prometheus

Documentation

Overview

Package prometheus contains business logic of working with Prometheus.

Index

• Constants
• type BasicAuth
• type Health
• type LabelPair
• type RelabelConfig
• type ScrapeConfig
• type ScrapeTargetHealth
• type ScrapeTargetReachability
• type Service
  • func NewService(config string, baseURL string, promtool string, consul *consul.Client) (*Service, error)
  • func (svc *Service) Check(ctx context.Context) error
  • func (svc *Service) CreateScrapeConfig(ctx context.Context, cfg *ScrapeConfig, checkReachability bool) error
  • func (svc *Service) DeleteScrapeConfig(ctx context.Context, jobName string) error
  • func (svc *Service) GetScrapeConfig(ctx context.Context, jobName string) (*ScrapeConfig, []ScrapeTargetHealth, error)
  • func (svc *Service) ListScrapeConfigs(ctx context.Context) ([]ScrapeConfig, []ScrapeTargetHealth, error)
  • func (svc *Service) SetScrapeConfigs(ctx context.Context, useConsul bool, configs ...*ScrapeConfig) error
  • func (svc *Service) UpdateScrapeConfig(ctx context.Context, cfg *ScrapeConfig, checkReachability bool) error
• type StaticConfig
• type TLSConfig

Constants

const (
	// store scrape configs in Consul under that key
	ConsulKey = "prometheus/scrape_configs"
)

Types

type BasicAuth

type BasicAuth struct {
	Username string
	Password string
}

type Health

type Health string

Health of the target.

const (
	// HealthUnknown represents unknown health state of target.
	HealthUnknown Health = "unknown"
	// HealthDown represents target that is down.
	HealthDown Health = "down"
	// HealthUp represents target that is up and healthy.
	HealthUp Health = "up"
)

type LabelPair

type LabelPair struct {
	Name  string
	Value string
}

type RelabelConfig

type RelabelConfig struct {
	TargetLabel string
	Replacement string
}

type ScrapeConfig

type ScrapeConfig struct {
	JobName        string
	ScrapeInterval string
	ScrapeTimeout  string
	MetricsPath    string
	HonorLabels    bool
	Scheme         string
	BasicAuth      *BasicAuth
	TLSConfig      TLSConfig
	StaticConfigs  []StaticConfig
	RelabelConfigs []RelabelConfig
}

type ScrapeTargetHealth

type ScrapeTargetHealth struct {
	JobName  string
	Job      string
	Target   string
	Instance string
	Health   Health
}

ScrapeTargetHealth represents Prometheus scrape target health: unknown, down, or up.

type ScrapeTargetReachability

type ScrapeTargetReachability struct {
	Target string
	Error  string
}

ScrapeTargetReachability represents a single reachability check result.

type Service

type Service struct {
	ConfigPath string
	// contains filtered or unexported fields
}

Service is responsible for interactions with Prometheus. It assumes the following:

• Prometheus API is accessible;
• Prometheus configuration and rule files are accessible;
• promtool is available.

func NewService

func NewService(config string, baseURL string, promtool string, consul *consul.Client) (*Service, error)

func (*Service) Check

func (svc *Service) Check(ctx context.Context) error

Check updates Prometehus configuration using information from Consul KV. (During PMM update prometheus.yml is overwritten, but Consul data directory is kept.) It returns error if configuration is not right or Prometheus is not available.

func (*Service) CreateScrapeConfig

func (svc *Service) CreateScrapeConfig(ctx context.Context, cfg *ScrapeConfig, checkReachability bool) error

CreateScrapeConfig creates a new scrape config. Errors: InvalidArgument(3) if some argument is not valid, AlreadyExists(6) if scrape config with that job name is already present, FailedPrecondition(9) if reachability check was requested and some scrape target can't be reached.

func (*Service) DeleteScrapeConfig

func (svc *Service) DeleteScrapeConfig(ctx context.Context, jobName string) error

DeleteScrapeConfig removes existing scrape config by job name. Errors: NotFound(5) if no such scrape config is present.

func (*Service) GetScrapeConfig

func (svc *Service) GetScrapeConfig(ctx context.Context, jobName string) (*ScrapeConfig, []ScrapeTargetHealth, error)

GetScrapeConfig returns a scrape config by job name. Errors: NotFound(5) if no such scrape config is present.

func (*Service) ListScrapeConfigs

func (svc *Service) ListScrapeConfigs(ctx context.Context) ([]ScrapeConfig, []ScrapeTargetHealth, error)

ListScrapeConfigs returns all scrape configs.

func (*Service) SetScrapeConfigs

func (svc *Service) SetScrapeConfigs(ctx context.Context, useConsul bool, configs ...*ScrapeConfig) error

SetScrapeConfigs creates new or completely replaces existing scrape configs with a given names. Errors: InvalidArgument(3) if some argument is not valid.

func (*Service) UpdateScrapeConfig

func (svc *Service) UpdateScrapeConfig(ctx context.Context, cfg *ScrapeConfig, checkReachability bool) error

UpdateScrapeConfig updates existing scrape config by job name. Errors: InvalidArgument(3) if some argument is not valid, NotFound(5) if no such scrape config is present, FailedPrecondition(9) if reachability check was requested and some scrape target can't be reached.

type StaticConfig

type StaticConfig struct {
	Targets []string
	Labels  []LabelPair
}

type TLSConfig

type TLSConfig struct {
	InsecureSkipVerify bool
}