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// SPDX-License-Identifier: GPL-3.0-or-later
package docker_engine
import (
_ "embed"
"errors"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/prometheus"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("docker_engine", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
Config: func() any { return &Config{} },
})
}
func New() *DockerEngine {
return &DockerEngine{
Config: Config{
HTTP: web.HTTP{
Request: web.Request{
URL: "http://127.0.0.1:9323/metrics",
},
Client: web.Client{
Timeout: web.Duration(time.Second),
},
},
},
}
}
type Config struct {
UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
web.HTTP `yaml:",inline" json:""`
}
type DockerEngine struct {
module.Base
Config `yaml:",inline" json:""`
prom prometheus.Prometheus
isSwarmManager bool
hasContainerStates bool
}
func (de *DockerEngine) Configuration() any {
return de.Config
}
func (de *DockerEngine) Init() error {
if err := de.validateConfig(); err != nil {
de.Errorf("config validation: %v", err)
return err
}
prom, err := de.initPrometheusClient()
if err != nil {
de.Error(err)
return err
}
de.prom = prom
return nil
}
func (de *DockerEngine) Check() error {
mx, err := de.collect()
if err != nil {
de.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (de *DockerEngine) Charts() *Charts {
cs := charts.Copy()
if !de.hasContainerStates {
if err := cs.Remove("engine_daemon_container_states_containers"); err != nil {
de.Warning(err)
}
}
if !de.isSwarmManager {
return cs
}
if err := cs.Add(*swarmManagerCharts.Copy()...); err != nil {
de.Warning(err)
}
return cs
}
func (de *DockerEngine) Collect() map[string]int64 {
mx, err := de.collect()
if err != nil {
de.Error(err)
return nil
}
if len(mx) == 0 {
return nil
}
return mx
}
func (de *DockerEngine) Cleanup() {
if de.prom != nil && de.prom.HTTPClient() != nil {
de.prom.HTTPClient().CloseIdleConnections()
}
}
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