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 $cgroup_root = "/sys/fs/cgroup";
130 my $docker_bin = "docker.io";
131 my $docker_run_args = "";
132 GetOptions('force-unlock' => \$force_unlock,
133 'git-dir=s' => \$git_dir,
134 'job=s' => \$jobspec,
135 'job-api-token=s' => \$job_api_token,
136 'no-clear-tmp' => \$no_clear_tmp,
137 'resume-stash=s' => \$resume_stash,
138 'cgroup-root=s' => \$cgroup_root,
139 'docker-bin=s' => \$docker_bin,
140 'docker-run-args=s' => \$docker_run_args,
143 if (defined $job_api_token) {
144 $ENV{ARVADOS_API_TOKEN} = $job_api_token;
147 my $have_slurm = exists $ENV{SLURM_JOB_ID} && exists $ENV{SLURM_NODELIST};
152 $main::ENV{CRUNCH_DEBUG} = 1;
156 $main::ENV{CRUNCH_DEBUG} = 0;
159 my $arv = Arvados->new('apiVersion' => 'v1');
168 if ($jobspec =~ /^[-a-z\d]+$/)
170 # $jobspec is an Arvados UUID, not a JSON job specification
171 $Job = api_call("jobs/get", uuid => $jobspec);
176 $local_job = JSON::decode_json($jobspec);
180 # Make sure our workers (our slurm nodes, localhost, or whatever) are
181 # at least able to run basic commands: they aren't down or severely
184 if (($Job || $local_job)->{docker_image_locator}) {
185 $cmd = [$docker_bin, 'ps', '-q'];
187 Log(undef, "Sanity check is `@$cmd`");
188 my ($exited, $stdout, $stderr) = srun_sync(
189 ["srun", "--nodes=\Q$ENV{SLURM_NNODES}\E", "--ntasks-per-node=1"],
191 {label => "sanity check"});
193 Log(undef, "Sanity check failed: ".exit_status_s($exited));
196 Log(undef, "Sanity check OK");
199 my $User = api_call("users/current");
202 if (!$force_unlock) {
203 # Claim this job, and make sure nobody else does
204 eval { api_call("jobs/lock", uuid => $Job->{uuid}); };
206 Log(undef, "Error while locking job, exiting ".EX_TEMPFAIL);
215 map { croak ("No $_ specified") unless $local_job->{$_} }
216 qw(script script_version script_parameters);
219 $local_job->{'is_locked_by_uuid'} = $User->{'uuid'};
220 $local_job->{'started_at'} = gmtime;
221 $local_job->{'state'} = 'Running';
223 $Job = api_call("jobs/create", job => $local_job);
225 $job_id = $Job->{'uuid'};
227 my $keep_logfile = $job_id . '.log.txt';
228 log_writer_start($keep_logfile);
230 $Job->{'runtime_constraints'} ||= {};
231 $Job->{'runtime_constraints'}->{'max_tasks_per_node'} ||= 0;
232 my $max_ncpus = $Job->{'runtime_constraints'}->{'max_tasks_per_node'};
234 my $gem_versions = `gem list --quiet arvados-cli 2>/dev/null`;
236 $gem_versions =~ s/^arvados-cli \(/ with arvados-cli Gem version(s) /;
237 chomp($gem_versions);
238 chop($gem_versions); # Closing parentheses
243 "running from " . ((-e $0) ? realpath($0) : "stdin") . $gem_versions);
245 Log (undef, "check slurm allocation");
248 # Should use $ENV{SLURM_TASKS_PER_NODE} instead of sinfo? (eg. "4(x3),2,4(x2)")
252 my $localcpus = 0 + `grep -cw ^processor /proc/cpuinfo` || 1;
253 push @sinfo, "$localcpus localhost";
255 if (exists $ENV{SLURM_NODELIST})
257 push @sinfo, `sinfo -h --format='%c %N' --nodes=\Q$ENV{SLURM_NODELIST}\E`;
261 my ($ncpus, $slurm_nodelist) = split;
262 $ncpus = $max_ncpus if $max_ncpus && $ncpus > $max_ncpus;
265 while ($slurm_nodelist =~ s/^([^\[,]+?(\[.*?\])?)(,|$)//)
268 if ($nodelist =~ /\[((\d+)(-(\d+))?(,(\d+)(-(\d+))?)*)\]/)
271 foreach (split (",", $ranges))
284 push @nodelist, map {
286 $n =~ s/\[[-,\d]+\]/$_/;
293 push @nodelist, $nodelist;
296 foreach my $nodename (@nodelist)
298 Log (undef, "node $nodename - $ncpus slots");
299 my $node = { name => $nodename,
301 # The number of consecutive times a task has been dispatched
302 # to this node and failed.
