X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/a7a482db3954fa6470be74f0e00f6e1e105e0b6c..6036c55e1239281746152e85dfabbc9ed3cb6864:/lib/dispatchcloud/worker/worker.go

diff --git a/lib/dispatchcloud/worker/worker.go b/lib/dispatchcloud/worker/worker.go
index cda5a14b1a..6878bb0655 100644
--- a/lib/dispatchcloud/worker/worker.go
+++ b/lib/dispatchcloud/worker/worker.go
@@ -5,7 +5,9 @@
 package worker
 
 import (
+	"bytes"
 	"fmt"
+	"path/filepath"
 	"strings"
 	"sync"
 	"time"
@@ -41,6 +43,33 @@ var stateString = map[State]string{
 	StateShutdown: "shutdown",
 }
 
+// BootOutcome is the result of a worker boot. It is used as a label in a metric.
+type BootOutcome string
+
+const (
+	BootOutcomeFailed       BootOutcome = "failure"
+	BootOutcomeSucceeded    BootOutcome = "success"
+	BootOutcomeIdleShutdown BootOutcome = "idle shutdown"
+	BootOutcomeDisappeared  BootOutcome = "disappeared"
+)
+
+var validBootOutcomes = map[BootOutcome]bool{
+	BootOutcomeFailed:       true,
+	BootOutcomeSucceeded:    true,
+	BootOutcomeIdleShutdown: true,
+	BootOutcomeDisappeared:  true,
+}
+
+func (wkr *worker) reportBootOutcome(outcome BootOutcome) {
+	if wkr.bootOutcomeReported {
+		return
+	}
+	if wkr.wp.mBootOutcomes != nil {
+		wkr.wp.mBootOutcomes.WithLabelValues(string(outcome)).Inc()
+	}
+	wkr.bootOutcomeReported = true
+}
+
 // String implements fmt.Stringer.
 func (s State) String() string {
 	return stateString[s]
@@ -72,22 +101,23 @@ type worker struct {
 	executor Executor
 	wp       *Pool
 
-	mtx          sync.Locker // must be wp's Locker.
-	state        State
-	idleBehavior IdleBehavior
-	instance     cloud.Instance
-	instType     arvados.InstanceType
-	vcpus        int64
-	memory       int64
-	appeared     time.Time
-	probed       time.Time
-	updated      time.Time
-	busy         time.Time
-	destroyed    time.Time
-	lastUUID     string
-	running      map[string]*remoteRunner // remember to update state idle<->running when this changes
-	starting     map[string]*remoteRunner // remember to update state idle<->running when this changes
-	probing      chan struct{}
+	mtx                 sync.Locker // must be wp's Locker.
+	state               State
+	idleBehavior        IdleBehavior
+	instance            cloud.Instance
+	instType            arvados.InstanceType
+	vcpus               int64
+	memory              int64
+	appeared            time.Time
+	probed              time.Time
+	updated             time.Time
+	busy                time.Time
+	destroyed           time.Time
+	lastUUID            string
+	running             map[string]*remoteRunner // remember to update state idle<->running when this changes
+	starting            map[string]*remoteRunner // remember to update state idle<->running when this changes
+	probing             chan struct{}
+	bootOutcomeReported bool
 }
 
 func (wkr *worker) onUnkillable(uuid string) {
@@ -222,6 +252,7 @@ func (wkr *worker) probeAndUpdate() {
 	defer wkr.mtx.Unlock()
 	if reportedBroken && wkr.idleBehavior == IdleBehaviorRun {
 		logger.Info("probe reported broken instance")
+		wkr.reportBootOutcome(BootOutcomeFailed)
 		wkr.setIdleBehavior(IdleBehaviorDrain)
 	}
 	if !ok || (!booted && len(ctrUUIDs) == 0 && len(wkr.running) == 0) {
@@ -245,6 +276,7 @@ func (wkr *worker) probeAndUpdate() {
 			// some evidence about why the node never
 			// booted, even in non-debug mode.
 			if !booted {
+				wkr.reportBootOutcome(BootOutcomeFailed)
 				logger.WithFields(logrus.Fields{
 					"Duration": dur,
 					"stderr":   string(stderr),
@@ -309,6 +341,7 @@ func (wkr *worker) probeAndUpdate() {
 	}
 	wkr.updated = updateTime
 	if booted && (initialState == StateUnknown || initialState == StateBooting) {
+		wkr.reportBootOutcome(BootOutcomeSucceeded)
 		logger.WithFields(logrus.Fields{
 			"RunningContainers": len(wkr.running),
 			"State":             wkr.state,
@@ -318,7 +351,7 @@ func (wkr *worker) probeAndUpdate() {
 }
 
