forked from pachyderm/pachyderm
/
master.go
1006 lines (962 loc) · 31.5 KB
/
master.go
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package worker
import (
"archive/tar"
"bytes"
"context"
"fmt"
"io"
"log"
"os"
"path"
"strings"
"time"
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/types"
"github.com/montanaflynn/stats"
"github.com/pachyderm/pachyderm/src/client"
"github.com/pachyderm/pachyderm/src/client/pfs"
"github.com/pachyderm/pachyderm/src/client/pkg/pbutil"
"github.com/pachyderm/pachyderm/src/client/pps"
pfsserver "github.com/pachyderm/pachyderm/src/server/pfs"
"github.com/pachyderm/pachyderm/src/server/pkg/backoff"
col "github.com/pachyderm/pachyderm/src/server/pkg/collection"
"github.com/pachyderm/pachyderm/src/server/pkg/dlock"
"github.com/pachyderm/pachyderm/src/server/pkg/errutil"
"github.com/pachyderm/pachyderm/src/server/pkg/obj"
"github.com/pachyderm/pachyderm/src/server/pkg/ppsconsts"
"github.com/pachyderm/pachyderm/src/server/pkg/ppsutil"
filesync "github.com/pachyderm/pachyderm/src/server/pkg/sync"
pfs_sync "github.com/pachyderm/pachyderm/src/server/pkg/sync"
"github.com/pachyderm/pachyderm/src/server/pkg/watch"
)
const (
// maximumRetriesPerDatum is the maximum number of times each datum
// can failed to be processed before we declare that the job has failed.
maximumRetriesPerDatum = 3
masterLockPath = "_master_worker_lock"
// The number of datums the master caches
numCachedDatums = 1000000
ttl = int64(30)
)
func (a *APIServer) getMasterLogger() *taggedLogger {
result := &taggedLogger{
template: a.logMsgTemplate, // Copy struct
stderrLog: log.Logger{},
marshaler: &jsonpb.Marshaler{},
}
result.stderrLog.SetOutput(os.Stderr)
result.stderrLog.SetFlags(log.LstdFlags | log.Llongfile) // Log file/line
result.template.Master = true
return result
}
func (a *APIServer) getWorkerLogger() *taggedLogger {
result := &taggedLogger{
template: a.logMsgTemplate, // Copy struct
stderrLog: log.Logger{},
marshaler: &jsonpb.Marshaler{},
}
result.stderrLog.SetOutput(os.Stderr)
result.stderrLog.SetFlags(log.LstdFlags | log.Llongfile) // Log file/line
return result
}
func (logger *taggedLogger) jobLogger(jobID string) *taggedLogger {
result := logger.clone()
result.template.JobID = jobID
return result
}
func (a *APIServer) master(masterType string, spawner func(*client.APIClient) error) {
masterLock := dlock.NewDLock(a.etcdClient, path.Join(a.etcdPrefix, masterLockPath, a.pipelineInfo.Pipeline.Name, a.pipelineInfo.Salt))
logger := a.getMasterLogger()
b := backoff.NewInfiniteBackOff()
// Setting a high backoff so that when this master fails, the other
// workers are more likely to become the master.
// Also, we've observed race conditions where StopPipeline would cause
// a master to restart before it's deleted. PPS would then get confused
// by the restart and create the workers again, because the restart would
// bring the pipeline state from PAUSED to RUNNING. By setting a high
// retry interval, the master would be deleted before it gets a chance
// to restart.
b.InitialInterval = 10 * time.Second
backoff.RetryNotify(func() error {
// We use pachClient.Ctx here because it contains auth information.
