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// SPDX-License-Identifier: GPL-3.0-or-later
package docker
import (
"context"
_ "embed"
"errors"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
"github.com/docker/docker/api/types"
typesContainer "github.com/docker/docker/api/types/container"
typesImage "github.com/docker/docker/api/types/image"
typesSystem "github.com/docker/docker/api/types/system"
docker "github.com/docker/docker/client"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("docker", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
})
}
func New() *Docker {
return &Docker{
Config: Config{
Address: docker.DefaultDockerHost,
Timeout: web.Duration(time.Second * 2),
CollectContainerSize: false,
},
charts: summaryCharts.Copy(),
newClient: func(cfg Config) (dockerClient, error) {
return docker.NewClientWithOpts(docker.WithHost(cfg.Address))
},
containers: make(map[string]bool),
}
}
type Config struct {
UpdateEvery int `yaml:"update_every" json:"update_every"`
Address string `yaml:"address" json:"address"`
Timeout web.Duration `yaml:"timeout" json:"timeout"`
CollectContainerSize bool `yaml:"collect_container_size" json:"collect_container_size"`
}
type (
Docker struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
client dockerClient
newClient func(Config) (dockerClient, error)
verNegotiated bool
containers map[string]bool
}
dockerClient interface {
NegotiateAPIVersion(context.Context)
Info(context.Context) (typesSystem.Info, error)
ImageList(context.Context, types.ImageListOptions) ([]typesImage.Summary, error)
ContainerList(context.Context, typesContainer.ListOptions) ([]types.Container, error)
Close() error
}
)
func (d *Docker) Configuration() any {
return d.Config
}
func (d *Docker) Init() error {
return nil
}
func (d *Docker) Check() error {
mx, err := d.collect()
if err != nil {
d.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (d *Docker) Charts() *module.Charts {
return d.charts
}
func (d *Docker) Collect() map[string]int64 {
mx, err := d.collect()
if err != nil {
d.Error(err)
}
if len(mx) == 0 {
return nil
}
return mx
}
func (d *Docker) Cleanup() {
if d.client == nil {
return
}
if err := d.client.Close(); err != nil {
d.Warningf("error on closing docker client: %v", err)
}
d.client = nil
}
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