firehol/netdata

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

package nvidia_smi

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"
)

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

func init() {
    module.Register("nvidia_smi", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            UpdateEvery: 10,
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *NvidiaSmi {
    return &NvidiaSmi{
        Config: Config{
            Timeout:  confopt.Duration(time.Second * 10),
            LoopMode: true,
        },
        binName: "nvidia-smi",
        charts:  &module.Charts{},
        gpus:    make(map[string]bool),
        migs:    make(map[string]bool),
    }

}

type Config struct {
    UpdateEvery int              `yaml:"update_every,omitempty" json:"update_every"`
    Timeout     confopt.Duration `yaml:"timeout,omitempty" json:"timeout"`
    BinaryPath  string           `yaml:"binary_path" json:"binary_path"`
    LoopMode    bool             `yaml:"loop_mode,omitempty" json:"loop_mode"`
}

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

    charts *module.Charts

    exec    nvidiaSmiBinary
    binName string

    gpus map[string]bool
    migs map[string]bool
}

func (nv *NvidiaSmi) Configuration() any {
    return nv.Config
}

func (nv *NvidiaSmi) Init() error {
    if nv.exec == nil {
        smi, err := nv.initNvidiaSmiExec()
        if err != nil {
            nv.Error(err)
            return err
        }
        nv.exec = smi
    }

    return nil
}

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

func (nv *NvidiaSmi) Charts() *module.Charts {
    return nv.charts
}

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

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

func (nv *NvidiaSmi) Cleanup() {
    if nv.exec != nil {
        if err := nv.exec.stop(); err != nil {
            nv.Errorf("cleanup: %v", err)
        }
        nv.exec = nil
    }
}