ctx, cancel := context.WithCancel(a.pachClient.Ctx())
defer cancel() // make sure that everything this loop might spawn gets cleaned up
ctx, err := masterLock.Lock(ctx)
pachClient := a.pachClient.WithCtx(ctx)
if err != nil {
return err
}
defer masterLock.Unlock(ctx)
logger.Logf("Launching %v master process", masterType)
return spawner(pachClient)
}, b, func(err error, d time.Duration) error {
logger.Logf("master: error running the %v master process: %v; retrying in %v", masterType, err, d)
return nil
})
}
func (a *APIServer) jobSpawner(pachClient *client.APIClient) error {
logger := a.getMasterLogger()
// Listen for new commits, and create jobs when they arrive
commitIter, err := pachClient.SubscribeCommit(a.pipelineInfo.Pipeline.Name, a.pipelineInfo.OutputBranch, "", pfs.CommitState_READY)
if err != nil {
return err
}
defer commitIter.Close()
for {
commitInfo, err := commitIter.Next()
if err != nil {
return err
}
if commitInfo.Finished != nil {
continue
}
// Inspect the commit and check again if it has been finished (it may have
// been closed since it was queued, e.g. by StopPipeline or StopJob)
commitInfo, err = pachClient.InspectCommit(commitInfo.Commit.Repo.Name, commitInfo.Commit.ID)
if err != nil {
return err
}
if commitInfo.Finished != nil {
continue // commit finished after queueing
}
// Check if a job was previously created for this commit. If not, make one
var jobInfo *pps.JobInfo // job for commitInfo (new or old)
jobInfos, err := pachClient.ListJob("", nil, commitInfo.Commit, -1, true)
if err != nil {
return err
}
if len(jobInfos) > 1 {
return fmt.Errorf("multiple jobs found for commit: %s/%s", commitInfo.Commit.Repo.Name, commitInfo.Commit.ID)
} else if len(jobInfos) < 1 {
job, err := pachClient.CreateJob(a.pipelineInfo.Pipeline.Name, commitInfo.Commit)
if err != nil {
return err
}
logger.Logf("creating new job %q for output commit %q", job.ID, commitInfo.Commit.ID)
// get jobInfo to look up spec commit, pipeline version, etc (if this
// worker is stale and about to be killed, the new job may have a newer
// pipeline version than the master. Or if the commit is stale, it may
// have an older pipeline version than the master)
jobInfo, err = pachClient.InspectJob(job.ID, false)
if err != nil {
return err
}
} else {
// get latest job state
jobInfo, err = pachClient.InspectJob(jobInfos[0].Job.ID, false)
logger.Logf("found existing job %q for output commit %q", jobInfo.Job.ID, commitInfo.Commit.ID)
if err != nil {
return err
}
}
switch {
case ppsutil.IsTerminal(jobInfo.State):
// ignore finished jobs (e.g. old pipeline & already killed)
continue
case jobInfo.PipelineVersion < a.pipelineInfo.Version:
// kill unfinished jobs from old pipelines (should generally be cleaned
// up by PPS master, but the PPS master can fail, and if these jobs
// aren't killed, future jobs will hang indefinitely waiting for their
// parents to finish)
if err := a.updateJobState(pachClient.Ctx(), jobInfo, nil,
pps.JobState_JOB_KILLED, "pipeline has been updated"); err != nil {
return fmt.Errorf("could not kill stale job: %v", err)
}
continue
case jobInfo.PipelineVersion > a.pipelineInfo.Version:
return fmt.Errorf("job %s's version (%d) greater than pipeline's "+
"version (%d), this should automatically resolve when the worker "+
"is updated", jobInfo.Job.ID, jobInfo.PipelineVersion, a.pipelineInfo.Version)
continue
}
// Now that the jobInfo is persisted, wait until all input commits are
// ready, split the input datums into chunks and merge the results of
// chunks as they're processed
if err := a.waitJob(pachClient, jobInfo, logger); err != nil {
return err
}
}
}
func (a *APIServer) spoutSpawner(pachClient *client.APIClient) error {
ctx := pachClient.Ctx()
var dir string
logger, err := a.getTaggedLogger(pachClient, "spout", nil, false)
puller := filesync.NewPuller()
if err := a.unlinkData(nil); err != nil {
return fmt.Errorf("unlinkData: %v", err)
}
// If this is our second time through the loop cleanup the old data.