304 # The number of consecutive times that SLURM has reported
305 # a node failure since the last successful task.
307 # Don't dispatch work to this node until this time
308 # (in seconds since the epoch) has passed.
310 foreach my $cpu (1..$ncpus)
312 push @slot, { node => $node,
316 push @node, @nodelist;
321 # Ensure that we get one jobstep running on each allocated node before
322 # we start overloading nodes with concurrent steps
324 @slot = sort { $a->{cpu} <=> $b->{cpu} } @slot;
327 $Job->update_attributes(
328 'tasks_summary' => { 'failed' => 0,
333 Log (undef, "start");
334 $SIG{'INT'} = sub { $main::please_freeze = 1; };
335 $SIG{'QUIT'} = sub { $main::please_freeze = 1; };
336 $SIG{'TERM'} = \&croak;
337 $SIG{'TSTP'} = sub { $main::please_freeze = 1; };
338 $SIG{'ALRM'} = sub { $main::please_info = 1; };
339 $SIG{'CONT'} = sub { $main::please_continue = 1; };
340 $SIG{'HUP'} = sub { $main::please_refresh = 1; };
342 $main::please_freeze = 0;
343 $main::please_info = 0;
344 $main::please_continue = 0;
345 $main::please_refresh = 0;
346 my $jobsteps_must_output_keys = 0; # becomes 1 when any task outputs a key
348 grep { $ENV{$1} = $2 if /^(NOCACHE.*?)=(.*)/ } split ("\n", $$Job{knobs});
349 $ENV{"CRUNCH_JOB_UUID"} = $job_id;
350 $ENV{"JOB_UUID"} = $job_id;
353 my @jobstep_todo = ();
354 my @jobstep_done = ();
355 my @jobstep_tomerge = ();
356 my $jobstep_tomerge_level = 0;
357 my $squeue_checked = 0;
358 my $sinfo_checked = 0;
359 my $latest_refresh = scalar time;
363 if (defined $Job->{thawedfromkey})
365 thaw ($Job->{thawedfromkey});
369 my $first_task = api_call("job_tasks/create", job_task => {
370 'job_uuid' => $Job->{'uuid'},
375 push @jobstep, { 'level' => 0,
377 'arvados_task' => $first_task,
379 push @jobstep_todo, 0;
385 must_lock_now("$ENV{CRUNCH_TMP}/.lock", "a job is already running here.");
388 my $build_script = handle_readall(\*DATA);
389 my $nodelist = join(",", @node);
390 my $git_tar_count = 0;
392 if (!defined $no_clear_tmp) {
393 # Find FUSE mounts under $CRUNCH_TMP and unmount them. Then clean
394 # up work directories crunch_tmp/work, crunch_tmp/opt,
397 # TODO: When #5036 is done and widely deployed, we can limit mount's
398 # -t option to simply fuse.keep.
399 my ($exited, $stdout, $stderr) = srun_sync(
400 ["srun", "--nodelist=$nodelist", "-D", $ENV{'TMPDIR'}],
401 ['bash', '-ec', '-o', 'pipefail', 'mount -t fuse,fuse.keep | awk "(index(\$3, \"$CRUNCH_TMP\") == 1){print \$3}" | xargs -r -n 1 fusermount -u -z; sleep 1; rm -rf $JOB_WORK $CRUNCH_INSTALL $CRUNCH_TMP/task $CRUNCH_TMP/src* $CRUNCH_TMP/*.cid'],
402 {label => "clean work dirs"});
404 exit(EX_RETRY_UNLOCKED);
408 # If this job requires a Docker image, install that.
409 my ($docker_locator, $docker_stream, $docker_hash, $docker_limitmem, $dockeruserarg);
410 if ($docker_locator = $Job->{docker_image_locator}) {
411 Log (undef, "Install docker image $docker_locator");
412 ($docker_stream, $docker_hash) = find_docker_image($docker_locator);
415 croak("No Docker image hash found from locator $docker_locator");
417 Log (undef, "docker image hash is $docker_hash");
418 $docker_stream =~ s/^\.//;
419 my $docker_install_script = qq{
420 if $docker_bin images -q --no-trunc --all | grep -xF \Q$docker_hash\E >/dev/null; then
423 declare -a exit_codes=("\${PIPESTATUS[@]}")
424 if [ 0 != "\${exit_codes[0]}" ]; then
425 exit "\${exit_codes[0]}" # `docker images` failed
426 elif [ 1 != "\${exit_codes[1]}" ]; then
427 exit "\${exit_codes[1]}" # `grep` encountered an error
429 # Everything worked fine, but grep didn't find the image on this host.
