mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 16:30:55 +01:00
117 lines
3.4 KiB
Go
117 lines
3.4 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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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
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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) ([]*promutils.Labels, 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, cfg.hostNetworkingHost), 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]*promutils.Labels, defaultPort int, hostNetworkingHost string) []*promutils.Labels {
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var ms []*promutils.Labels
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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 := promutils.NewLabels(16)
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m.Add("__address__", discoveryutils.JoinHostPort(n.IPAddress, p.PrivatePort))
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m.Add("__meta_docker_network_ip", n.IPAddress)
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m.Add("__meta_docker_port_private", strconv.Itoa(p.PrivatePort))
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if p.PublicPort > 0 {
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m.Add("__meta_docker_port_public", strconv.Itoa(p.PublicPort))
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m.Add("__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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// Remove possible duplicate labels, which can appear after addCommonLabels() call
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m.RemoveDuplicates()
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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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addr := hostNetworkingHost
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if c.HostConfig.NetworkMode != "host" {
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addr = discoveryutils.JoinHostPort(n.IPAddress, defaultPort)
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}
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m := promutils.NewLabels(16)
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m.Add("__address__", addr)
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m.Add("__meta_docker_network_ip", n.IPAddress)
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addCommonLabels(m, c, networkLabels[n.NetworkID])
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// Remove possible duplicate labels, which can appear after addCommonLabels() call
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m.RemoveDuplicates()
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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 *promutils.Labels, c *container, networkLabels *promutils.Labels) {
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m.Add("__meta_docker_container_id", c.ID)
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m.Add("__meta_docker_container_name", c.Names[0])
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m.Add("__meta_docker_container_network_mode", c.HostConfig.NetworkMode)
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for k, v := range c.Labels {
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m.Add(discoveryutils.SanitizeLabelName("__meta_docker_container_label_"+k), v)
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}
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m.AddFrom(networkLabels)
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}
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