if dir != "" {
if err := os.RemoveAll(dir); err != nil {
return fmt.Errorf("os.RemoveAll: %v", err)
}
}
dir, err = a.downloadData(pachClient, logger, nil, puller, &pps.ProcessStats{}, nil)
if err != nil {
return err
}
if err := a.linkData(nil, dir); err != nil {
return fmt.Errorf("linkData: %v", err)
}
err = a.runService(ctx, logger)
if err != nil {
logger.Logf("error from runService: %+v", err)
}
return nil
}
func (a *APIServer) serviceSpawner(pachClient *client.APIClient) error {
ctx := pachClient.Ctx()
commitIter, err := pachClient.SubscribeCommit(a.pipelineInfo.Pipeline.Name, a.pipelineInfo.OutputBranch, "", pfs.CommitState_READY)
if err != nil {
return err
}
defer commitIter.Close()
var serviceCtx context.Context
var serviceCancel func()
var dir string
for {
commitInfo, err := commitIter.Next()
if err != nil {
return err
}
if commitInfo.Finished != nil {
continue
}
// Create a job document matching the service's output commit
jobInput := ppsutil.JobInput(a.pipelineInfo, commitInfo)
job, err := pachClient.CreateJob(a.pipelineInfo.Pipeline.Name, commitInfo.Commit)
if err != nil {
return err
}
df, err := NewDatumFactory(pachClient, jobInput)
if err != nil {
return err
}
if df.Len() != 1 {
return fmt.Errorf("services must have a single datum")
}
data := df.Datum(0)
logger, err := a.getTaggedLogger(pachClient, job.ID, data, false)
puller := filesync.NewPuller()
// If this is our second time through the loop cleanup the old data.
if dir != "" {
if err := a.unlinkData(data); err != nil {
return fmt.Errorf("unlinkData: %v", err)
}
if err := os.RemoveAll(dir); err != nil {
return fmt.Errorf("os.RemoveAll: %v", err)
}
}
dir, err = a.downloadData(pachClient, logger, data, puller, &pps.ProcessStats{}, nil)
if err != nil {
return err
}
if err := os.MkdirAll(client.PPSInputPrefix, 0666); err != nil {
return err
}
if err := a.linkData(data, dir); err != nil {
return fmt.Errorf("linkData: %v", err)
}
if serviceCancel != nil {
serviceCancel()
}
serviceCtx, serviceCancel = context.WithCancel(ctx)
defer serviceCancel() // make go vet happy: infinite loop obviates 'defer'
go func() {
serviceCtx := serviceCtx
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(job.ID, jobPtr); err != nil {
return err
}
return ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, pps.JobState_JOB_RUNNING, "")
}); err != nil {
logger.Logf("error updating job state: %+v", err)
}
err := a.runService(serviceCtx, logger)
if err != nil {
logger.Logf("error from runService: %+v", err)
}
select {
case <-serviceCtx.Done():
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(job.ID, jobPtr); err != nil {
return err
}
return ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, pps.JobState_JOB_SUCCESS, "")
}); err != nil {
logger.Logf("error updating job progress: %+v", err)
}
if err := pachClient.FinishCommit(commitInfo.Commit.Repo.Name, commitInfo.Commit.ID); err != nil {
logger.Logf("could not finish output commit: %v", err)
}
default:
}
}()
}
}
func plusDuration(x *types.Duration, y *types.Duration) (*types.Duration, error) {
var xd time.Duration
var yd time.Duration
var err error
if x != nil {
xd, err = types.DurationFromProto(x)
if err != nil {
return nil, err
}
}
if y != nil {
yd, err = types.DurationFromProto(y)
if err != nil {
return nil, err
}
}
return types.DurationProto(xd + yd), nil
}
func (a *APIServer) chunks(jobID string) col.Collection {
return col.NewCollection(a.etcdClient, path.Join(a.etcdPrefix, chunkPrefix, jobID), nil, &ChunkState{}, nil, nil)
}
func (a *APIServer) merges(jobID string) col.Collection {
