2 # -*- mode: perl; perl-indent-level: 2; indent-tabs-mode: nil; -*-
6 crunch-job: Execute job steps, save snapshots as requested, collate output.
10 Obtain job details from Arvados, run tasks on compute nodes (typically
11 invoked by scheduler on controller):
13 crunch-job --job x-y-z --git-dir /path/to/repo/.git
15 Obtain job details from command line, run tasks on local machine
16 (typically invoked by application or developer on VM):
18 crunch-job --job '{"script_version":"/path/to/working/tree","script":"scriptname",...}'
20 crunch-job --job '{"repository":"https://github.com/curoverse/arvados.git","script_version":"master","script":"scriptname",...}'
28 If the job is already locked, steal the lock and run it anyway.
32 Path to a .git directory (or a git URL) where the commit given in the
33 job's C<script_version> attribute is to be found. If this is I<not>
34 given, the job's C<repository> attribute will be used.
38 Arvados API authorization token to use during the course of the job.
42 Do not clear per-job/task temporary directories during initial job
43 setup. This can speed up development and debugging when running jobs
48 UUID of the job to run, or a JSON-encoded job resource without a
49 UUID. If the latter is given, a new job object will be created.
53 =head1 RUNNING JOBS LOCALLY
55 crunch-job's log messages appear on stderr along with the job tasks'
56 stderr streams. The log is saved in Keep at each checkpoint and when
59 If the job succeeds, the job's output locator is printed on stdout.
61 While the job is running, the following signals are accepted:
65 =item control-C, SIGINT, SIGQUIT
67 Save a checkpoint, terminate any job tasks that are running, and stop.
71 Save a checkpoint and continue.
75 Refresh node allocation (i.e., check whether any nodes have been added
76 or unallocated) and attributes of the Job record that should affect
77 behavior (e.g., cancel job if cancelled_at becomes non-nil).
85 use POSIX ':sys_wait_h';
86 use POSIX qw(strftime);
87 use Fcntl qw(F_GETFL F_SETFL O_NONBLOCK);
91 use Digest::MD5 qw(md5_hex);
97 use File::Path qw( make_path remove_tree );
99 use constant TASK_TEMPFAIL => 111;
100 use constant EX_TEMPFAIL => 75;
101 use constant EX_RETRY_UNLOCKED => 93;
103 $ENV{"TMPDIR"} ||= "/tmp";
104 unless (defined $ENV{"CRUNCH_TMP"}) {
105 $ENV{"CRUNCH_TMP"} = $ENV{"TMPDIR"} . "/crunch-job";
106 if ($ENV{"USER"} ne "crunch" && $< != 0) {
107 # use a tmp dir unique for my uid
108 $ENV{"CRUNCH_TMP"} .= "-$<";
112 # Create the tmp directory if it does not exist
113 if ( ! -d $ENV{"CRUNCH_TMP"} ) {
114 make_path $ENV{"CRUNCH_TMP"} or die "Failed to create temporary working directory: " . $ENV{"CRUNCH_TMP"};
117 $ENV{"JOB_WORK"} = $ENV{"CRUNCH_TMP"} . "/work";
118 $ENV{"CRUNCH_INSTALL"} = "$ENV{CRUNCH_TMP}/opt";
119 $ENV{"CRUNCH_WORK"} = $ENV{"JOB_WORK"}; # deprecated
120 mkdir ($ENV{"JOB_WORK"});
129 my $docker_bin = "/usr/bin/docker.io";
130 GetOptions('force-unlock' => \$force_unlock,
131 'git-dir=s' => \$git_dir,
132 'job=s' => \$jobspec,
133 'job-api-token=s' => \$job_api_token,
134 'no-clear-tmp' => \$no_clear_tmp,
135 'resume-stash=s' => \$resume_stash,
136 'docker-bin=s' => \$docker_bin,
139 if (defined $job_api_token) {
140 $ENV{ARVADOS_API_TOKEN} = $job_api_token;
143 my $have_slurm = exists $ENV{SLURM_JOB_ID} && exists $ENV{SLURM_NODELIST};
148 $main::ENV{CRUNCH_DEBUG} = 1;
152 $main::ENV{CRUNCH_DEBUG} = 0;
155 my $arv = Arvados->new('apiVersion' => 'v1');
164 if ($jobspec =~ /^[-a-z\d]+$/)
166 # $jobspec is an Arvados UUID, not a JSON job specification
167 $Job = api_call("jobs/get", uuid => $jobspec);
172 $Job = JSON::decode_json($jobspec);
177 # Make sure our workers (our slurm nodes, localhost, or whatever) are
178 # at least able to run basic commands: they aren't down or severely
181 if ($Job->{docker_image_locator}) {
182 $cmd = [$docker_bin, 'ps', '-q'];
184 Log(undef, "Sanity check is `@$cmd`");
185 srun(["srun", "--nodes=\Q$ENV{SLURM_NNODES}\E", "--ntasks-per-node=1"],
189 Log(undef, "Sanity check failed: ".exit_status_s($?));
192 Log(undef, "Sanity check OK");
195 my $User = api_call("users/current");
198 if (!$force_unlock) {
199 # Claim this job, and make sure nobody else does
200 eval { api_call("jobs/lock", uuid => $Job->{uuid}); };
202 Log(undef, "Error while locking job, exiting ".EX_TEMPFAIL);
211 map { croak ("No $_ specified") unless $Job->{$_} }
212 qw(script script_version script_parameters);
215 $Job->{'is_locked_by_uuid'} = $User->{'uuid'};
216 $Job->{'started_at'} = gmtime;
217 $Job->{'state'} = 'Running';
219 $Job = api_call("jobs/create", job => $Job);
221 $job_id = $Job->{'uuid'};
223 my $keep_logfile = $job_id . '.log.txt';
224 log_writer_start($keep_logfile);
226 $Job->{'runtime_constraints'} ||= {};
227 $Job->{'runtime_constraints'}->{'max_tasks_per_node'} ||= 0;
228 my $max_ncpus = $Job->{'runtime_constraints'}->{'max_tasks_per_node'};
230 my $gem_versions = `gem list --quiet arvados-cli 2>/dev/null`;
232 $gem_versions =~ s/^arvados-cli \(/ with arvados-cli Gem version(s) /;
233 chomp($gem_versions);
234 chop($gem_versions); # Closing parentheses
239 "running from " . ((-e $0) ? realpath($0) : "stdin") . $gem_versions);
241 Log (undef, "check slurm allocation");
244 # Should use $ENV{SLURM_TASKS_PER_NODE} instead of sinfo? (eg. "4(x3),2,4(x2)")
248 my $localcpus = 0 + `grep -cw ^processor /proc/cpuinfo` || 1;
249 push @sinfo, "$localcpus localhost";
251 if (exists $ENV{SLURM_NODELIST})
253 push @sinfo, `sinfo -h --format='%c %N' --nodes=\Q$ENV{SLURM_NODELIST}\E`;
257 my ($ncpus, $slurm_nodelist) = split;
258 $ncpus = $max_ncpus if $max_ncpus && $ncpus > $max_ncpus;
261 while ($slurm_nodelist =~ s/^([^\[,]+?(\[.*?\])?)(,|$)//)
264 if ($nodelist =~ /\[((\d+)(-(\d+))?(,(\d+)(-(\d+))?)*)\]/)
267 foreach (split (",", $ranges))
280 push @nodelist, map {
282 $n =~ s/\[[-,\d]+\]/$_/;
289 push @nodelist, $nodelist;
292 foreach my $nodename (@nodelist)
294 Log (undef, "node $nodename - $ncpus slots");
295 my $node = { name => $nodename,
299 foreach my $cpu (1..$ncpus)
301 push @slot, { node => $node,
305 push @node, @nodelist;
310 # Ensure that we get one jobstep running on each allocated node before
311 # we start overloading nodes with concurrent steps
313 @slot = sort { $a->{cpu} <=> $b->{cpu} } @slot;
316 $Job->update_attributes(
317 'tasks_summary' => { 'failed' => 0,
322 Log (undef, "start");
323 $SIG{'INT'} = sub { $main::please_freeze = 1; };
324 $SIG{'QUIT'} = sub { $main::please_freeze = 1; };
325 $SIG{'TERM'} = \&croak;
326 $SIG{'TSTP'} = sub { $main::please_freeze = 1; };
327 $SIG{'ALRM'} = sub { $main::please_info = 1; };
328 $SIG{'CONT'} = sub { $main::please_continue = 1; };
329 $SIG{'HUP'} = sub { $main::please_refresh = 1; };
331 $main::please_freeze = 0;
332 $main::please_info = 0;
333 $main::please_continue = 0;
334 $main::please_refresh = 0;
335 my $jobsteps_must_output_keys = 0; # becomes 1 when any task outputs a key
337 grep { $ENV{$1} = $2 if /^(NOCACHE.*?)=(.*)/ } split ("\n", $$Job{knobs});
338 $ENV{"CRUNCH_JOB_UUID"} = $job_id;
339 $ENV{"JOB_UUID"} = $job_id;
342 my @jobstep_todo = ();
343 my @jobstep_done = ();
344 my @jobstep_tomerge = ();
345 my $jobstep_tomerge_level = 0;
346 my $squeue_checked = 0;
347 my $latest_refresh = scalar time;
351 if (defined $Job->{thawedfromkey})
353 thaw ($Job->{thawedfromkey});
357 my $first_task = api_call("job_tasks/create", job_task => {
358 'job_uuid' => $Job->{'uuid'},
363 push @jobstep, { 'level' => 0,
365 'arvados_task' => $first_task,
367 push @jobstep_todo, 0;
373 must_lock_now("$ENV{CRUNCH_TMP}/.lock", "a job is already running here.");
376 my $build_script = handle_readall(\*DATA);
377 my $nodelist = join(",", @node);
378 my $git_tar_count = 0;
380 if (!defined $no_clear_tmp) {
381 # Clean out crunch_tmp/work, crunch_tmp/opt, crunch_tmp/src*
382 Log (undef, "Clean work dirs");
384 my $cleanpid = fork();
387 # Find FUSE mounts that look like Keep mounts (the mount path has the
388 # word "keep") and unmount them. Then clean up work directories.
