per_user_stats' matcher: %v", err)
        return err
    }
    if m != nil {
        o.perUserMatcher = m
    }

    return nil
}

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

func (o *OpenVPNStatusLog) Charts() *module.Charts {
    return o.charts
}

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

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

func (o *OpenVPNStatusLog) Cleanup() {}