1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
7 // Dispatcher service for Crunch that runs containers locally.
20 "git.arvados.org/arvados.git/lib/cmd"
21 "git.arvados.org/arvados.git/lib/config"
22 "git.arvados.org/arvados.git/sdk/go/arvados"
23 "git.arvados.org/arvados.git/sdk/go/arvadosclient"
24 "git.arvados.org/arvados.git/sdk/go/dispatch"
25 "github.com/sirupsen/logrus"
31 runningCmds map[string]*exec.Cmd
32 runningCmdsMutex sync.Mutex
33 waitGroup sync.WaitGroup
34 crunchRunCommand *string
38 logger := logrus.StandardLogger()
39 if os.Getenv("DEBUG") != "" {
40 logger.SetLevel(logrus.DebugLevel)
42 logger.Formatter = &logrus.JSONFormatter{
43 TimestampFormat: "2006-01-02T15:04:05.000000000Z07:00",
46 flags := flag.NewFlagSet("crunch-dispatch-local", flag.ExitOnError)
48 pollInterval := flags.Int(
51 "Interval in seconds to poll for queued containers")
53 crunchRunCommand = flags.String(
55 "/usr/bin/crunch-run",
56 "Crunch command to run container")
58 getVersion := flags.Bool(
61 "Print version information and exit.")
63 if ok, code := cmd.ParseFlags(flags, os.Args[0], os.Args[1:], "", os.Stderr); !ok {
67 // Print version information if requested
69 fmt.Printf("crunch-dispatch-local %s\n", version)
73 loader := config.NewLoader(nil, logger)
74 cfg, err := loader.Load()
75 cluster, err := cfg.GetCluster("")
77 fmt.Fprintf(os.Stderr, "config error: %s\n", err)
81 logger.Printf("crunch-dispatch-local %s started", version)
83 runningCmds = make(map[string]*exec.Cmd)
85 var client arvados.Client
86 client.APIHost = cluster.Services.Controller.ExternalURL.Host
87 client.AuthToken = cluster.SystemRootToken
88 client.Insecure = cluster.TLS.Insecure
90 if client.APIHost != "" || client.AuthToken != "" {
91 // Copy real configs into env vars so [a]
92 // MakeArvadosClient() uses them, and [b] they get
93 // propagated to crunch-run via SLURM.
94 os.Setenv("ARVADOS_API_HOST", client.APIHost)
95 os.Setenv("ARVADOS_API_TOKEN", client.AuthToken)
96 os.Setenv("ARVADOS_API_HOST_INSECURE", "")
98 os.Setenv("ARVADOS_API_HOST_INSECURE", "1")
100 os.Setenv("ARVADOS_EXTERNAL_CLIENT", "")
102 logger.Warnf("Client credentials missing from config, so falling back on environment variables (deprecated).")
105 arv, err := arvadosclient.MakeArvadosClient()
107 logger.Errorf("error making Arvados client: %v", err)
112 ctx, cancel := context.WithCancel(context.Background())
114 dispatcher := dispatch.Dispatcher{
117 RunContainer: (&LocalRun{startFunc, make(chan bool, 8), ctx, cluster}).run,
118 PollPeriod: time.Duration(*pollInterval) * time.Second,
121 err = dispatcher.Run(ctx)
127 c := make(chan os.Signal, 1)
128 signal.Notify(c, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT)
130 logger.Printf("Received %s, shutting down", sig)
135 runningCmdsMutex.Lock()
136 // Finished dispatching; interrupt any crunch jobs that are still running
137 for _, cmd := range runningCmds {
138 cmd.Process.Signal(os.Interrupt)
140 runningCmdsMutex.Unlock()
142 // Wait for all running crunch jobs to complete / terminate
146 func startFunc(container arvados.Container, cmd *exec.Cmd) error {
150 type LocalRun struct {
151 startCmd func(container arvados.Container, cmd *exec.Cmd) error
152 concurrencyLimit chan bool
154 cluster *arvados.Cluster
159 // If the container is Locked, start a new crunch-run process and wait until
160 // crunch-run completes. If the priority is set to zero, set an interrupt
161 // signal to the crunch-run process.
163 // If the container is in any other state, or is not Complete/Cancelled after
164 // crunch-run terminates, mark the container as Cancelled.
165 func (lr *LocalRun) run(dispatcher *dispatch.Dispatcher,
166 container arvados.Container,
167 status <-chan arvados.Container) error {
169 uuid := container.UUID
171 if container.State == dispatch.Locked {
174 case lr.concurrencyLimit <- true:
176 case <-lr.ctx.Done():
180 defer func() { <-lr.concurrencyLimit }()
184 // Check for state updates after possibly
185 // waiting to be ready-to-run
194 defer waitGroup.Done()
196 cmd := exec.Command(*crunchRunCommand, "--runtime-engine="+lr.cluster.Containers.RuntimeEngine, uuid)
198 cmd.Stderr = os.Stderr
199 cmd.Stdout = os.Stderr
201 dispatcher.Logger.Printf("starting container %v", uuid)
203 // Add this crunch job to the list of runningCmds only if we
204 // succeed in starting crunch-run.
206 runningCmdsMutex.Lock()
207 if err := lr.startCmd(container, cmd); err != nil {
208 runningCmdsMutex.Unlock()
209 dispatcher.Logger.Warnf("error starting %q for %s: %s", *crunchRunCommand, uuid, err)
210 dispatcher.UpdateState(uuid, dispatch.Cancelled)
212 runningCmds[uuid] = cmd
213 runningCmdsMutex.Unlock()
215 // Need to wait for crunch-run to exit
216 done := make(chan struct{})
219 if _, err := cmd.Process.Wait(); err != nil {
220 dispatcher.Logger.Warnf("error while waiting for crunch job to finish for %v: %q", uuid, err)
222 dispatcher.Logger.Debugf("sending done")
232 // Interrupt the child process if priority changes to 0
233 if (c.State == dispatch.Locked || c.State == dispatch.Running) && c.Priority == 0 {
234 dispatcher.Logger.Printf("sending SIGINT to pid %d to cancel container %v", cmd.Process.Pid, uuid)
235 cmd.Process.Signal(os.Interrupt)
241 dispatcher.Logger.Printf("finished container run for %v", uuid)
243 // Remove the crunch job from runningCmds
244 runningCmdsMutex.Lock()
245 delete(runningCmds, uuid)
246 runningCmdsMutex.Unlock()
252 // If the container is not finalized, then change it to "Cancelled".
253 err := dispatcher.Arv.Get("containers", uuid, nil, &container)
255 dispatcher.Logger.Warnf("error getting final container state: %v", err)
257 if container.State == dispatch.Locked || container.State == dispatch.Running {
258 dispatcher.Logger.Warnf("after %q process termination, container state for %v is %q; updating it to %q",
259 *crunchRunCommand, uuid, container.State, dispatch.Cancelled)
260 dispatcher.UpdateState(uuid, dispatch.Cancelled)
263 // drain any subsequent status changes
267 dispatcher.Logger.Printf("finalized container %v", uuid)