weave-scope/render/detailed/docker_labels.go

package detailed

import (
	"sort"

	"github.com/weaveworks/scope/probe/docker"
	"github.com/weaveworks/scope/report"
)

// NodeDockerLabels produces a table (to be consumed directly by the UI) based
// on an origin ID, which is (optimistically) a node ID in one of our
// topologies.
func NodeDockerLabels(nmd report.Node) []report.MetadataRow {
	if _, ok := nmd.Counters.Lookup(nmd.Topology); ok {
		// This is a group of nodes, so no docker labels!
		return nil
	}

	if nmd.Topology != report.Container && nmd.Topology != report.ContainerImage {
		return nil
	}

	var rows []report.MetadataRow
	// Add labels in alphabetical order
	labels := docker.ExtractLabels(nmd)
	labelKeys := make([]string, 0, len(labels))
	for k := range labels {
		labelKeys = append(labelKeys, k)
	}
	sort.Strings(labelKeys)
	for _, labelKey := range labelKeys {
		rows = append(rows, report.MetadataRow{
			ID:    "label_" + labelKey,
			Label: labelKey,
			Value: labels[labelKey],
		})
	}
	return rows
}