389 # TODO: When #5036 is done and widely deployed, we can get rid of the
390 # regular expression and just unmount everything with type fuse.keep.
391 srun (["srun", "--nodelist=$nodelist", "-D", $ENV{'TMPDIR'}],
392 ['bash', '-ec', 'mount -t fuse,fuse.keep | awk \'($3 ~ /\ykeep\y/){print $3}\' | xargs -r -n 1 fusermount -u -z; sleep 1; rm -rf $JOB_WORK $CRUNCH_INSTALL $CRUNCH_TMP/task $CRUNCH_TMP/src* $CRUNCH_TMP/*.cid']);
397 last if $cleanpid == waitpid (-1, WNOHANG);
398 freeze_if_want_freeze ($cleanpid);
399 select (undef, undef, undef, 0.1);
401 Log (undef, "Cleanup command exited ".exit_status_s($?));
404 # If this job requires a Docker image, install that.
405 my ($docker_locator, $docker_stream, $docker_hash, $docker_limitmem);
406 if ($docker_locator = $Job->{docker_image_locator}) {
407 ($docker_stream, $docker_hash) = find_docker_image($docker_locator);
410 croak("No Docker image hash found from locator $docker_locator");
412 $docker_stream =~ s/^\.//;
413 my $docker_install_script = qq{
414 if ! $docker_bin images -q --no-trunc --all | grep -qxF \Q$docker_hash\E; then
415 arv-get \Q$docker_locator$docker_stream/$docker_hash.tar\E | $docker_bin load
418 my $docker_pid = fork();
419 if ($docker_pid == 0)
421 srun (["srun", "--nodelist=" . join(',', @node)],
422 ["/bin/sh", "-ec", $docker_install_script]);
427 last if $docker_pid == waitpid (-1, WNOHANG);
428 freeze_if_want_freeze ($docker_pid);
429 select (undef, undef, undef, 0.1);
433 croak("Installing Docker image from $docker_locator exited "
437 # Determine whether this version of Docker supports memory+swap limits.
438 srun(["srun", "--nodelist=" . $node[0]],
439 ["/bin/sh", "-ec", "$docker_bin run --help | grep -qe --memory-swap="],
441 $docker_limitmem = ($? == 0);
443 if ($Job->{arvados_sdk_version}) {
444 # The job also specifies an Arvados SDK version. Add the SDKs to the
445 # tar file for the build script to install.
446 Log(undef, sprintf("Packing Arvados SDK version %s for installation",
447 $Job->{arvados_sdk_version}));
448 add_git_archive("git", "--git-dir=$git_dir", "archive",
449 "--prefix=.arvados.sdk/",
450 $Job->{arvados_sdk_version}, "sdk");
454 if (!defined $git_dir && $Job->{'script_version'} =~ m{^/}) {
455 # If script_version looks like an absolute path, *and* the --git-dir
456 # argument was not given -- which implies we were not invoked by
457 # crunch-dispatch -- we will use the given path as a working
458 # directory instead of resolving script_version to a git commit (or
459 # doing anything else with git).
460 $ENV{"CRUNCH_SRC_COMMIT"} = $Job->{'script_version'};
461 $ENV{"CRUNCH_SRC"} = $Job->{'script_version'};
464 # Resolve the given script_version to a git commit sha1. Also, if
465 # the repository is remote, clone it into our local filesystem: this
466 # ensures "git archive" will work, and is necessary to reliably
467 # resolve a symbolic script_version like "master^".
468 $ENV{"CRUNCH_SRC"} = "$ENV{CRUNCH_TMP}/src";
470 Log (undef, "Looking for version ".$Job->{script_version}." from repository ".$Job->{repository});
472 $ENV{"CRUNCH_SRC_COMMIT"} = $Job->{script_version};
474 # If we're running under crunch-dispatch, it will have already
475 # pulled the appropriate source tree into its own repository, and
476 # given us that repo's path as $git_dir.
478 # If we're running a "local" job, we might have to fetch content
479 # from a remote repository.
481 # (Currently crunch-dispatch gives a local path with --git-dir, but
482 # we might as well accept URLs there too in case it changes its
484 my $repo = $git_dir || $Job->{'repository'};
486 # Repository can be remote or local. If remote, we'll need to fetch it
487 # to a local dir before doing `git log` et al.
490 if ($repo =~ m{://|^[^/]*:}) {
491 # $repo is a git url we can clone, like git:// or https:// or
492 # file:/// or [user@]host:repo.git. Note "user/name@host:foo" is
493 # not recognized here because distinguishing that from a local
494 # path is too fragile. If you really need something strange here,
495 # use the ssh:// form.
496 $repo_location = 'remote';
497 } elsif ($repo =~ m{^\.*/}) {
498 # $repo is a local path to a git index. We'll also resolve ../foo
499 # to ../foo/.git if the latter is a directory. To help
500 # disambiguate local paths from named hosted repositories, this
501 # form must be given as ./ or ../ if it's a relative path.
502 if (-d "$repo/.git") {
503 $repo = "$repo/.git";
505 $repo_location = 'local';
507 # $repo is none of the above. It must be the name of a hosted
509 my $arv_repo_list = api_call("repositories/list",
510 'filters' => [['name','=',$repo]]);
511 my @repos_found = @{$arv_repo_list->{'items'}};
512 my $n_found = $arv_repo_list->{'serverResponse'}->{'items_available'};
514 Log(undef, "Repository '$repo' -> "
515 . join(", ", map { $_->{'uuid'} } @repos_found));
518 croak("Error: Found $n_found repositories with name '$repo'.");
520 $repo = $repos_found[0]->{'fetch_url'};
521 $repo_location = 'remote';
523 Log(undef, "Using $repo_location repository '$repo'");
524 $ENV{"CRUNCH_SRC_URL"} = $repo;
526 # Resolve given script_version (we'll call that $treeish here) to a
527 # commit sha1 ($commit).
528 my $treeish = $Job->{'script_version'};
530 if ($repo_location eq 'remote') {
531 # We minimize excess object-fetching by re-using the same bare
532 # repository in CRUNCH_TMP/.git for multiple crunch-jobs -- we
533 # just keep adding remotes to it as needed.
534 my $local_repo = $ENV{'CRUNCH_TMP'}."/.git";
535 my $gitcmd = "git --git-dir=\Q$local_repo\E";
537 # Set up our local repo for caching remote objects, making
539 if (!-d $local_repo) {
540 make_path($local_repo) or croak("Error: could not create $local_repo");
542 # This works (exits 0 and doesn't delete fetched objects) even
543 # if $local_repo is already initialized:
544 `$gitcmd init --bare`;
546 croak("Error: $gitcmd init --bare exited ".exit_status_s($?));
549 # If $treeish looks like a hash (or abbrev hash) we look it up in
550 # our local cache first, since that's cheaper. (We don't want to
551 # do that with tags/branches though -- those change over time, so
552 # they should always be resolved by the remote repo.)
553 if ($treeish =~ /^[0-9a-f]{7,40}$/s) {
554 # Hide stderr because it's normal for this to fail:
555 my $sha1 = `$gitcmd rev-list -n1 ''\Q$treeish\E 2>/dev/null`;
557 # Careful not to resolve a branch named abcdeff to commit 1234567:
558 $sha1 =~ /^$treeish/ &&
559 $sha1 =~ /^([0-9a-f]{40})$/s) {
561 Log(undef, "Commit $commit already present in $local_repo");
565 if (!defined $commit) {
566 # If $treeish isn't just a hash or abbrev hash, or isn't here
567 # yet, we need to fetch the remote to resolve it correctly.
569 # First, remove all local heads. This prevents a name that does
570 # not exist on the remote from resolving to (or colliding with)
571 # a previously fetched branch or tag (possibly from a different
573 remove_tree("$local_repo/refs/heads", {keep_root => 1});
575 Log(undef, "Fetching objects from $repo to $local_repo");
576 `$gitcmd fetch --no-progress --tags ''\Q$repo\E \Q+refs/heads/*:refs/heads/*\E`;
578 croak("Error: `$gitcmd fetch` exited ".exit_status_s($?));
582 # Now that the data is all here, we will use our local repo for
583 # the rest of our git activities.