return col.NewCollection(a.etcdClient, path.Join(a.etcdPrefix, mergePrefix, jobID), nil, &MergeState{}, nil, nil)
}
func newPlan(df DatumFactory, spec *pps.ChunkSpec, parallelism int, numHashtrees int64) *Plan {
if spec == nil {
spec = &pps.ChunkSpec{}
}
if spec.Number == 0 && spec.SizeBytes == 0 {
spec.Number = int64(df.Len() / (parallelism * 10))
if spec.Number == 0 {
spec.Number = 1
}
}
plan := &Plan{}
if spec.Number != 0 {
for i := spec.Number; i < int64(df.Len()); i += spec.Number {
plan.Chunks = append(plan.Chunks, int64(i))
}
} else {
size := int64(0)
for i := 0; i < df.Len(); i++ {
for _, input := range df.Datum(i) {
size += int64(input.FileInfo.SizeBytes)
}
if size > spec.SizeBytes {
plan.Chunks = append(plan.Chunks, int64(i))
}
}
}
plan.Chunks = append(plan.Chunks, int64(df.Len()))
plan.Merges = numHashtrees
return plan
}
func (a *APIServer) failedInputs(ctx context.Context, jobInfo *pps.JobInfo) ([]string, error) {
var failedInputs []string
var vistErr error
blockCommit := func(name string, commit *pfs.Commit) {
ci, err := a.pachClient.PfsAPIClient.InspectCommit(ctx,
&pfs.InspectCommitRequest{
Commit: commit,
BlockState: pfs.CommitState_FINISHED,
})
if err != nil && vistErr == nil {
vistErr = fmt.Errorf("error blocking on commit %s/%s: %v",
commit.Repo.Name, commit.ID, err)
return
}
if ci.Tree == nil && ci.Trees == nil {
failedInputs = append(failedInputs, name)
}
}
pps.VisitInput(jobInfo.Input, func(input *pps.Input) {
if input.Pfs != nil && input.Pfs.Commit != "" {
blockCommit(input.Pfs.Name, client.NewCommit(input.Pfs.Repo, input.Pfs.Commit))
}
if input.Cron != nil && input.Cron.Commit != "" {
blockCommit(input.Cron.Name, client.NewCommit(input.Cron.Repo, input.Cron.Commit))
}
if input.Git != nil && input.Git.Commit != "" {
blockCommit(input.Git.Name, client.NewCommit(input.Git.Name, input.Git.Commit))
}
})
return failedInputs, vistErr
}
// waitJob waits for the job in 'jobInfo' to finish, and then it collects the
// output from the job's workers and merges it into a commit (and may merge
// stats into a commit in the stats branch as well)
func (a *APIServer) waitJob(pachClient *client.APIClient, jobInfo *pps.JobInfo, logger *taggedLogger) (retErr error) {
logger.Logf("waiting on job %q (pipeline version: %d, state: %s)", jobInfo.Job.ID, jobInfo.PipelineVersion, jobInfo.State)
ctx, cancel := context.WithCancel(pachClient.Ctx())
pachClient = pachClient.WithCtx(ctx)
// Watch the output commit to see if it's terminated (KILLED, FAILED, or
// SUCCESS) and if so, cancel the current context
go func() {
backoff.RetryNotify(func() error {
commitInfo, err := pachClient.PfsAPIClient.InspectCommit(ctx,
&pfs.InspectCommitRequest{
Commit: jobInfo.OutputCommit,
BlockState: pfs.CommitState_FINISHED,
})
if err != nil {
if pfsserver.IsCommitNotFoundErr(err) || pfsserver.IsCommitDeletedErr(err) {
defer cancel() // whether we return error or nil, job is done
// Output commit was deleted. Delete job as well
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
// Delete the job if no other worker has deleted it yet
jobPtr := &pps.EtcdJobInfo{}
if err := a.jobs.ReadWrite(stm).Get(jobInfo.Job.ID, jobPtr); err != nil {
return err
}
return a.deleteJob(stm, jobPtr)
}); err != nil && !col.IsErrNotFound(err) {
return err
}
return nil
}
return err
}
if commitInfo.Trees == nil {
defer cancel() // whether job state update succeeds or not, job is done
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
// Read an up to date version of the jobInfo so that we
// don't overwrite changes that have happened since this
// function started.
