firehol/netdata

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

package vcsa

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/web"
)

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

func init() {
    module.Register("vcsa", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            UpdateEvery: 5, // VCSA health checks freq is 5 second.
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *VCSA {
    return &VCSA{
        Config: Config{
            HTTPConfig: web.HTTPConfig{
                ClientConfig: web.ClientConfig{
                    Timeout: confopt.Duration(time.Second * 5),
                },
            },
        },
        charts: vcsaHealthCharts.Copy(),
    }
}

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

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

        charts *module.Charts

        client healthClient
    }

    healthClient interface {
        Login() error
        Logout() error
        Ping() error
        ApplMgmt() (string, error)
        DatabaseStorage() (string, error)
        Load() (string, error)
        Mem() (string, error)
        SoftwarePackages() (string, error)
        Storage() (string, error)
        Swap() (string, error)
        System() (string, error)
    }
)

func (vc *VCSA) Configuration() any {
    return vc.Config
}

func (vc *VCSA) Init() error {
    if err := vc.validateConfig(); err != nil {
        vc.Error(err)
        return err
    }

    c, err := vc.initHealthClient()
    if err != nil {
        vc.Errorf("error on creating health client : %vc", err)
        return err
    }
    vc.client = c

    vc.Debugf("using URL %s", vc.URL)
    vc.Debugf("using timeout: %s", vc.Timeout)

    return nil
}

func (vc *VCSA) Check() error {
    err := vc.client.Login()
    if err != nil {
        vc.Error(err)
        return err
    }

    mx, err := vc.collect()
    if err != nil {
        vc.Error(err)
        return err
    }

    if len(mx) == 0 {
        return errors.New("no metrics collected")
    }

    return nil
}

func (vc *VCSA) Charts() *module.Charts {
    return vc.charts
}

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

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

func (vc *VCSA) Cleanup() {
    if vc.client == nil {
        return
    }
    err := vc.client.Logout()
    if err != nil {
        vc.Errorf("error on logout : %v", err)
    }
}