587 my $gitcmd = "git --git-dir=\Q$repo\E";
588 my $sha1 = `$gitcmd rev-list -n1 ''\Q$treeish\E`;
589 unless ($? == 0 && $sha1 =~ /^([0-9a-f]{40})$/) {
590 croak("`$gitcmd rev-list` exited "
592 .", '$treeish' not found. Giving up.");
595 Log(undef, "Version $treeish is commit $commit");
597 if ($commit ne $Job->{'script_version'}) {
598 # Record the real commit id in the database, frozentokey, logs,
599 # etc. -- instead of an abbreviation or a branch name which can
600 # become ambiguous or point to a different commit in the future.
601 if (!$Job->update_attributes('script_version' => $commit)) {
602 croak("Error: failed to update job's script_version attribute");
606 $ENV{"CRUNCH_SRC_COMMIT"} = $commit;
607 add_git_archive("$gitcmd archive ''\Q$commit\E");
610 my $git_archive = combined_git_archive();
611 if (!defined $git_archive) {
612 Log(undef, "Skip install phase (no git archive)");
614 Log(undef, "Warning: This probably means workers have no source tree!");
619 my $install_script_tries_left = 3;
620 for (my $attempts = 0; $attempts < 3; $attempts++) {
621 Log(undef, "Run install script on all workers");
623 my @srunargs = ("srun",
624 "--nodelist=$nodelist",
625 "-D", $ENV{'TMPDIR'}, "--job-name=$job_id");
626 my @execargs = ("sh", "-c",
627 "mkdir -p $ENV{CRUNCH_INSTALL} && cd $ENV{CRUNCH_TMP} && perl -");
629 $ENV{"CRUNCH_GIT_ARCHIVE_HASH"} = md5_hex($git_archive);
630 my ($install_stderr_r, $install_stderr_w);
631 pipe $install_stderr_r, $install_stderr_w or croak("pipe() failed: $!");
632 set_nonblocking($install_stderr_r);
633 my $installpid = fork();
634 if ($installpid == 0)
636 close($install_stderr_r);
637 fcntl($install_stderr_w, F_SETFL, 0) or croak($!); # no close-on-exec
638 open(STDOUT, ">&", $install_stderr_w);
639 open(STDERR, ">&", $install_stderr_w);
640 srun (\@srunargs, \@execargs, {}, $build_script . $git_archive);
643 close($install_stderr_w);
644 # Tell freeze_if_want_freeze how to kill the child, otherwise the
645 # "waitpid(installpid)" loop won't get interrupted by a freeze:
646 $proc{$installpid} = {};
648 # Track whether anything appears on stderr other than slurm errors
649 # ("srun: ...") and the "starting: ..." message printed by the
650 # srun subroutine itself:
651 my $stderr_anything_from_script = 0;
652 my $match_our_own_errors = '^(srun: error: |starting: \[)';
653 while ($installpid != waitpid(-1, WNOHANG)) {
654 freeze_if_want_freeze ($installpid);
655 # Wait up to 0.1 seconds for something to appear on stderr, then
656 # do a non-blocking read.
657 my $bits = fhbits($install_stderr_r);
658 select ($bits, undef, $bits, 0.1);
659 if (0 < sysread ($install_stderr_r, $stderr_buf, 8192, length($stderr_buf)))
661 while ($stderr_buf =~ /^(.*?)\n/) {
663 substr $stderr_buf, 0, 1+length($line), "";
664 Log(undef, "stderr $line");
665 if ($line !~ /$match_our_own_errors/) {
666 $stderr_anything_from_script = 1;
671 delete $proc{$installpid};
672 $install_exited = $?;
673 close($install_stderr_r);
674 if (length($stderr_buf) > 0) {
675 if ($stderr_buf !~ /$match_our_own_errors/) {
676 $stderr_anything_from_script = 1;
678 Log(undef, "stderr $stderr_buf")
681 Log (undef, "Install script exited ".exit_status_s($install_exited));
682 last if $install_exited == 0 || $main::please_freeze;
683 # If the install script fails but doesn't print an error message,
684 # the next thing anyone is likely to do is just run it again in
685 # case it was a transient problem like "slurm communication fails
686 # because the network isn't reliable enough". So we'll just do
687 # that ourselves (up to 3 attempts in total). OTOH, if there is an
688 # error message, the problem is more likely to have a real fix and
689 # we should fail the job so the fixing process can start, instead
690 # of doing 2 more attempts.
691 last if $stderr_anything_from_script;
694 foreach my $tar_filename (map { tar_filename_n($_); } (1..$git_tar_count)) {
695 unlink($tar_filename);
698 if ($install_exited != 0) {
703 foreach (qw (script script_version script_parameters runtime_constraints))
707 (ref($Job->{$_}) ? JSON::encode_json($Job->{$_}) : $Job->{$_}));
709 foreach (split (/\n/, $Job->{knobs}))
711 Log (undef, "knob " . $_);
716 $main::success = undef;
722 my $thisround_succeeded = 0;
723 my $thisround_failed = 0;
724 my $thisround_failed_multiple = 0;
725 my $working_slot_count = scalar(@slot);
727 @jobstep_todo = sort { $jobstep[$a]->{level} <=> $jobstep[$b]->{level}
728 or $a <=> $b } @jobstep_todo;
729 my $level = $jobstep[$jobstep_todo[0]]->{level};
731 my $initial_tasks_this_level = 0;
732 foreach my $id (@jobstep_todo) {
733 $initial_tasks_this_level++ if ($jobstep[$id]->{level} == $level);
736 # If the number of tasks scheduled at this level #T is smaller than the number
737 # of slots available #S, only use the first #T slots, or the first slot on
738 # each node, whichever number is greater.
740 # When we dispatch tasks later, we'll allocate whole-node resources like RAM
741 # based on these numbers. Using fewer slots makes more resources available
742 # to each individual task, which should normally be a better strategy when
743 # there are fewer of them running with less parallelism.
745 # Note that this calculation is not redone if the initial tasks at
746 # this level queue more tasks at the same level. This may harm
747 # overall task throughput for that level.
749 if ($initial_tasks_this_level < @node) {
750 @freeslot = (0..$#node);
751 } elsif ($initial_tasks_this_level < @slot) {
752 @freeslot = (0..$initial_tasks_this_level - 1);
754 @freeslot = (0..$#slot);
756 my $round_num_freeslots = scalar(@freeslot);
758 my %round_max_slots = ();
759 for (my $ii = $#freeslot; $ii >= 0; $ii--) {
760 my $this_slot = $slot[$freeslot[$ii]];
761 my $node_name = $this_slot->{node}->{name};
762 $round_max_slots{$node_name} ||= $this_slot->{cpu};
763 last if (scalar(keys(%round_max_slots)) >= @node);
766 Log(undef, "start level $level with $round_num_freeslots slots");
769 my $progress_is_dirty = 1;
770 my $progress_stats_updated = 0;
772 update_progress_stats();
776 for (my $todo_ptr = 0; $todo_ptr <= $#jobstep_todo; $todo_ptr ++)
778 my $id = $jobstep_todo[$todo_ptr];
779 my $Jobstep = $jobstep[$id];
780 if ($Jobstep->{level} != $level)
785 pipe $reader{$id}, "writer" or croak("pipe() failed: $!");
786 set_nonblocking($reader{$id});
788 my $childslot = $freeslot[0];
789 my $childnode = $slot[$childslot]->{node};
790 my $childslotname = join (".",
791 $slot[$childslot]->{node}->{name},
792 $slot[$childslot]->{cpu});
794 my $childpid = fork();
797 $SIG{'INT'} = 'DEFAULT';
798 $SIG{'QUIT'} = 'DEFAULT';
799 $SIG{'TERM'} = 'DEFAULT';
801 foreach (values (%reader))
805 fcntl ("writer", F_SETFL, 0) or croak ($!); # no close-on-exec
806 open(STDOUT,">&writer");
807 open(STDERR,">&writer");
812 delete $ENV{"GNUPGHOME"};
813 $ENV{"TASK_UUID"} = $Jobstep->{'arvados_task'}->{'uuid'};
814 $ENV{"TASK_QSEQUENCE"} = $id;
815 $ENV{"TASK_SEQUENCE"} = $level;
816 $ENV{"JOB_SCRIPT"} = $Job->{script};
817 while (my ($param, $value) = each %{$Job->{script_parameters}}) {
818 $param =~ tr/a-z/A-Z/;
819 $ENV{"JOB_PARAMETER_$param"} = $value;
821 $ENV{"TASK_SLOT_NODE"} = $slot[$childslot]->{node}->{name};
822 $ENV{"TASK_SLOT_NUMBER"} = $slot[$childslot]->{cpu};
823 $ENV{"TASK_WORK"} = $ENV{"CRUNCH_TMP"}."/task/$childslotname";
824 $ENV{"HOME"} = $ENV{"TASK_WORK"};
825 $ENV{"TASK_KEEPMOUNT"} = $ENV{"TASK_WORK"}.".keep";
826 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
827 $ENV{"CRUNCH_NODE_SLOTS"} = $round_max_slots{$ENV{TASK_SLOT_NODE}};
828 $ENV{"PATH"} = $ENV{"CRUNCH_INSTALL"} . "/bin:" . $ENV{"PATH"};
834 "--nodelist=".$childnode->{name},
835 qw(-n1 -c1 -N1 -D), $ENV{'TMPDIR'},
836 "--job-name=$job_id.$id.$$",
839 "if [ -e $ENV{TASK_WORK} ]; then rm -rf $ENV{TASK_WORK}; fi; "
840 ."mkdir -p $ENV{CRUNCH_TMP} $ENV{JOB_WORK} $ENV{TASK_WORK} $ENV{TASK_KEEPMOUNT} "
841 ."&& cd $ENV{CRUNCH_TMP} "
842 # These environment variables get used explicitly later in
843 # $command. No tool is expected to read these values directly.