430 arv-get \Q$docker_locator$docker_stream/$docker_hash.tar\E | $docker_bin load
434 my ($exited, $stdout, $stderr) = srun_sync(
435 ["srun", "--nodelist=" . join(',', @node)],
436 ["/bin/bash", "-o", "pipefail", "-ec", $docker_install_script],
437 {label => "load docker image"});
440 exit(EX_RETRY_UNLOCKED);
443 # Determine whether this version of Docker supports memory+swap limits.
444 ($exited, $stdout, $stderr) = srun_sync(
445 ["srun", "--nodes=1"],
446 [$docker_bin, 'run', '--help'],
447 {label => "check --memory-swap feature"});
448 $docker_limitmem = ($stdout =~ /--memory-swap/);
450 # Find a non-root Docker user to use.
451 # Tries the default user for the container, then 'crunch', then 'nobody',
452 # testing for whether the actual user id is non-zero. This defends against
453 # mistakes but not malice, but we intend to harden the security in the future
454 # so we don't want anyone getting used to their jobs running as root in their
456 my @tryusers = ("", "crunch", "nobody");
457 foreach my $try_user (@tryusers) {
460 if ($try_user eq "") {
461 $label = "check whether default user is UID 0";
464 $label = "check whether user '$try_user' is UID 0";
465 $try_user_arg = "--user=$try_user";
467 my ($exited, $stdout, $stderr) = srun_sync(
468 ["srun", "--nodes=1"],
470 "$docker_bin run $docker_run_args $try_user_arg $docker_hash id --user"],
473 if ($exited == 0 && $stdout =~ /^\d+$/ && $stdout > 0) {
474 $dockeruserarg = $try_user_arg;
475 if ($try_user eq "") {
476 Log(undef, "Container will run with default user");
478 Log(undef, "Container will run with $dockeruserarg");
484 if (!defined $dockeruserarg) {
485 croak("Could not find a user in container that is not UID 0 (tried default user, @tryusers) or there was a problem running 'id' in the container.");
488 if ($Job->{arvados_sdk_version}) {
489 # The job also specifies an Arvados SDK version. Add the SDKs to the
490 # tar file for the build script to install.
491 Log(undef, sprintf("Packing Arvados SDK version %s for installation",
492 $Job->{arvados_sdk_version}));
493 add_git_archive("git", "--git-dir=$git_dir", "archive",
494 "--prefix=.arvados.sdk/",
495 $Job->{arvados_sdk_version}, "sdk");
499 if (!defined $git_dir && $Job->{'script_version'} =~ m{^/}) {
500 # If script_version looks like an absolute path, *and* the --git-dir
501 # argument was not given -- which implies we were not invoked by
502 # crunch-dispatch -- we will use the given path as a working
503 # directory instead of resolving script_version to a git commit (or
504 # doing anything else with git).
505 $ENV{"CRUNCH_SRC_COMMIT"} = $Job->{'script_version'};
506 $ENV{"CRUNCH_SRC"} = $Job->{'script_version'};
509 # Resolve the given script_version to a git commit sha1. Also, if
510 # the repository is remote, clone it into our local filesystem: this
511 # ensures "git archive" will work, and is necessary to reliably
512 # resolve a symbolic script_version like "master^".
513 $ENV{"CRUNCH_SRC"} = "$ENV{CRUNCH_TMP}/src";
515 Log (undef, "Looking for version ".$Job->{script_version}." from repository ".$Job->{repository});
517 $ENV{"CRUNCH_SRC_COMMIT"} = $Job->{script_version};
519 # If we're running under crunch-dispatch, it will have already
520 # pulled the appropriate source tree into its own repository, and
521 # given us that repo's path as $git_dir.
523 # If we're running a "local" job, we might have to fetch content
524 # from a remote repository.
526 # (Currently crunch-dispatch gives a local path with --git-dir, but
527 # we might as well accept URLs there too in case it changes its
529 my $repo = $git_dir || $Job->{'repository'};
531 # Repository can be remote or local. If remote, we'll need to fetch it
532 # to a local dir before doing `git log` et al.
535 if ($repo =~ m{://|^[^/]*:}) {
536 # $repo is a git url we can clone, like git:// or https:// or
537 # file:/// or [user@]host:repo.git. Note "user/name@host:foo" is
538 # not recognized here because distinguishing that from a local
539 # path is too fragile. If you really need something strange here,
540 # use the ssh:// form.