jobPtr := &pps.EtcdJobInfo{}
if err := a.jobs.ReadWrite(stm).Get(jobInfo.Job.ID, jobPtr); err != nil {
return err
}
if !ppsutil.IsTerminal(jobPtr.State) {
return ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, pps.JobState_JOB_KILLED, "")
}
return nil
}); err != nil {
return err
}
}
return nil
}, backoff.NewInfiniteBackOff(), func(err error, d time.Duration) error {
if isDone(ctx) {
return err // exit retry loop
}
return nil // retry again
})
}()
if jobInfo.JobTimeout != nil {
startTime, err := types.TimestampFromProto(jobInfo.Started)
if err != nil {
return err
}
timeout, err := types.DurationFromProto(jobInfo.JobTimeout)
if err != nil {
return err
}
afterTime := startTime.Add(timeout).Sub(time.Now())
logger.Logf("cancelling job at: %+v", afterTime)
timer := time.AfterFunc(afterTime, func() {
if _, err := pachClient.PfsAPIClient.FinishCommit(ctx,
&pfs.FinishCommitRequest{
Commit: jobInfo.OutputCommit,
Empty: true,
}); err != nil {
logger.Logf("error from FinishCommit while timing out job: %+v", err)
}
})
defer timer.Stop()
}
backoff.RetryNotify(func() (retErr error) {
// block until job inputs are ready
// TODO(bryce) This should be removed because it is no longer applicable.
failedInputs, err := a.failedInputs(ctx, jobInfo)
if err != nil {
return err
}
if len(failedInputs) > 0 {
reason := fmt.Sprintf("inputs %s failed", strings.Join(failedInputs, ", "))
if err := a.updateJobState(ctx, jobInfo, nil, pps.JobState_JOB_FAILURE, reason); err != nil {
return err
}
_, err := pachClient.PfsAPIClient.FinishCommit(ctx, &pfs.FinishCommitRequest{
Commit: jobInfo.OutputCommit,
Empty: true,
})
return err
}
// Create a datum factory pointing at the job's inputs and split up the
// input data into chunks
df, err := NewDatumFactory(pachClient, jobInfo.Input)
if err != nil {
return err
}
parallelism, err := ppsutil.GetExpectedNumWorkers(a.kubeClient, a.pipelineInfo.ParallelismSpec)
if err != nil {
return fmt.Errorf("error from GetExpectedNumWorkers: %v", err)
}
numHashtrees, err := ppsutil.GetExpectedNumHashtrees(a.pipelineInfo.HashtreeSpec)
if err != nil {
return fmt.Errorf("error from GetExpectedNumHashtrees: %v", err)
}
plan := &Plan{}
// Get stats commit
var statsCommit *pfs.Commit
var statsTrees []*pfs.Object
var statsSize uint64
if jobInfo.EnableStats {
ci, err := pachClient.InspectCommit(jobInfo.OutputCommit.Repo.Name, jobInfo.OutputCommit.ID)
if err != nil {
return err
}
for _, commitRange := range ci.Subvenance {
if commitRange.Lower.Repo.Name == jobInfo.OutputRepo.Name && commitRange.Upper.Repo.Name == jobInfo.OutputRepo.Name {
statsCommit = commitRange.Lower
}
}
}
// Read the job document, and either resume (if we're recovering from a
// crash) or mark it running. Also write the input chunks calculated above
// into plansCol
jobID := jobInfo.Job.ID
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(jobID, jobPtr); err != nil {
return err
}
if jobPtr.State == pps.JobState_JOB_KILLED {
return nil
}
jobPtr.DataTotal = int64(df.Len())
jobPtr.StatsCommit = statsCommit
if err := ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, pps.JobState_JOB_RUNNING, ""); err != nil {
return err
}
plansCol := a.plans.ReadWrite(stm)
if err := plansCol.Get(jobID, plan); err == nil {
return nil
}
plan = newPlan(df, jobInfo.ChunkSpec, parallelism, numHashtrees)
return plansCol.Put(jobID, plan)
}); err != nil {
return err
}
defer func() {
if retErr == nil {
if _, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
chunksCol := a.chunks(jobID).ReadWrite(stm)
chunksCol.DeleteAll()
plansCol := a.plans.ReadWrite(stm)
return plansCol.Delete(jobID)
}); err != nil {
retErr = err
}
}
}()
// Watch the chunks in order
chunks := a.chunks(jobInfo.Job.ID).ReadOnly(ctx)
var failedDatumID string
for _, high := range plan.Chunks {
chunkState := &ChunkState{}
if err := chunks.WatchOneF(fmt.Sprint(high), func(e *watch.Event) error {
var key string
if err := e.Unmarshal(&key, chunkState); err != nil {
return err
}
if key != fmt.Sprint(high) {
return nil
}
if chunkState.State != State_RUNNING {
if chunkState.State == State_FAILED {
failedDatumID = chunkState.DatumID
}
return errutil.ErrBreak
}
return nil
}); err != nil {
return err
}
}
if err := a.updateJobState(ctx, jobInfo, nil, pps.JobState_JOB_MERGING, ""); err != nil {
return err
}
var trees []*pfs.Object
var size uint64
if failedDatumID == "" || jobInfo.EnableStats {
// Wait for all merges to happen.