844 .q{&& MEM=$(awk '($1 == "MemTotal:"){print $2}' </proc/meminfo) }
845 .q{&& SWAP=$(awk '($1 == "SwapTotal:"){print $2}' </proc/meminfo) }
846 ."&& MEMLIMIT=\$(( (\$MEM * 95) / ($ENV{CRUNCH_NODE_SLOTS} * 100) )) "
847 ."&& let SWAPLIMIT=\$MEMLIMIT+\$SWAP ";
848 $command .= "&& exec arv-mount --by-id --allow-other $ENV{TASK_KEEPMOUNT} --exec ";
851 my $cidfile = "$ENV{CRUNCH_TMP}/$Jobstep->{arvados_task}->{uuid}-$Jobstep->{failures}.cid";
852 $command .= "crunchstat -cgroup-root=/sys/fs/cgroup -cgroup-parent=docker -cgroup-cid=$cidfile -poll=10000 ";
853 $command .= "$docker_bin run --rm=true --attach=stdout --attach=stderr --attach=stdin -i --user=crunch --cidfile=$cidfile --sig-proxy ";
854 # We only set memory limits if Docker lets us limit both memory and swap.
855 # Memory limits alone have been supported longer, but subprocesses tend
856 # to get SIGKILL if they exceed that without any swap limit set.
857 # See #5642 for additional background.
858 if ($docker_limitmem) {
859 $command .= "--memory=\${MEMLIMIT}k --memory-swap=\${SWAPLIMIT}k ";
862 # Dynamically configure the container to use the host system as its
863 # DNS server. Get the host's global addresses from the ip command,
864 # and turn them into docker --dns options using gawk.
866 q{$(ip -o address show scope global |
867 gawk 'match($4, /^([0-9\.:]+)\//, x){print "--dns", x[1]}') };
869 # The source tree and $destdir directory (which we have
870 # installed on the worker host) are available in the container,
871 # under the same path.
872 $command .= "--volume=\Q$ENV{CRUNCH_SRC}:$ENV{CRUNCH_SRC}:ro\E ";
873 $command .= "--volume=\Q$ENV{CRUNCH_INSTALL}:$ENV{CRUNCH_INSTALL}:ro\E ";
875 # Currently, we make arv-mount's mount point appear at /keep
876 # inside the container (instead of using the same path as the
877 # host like we do with CRUNCH_SRC and CRUNCH_INSTALL). However,
878 # crunch scripts and utilities must not rely on this. They must
879 # use $TASK_KEEPMOUNT.
880 $command .= "--volume=\Q$ENV{TASK_KEEPMOUNT}:/keep:ro\E ";
881 $ENV{TASK_KEEPMOUNT} = "/keep";
883 # TASK_WORK is almost exactly like a docker data volume: it
884 # starts out empty, is writable, and persists until no
885 # containers use it any more. We don't use --volumes-from to
886 # share it with other containers: it is only accessible to this
887 # task, and it goes away when this task stops.
889 # However, a docker data volume is writable only by root unless
890 # the mount point already happens to exist in the container with
891 # different permissions. Therefore, we [1] assume /tmp already
892 # exists in the image and is writable by the crunch user; [2]
893 # avoid putting TASK_WORK inside CRUNCH_TMP (which won't be
894 # writable if they are created by docker while setting up the
895 # other --volumes); and [3] create $TASK_WORK inside the
896 # container using $build_script.
897 $command .= "--volume=/tmp ";
898 $ENV{"TASK_WORK"} = "/tmp/crunch-job-task-work/$childslotname";
899 $ENV{"HOME"} = $ENV{"TASK_WORK"};
900 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
902 # TODO: Share a single JOB_WORK volume across all task
903 # containers on a given worker node, and delete it when the job
904 # ends (and, in case that doesn't work, when the next job
907 # For now, use the same approach as TASK_WORK above.
908 $ENV{"JOB_WORK"} = "/tmp/crunch-job-work";
910 while (my ($env_key, $env_val) = each %ENV)
912 if ($env_key =~ /^(ARVADOS|CRUNCH|JOB|TASK)_/) {
913 $command .= "--env=\Q$env_key=$env_val\E ";
916 $command .= "--env=\QHOME=$ENV{HOME}\E ";
917 $command .= "\Q$docker_hash\E ";
918 $command .= "stdbuf --output=0 --error=0 ";
919 $command .= "perl - $ENV{CRUNCH_SRC}/crunch_scripts/" . $Job->{"script"};
922 $command .= "crunchstat -cgroup-root=/sys/fs/cgroup -poll=10000 ";
923 $command .= "stdbuf --output=0 --error=0 ";
924 $command .= "perl - $ENV{CRUNCH_SRC}/crunch_scripts/" . $Job->{"script"};
927 my @execargs = ('bash', '-c', $command);
928 srun (\@srunargs, \@execargs, undef, $build_script);
929 # exec() failed, we assume nothing happened.
930 die "srun() failed on build script\n";
933 if (!defined $childpid)
940 $proc{$childpid} = { jobstep => $id,
943 jobstepname => "$job_id.$id.$childpid",
945 croak ("assert failed: \$slot[$childslot]->{'pid'} exists") if exists $slot[$childslot]->{pid};
946 $slot[$childslot]->{pid} = $childpid;
948 Log ($id, "job_task ".$Jobstep->{'arvados_task'}->{'uuid'});
949 Log ($id, "child $childpid started on $childslotname");
950 $Jobstep->{starttime} = time;
951 $Jobstep->{node} = $childnode->{name};
952 $Jobstep->{slotindex} = $childslot;
953 delete $Jobstep->{stderr};
954 delete $Jobstep->{finishtime};
956 $Jobstep->{'arvados_task'}->{started_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{starttime});
957 $Jobstep->{'arvados_task'}->save;
959 splice @jobstep_todo, $todo_ptr, 1;
962 $progress_is_dirty = 1;
966 ($round_num_freeslots > @freeslot && $todo_ptr+1 > $#jobstep_todo))
968 last THISROUND if $main::please_freeze || defined($main::success);
969 if ($main::please_info)
971 $main::please_info = 0;
973 create_output_collection();
975 update_progress_stats();
982 check_refresh_wanted();
984 update_progress_stats();
985 select (undef, undef, undef, 0.1);
987 elsif (time - $progress_stats_updated >= 30)
989 update_progress_stats();
991 $working_slot_count = scalar(grep { $_->{node}->{losing_streak} == 0 &&
992 $_->{node}->{hold_count} < 4 } @slot);
993 if (($thisround_failed_multiple >= 8 && $thisround_succeeded == 0) ||
994 ($thisround_failed_multiple >= 16 && $thisround_failed_multiple > $thisround_succeeded))
996 my $message = "Repeated failure rate too high ($thisround_failed_multiple/"
997 .($thisround_failed+$thisround_succeeded)
998 .") -- giving up on this round";
999 Log (undef, $message);
1003 # move slots from freeslot to holdslot (or back to freeslot) if necessary
1004 for (my $i=$#freeslot; $i>=0; $i--) {
1005 if ($slot[$freeslot[$i]]->{node}->{hold_until} > scalar time) {
1006 push @holdslot, (splice @freeslot, $i, 1);
1009 for (my $i=$#holdslot; $i>=0; $i--) {
1010 if ($slot[$holdslot[$i]]->{node}->{hold_until} <= scalar time) {
1011 push @freeslot, (splice @holdslot, $i, 1);
1015 # give up if no nodes are succeeding
1016 if ($working_slot_count < 1) {
1017 Log(undef, "Every node has failed -- giving up");
1024 push @freeslot, splice @holdslot;
1025 map { $slot[$freeslot[$_]]->{node}->{losing_streak} = 0 } (0..$#freeslot);
1028 Log (undef, "wait for last ".(scalar keys %proc)." children to finish");
1031 if ($main::please_continue) {
1032 $main::please_continue = 0;
1035 $main::please_info = 0, freeze(), create_output_collection(), save_meta(1) if $main::please_info;
1037 if (!reapchildren())
1039 check_refresh_wanted();
1041 update_progress_stats();
1042 select (undef, undef, undef, 0.1);
1043 killem (keys %proc) if $main::please_freeze;
1047 update_progress_stats();
1048 freeze_if_want_freeze();
1051 if (!defined $main::success)
1053 if (!@jobstep_todo) {
1055 } elsif ($working_slot_count < 1) {
1057 exit(EX_RETRY_UNLOCKED);
1058 } elsif ($thisround_succeeded == 0 &&
1059 ($thisround_failed == 0 || $thisround_failed > 4)) {
1060 my $message = "stop because $thisround_failed tasks failed and none succeeded";
1061 Log (undef, $message);
1066 goto ONELEVEL if !defined $main::success;
1069 release_allocation();
1071 my $collated_output = &create_output_collection();
1073 if (!$collated_output) {
1074 Log (undef, "Failed to write output collection");
1077 Log(undef, "job output $collated_output");
