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diskio.go
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diskio.go
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package diskio
import (
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/metricbeat/mb"
"github.com/elastic/beats/metricbeat/module/docker"
dc "github.com/fsouza/go-dockerclient"
)
func init() {
if err := mb.Registry.AddMetricSet("docker", "diskio", New, docker.HostParser); err != nil {
panic(err)
}
}
type MetricSet struct {
mb.BaseMetricSet
blkioService *BLkioService
dockerClient *dc.Client
}
// New create a new instance of the docker diskio MetricSet.
func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
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,
blkioService: &BLkioService{
BlkioSTatsPerContainer: make(map[string]BlkioRaw),
},
}, nil
}
// Fetch creates list of events with diskio stats for all containers.
func (m *MetricSet) Fetch() ([]common.MapStr, error) {
stats, err := docker.FetchStats(m.dockerClient, m.Module().Config().Timeout)
if err != nil {
return nil, err
}
formattedStats := m.blkioService.getBlkioStatsList(stats)
return eventsMapping(formattedStats), nil
}