merges := a.merges(jobInfo.Job.ID).ReadOnly(ctx)
for merge := int64(0); merge < plan.Merges; merge++ {
mergeState := &MergeState{}
if err := merges.WatchOneF(fmt.Sprint(merge), func(e *watch.Event) error {
var key string
if err := e.Unmarshal(&key, mergeState); err != nil {
return err
}
if key != fmt.Sprint(merge) {
return nil
}
if mergeState.State != State_RUNNING {
trees = append(trees, mergeState.Tree)
size += mergeState.SizeBytes
statsTrees = append(statsTrees, mergeState.StatsTree)
statsSize += mergeState.StatsSizeBytes
return errutil.ErrBreak
}
return nil
}); err != nil {
return err
}
}
}
if jobInfo.EnableStats {
if _, err = pachClient.PfsAPIClient.FinishCommit(ctx, &pfs.FinishCommitRequest{
Commit: statsCommit,
Trees: statsTrees,
SizeBytes: statsSize,
}); err != nil {
return err
}
}
// If the job failed we finish the commit with an empty tree but only
// after we've set the state, otherwise the job will be considered
// killed.
if failedDatumID != "" {
reason := fmt.Sprintf("failed to process datum: %v", failedDatumID)
if err := a.updateJobState(ctx, jobInfo, statsCommit, pps.JobState_JOB_FAILURE, reason); err != nil {
return err
}
_, err = pachClient.PfsAPIClient.FinishCommit(ctx, &pfs.FinishCommitRequest{
Commit: jobInfo.OutputCommit,
Empty: true,
})
return err
}
// Write out the datums processed/skipped and merged for this job
buf := &bytes.Buffer{}
pbw := pbutil.NewWriter(buf)
for i := 0; i < df.Len(); i++ {
files := df.Datum(i)
datumHash := HashDatum(a.pipelineInfo.Pipeline.Name, a.pipelineInfo.Salt, files)
if _, err := pbw.WriteBytes([]byte(datumHash)); err != nil {
return err
}
}
datums, _, err := pachClient.PutObject(buf)
if err != nil {
return err
}
// Finish the job's output commit
_, err = pachClient.PfsAPIClient.FinishCommit(ctx, &pfs.FinishCommitRequest{
Commit: jobInfo.OutputCommit,
Trees: trees,
SizeBytes: size,
Datums: datums,
})
if err != nil && !pfsserver.IsCommitFinishedErr(err) {
if pfsserver.IsCommitNotFoundErr(err) || pfsserver.IsCommitDeletedErr(err) {
// output commit was deleted during e.g. FinishCommit, which means this job
// should be deleted. Goro from top of waitJob() will observe the deletion,
// delete the jobPtr and call cancel()--wait for that.
<-ctx.Done() // wait for cancel()
return nil
}
return err
}
// Handle egress
if err := a.egress(pachClient, logger, jobInfo); err != nil {
reason := fmt.Sprintf("egress error: %v", err)
return a.updateJobState(ctx, jobInfo, statsCommit, pps.JobState_JOB_FAILURE, reason)
}
return a.updateJobState(ctx, jobInfo, statsCommit, pps.JobState_JOB_SUCCESS, "")
}, backoff.NewInfiniteBackOff(), func(err error, d time.Duration) error {
logger.Logf("error in waitJob %v, retrying in %v", err, d)
select {
case <-ctx.Done():
if err := ctx.Err(); err != nil {
if err == context.DeadlineExceeded {
reason := fmt.Sprintf("job exceeded timeout (%v)", jobInfo.JobTimeout)
// Mark the job as failed.