1078 $Job->update_attributes('output' => $collated_output);
1081 Log (undef, "finish");
1086 if ($collated_output && $main::success) {
1087 $final_state = 'Complete';
1089 $final_state = 'Failed';
1091 $Job->update_attributes('state' => $final_state);
1093 exit (($final_state eq 'Complete') ? 0 : 1);
1097 sub update_progress_stats
1099 $progress_stats_updated = time;
1100 return if !$progress_is_dirty;
1101 my ($todo, $done, $running) = (scalar @jobstep_todo,
1102 scalar @jobstep_done,
1103 scalar @slot - scalar @freeslot - scalar @holdslot);
1104 $Job->{'tasks_summary'} ||= {};
1105 $Job->{'tasks_summary'}->{'todo'} = $todo;
1106 $Job->{'tasks_summary'}->{'done'} = $done;
1107 $Job->{'tasks_summary'}->{'running'} = $running;
1108 $Job->update_attributes('tasks_summary' => $Job->{'tasks_summary'});
1109 Log (undef, "status: $done done, $running running, $todo todo");
1110 $progress_is_dirty = 0;
1117 my $pid = waitpid (-1, WNOHANG);
1118 return 0 if $pid <= 0;
1120 my $whatslot = ($slot[$proc{$pid}->{slot}]->{node}->{name}
1122 . $slot[$proc{$pid}->{slot}]->{cpu});
1123 my $jobstepid = $proc{$pid}->{jobstep};
1124 my $elapsed = time - $proc{$pid}->{time};
1125 my $Jobstep = $jobstep[$jobstepid];
1127 my $childstatus = $?;
1128 my $exitvalue = $childstatus >> 8;
1129 my $exitinfo = "exit ".exit_status_s($childstatus);
1130 $Jobstep->{'arvados_task'}->reload;
1131 my $task_success = $Jobstep->{'arvados_task'}->{success};
1133 Log ($jobstepid, "child $pid on $whatslot $exitinfo success=$task_success");
1135 if (!defined $task_success) {
1136 # task did not indicate one way or the other --> fail
1137 $Jobstep->{'arvados_task'}->{success} = 0;
1138 $Jobstep->{'arvados_task'}->save;
1145 $temporary_fail ||= $Jobstep->{node_fail};
1146 $temporary_fail ||= ($exitvalue == TASK_TEMPFAIL);
1148 ++$thisround_failed;
1149 ++$thisround_failed_multiple if $Jobstep->{'failures'} >= 1;
1151 # Check for signs of a failed or misconfigured node
1152 if (++$slot[$proc{$pid}->{slot}]->{node}->{losing_streak} >=
1153 2+$slot[$proc{$pid}->{slot}]->{node}->{ncpus}) {
1154 # Don't count this against jobstep failure thresholds if this
1155 # node is already suspected faulty and srun exited quickly
1156 if ($slot[$proc{$pid}->{slot}]->{node}->{hold_until} &&
1158 Log ($jobstepid, "blaming failure on suspect node " .
1159 $slot[$proc{$pid}->{slot}]->{node}->{name});
1160 $temporary_fail ||= 1;
1162 ban_node_by_slot($proc{$pid}->{slot});
1165 Log ($jobstepid, sprintf('failure (#%d, %s) after %d seconds',
1166 ++$Jobstep->{'failures'},
1167 $temporary_fail ? 'temporary' : 'permanent',
1170 if (!$temporary_fail || $Jobstep->{'failures'} >= 3) {
1171 # Give up on this task, and the whole job
1174 # Put this task back on the todo queue
1175 push @jobstep_todo, $jobstepid;
1176 $Job->{'tasks_summary'}->{'failed'}++;
1180 ++$thisround_succeeded;
1181 $slot[$proc{$pid}->{slot}]->{node}->{losing_streak} = 0;
1182 $slot[$proc{$pid}->{slot}]->{node}->{hold_until} = 0;
1183 push @jobstep_done, $jobstepid;
1184 Log ($jobstepid, "success in $elapsed seconds");
1186 $Jobstep->{exitcode} = $childstatus;
1187 $Jobstep->{finishtime} = time;
1188 $Jobstep->{'arvados_task'}->{finished_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{finishtime});
1189 $Jobstep->{'arvados_task'}->save;
1190 process_stderr ($jobstepid, $task_success);
1191 Log ($jobstepid, sprintf("task output (%d bytes): %s",
1192 length($Jobstep->{'arvados_task'}->{output}),
1193 $Jobstep->{'arvados_task'}->{output}));
1195 close $reader{$jobstepid};
1196 delete $reader{$jobstepid};
1197 delete $slot[$proc{$pid}->{slot}]->{pid};
1198 push @freeslot, $proc{$pid}->{slot};
1201 if ($task_success) {
1203 my $newtask_list = [];
1204 my $newtask_results;
1206 $newtask_results = api_call(
1209 'created_by_job_task_uuid' => $Jobstep->{'arvados_task'}->{uuid}
1211 'order' => 'qsequence',
1212 'offset' => scalar(@$newtask_list),
1214 push(@$newtask_list, @{$newtask_results->{items}});
1215 } while (@{$newtask_results->{items}});
1216 foreach my $arvados_task (@$newtask_list) {
1218 'level' => $arvados_task->{'sequence'},
1220 'arvados_task' => $arvados_task
1222 push @jobstep, $jobstep;
1223 push @jobstep_todo, $#jobstep;
1227 $progress_is_dirty = 1;
1231 sub check_refresh_wanted
1233 my @stat = stat $ENV{"CRUNCH_REFRESH_TRIGGER"};
1234 if (@stat && $stat[9] > $latest_refresh) {
1235 $latest_refresh = scalar time;
1236 my $Job2 = api_call("jobs/get", uuid => $jobspec);
1237 for my $attr ('cancelled_at',
1238 'cancelled_by_user_uuid',
1239 'cancelled_by_client_uuid',
1241 $Job->{$attr} = $Job2->{$attr};
1243 if ($Job->{'state'} ne "Running") {
1244 if ($Job->{'state'} eq "Cancelled") {
1245 Log (undef, "Job cancelled at " . $Job->{'cancelled_at'} . " by user " . $Job->{'cancelled_by_user_uuid'});
1247 Log (undef, "Job state unexpectedly changed to " . $Job->{'state'});
1250 $main::please_freeze = 1;
1257 my $last_squeue_check = $squeue_checked;
1259 # Do not call `squeue` or check the kill list more than once every
1261 return if $last_squeue_check > time - 15;
1262 $squeue_checked = time;
1264 # Look for children from which we haven't received stderr data since
1265 # the last squeue check. If no such children exist, all procs are
1266 # alive and there's no need to even look at squeue.
1268 # As long as the crunchstat poll interval (10s) is shorter than the
1269 # squeue check interval (15s) this should make the squeue check an
1271 my $silent_procs = 0;
1272 for my $jobstep (values %proc)
1274 if ($jobstep->{stderr_at} < $last_squeue_check)
1279 return if $silent_procs == 0;
1281 # use killem() on procs whose killtime is reached
1282 while (my ($pid, $jobstep) = each %proc)
1284 if (exists $jobstep->{killtime}
1285 && $jobstep->{killtime} <= time
1286 && $jobstep->{stderr_at} < $last_squeue_check)
1289 if ($jobstep->{stderr_at}) {
1290 $sincewhen = " in last " . (time - $jobstep->{stderr_at}) . "s";
1292 Log($jobstep->{jobstep}, "killing orphaned srun process $pid (task not in slurm queue, no stderr received$sincewhen)");
1299 # here is an opportunity to check for mysterious problems with local procs
1303 # Get a list of steps still running. Note: squeue(1) says --steps
1304 # selects a format (which we override anyway) and allows us to
1305 # specify which steps we're interested in (which we don't).
1306 # Importantly, it also changes the meaning of %j from "job name" to
1307 # "step name" and (although this isn't mentioned explicitly in the
1308 # docs) switches from "one line per job" mode to "one line per step"
1309 # mode. Without it, we'd just get a list of one job, instead of a
1311 my @squeue = `squeue --jobs=\Q$ENV{SLURM_JOB_ID}\E --steps --format='%j' --noheader`;
1314 Log(undef, "warning: squeue exit status $? ($!)");
1319 # which of my jobsteps are running, according to squeue?
1321 for my $jobstepname (@squeue)
1323 $ok{$jobstepname} = 1;
1326 # Check for child procs >60s old and not mentioned by squeue.
1327 while (my ($pid, $jobstep) = each %proc)
1329 if ($jobstep->{time} < time - 60
1330 && $jobstep->{jobstepname}
1331 && !exists $ok{$jobstep->{jobstepname}}
1332 && !exists $jobstep->{killtime})
1334 # According to slurm, this task has ended (successfully or not)
1335 # -- but our srun child hasn't exited. First we must wait (30
1336 # seconds) in case this is just a race between communication
1337 # channels. Then, if our srun child process still hasn't
1338 # terminated, we'll conclude some slurm communication
1339 # error/delay has caused the task to die without notifying srun,
1340 # and we'll kill srun ourselves.
