mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-29 23:30:04 +01:00
112 lines
3.0 KiB
Go
112 lines
3.0 KiB
Go
package docker
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import (
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"encoding/json"
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"fmt"
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"strconv"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
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)
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// See https://github.com/moby/moby/blob/314759dc2f4745925d8dec6d15acc7761c6e5c92/docs/api/v1.41.yaml#L4024
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type container struct {
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Id string
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Names []string
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Labels map[string]string
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Ports []struct {
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IP string
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PrivatePort int
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PublicPort int
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Type string
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}
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HostConfig struct {
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NetworkMode string
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}
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NetworkSettings struct {
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Networks map[string]struct {
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IPAddress string
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NetworkID string
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}
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}
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}
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func getContainersLabels(cfg *apiConfig) ([]map[string]string, error) {
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networkLabels, err := getNetworksLabelsByNetworkID(cfg)
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if err != nil {
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return nil, err
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}
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containers, err := getContainers(cfg)
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if err != nil {
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return nil, err
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}
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return addContainersLabels(containers, networkLabels, cfg.port), nil
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}
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func getContainers(cfg *apiConfig) ([]container, error) {
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resp, err := cfg.getAPIResponse("/containers/json")
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if err != nil {
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return nil, fmt.Errorf("cannot query dockerd api for containers: %w", err)
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}
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return parseContainers(resp)
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}
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func parseContainers(data []byte) ([]container, error) {
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var containers []container
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if err := json.Unmarshal(data, &containers); err != nil {
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return nil, fmt.Errorf("cannot parse containers: %w", err)
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}
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return containers, nil
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}
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func addContainersLabels(containers []container, networkLabels map[string]map[string]string, defaultPort int) []map[string]string {
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var ms []map[string]string
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for i := range containers {
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c := &containers[i]
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if len(c.Names) == 0 {
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continue
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}
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for _, n := range c.NetworkSettings.Networks {
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var added bool
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for _, p := range c.Ports {
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if p.Type != "tcp" {
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continue
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}
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m := map[string]string{
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"__address__": discoveryutils.JoinHostPort(n.IPAddress, p.PrivatePort),
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"__meta_docker_network_ip": n.IPAddress,
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"__meta_docker_port_private": strconv.Itoa(p.PrivatePort),
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}
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if p.PublicPort > 0 {
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m["__meta_docker_port_public"] = strconv.Itoa(p.PublicPort)
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m["__meta_docker_port_public_ip"] = p.IP
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}
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addCommonLabels(m, c, networkLabels[n.NetworkID])
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ms = append(ms, m)
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added = true
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}
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if !added {
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// Use fallback port when no exposed ports are available or if all are non-TCP
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m := map[string]string{
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"__address__": discoveryutils.JoinHostPort(n.IPAddress, defaultPort),
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"__meta_docker_network_ip": n.IPAddress,
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}
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addCommonLabels(m, c, networkLabels[n.NetworkID])
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ms = append(ms, m)
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}
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}
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}
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return ms
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}
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func addCommonLabels(m map[string]string, c *container, networkLabels map[string]string) {
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m["__meta_docker_container_id"] = c.Id
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m["__meta_docker_container_name"] = c.Names[0]
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m["__meta_docker_container_network_mode"] = c.HostConfig.NetworkMode
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for k, v := range c.Labels {
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m["__meta_docker_container_label_"+discoveryutils.SanitizeLabelName(k)] = v
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}
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for k, v := range networkLabels {
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m[k] = v
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}
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}
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