// Workers subscribe to etcd for this state change to cancel their work
_, err := col.NewSTM(context.Background(), a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobID := jobInfo.Job.ID
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(jobID, jobPtr); err != nil {
return err
}
err = ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, pps.JobState_JOB_FAILURE, reason)
if err != nil {
return nil
}
return nil
})
if err != nil {
return err
}
}
return err
}
return err
default:
}
// Increment the job's restart count
_, err = col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobID := jobInfo.Job.ID
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(jobID, jobPtr); err != nil {
return err
}
jobPtr.Restart++
return jobs.Put(jobID, jobPtr)
})
if err != nil {
logger.Logf("error incrementing job %s's restart count", jobInfo.Job.ID)
}
return nil
})
return nil
}
func (a *APIServer) updateJobState(ctx context.Context, info *pps.JobInfo, stats *pfs.Commit, state pps.JobState, reason string) error {
_, err := col.NewSTM(ctx, a.etcdClient, func(stm col.STM) error {
jobs := a.jobs.ReadWrite(stm)
jobID := info.Job.ID
jobPtr := &pps.EtcdJobInfo{}
if err := jobs.Get(jobID, jobPtr); err != nil {
return err
}
if jobPtr.StatsCommit == nil {
jobPtr.StatsCommit = stats
}
return ppsutil.UpdateJobState(a.pipelines.ReadWrite(stm), a.jobs.ReadWrite(stm), jobPtr, state, reason)
})
return err
}
// deleteJob is identical to updateJobState, except that jobPtr points to a job
// that should be deleted rather than marked failed. Jobs may be deleted if
// their output commit is deleted.
func (a *APIServer) deleteJob(stm col.STM, jobPtr *pps.EtcdJobInfo) error {
pipelinePtr := &pps.EtcdPipelineInfo{}
if err := a.pipelines.ReadWrite(stm).Update(jobPtr.Pipeline.Name, pipelinePtr, func() error {
if pipelinePtr.JobCounts == nil {
pipelinePtr.JobCounts = make(map[int32]int32)
}
if pipelinePtr.JobCounts[int32(jobPtr.State)] != 0 {
pipelinePtr.JobCounts[int32(jobPtr.State)]--
}
return nil
}); err != nil {
return err
}
return a.jobs.ReadWrite(stm).Delete(jobPtr.Job.ID)
}
func (a *APIServer) egress(pachClient *client.APIClient, logger *taggedLogger, jobInfo *pps.JobInfo) error {
// copy the pach client (preserving auth info) so we can set a different
// number of concurrent streams
pachClient = pachClient.WithCtx(pachClient.Ctx())
pachClient.SetMaxConcurrentStreams(100)
var egressFailureCount int
return backoff.RetryNotify(func() (retErr error) {
if jobInfo.Egress != nil {
logger.Logf("Starting egress upload for job (%v)", jobInfo)
start := time.Now()
url, err := obj.ParseURL(jobInfo.Egress.URL)
if err != nil {
return err
}
objClient, err := obj.NewClientFromURLAndSecret(url, false)
if err != nil {
return err
}
if err := pfs_sync.PushObj(pachClient, jobInfo.OutputCommit, objClient, url.Object); err != nil {
return err
}
logger.Logf("Completed egress upload for job (%v), duration (%v)", jobInfo, time.Since(start))
}
return nil
}, backoff.NewInfiniteBackOff(), func(err error, d time.Duration) error {
egressFailureCount++
if egressFailureCount > 3 {
return err
}
logger.Logf("egress failed: %v; retrying in %v", err, d)
return nil
})
}
func (a *APIServer) receiveSpout(ctx context.Context, logger *taggedLogger) error {
return backoff.RetryNotify(func() error {
repo := a.pipelineInfo.Pipeline.Name
for {
// this extra closure is so that we can scope the defer
if err := func() (retErr error) {
// open a read connection to the /pfs/out named pipe
out, err := os.Open("/pfs/out")
if err != nil {
return err
}
// and close it at the end of each loop
defer func() {
if err := out.Close(); err != nil && retErr == nil {
// this lets us pass the error through if Close fails
retErr = err
}
}()
outTar := tar.NewReader(out)
// start commit
commit, err := a.pachClient.PfsAPIClient.StartCommit(a.pachClient.Ctx(), &pfs.StartCommitRequest{