1341 $jobstep->{killtime} = time + 30;
1342 Log($jobstep->{jobstep}, "notice: task is not in slurm queue but srun process $pid has not exited");
1348 sub release_allocation
1352 Log (undef, "release job allocation");
1353 system "scancel $ENV{SLURM_JOB_ID}";
1361 foreach my $job (keys %reader)
1364 while (0 < sysread ($reader{$job}, $buf, 8192))
1366 print STDERR $buf if $ENV{CRUNCH_DEBUG};
1367 $jobstep[$job]->{stderr_at} = time;
1368 $jobstep[$job]->{stderr} .= $buf;
1369 preprocess_stderr ($job);
1370 if (length ($jobstep[$job]->{stderr}) > 16384)
1372 substr ($jobstep[$job]->{stderr}, 0, 8192) = "";
1381 sub preprocess_stderr
1385 while ($jobstep[$job]->{stderr} =~ /^(.*?)\n/) {
1387 substr $jobstep[$job]->{stderr}, 0, 1+length($line), "";
1388 Log ($job, "stderr $line");
1389 if ($line =~ /srun: error: (SLURM job $ENV{SLURM_JOB_ID} has expired|Unable to confirm allocation for job $ENV{SLURM_JOB_ID})/) {
1391 $main::please_freeze = 1;
1393 elsif ($line =~ /(srun: error: (Node failure on|Unable to create job step|.*: Communication connection failure))|arvados.errors.Keep/) {
1394 $jobstep[$job]->{node_fail} = 1;
1395 ban_node_by_slot($jobstep[$job]->{slotindex});
1404 my $task_success = shift;
1405 preprocess_stderr ($job);
1408 Log ($job, "stderr $_");
1409 } split ("\n", $jobstep[$job]->{stderr});
1416 if (!open($keep, "-|", "arv-get", "--retries", retry_count(), $hash)) {
1417 Log(undef, "fetch_block run error from arv-get $hash: $!");
1420 my $output_block = "";
1423 my $bytes = sysread($keep, $buf, 1024 * 1024);
1424 if (!defined $bytes) {
1425 Log(undef, "fetch_block read error from arv-get: $!");
1426 $output_block = undef;
1428 } elsif ($bytes == 0) {
1429 # sysread returns 0 at the end of the pipe.
1432 # some bytes were read into buf.
1433 $output_block .= $buf;
1438 Log(undef, "fetch_block arv-get exited " . exit_status_s($?));
1439 $output_block = undef;
1441 return $output_block;
1444 # Create a collection by concatenating the output of all tasks (each
1445 # task's output is either a manifest fragment, a locator for a
1446 # manifest fragment stored in Keep, or nothing at all). Return the
1447 # portable_data_hash of the new collection.
1448 sub create_output_collection
1450 Log (undef, "collate");
1452 my ($child_out, $child_in);
1453 my $pid = open2($child_out, $child_in, 'python', '-c', q{
1456 print (arvados.api("v1").collections().
1457 create(body={"manifest_text": sys.stdin.read()}).
1458 execute(num_retries=int(sys.argv[1]))["portable_data_hash"])
1462 my $manifest_size = 0;
1466 my $output = $_->{'arvados_task'}->{output};
1467 next if (!defined($output));
1469 if ($output =~ /^[0-9a-f]{32}(\+\S+)*$/) {
1470 $next_write = fetch_block($output);
1472 $next_write = $output;
1474 if (defined($next_write)) {
1475 if (!defined(syswrite($child_in, $next_write))) {
1476 # There's been an error writing. Stop the loop.
1477 # We'll log details about the exit code later.
1480 $manifest_size += length($next_write);
1483 my $uuid = $_->{'arvados_task'}->{'uuid'};
1484 Log (undef, "Error retrieving '$output' output by task $task_idx ($uuid)");
1489 Log(undef, "collated output manifest text to send to API server is $manifest_size bytes with access tokens");
1492 my $s = IO::Select->new($child_out);
1493 if ($s->can_read(120)) {
1494 sysread($child_out, $joboutput, 1024 * 1024);
1497 Log(undef, "output collection creation exited " . exit_status_s($?));
1503 Log (undef, "timed out while creating output collection");
1504 foreach my $signal (2, 2, 2, 15, 15, 9) {
1505 kill($signal, $pid);
1506 last if waitpid($pid, WNOHANG) == -1;
1520 my $sig = 2; # SIGINT first
1521 if (exists $proc{$_}->{"sent_$sig"} &&
1522 time - $proc{$_}->{"sent_$sig"} > 4)
1524 $sig = 15; # SIGTERM if SIGINT doesn't work
1526 if (exists $proc{$_}->{"sent_$sig"} &&
1527 time - $proc{$_}->{"sent_$sig"} > 4)
1529 $sig = 9; # SIGKILL if SIGTERM doesn't work
1531 if (!exists $proc{$_}->{"sent_$sig"})
1533 Log ($proc{$_}->{jobstep}, "sending 2x signal $sig to pid $_");
1535 select (undef, undef, undef, 0.1);
1538 kill $sig, $_; # srun wants two SIGINT to really interrupt
1540 $proc{$_}->{"sent_$sig"} = time;
1541 $proc{$_}->{"killedafter"} = time - $proc{$_}->{"time"};
1551 vec($bits,fileno($_),1) = 1;
1557 # Send log output to Keep via arv-put.
1559 # $log_pipe_in and $log_pipe_out are the input and output filehandles to the arv-put pipe.
1560 # $log_pipe_out_buf is a string containing all output read from arv-put so far.
1561 # $log_pipe_out_select is an IO::Select object around $log_pipe_out.
1562 # $log_pipe_pid is the pid of the arv-put subprocess.
1564 # The only functions that should access these variables directly are:
1566 # log_writer_start($logfilename)
1567 # Starts an arv-put pipe, reading data on stdin and writing it to
1568 # a $logfilename file in an output collection.
1570 # log_writer_read_output([$timeout])
1571 # Read output from $log_pipe_out and append it to $log_pipe_out_buf.
1572 # Passes $timeout to the select() call, with a default of 0.01.
1573 # Returns the result of the last read() call on $log_pipe_out, or
1574 # -1 if read() wasn't called because select() timed out.
1575 # Only other log_writer_* functions should need to call this.
1577 # log_writer_send($txt)
1578 # Writes $txt to the output log collection.
1580 # log_writer_finish()
1581 # Closes the arv-put pipe and returns the output that it produces.
1583 # log_writer_is_active()
1584 # Returns a true value if there is currently a live arv-put
1585 # process, false otherwise.
1587 my ($log_pipe_in, $log_pipe_out, $log_pipe_out_buf, $log_pipe_out_select,
1590 sub log_writer_start($)
1592 my $logfilename = shift;
1593 $log_pipe_pid = open2($log_pipe_out, $log_pipe_in,
1597 '--filename', $logfilename,
1599 $log_pipe_out_buf = "";
1600 $log_pipe_out_select = IO::Select->new($log_pipe_out);
1603 sub log_writer_read_output {
1604 my $timeout = shift || 0.01;
1606 while ($read && $log_pipe_out_select->can_read($timeout)) {
1607 $read = read($log_pipe_out, $log_pipe_out_buf, 65536,
1608 length($log_pipe_out_buf));
1610 if (!defined($read)) {
1611 Log(undef, "error reading log manifest from arv-put: $!");
1616 sub log_writer_send($)
1619 print $log_pipe_in $txt;
1620 log_writer_read_output();
1623 sub log_writer_finish()
1625 return unless $log_pipe_pid;
1627 close($log_pipe_in);
1629 my $read_result = log_writer_read_output(120);
1630 if ($read_result == -1) {
1631 Log (undef, "timed out reading from 'arv-put'");
1632 } elsif ($read_result != 0) {
1633 Log(undef, "failed to read arv-put log manifest to EOF");
1636 waitpid($log_pipe_pid, 0);
