mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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d6415b2572
'any' type is supported starting from Go1.18. Let's consistently use it
instead of 'interface{}' type across the code base, since `any` is easier to read than 'interface{}'.
105 lines
3.5 KiB
Go
105 lines
3.5 KiB
Go
package kubernetes
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import (
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"flag"
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"fmt"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promauth"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/proxy"
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)
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// SDCheckInterval defines interval for targets refresh.
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var SDCheckInterval = flag.Duration("promscrape.kubernetesSDCheckInterval", 30*time.Second, "Interval for checking for changes in Kubernetes API server. "+
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"This works only if kubernetes_sd_configs is configured in '-promscrape.config' file. "+
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"See https://docs.victoriametrics.com/sd_configs/#kubernetes_sd_configs for details")
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// SDConfig represents kubernetes-based service discovery config.
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//
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// See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#kubernetes_sd_config
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type SDConfig struct {
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APIServer string `yaml:"api_server,omitempty"`
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// Use role() function for accessing the Role field
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Role string `yaml:"role"`
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// The filepath to kube config.
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// If defined any cluster connection information from HTTPClientConfig is ignored.
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KubeConfigFile string `yaml:"kubeconfig_file,omitempty"`
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HTTPClientConfig promauth.HTTPClientConfig `yaml:",inline"`
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ProxyURL *proxy.URL `yaml:"proxy_url,omitempty"`
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Namespaces Namespaces `yaml:"namespaces,omitempty"`
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Selectors []Selector `yaml:"selectors,omitempty"`
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AttachMetadata *AttachMetadata `yaml:"attach_metadata,omitempty"`
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cfg *apiConfig
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startErr error
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}
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func (sdc *SDConfig) role() string {
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if sdc.Role == "endpointslices" {
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// The endpointslices role isn't supported by Prometheus, but it is used by VictoriaMetrics operator.
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// Support it for backwards compatibility.
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return "endpointslice"
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}
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return sdc.Role
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}
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// AttachMetadata represents `attach_metadata` option at `kuberentes_sd_config`.
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//
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// See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#kubernetes_sd_config
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type AttachMetadata struct {
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Node bool `yaml:"node"`
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}
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// Namespaces represents namespaces for SDConfig
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type Namespaces struct {
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OwnNamespace bool `yaml:"own_namespace"`
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Names []string `yaml:"names"`
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}
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// Selector represents kubernetes selector.
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//
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// See https://kubernetes.io/docs/concepts/overview/working-with-objects/field-selectors/
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// and https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
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type Selector struct {
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Role string `yaml:"role"`
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Label string `yaml:"label"`
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Field string `yaml:"field"`
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}
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// ScrapeWorkConstructorFunc must construct ScrapeWork object for the given metaLabels.
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type ScrapeWorkConstructorFunc func(metaLabels *promutils.Labels) any
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// GetScrapeWorkObjects returns ScrapeWork objects for the given sdc.
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//
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// This function must be called after MustStart call.
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func (sdc *SDConfig) GetScrapeWorkObjects() ([]any, error) {
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if sdc.cfg == nil {
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return nil, sdc.startErr
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}
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return sdc.cfg.aw.getScrapeWorkObjects(), nil
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}
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// MustStart initializes sdc before its usage.
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//
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// swcFunc is used for constructing ScrapeWork objects from the given metadata.
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func (sdc *SDConfig) MustStart(baseDir string, swcFunc ScrapeWorkConstructorFunc) {
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cfg, err := newAPIConfig(sdc, baseDir, swcFunc)
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if err != nil {
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sdc.startErr = fmt.Errorf("cannot create API config for kubernetes: %w", err)
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return
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}
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cfg.aw.mustStart()
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sdc.cfg = cfg
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}
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// MustStop stops further usage for sdc.
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func (sdc *SDConfig) MustStop() {
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if sdc.cfg != nil {
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// sdc.cfg can be nil on MustStart error.
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sdc.cfg.aw.mustStop()
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}
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}
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