 func (wkr *worker) probeRunning() (running []string, reportsBroken, ok bool) {
-	cmd := "crunch-run --list"
+	cmd := wkr.wp.runnerCmd + " --list"
 	if u := wkr.instance.RemoteUser(); u != "root" {
 		cmd = "sudo " + cmd
 	}
@@ -358,9 +391,46 @@ func (wkr *worker) probeBooted() (ok bool, stderr []byte) {
 		return false, stderr
 	}
 	logger.Info("boot probe succeeded")
+	if err = wkr.wp.loadRunnerData(); err != nil {
+		wkr.logger.WithError(err).Warn("cannot boot worker: error loading runner binary")
+		return false, stderr
+	} else if len(wkr.wp.runnerData) == 0 {
+		// Assume crunch-run is already installed
+	} else if _, stderr2, err := wkr.copyRunnerData(); err != nil {
+		wkr.logger.WithError(err).WithField("stderr", string(stderr2)).Warn("error copying runner binary")
+		return false, stderr2
+	} else {
+		stderr = append(stderr, stderr2...)
+	}
 	return true, stderr
 }
 
+func (wkr *worker) copyRunnerData() (stdout, stderr []byte, err error) {
+	hash := fmt.Sprintf("%x", wkr.wp.runnerMD5)
+	dstdir, _ := filepath.Split(wkr.wp.runnerCmd)
+	logger := wkr.logger.WithFields(logrus.Fields{
+		"hash": hash,
+		"path": wkr.wp.runnerCmd,
+	})
+
+	stdout, stderr, err = wkr.executor.Execute(nil, `md5sum `+wkr.wp.runnerCmd, nil)
+	if err == nil && len(stderr) == 0 && bytes.Equal(stdout, []byte(hash+"  "+wkr.wp.runnerCmd+"\n")) {
+		logger.Info("runner binary already exists on worker, with correct hash")
+		return
+	}
+
+	// Note touch+chmod come before writing data, to avoid the
+	// possibility of md5 being correct while file mode is
+	// incorrect.
+	cmd := `set -e; dstdir="` + dstdir + `"; dstfile="` + wkr.wp.runnerCmd + `"; mkdir -p "$dstdir"; touch "$dstfile"; chmod 0755 "$dstdir" "$dstfile"; cat >"$dstfile"`
+	if wkr.instance.RemoteUser() != "root" {
+		cmd = `sudo sh -c '` + strings.Replace(cmd, "'", "'\\''", -1) + `'`
+	}
+	logger.WithField("cmd", cmd).Info("installing runner binary on worker")
+	stdout, stderr, err = wkr.executor.Execute(nil, cmd, bytes.NewReader(wkr.wp.runnerData))
+	return
+}
+
 // caller must have lock.
 func (wkr *worker) shutdownIfBroken(dur time.Duration) bool {
 	if wkr.idleBehavior == IdleBehaviorHold {
@@ -429,6 +499,7 @@ func (wkr *worker) shutdownIfIdle() bool {
 		"IdleDuration": stats.Duration(time.Since(wkr.busy)),
 		"IdleBehavior": wkr.idleBehavior,
 	}).Info("shutdown worker")
+	wkr.reportBootOutcome(BootOutcomeIdleShutdown)
 	wkr.shutdown()
 	return true
 }