1638 Log(undef, "log_writer_finish: arv-put exited " . exit_status_s($?))
1641 close($log_pipe_out);
1642 my $arv_put_output = $log_pipe_out_buf;
1643 $log_pipe_pid = $log_pipe_in = $log_pipe_out = $log_pipe_out_buf =
1644 $log_pipe_out_select = undef;
1646 return $arv_put_output;
1649 sub log_writer_is_active() {
1650 return $log_pipe_pid;
1653 sub Log # ($jobstep_id, $logmessage)
1655 if ($_[1] =~ /\n/) {
1656 for my $line (split (/\n/, $_[1])) {
1661 my $fh = select STDERR; $|=1; select $fh;
1662 my $message = sprintf ("%s %d %s %s", $job_id, $$, @_);
1663 $message =~ s{([^ -\176])}{"\\" . sprintf ("%03o", ord($1))}ge;
1666 if (log_writer_is_active() || -t STDERR) {
1667 my @gmtime = gmtime;
1668 $datetime = sprintf ("%04d-%02d-%02d_%02d:%02d:%02d",
1669 $gmtime[5]+1900, $gmtime[4]+1, @gmtime[3,2,1,0]);
1671 print STDERR ((-t STDERR) ? ($datetime." ".$message) : $message);
1673 if (log_writer_is_active()) {
1674 log_writer_send($datetime . " " . $message);
1681 my ($package, $file, $line) = caller;
1682 my $message = "@_ at $file line $line\n";
1683 Log (undef, $message);
1684 freeze() if @jobstep_todo;
1685 create_output_collection() if @jobstep_todo;
1695 if ($Job->{'state'} eq 'Cancelled') {
1696 $Job->update_attributes('finished_at' => scalar gmtime);
1698 $Job->update_attributes('state' => 'Failed');
1705 my $justcheckpoint = shift; # false if this will be the last meta saved
1706 return if $justcheckpoint; # checkpointing is not relevant post-Warehouse.pm
1707 return unless log_writer_is_active();
1709 my $log_manifest = "";
1711 my $prev_log_coll = api_call("collections/get", uuid => $Job->{log});
1712 $log_manifest .= $prev_log_coll->{manifest_text};
1714 $log_manifest .= log_writer_finish();
1716 my $log_coll = api_call(
1717 "collections/create", ensure_unique_name => 1, collection => {
1718 manifest_text => $log_manifest,
1719 owner_uuid => $Job->{owner_uuid},
1720 name => sprintf("Log from %s job %s", $Job->{script}, $Job->{uuid}),
1722 Log(undef, "log manifest is " . $log_coll->{portable_data_hash});
1723 $Job->{'log'} = $log_coll->{portable_data_hash};
1724 $Job->update_attributes('log', $log_coll->{portable_data_hash});
1728 sub freeze_if_want_freeze
1730 if ($main::please_freeze)
1732 release_allocation();
1735 # kill some srun procs before freeze+stop
1736 map { $proc{$_} = {} } @_;
1739 killem (keys %proc);
1740 select (undef, undef, undef, 0.1);
1742 while (($died = waitpid (-1, WNOHANG)) > 0)
1744 delete $proc{$died};
1749 create_output_collection();
1759 Log (undef, "Freeze not implemented");
1766 croak ("Thaw not implemented");
1782 $s =~ s{\\(.)}{$1 eq "n" ? "\n" : $1}ge;
1789 my $srunargs = shift;
1790 my $execargs = shift;
1791 my $opts = shift || {};
1793 my $args = $have_slurm ? [@$srunargs, @$execargs] : $execargs;
1795 $Data::Dumper::Terse = 1;
1796 $Data::Dumper::Indent = 0;
1797 my $show_cmd = Dumper($args);
1798 $show_cmd =~ s/(TOKEN\\*=)[^\s\']+/${1}[...]/g;
1799 $show_cmd =~ s/\n/ /g;
1800 if ($opts->{fork}) {
1801 Log(undef, "starting: $show_cmd");
1803 # This is a child process: parent is in charge of reading our
1804 # stderr and copying it to Log() if needed.
1805 warn "starting: $show_cmd\n";
1808 if (defined $stdin) {
1809 my $child = open STDIN, "-|";
1810 defined $child or die "no fork: $!";
1812 print $stdin or die $!;
1813 close STDOUT or die $!;
1818 return system (@$args) if $opts->{fork};
1821 warn "ENV size is ".length(join(" ",%ENV));
1822 die "exec failed: $!: @$args";
1826 sub ban_node_by_slot {
1827 # Don't start any new jobsteps on this node for 60 seconds
1829 $slot[$slotid]->{node}->{hold_until} = 60 + scalar time;
1830 $slot[$slotid]->{node}->{hold_count}++;
1831 Log (undef, "backing off node " . $slot[$slotid]->{node}->{name} . " for 60 seconds");
1836 my ($lockfile, $error_message) = @_;
1837 open L, ">", $lockfile or croak("$lockfile: $!");
1838 if (!flock L, LOCK_EX|LOCK_NB) {
1839 croak("Can't lock $lockfile: $error_message\n");
1843 sub find_docker_image {
1844 # Given a Keep locator, check to see if it contains a Docker image.
1845 # If so, return its stream name and Docker hash.
1846 # If not, return undef for both values.
1847 my $locator = shift;
1848 my ($streamname, $filename);
1849 my $image = api_call("collections/get", uuid => $locator);
1851 foreach my $line (split(/\n/, $image->{manifest_text})) {
1852 my @tokens = split(/\s+/, $line);
1854 $streamname = shift(@tokens);
1855 foreach my $filedata (grep(/^\d+:\d+:/, @tokens)) {
1856 if (defined($filename)) {
1857 return (undef, undef); # More than one file in the Collection.
1859 $filename = (split(/:/, $filedata, 3))[2];
1864 if (defined($filename) and ($filename =~ /^([0-9A-Fa-f]{64})\.tar$/)) {
1865 return ($streamname, $1);
1867 return (undef, undef);
1872 # Calculate the number of times an operation should be retried,
1873 # assuming exponential backoff, and that we're willing to retry as
1874 # long as tasks have been running. Enforce a minimum of 3 retries.
1875 my ($starttime, $endtime, $timediff, $retries);
1877 $starttime = $jobstep[0]->{starttime};
1878 $endtime = $jobstep[-1]->{finishtime};
1880 if (!defined($starttime)) {
1882 } elsif (!defined($endtime)) {
1883 $timediff = time - $starttime;
1885 $timediff = ($endtime - $starttime) - (time - $endtime);
1887 if ($timediff > 0) {
1888 $retries = int(log($timediff) / log(2));
1890 $retries = 1; # Use the minimum.
1892 return ($retries > 3) ? $retries : 3;
1896 # Pass in two function references.
1897 # This method will be called with the remaining arguments.
1898 # If it dies, retry it with exponential backoff until it succeeds,
1899 # or until the current retry_count is exhausted. After each failure
1900 # that can be retried, the second function will be called with
1901 # the current try count (0-based), next try time, and error message.
1902 my $operation = shift;
1903 my $retry_callback = shift;
1904 my $retries = retry_count();
1905 foreach my $try_count (0..$retries) {
1906 my $next_try = time + (2 ** $try_count);
1907 my $result = eval { $operation->(@_); };
1910 } elsif ($try_count < $retries) {
1911 $retry_callback->($try_count, $next_try, $@);
1912 my $sleep_time = $next_try - time;
1913 sleep($sleep_time) if ($sleep_time > 0);
1916 # Ensure the error message ends in a newline, so Perl doesn't add
1917 # retry_op's line number to it.
1923 # Pass in a /-separated API method name, and arguments for it.
1924 # This function will call that method, retrying as needed until
1925 # the current retry_count is exhausted, with a log on the first failure.
1926 my $method_name = shift;
1927 my $log_api_retry = sub {
1928 my ($try_count, $next_try_at, $errmsg) = @_;
1929 $errmsg =~ s/\s*\bat \Q$0\E line \d+\.?\s*//;
1930 $errmsg =~ s/\s/ /g;
1931 $errmsg =~ s/\s+$//;
1933 if ($next_try_at < time) {
1934 $retry_msg = "Retrying.";
1936 my $next_try_fmt = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($next_try_at);
1937 $retry_msg = "Retrying at $next_try_fmt.";
1939 Log(undef, "API method $method_name failed: $errmsg. $retry_msg");
1942 foreach my $key (split(/\//, $method_name)) {
1943 $method = $method->{$key};
1945 return retry_op(sub { $method->execute(@_); }, $log_api_retry, @_);
1949 # Given a $?, return a human-readable exit code string like "0" or
1950 # "1" or "0 with signal 1" or "1 with signal 11".
1951 my $exitcode = shift;
1952 my $s = $exitcode >> 8;
1953 if ($exitcode & 0x7f) {
1954 $s .= " with signal " . ($exitcode & 0x7f);
1956 if ($exitcode & 0x80) {
1957 $s .= " with core dump";
1962 sub handle_readall {
1963 # Pass in a glob reference to a file handle.
1964 # Read all its contents and return them as a string.
1965 my $fh_glob_ref = shift;
1967 return <$fh_glob_ref>;
1970 sub tar_filename_n {
1972 return sprintf("%s/git.%s.%d.tar", $ENV{CRUNCH_TMP}, $job_id, $n);
1975 sub add_git_archive {
1976 # Pass in a git archive command as a string or list, a la system().
1977 # This method will save its output to be included in the archive sent to the
1981 if (!open(GIT_ARCHIVE, ">", tar_filename_n($git_tar_count))) {
1982 croak("Failed to save git archive: $!");
1984 my $git_pid = open2(">&GIT_ARCHIVE", $git_input, @_);
1986 waitpid($git_pid, 0);
1989 croak("Failed to save git archive: git exited " . exit_status_s($?));
1993 sub combined_git_archive {
1994 # Combine all saved tar archives into a single archive, then return its
1995 # contents in a string. Return undef if no archives have been saved.
1996 if ($git_tar_count < 1) {
1999 my $base_tar_name = tar_filename_n(1);
2000 foreach my $tar_to_append (map { tar_filename_n($_); } (2..$git_tar_count)) {
2001 my $tar_exit = system("tar", "-Af", $base_tar_name, $tar_to_append);
2002 if ($tar_exit != 0) {
2003 croak("Error preparing build archive: tar -A exited " .
