act_runner/poller/poller.go
2022-11-24 15:38:01 +08:00

139 lines
3.1 KiB
Go

package poller
import (
"context"
"errors"
"time"
"gitea.com/gitea/act_runner/client"
runnerv1 "gitea.com/gitea/proto-go/runner/v1"
"github.com/bufbuild/connect-go"
log "github.com/sirupsen/logrus"
)
var ErrDataLock = errors.New("Data Lock Error")
func New(cli client.Client, dispatch func(context.Context, *runnerv1.Task) error) *Poller {
return &Poller{
Client: cli,
Dispatch: dispatch,
routineGroup: newRoutineGroup(),
metric: &metric{},
}
}
type Poller struct {
Client client.Client
Filter *client.Filter
Dispatch func(context.Context, *runnerv1.Task) error
routineGroup *routineGroup
metric *metric
}
func (p *Poller) Wait() {
p.routineGroup.Wait()
}
func (p *Poller) Poll(ctx context.Context, n int) error {
for i := 0; i < n; i++ {
func(i int) {
p.routineGroup.Run(func() {
for {
select {
case <-ctx.Done():
log.Infof("stopped the runner: %d", i+1)
return
default:
if ctx.Err() != nil {
log.Infof("stopping the runner: %d", i+1)
return
}
if err := p.poll(ctx, i+1); err != nil {
log.WithField("thread", i+1).
WithError(err).Error("poll error")
select {
case <-ctx.Done():
return
case <-time.After(5 * time.Second):
}
}
}
}
})
}(i)
}
p.routineGroup.Wait()
return nil
}
func (p *Poller) poll(ctx context.Context, thread int) error {
l := log.WithField("thread", thread)
l.Info("poller: request stage from remote server")
reqCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
// request a new build stage for execution from the central
// build server.
resp, err := p.Client.FetchTask(reqCtx, connect.NewRequest(&runnerv1.FetchTaskRequest{}))
if err == context.Canceled || err == context.DeadlineExceeded {
l.WithError(err).Trace("poller: no stage returned")
return nil
}
if err != nil && err == ErrDataLock {
l.WithError(err).Info("task accepted by another runner")
return nil
}
if err != nil {
l.WithError(err).Error("cannot accept task")
return err
}
// exit if a nil or empty stage is returned from the system
// and allow the runner to retry.
if resp.Msg.Task == nil || resp.Msg.Task.Id == 0 {
return nil
}
runCtx, cancel := context.WithTimeout(ctx, time.Hour)
defer cancel()
// update runner status
// running: idle -> active
// stopped: active -> idle
if val := p.metric.IncBusyWorker(); val == 1 {
if _, err := p.Client.UpdateRunner(
ctx,
connect.NewRequest(&runnerv1.UpdateRunnerRequest{
Status: runnerv1.RunnerStatus_RUNNER_STATUS_ACTIVE,
}),
); err != nil {
return err
}
l.Info("update runner status to active")
}
defer func() {
if val := p.metric.DecBusyWorker(); val != 0 {
return
}
defer func() {
if _, err := p.Client.UpdateRunner(
ctx,
connect.NewRequest(&runnerv1.UpdateRunnerRequest{
Status: runnerv1.RunnerStatus_RUNNER_STATUS_IDLE,
}),
); err != nil {
log.Errorln("update status error:", err.Error())
}
l.Info("update runner status to idle")
}()
}()
return p.Dispatch(runCtx, resp.Msg.Task)
}