Parent: client.NewCommit(repo, ""),
Branch: a.pipelineInfo.OutputBranch,
Provenance: []*pfs.CommitProvenance{client.NewCommitProvenance(ppsconsts.SpecRepo, a.pipelineInfo.OutputBranch, a.pipelineInfo.SpecCommit.ID)},
})
if err != nil {
return err
}
// finish the commit even if there was an issue
defer func() {
if err := a.pachClient.FinishCommit(repo, commit.ID); err != nil && retErr == nil {
// this lets us pass the error through if FinishCommit fails
retErr = err
}
}()
// this loops through all the files in the tar that we've read from /pfs/out
for {
fileHeader, err := outTar.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
// put files into pachyderm
if a.pipelineInfo.Spout.Overwrite {
_, err = a.pachClient.PutFileOverwrite(repo, commit.ID, fileHeader.Name, outTar, 0)
if err != nil {
return err
}
} else {
_, err = a.pachClient.PutFile(repo, commit.ID, fileHeader.Name, outTar)
if err != nil {
return err
}
}
}
return nil
}(); err != nil {
return err
}
}
}, backoff.NewInfiniteBackOff(), func(err error, d time.Duration) error {
select {
case <-ctx.Done():
return err
default:
logger.Logf("error running spout: %+v, retrying in: %+v", err, d)
return nil
}
})
}
func (a *APIServer) runService(ctx context.Context, logger *taggedLogger) error {
return backoff.RetryNotify(func() error {
// if we have a spout, then asynchronously receive spout data
if a.pipelineInfo.Spout != nil {
go a.receiveSpout(ctx, logger)
}
return a.runUserCode(ctx, logger, nil, &pps.ProcessStats{}, nil)
}, backoff.NewInfiniteBackOff(), func(err error, d time.Duration) error {
select {
case <-ctx.Done():
return err
default:
logger.Logf("error running user code: %+v, retrying in: %+v", err, d)
return nil
}
})
}
func (a *APIServer) aggregateProcessStats(stats []*pps.ProcessStats) (*pps.AggregateProcessStats, error) {
var downloadTime []float64
var processTime []float64
var uploadTime []float64
var downloadBytes []float64
var uploadBytes []float64
for _, s := range stats {
dt, err := types.DurationFromProto(s.DownloadTime)
if err != nil {
return nil, err
}
downloadTime = append(downloadTime, float64(dt))
pt, err := types.DurationFromProto(s.ProcessTime)
if err != nil {
return nil, err
}
processTime = append(processTime, float64(pt))
ut, err := types.DurationFromProto(s.UploadTime)
if err != nil {
return nil, err
}
uploadTime = append(uploadTime, float64(ut))
downloadBytes = append(downloadBytes, float64(s.DownloadBytes))
uploadBytes = append(uploadBytes, float64(s.UploadBytes))
}
dtAgg, err := a.aggregate(downloadTime)
if err != nil {
return nil, err
}
ptAgg, err := a.aggregate(processTime)
if err != nil {
return nil, err
}
utAgg, err := a.aggregate(uploadTime)
if err != nil {
return nil, err
}
dbAgg, err := a.aggregate(downloadBytes)
if err != nil {
return nil, err
}
ubAgg, err := a.aggregate(uploadBytes)
if err != nil {
return nil, err
}
return &pps.AggregateProcessStats{
DownloadTime: dtAgg,
ProcessTime: ptAgg,
UploadTime: utAgg,
DownloadBytes: dbAgg,
UploadBytes: ubAgg,
}, nil
}
func (a *APIServer) aggregate(datums []float64) (*pps.Aggregate, error) {
logger := a.getMasterLogger()
mean, err := stats.Mean(datums)
if err != nil {
logger.Logf("error aggregating mean: %v", err)
}
stddev, err := stats.StandardDeviation(datums)
if err != nil {
logger.Logf("error aggregating std dev: %v", err)
}
fifth, err := stats.Percentile(datums, 5)
if err != nil {
logger.Logf("error aggregating 5th percentile: %v", err)
}
ninetyFifth, err := stats.Percentile(datums, 95)
if err != nil {
logger.Logf("error aggregating 95th percentile: %v", err)
}
return &pps.Aggregate{
Count: int64(len(datums)),
Mean: mean,
Stddev: stddev,
FifthPercentile: fifth,
NinetyFifthPercentile: ninetyFifth,
}, nil
}
func isNotFoundErr(err error) bool {
return err != nil && strings.Contains(err.Error(), "not found")
}
func now() *types.Timestamp {