VictoriaMetrics/lib/promscrape/discovery/dockerswarm/dockerswarm.go
Aliaksandr Valialkin 80974621b5
lib/promscrape: follow-up for 8537533beb
- Add a comment describing the purpose of the `role` field inside `apiConfig` struct
- Revert changes at lib/promscrape/discovery/dockerswarm/dockerswarm.go ,
  since they reduce code readability. E.g. the reader needs to look up the named string constants
  in order to get their values.
2023-01-27 14:56:38 -08:00

59 lines
2 KiB
Go

package dockerswarm
import (
"flag"
"fmt"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promauth"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/proxy"
)
// SDCheckInterval defines interval for dockerswarm targets refresh.
var SDCheckInterval = flag.Duration("promscrape.dockerswarmSDCheckInterval", 30*time.Second, "Interval for checking for changes in dockerswarm. "+
"This works only if dockerswarm_sd_configs is configured in '-promscrape.config' file. "+
"See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#dockerswarm_sd_config for details")
// SDConfig represents docker swarm service discovery configuration
//
// See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#dockerswarm_sd_config
type SDConfig struct {
Host string `yaml:"host"`
Role string `yaml:"role"`
Port int `yaml:"port,omitempty"`
Filters []Filter `yaml:"filters,omitempty"`
HTTPClientConfig promauth.HTTPClientConfig `yaml:",inline"`
ProxyURL *proxy.URL `yaml:"proxy_url,omitempty"`
ProxyClientConfig promauth.ProxyClientConfig `yaml:",inline"`
// refresh_interval is obtained from `-promscrape.dockerswarmSDCheckInterval` command-line option
}
// Filter is a filter, which can be passed to SDConfig.
type Filter struct {
Name string `yaml:"name"`
Values []string `yaml:"values"`
}
// GetLabels returns dockerswarm labels according to sdc.
func (sdc *SDConfig) GetLabels(baseDir string) ([]map[string]string, error) {
cfg, err := getAPIConfig(sdc, baseDir)
if err != nil {
return nil, fmt.Errorf("cannot get API config: %w", err)
}
switch sdc.Role {
case "tasks":
return getTasksLabels(cfg)
case "services":
return getServicesLabels(cfg)
case "nodes":
return getNodesLabels(cfg)
default:
return nil, fmt.Errorf("unexpected `role`: %q; must be one of `tasks`, `services` or `nodes`; skipping it", sdc.Role)
}
}
// MustStop stops further usage for sdc.
func (sdc *SDConfig) MustStop() {
configMap.Delete(sdc)
}