firehol/netdata

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

package dockerhub

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("dockerhub", module.Creator{
        JobConfigSchema: configSchema,
        Defaults: module.Defaults{
            UpdateEvery: 5,
        },
        Create: func() module.Module { return New() },
        Config: func() any { return &Config{} },
    })
}

func New() *DockerHub {
    return &DockerHub{
        Config: Config{
            HTTPConfig: web.HTTPConfig{
                RequestConfig: web.RequestConfig{
                    URL: "https://hub.docker.com/v2/repositories",
                },
                ClientConfig: web.ClientConfig{
                    Timeout: confopt.Duration(time.Second * 2),
                },
            },
        },
    }
}

type Config struct {
    UpdateEvery    int `yaml:"update_every,omitempty" json:"update_every"`
    web.HTTPConfig `yaml:",inline" json:""`
    Repositories   []string `yaml:"repositories" json:"repositories"`
}

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

    client *apiClient
}

func (dh *DockerHub) Configuration() any {
    return dh.Config
}

func (dh *DockerHub) Init() error {
    if err := dh.validateConfig(); err != nil {
        dh.Errorf("config validation: %v", err)
        return err
    }

    client, err := dh.initApiClient()
    if err != nil {
        dh.Error(err)
        return err
    }
    dh.client = client

    return nil
}

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

    }
    return nil
}

func (dh *DockerHub) Charts() *Charts {
    cs := charts.Copy()
    addReposToCharts(dh.Repositories, cs)
    return cs
}

func (dh *DockerHub) Collect() map[string]int64 {
    mx, err := dh.collect()

    if err != nil {
        dh.Error(err)
        return nil
    }

    return mx
}

func (dh *DockerHub) Cleanup() {
    if dh.client != nil && dh.client.httpClient != nil {
        dh.client.httpClient.CloseIdleConnections()
    }
}