541 $repo_location = 'remote';
542 } elsif ($repo =~ m{^\.*/}) {
543 # $repo is a local path to a git index. We'll also resolve ../foo
544 # to ../foo/.git if the latter is a directory. To help
545 # disambiguate local paths from named hosted repositories, this
546 # form must be given as ./ or ../ if it's a relative path.
547 if (-d "$repo/.git") {
548 $repo = "$repo/.git";
550 $repo_location = 'local';
552 # $repo is none of the above. It must be the name of a hosted
554 my $arv_repo_list = api_call("repositories/list",
555 'filters' => [['name','=',$repo]]);
556 my @repos_found = @{$arv_repo_list->{'items'}};
557 my $n_found = $arv_repo_list->{'serverResponse'}->{'items_available'};
559 Log(undef, "Repository '$repo' -> "
560 . join(", ", map { $_->{'uuid'} } @repos_found));
563 croak("Error: Found $n_found repositories with name '$repo'.");
565 $repo = $repos_found[0]->{'fetch_url'};
566 $repo_location = 'remote';
568 Log(undef, "Using $repo_location repository '$repo'");
569 $ENV{"CRUNCH_SRC_URL"} = $repo;
571 # Resolve given script_version (we'll call that $treeish here) to a
572 # commit sha1 ($commit).
573 my $treeish = $Job->{'script_version'};
575 if ($repo_location eq 'remote') {
576 # We minimize excess object-fetching by re-using the same bare
577 # repository in CRUNCH_TMP/.git for multiple crunch-jobs -- we
578 # just keep adding remotes to it as needed.
579 my $local_repo = $ENV{'CRUNCH_TMP'}."/.git";
580 my $gitcmd = "git --git-dir=\Q$local_repo\E";
582 # Set up our local repo for caching remote objects, making
584 if (!-d $local_repo) {
585 make_path($local_repo) or croak("Error: could not create $local_repo");
587 # This works (exits 0 and doesn't delete fetched objects) even
588 # if $local_repo is already initialized:
589 `$gitcmd init --bare`;
591 croak("Error: $gitcmd init --bare exited ".exit_status_s($?));
594 # If $treeish looks like a hash (or abbrev hash) we look it up in
595 # our local cache first, since that's cheaper. (We don't want to
596 # do that with tags/branches though -- those change over time, so
597 # they should always be resolved by the remote repo.)
598 if ($treeish =~ /^[0-9a-f]{7,40}$/s) {
599 # Hide stderr because it's normal for this to fail:
600 my $sha1 = `$gitcmd rev-list -n1 ''\Q$treeish\E 2>/dev/null`;
602 # Careful not to resolve a branch named abcdeff to commit 1234567:
603 $sha1 =~ /^$treeish/ &&
604 $sha1 =~ /^([0-9a-f]{40})$/s) {
606 Log(undef, "Commit $commit already present in $local_repo");
610 if (!defined $commit) {
611 # If $treeish isn't just a hash or abbrev hash, or isn't here
612 # yet, we need to fetch the remote to resolve it correctly.
614 # First, remove all local heads. This prevents a name that does
615 # not exist on the remote from resolving to (or colliding with)
616 # a previously fetched branch or tag (possibly from a different
618 remove_tree("$local_repo/refs/heads", {keep_root => 1});
620 Log(undef, "Fetching objects from $repo to $local_repo");
621 `$gitcmd fetch --no-progress --tags ''\Q$repo\E \Q+refs/heads/*:refs/heads/*\E`;
623 croak("Error: `$gitcmd fetch` exited ".exit_status_s($?));
627 # Now that the data is all here, we will use our local repo for
628 # the rest of our git activities.
632 my $gitcmd = "git --git-dir=\Q$repo\E";
633 my $sha1 = `$gitcmd rev-list -n1 ''\Q$treeish\E`;
634 unless ($? == 0 && $sha1 =~ /^([0-9a-f]{40})$/) {
635 croak("`$gitcmd rev-list` exited "
637 .", '$treeish' not found, giving up");
640 Log(undef, "Version $treeish is commit $commit");
642 if ($commit ne $Job->{'script_version'}) {
643 # Record the real commit id in the database, frozentokey, logs,
644 # etc. -- instead of an abbreviation or a branch name which can
645 # become ambiguous or point to a different commit in the future.
