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promtail.go
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promtail.go
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package promtail
import (
"github.com/cortexproject/cortex/pkg/util"
"github.com/grafana/loki/pkg/promtail/client"
"github.com/grafana/loki/pkg/promtail/config"
"github.com/grafana/loki/pkg/promtail/positions"
"github.com/grafana/loki/pkg/promtail/server"
"github.com/grafana/loki/pkg/promtail/targets"
)
// Promtail is the root struct for Promtail...
type Promtail struct {
client client.Client
positions *positions.Positions
targetManagers *targets.TargetManagers
server *server.Server
}
// New makes a new Promtail.
func New(cfg config.Config) (*Promtail, error) {
positions, err := positions.New(util.Logger, cfg.PositionsConfig)
if err != nil {
return nil, err
}
if cfg.ClientConfig.URL.URL != nil {
// if a single client config is used we add it to the multiple client config for backward compatibility
cfg.ClientConfigs = append(cfg.ClientConfigs, cfg.ClientConfig)
}
client, err := client.NewMulti(util.Logger, cfg.ClientConfigs...)
if err != nil {
return nil, err
}
tms, err := targets.NewTargetManagers(util.Logger, positions, client, cfg.ScrapeConfig, &cfg.TargetConfig)
if err != nil {
return nil, err
}
server, err := server.New(cfg.ServerConfig, tms)
if err != nil {
return nil, err
}
return &Promtail{
client: client,
positions: positions,
targetManagers: tms,
server: server,
}, nil
}
// Run the promtail; will block until a signal is received.
func (p *Promtail) Run() error {
return p.server.Run()
}
// Shutdown the promtail.
func (p *Promtail) Shutdown() {
p.server.Shutdown()
p.targetManagers.Stop()
p.positions.Stop()
p.client.Stop()
}