2004 exit_status_s($tar_exit));
2007 if (!open(GIT_TAR, "<", $base_tar_name)) {
2008 croak("Could not open build archive: $!");
2010 my $tar_contents = handle_readall(\*GIT_TAR);
2012 return $tar_contents;
2015 sub set_nonblocking {
2017 my $flags = fcntl ($fh, F_GETFL, 0) or croak ($!);
2018 fcntl ($fh, F_SETFL, $flags | O_NONBLOCK) or croak ($!);
2024 # This is crunch-job's internal dispatch script. crunch-job running on the API
2025 # server invokes this script on individual compute nodes, or localhost if we're
2026 # running a job locally. It gets called in two modes:
2028 # * No arguments: Installation mode. Read a tar archive from the DATA
2029 # file handle; it includes the Crunch script's source code, and
2030 # maybe SDKs as well. Those should be installed in the proper
2031 # locations. This runs outside of any Docker container, so don't try to
2032 # introspect Crunch's runtime environment.
2034 # * With arguments: Crunch script run mode. This script should set up the
2035 # environment, then run the command specified in the arguments. This runs
2036 # inside any Docker container.
2039 use File::Path qw( make_path remove_tree );
2040 use POSIX qw(getcwd);
2042 use constant TASK_TEMPFAIL => 111;
2044 # Map SDK subdirectories to the path environments they belong to.
2045 my %SDK_ENVVARS = ("perl/lib" => "PERLLIB", "ruby/lib" => "RUBYLIB");
2047 my $destdir = $ENV{"CRUNCH_SRC"};
2048 my $archive_hash = $ENV{"CRUNCH_GIT_ARCHIVE_HASH"};
2049 my $repo = $ENV{"CRUNCH_SRC_URL"};
2050 my $install_dir = $ENV{"CRUNCH_INSTALL"} || (getcwd() . "/opt");
2051 my $job_work = $ENV{"JOB_WORK"};
2052 my $task_work = $ENV{"TASK_WORK"};
2054 open(STDOUT_ORIG, ">&", STDOUT);
2055 open(STDERR_ORIG, ">&", STDERR);
2057 for my $dir ($destdir, $job_work, $task_work) {
2060 -e $dir or die "Failed to create temporary directory ($dir): $!";
2065 remove_tree($task_work, {keep_root => 1});
2068 ### Crunch script run mode
2070 # We want to do routine logging during task 0 only. This gives the user
2071 # the information they need, but avoids repeating the information for every
2074 if ($ENV{TASK_SEQUENCE} eq "0") {
2077 printf STDERR_ORIG "[Crunch] $msg\n", @_;
2083 my $python_src = "$install_dir/python";
2084 my $venv_dir = "$job_work/.arvados.venv";
2085 my $venv_built = -e "$venv_dir/bin/activate";
2086 if ((!$venv_built) and (-d $python_src) and can_run("virtualenv")) {
2087 shell_or_die(undef, "virtualenv", "--quiet", "--system-site-packages",
2088 "--python=python2.7", $venv_dir);
2089 shell_or_die(TASK_TEMPFAIL, "$venv_dir/bin/pip", "--quiet", "install", "-I", $python_src);
2091 $Log->("Built Python SDK virtualenv");
2094 my $pip_bin = "pip";
2096 $Log->("Running in Python SDK virtualenv");
2097 $pip_bin = "$venv_dir/bin/pip";
2098 my $orig_argv = join(" ", map { quotemeta($_); } @ARGV);
2099 @ARGV = ("/bin/sh", "-ec",
2100 ". \Q$venv_dir/bin/activate\E; exec $orig_argv");
2101 } elsif (-d $python_src) {
2102 $Log->("Warning: virtualenv not found inside Docker container default " .
2103 "\$PATH. Can't install Python SDK.");
2106 my $pkgs = `(\Q$pip_bin\E freeze 2>/dev/null | grep arvados) || dpkg-query --show '*arvados*'`;
2108 $Log->("Using Arvados SDK:");
2109 foreach my $line (split /\n/, $pkgs) {
2113 $Log->("Arvados SDK packages not found");
2116 while (my ($sdk_dir, $sdk_envkey) = each(%SDK_ENVVARS)) {
2117 my $sdk_path = "$install_dir/$sdk_dir";
2119 if ($ENV{$sdk_envkey}) {
2120 $ENV{$sdk_envkey} = "$sdk_path:" . $ENV{$sdk_envkey};
2122 $ENV{$sdk_envkey} = $sdk_path;
2124 $Log->("Arvados SDK added to %s", $sdk_envkey);
2129 die "Cannot exec `@ARGV`: $!";
2132 ### Installation mode
2133 open L, ">", "$destdir.lock" or die "$destdir.lock: $!";
2135 if (readlink ("$destdir.archive_hash") eq $archive_hash && -d $destdir) {
2136 # This exact git archive (source + arvados sdk) is already installed
2137 # here, so there's no need to reinstall it.
2139 # We must consume our DATA section, though: otherwise the process
2140 # feeding it to us will get SIGPIPE.
2142 while (read(DATA, $buf, 65536)) { }
2147 unlink "$destdir.archive_hash";
2151 # Ignore SIGPIPE: we check retval of close() instead. See perlipc(1).
2152 local $SIG{PIPE} = "IGNORE";
2153 warn "Extracting archive: $archive_hash\n";
2154 # --ignore-zeros is necessary sometimes: depending on how much NUL
2155 # padding tar -A put on our combined archive (which in turn depends
2156 # on the length of the component archives) tar without
2157 # --ignore-zeros will exit before consuming stdin and cause close()
2158 # to fail on the resulting SIGPIPE.
2159 if (!open(TARX, "|-", "tar", "--ignore-zeros", "-xC", $destdir)) {
2160 die "Error launching 'tar -xC $destdir': $!";
2162 # If we send too much data to tar in one write (> 4-5 MiB), it stops, and we
2163 # get SIGPIPE. We must feed it data incrementally.
2165 while (read(DATA, $tar_input, 65536)) {
2166 print TARX $tar_input;
2169 die "'tar -xC $destdir' exited $?: $!";
2175 my $sdk_root = "$destdir/.arvados.sdk/sdk";
2177 foreach my $sdk_lang (("python",
2178 map { (split /\//, $_, 2)[0]; } keys(%SDK_ENVVARS))) {
2179 if (-d "$sdk_root/$sdk_lang") {
2180 if (!rename("$sdk_root/$sdk_lang", "$install_dir/$sdk_lang")) {
2181 die "Failed to install $sdk_lang SDK: $!";
2187 my $python_dir = "$install_dir/python";
2188 if ((-d $python_dir) and can_run("python2.7")) {
2189 open(my $egg_info_pipe, "-|",
2190 "python2.7 \Q$python_dir/setup.py\E --quiet egg_info 2>&1 >/dev/null");
2191 my @egg_info_errors = <$egg_info_pipe>;
2192 close($egg_info_pipe);
2194 if (@egg_info_errors and ($egg_info_errors[-1] =~ /\bgit\b/)) {
2195 # egg_info apparently failed because it couldn't ask git for a build tag.
2196 # Specify no build tag.
2197 open(my $pysdk_cfg, ">>", "$python_dir/setup.cfg");
2198 print $pysdk_cfg "\n[egg_info]\ntag_build =\n";
2201 my $egg_info_exit = $? >> 8;
2202 foreach my $errline (@egg_info_errors) {
2203 print STDERR_ORIG $errline;
2205 warn "python setup.py egg_info failed: exit $egg_info_exit";
2206 exit ($egg_info_exit || 1);
2211 # Hide messages from the install script (unless it fails: shell_or_die
2212 # will show $destdir.log in that case).
2213 open(STDOUT, ">>", "$destdir.log");
2214 open(STDERR, ">&", STDOUT);
2216 if (-e "$destdir/crunch_scripts/install") {
2217 shell_or_die (undef, "$destdir/crunch_scripts/install", $install_dir);
2218 } elsif (!-e "./install.sh" && -e "./tests/autotests.sh") {
2220 shell_or_die (undef, "./tests/autotests.sh", $install_dir);
2221 } elsif (-e "./install.sh") {
2222 shell_or_die (undef, "./install.sh", $install_dir);
2225 if ($archive_hash) {
2226 unlink "$destdir.archive_hash.new";
2227 symlink ($archive_hash, "$destdir.archive_hash.new") or die "$destdir.archive_hash.new: $!";
2228 rename ("$destdir.archive_hash.new", "$destdir.archive_hash") or die "$destdir.archive_hash: $!";
2234 my $command_name = shift;
2235 open(my $which, "-|", "which", $command_name);
2236 while (<$which>) { }
2243 my $exitcode = shift;
2245 if ($ENV{"DEBUG"}) {
2246 print STDERR "@_\n";
2248 if (system (@_) != 0) {
2251 my $exitstatus = sprintf("exit %d signal %d", $code >> 8, $code & 0x7f);
2252 open STDERR, ">&STDERR_ORIG";
2253 system ("cat $destdir.log >&2");
2254 warn "@_ failed ($err): $exitstatus";
2255 if (defined($exitcode)) {
2259 exit (($code >> 8) || 1);