mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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9b2246c29b
* started work on sd for k8s * continue work on watch sd * fixes * continue work * continue work on sd k8s * disable gzip * fixes typos * log errror * minor fix Co-authored-by: Aliaksandr Valialkin <valyala@gmail.com>
210 lines
6.1 KiB
Go
210 lines
6.1 KiB
Go
package kubernetes
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import (
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"encoding/json"
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"fmt"
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"sync"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
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)
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// EndpointsList implements k8s endpoints list.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#endpointslist-v1-core
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type EndpointsList struct {
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Items []Endpoints
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Metadata listMetadata `json:"metadata"`
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}
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// Endpoints implements k8s endpoints.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#endpoints-v1-core
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type Endpoints struct {
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Metadata ObjectMeta
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Subsets []EndpointSubset
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}
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func (eps *Endpoints) key() string {
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return eps.Metadata.Namespace + "/" + eps.Metadata.Name
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}
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// EndpointSubset implements k8s endpoint subset.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#endpointsubset-v1-core
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type EndpointSubset struct {
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Addresses []EndpointAddress
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NotReadyAddresses []EndpointAddress
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Ports []EndpointPort
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}
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// EndpointAddress implements k8s endpoint address.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#endpointaddress-v1-core
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type EndpointAddress struct {
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Hostname string
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IP string
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NodeName string
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TargetRef ObjectReference
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}
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// ObjectReference implements k8s object reference.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#objectreference-v1-core
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type ObjectReference struct {
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Kind string
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Name string
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Namespace string
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}
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func (or ObjectReference) key() string {
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return or.Namespace + "/" + or.Name
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}
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// EndpointPort implements k8s endpoint port.
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//
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// See https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.17/#endpointport-v1beta1-discovery-k8s-io
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type EndpointPort struct {
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AppProtocol string
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Name string
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Port int
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Protocol string
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}
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// parseEndpointsList parses EndpointsList from data.
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func parseEndpointsList(data []byte) (*EndpointsList, error) {
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var esl EndpointsList
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if err := json.Unmarshal(data, &esl); err != nil {
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return nil, fmt.Errorf("cannot unmarshal EndpointsList from %q: %w", data, err)
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}
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return &esl, nil
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}
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// appendTargetLabels appends labels for each endpoint in eps to ms and returns the result.
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//
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// See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#endpoints
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func (eps *Endpoints) appendTargetLabels(ms []map[string]string, podsCache, servicesCache *sync.Map) []map[string]string {
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var svc *Service
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if svco, ok := servicesCache.Load(eps.key()); ok {
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svc = svco.(*Service)
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}
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podPortsSeen := make(map[*Pod][]int)
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for _, ess := range eps.Subsets {
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for _, epp := range ess.Ports {
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ms = appendEndpointLabelsForAddresses(ms, podPortsSeen, eps, ess.Addresses, epp, podsCache, svc, "true")
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ms = appendEndpointLabelsForAddresses(ms, podPortsSeen, eps, ess.NotReadyAddresses, epp, podsCache, svc, "false")
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}
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}
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// Append labels for skipped ports on seen pods.
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portSeen := func(port int, ports []int) bool {
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for _, p := range ports {
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if p == port {
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return true
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}
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}
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return false
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}
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for p, ports := range podPortsSeen {
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for _, c := range p.Spec.Containers {
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for _, cp := range c.Ports {
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if portSeen(cp.ContainerPort, ports) {
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continue
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}
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addr := discoveryutils.JoinHostPort(p.Status.PodIP, cp.ContainerPort)
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m := map[string]string{
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"__address__": addr,
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}
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p.appendCommonLabels(m)
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p.appendContainerLabels(m, c, &cp)
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if svc != nil {
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svc.appendCommonLabels(m)
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}
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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 appendEndpointLabelsForAddresses(ms []map[string]string, podPortsSeen map[*Pod][]int, eps *Endpoints, eas []EndpointAddress, epp EndpointPort,
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podsCache *sync.Map, svc *Service, ready string) []map[string]string {
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for _, ea := range eas {
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var p *Pod
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if po, ok := podsCache.Load(ea.TargetRef.key()); ok {
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p = po.(*Pod)
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}
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//p := getPod(pods, ea.TargetRef.Namespace, ea.TargetRef.Name)
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m := getEndpointLabelsForAddressAndPort(podPortsSeen, eps, ea, epp, p, svc, ready)
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ms = append(ms, m)
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}
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return ms
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}
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func getEndpointLabelsForAddressAndPort(podPortsSeen map[*Pod][]int, eps *Endpoints, ea EndpointAddress, epp EndpointPort, p *Pod, svc *Service, ready string) map[string]string {
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m := getEndpointLabels(eps.Metadata, ea, epp, ready)
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if svc != nil {
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svc.appendCommonLabels(m)
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}
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eps.Metadata.registerLabelsAndAnnotations("__meta_kubernetes_endpoints", m)
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if ea.TargetRef.Kind != "Pod" || p == nil {
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return m
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}
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p.appendCommonLabels(m)
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for _, c := range p.Spec.Containers {
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for _, cp := range c.Ports {
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if cp.ContainerPort == epp.Port {
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p.appendContainerLabels(m, c, &cp)
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podPortsSeen[p] = append(podPortsSeen[p], cp.ContainerPort)
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break
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}
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}
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}
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return m
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}
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func getEndpointLabels(om ObjectMeta, ea EndpointAddress, epp EndpointPort, ready string) map[string]string {
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addr := discoveryutils.JoinHostPort(ea.IP, epp.Port)
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m := map[string]string{
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"__address__": addr,
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"__meta_kubernetes_namespace": om.Namespace,
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"__meta_kubernetes_endpoints_name": om.Name,
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"__meta_kubernetes_endpoint_ready": ready,
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"__meta_kubernetes_endpoint_port_name": epp.Name,
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"__meta_kubernetes_endpoint_port_protocol": epp.Protocol,
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}
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if ea.TargetRef.Kind != "" {
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m["__meta_kubernetes_endpoint_address_target_kind"] = ea.TargetRef.Kind
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m["__meta_kubernetes_endpoint_address_target_name"] = ea.TargetRef.Name
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}
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if ea.NodeName != "" {
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m["__meta_kubernetes_endpoint_node_name"] = ea.NodeName
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}
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if ea.Hostname != "" {
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m["__meta_kubernetes_endpoint_hostname"] = ea.Hostname
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}
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return m
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}
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func processEndpoints(cfg *apiConfig, sc *SharedKubernetesCache, p *Endpoints, action string) {
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key := buildSyncKey("endpoints", cfg.setName, p.key())
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switch action {
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case "ADDED", "MODIFIED":
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lbs := p.appendTargetLabels(nil, sc.Pods, sc.Services)
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cfg.targetChan <- SyncEvent{
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Labels: lbs,
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Key: key,
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ConfigSectionSet: cfg.setName,
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}
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case "DELETED":
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cfg.targetChan <- SyncEvent{
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Key: key,
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ConfigSectionSet: cfg.setName,
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}
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case "ERROR":
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default:
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logger.Warnf("unexpected action: %s", action)
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}
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}
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