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container.go
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container.go
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package container
import (
dc "github.com/fsouza/go-dockerclient"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/logp"
"github.com/elastic/beats/metricbeat/mb"
"github.com/elastic/beats/metricbeat/module/docker"
)
func init() {
if err := mb.Registry.AddMetricSet("docker", "container", New, docker.HostParser); err != nil {
panic(err)
}
}
type MetricSet struct {
mb.BaseMetricSet
dockerClient *dc.Client
}
// New creates a new instance of the docker container MetricSet.
func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
logp.Warn("EXPERIMENTAL: The docker container metricset is experimental")
config := docker.Config{}
if err := base.Module().UnpackConfig(&config); err != nil {
return nil, err
}
client, err := docker.NewDockerClient(base.HostData().URI, config)
if err != nil {
return nil, err
}
return &MetricSet{
BaseMetricSet: base,
dockerClient: client,
}, nil
}
// Fetch returns a list of all containers as events.
// This is based on https://docs.docker.com/engine/reference/api/docker_remote_api_v1.24/#/list-containers.
func (m *MetricSet) Fetch() ([]common.MapStr, error) {
// Fetch a list of all containers.
containers, err := m.dockerClient.ListContainers(dc.ListContainersOptions{})
if err != nil {
return nil, err
}
return eventsMapping(containers), nil
}