646 if (!$Job->update_attributes('script_version' => $commit)) {
647 croak("Error: failed to update job's script_version attribute");
651 $ENV{"CRUNCH_SRC_COMMIT"} = $commit;
652 add_git_archive("$gitcmd archive ''\Q$commit\E");
655 my $git_archive = combined_git_archive();
656 if (!defined $git_archive) {
657 Log(undef, "Skip install phase (no git archive)");
659 Log(undef, "Warning: This probably means workers have no source tree!");
664 my $install_script_tries_left = 3;
665 for (my $attempts = 0; $attempts < 3; $attempts++) {
666 my @srunargs = ("srun",
667 "--nodelist=$nodelist",
668 "-D", $ENV{'TMPDIR'}, "--job-name=$job_id");
669 my @execargs = ("sh", "-c",
670 "mkdir -p $ENV{CRUNCH_INSTALL} && cd $ENV{CRUNCH_TMP} && perl -");
672 $ENV{"CRUNCH_GIT_ARCHIVE_HASH"} = md5_hex($git_archive);
673 my ($stdout, $stderr);
674 ($exited, $stdout, $stderr) = srun_sync(
675 \@srunargs, \@execargs,
676 {label => "run install script on all workers"},
677 $build_script . $git_archive);
679 my $stderr_anything_from_script = 0;
680 for my $line (split(/\n/, $stderr)) {
681 if ($line !~ /^(srun: error: |starting: \[)/) {
682 $stderr_anything_from_script = 1;
686 last if $exited == 0 || $main::please_freeze;
688 # If the install script fails but doesn't print an error message,
689 # the next thing anyone is likely to do is just run it again in
690 # case it was a transient problem like "slurm communication fails
691 # because the network isn't reliable enough". So we'll just do
692 # that ourselves (up to 3 attempts in total). OTOH, if there is an
693 # error message, the problem is more likely to have a real fix and
694 # we should fail the job so the fixing process can start, instead
695 # of doing 2 more attempts.
696 last if $stderr_anything_from_script;
699 foreach my $tar_filename (map { tar_filename_n($_); } (1..$git_tar_count)) {
700 unlink($tar_filename);
708 foreach (qw (script script_version script_parameters runtime_constraints))
712 (ref($Job->{$_}) ? JSON::encode_json($Job->{$_}) : $Job->{$_}));
714 foreach (split (/\n/, $Job->{knobs}))
716 Log (undef, "knob " . $_);
721 $main::success = undef;
727 my $thisround_succeeded = 0;
728 my $thisround_failed = 0;
729 my $thisround_failed_multiple = 0;
730 my $working_slot_count = scalar(@slot);
732 @jobstep_todo = sort { $jobstep[$a]->{level} <=> $jobstep[$b]->{level}
733 or $a <=> $b } @jobstep_todo;
734 my $level = $jobstep[$jobstep_todo[0]]->{level};
736 my $initial_tasks_this_level = 0;
737 foreach my $id (@jobstep_todo) {
738 $initial_tasks_this_level++ if ($jobstep[$id]->{level} == $level);
741 # If the number of tasks scheduled at this level #T is smaller than the number
742 # of slots available #S, only use the first #T slots, or the first slot on
743 # each node, whichever number is greater.
745 # When we dispatch tasks later, we'll allocate whole-node resources like RAM
746 # based on these numbers. Using fewer slots makes more resources available
747 # to each individual task, which should normally be a better strategy when
748 # there are fewer of them running with less parallelism.
750 # Note that this calculation is not redone if the initial tasks at
751 # this level queue more tasks at the same level. This may harm
752 # overall task throughput for that level.
754 if ($initial_tasks_this_level < @node) {
755 @freeslot = (0..$#node);
756 } elsif ($initial_tasks_this_level < @slot) {
757 @freeslot = (0..$initial_tasks_this_level - 1);
759 @freeslot = (0..$#slot);
761 my $round_num_freeslots = scalar(@freeslot);
762 print STDERR "crunch-job have ${round_num_freeslots} free slots for ${initial_tasks_this_level} initial tasks at this level, ".scalar(@node)." nodes, and ".scalar(@slot)." slots\n";
764 my %round_max_slots = ();
765 for (my $ii = $#freeslot; $ii >= 0; $ii--) {
766 my $this_slot = $slot[$freeslot[$ii]];
767 my $node_name = $this_slot->{node}->{name};
768 $round_max_slots{$node_name} ||= $this_slot->{cpu};
769 last if (scalar(keys(%round_max_slots)) >= @node);
772 Log(undef, "start level $level with $round_num_freeslots slots");
775 my $progress_is_dirty = 1;
776 my $progress_stats_updated = 0;
778 update_progress_stats();
782 for (my $todo_ptr = 0; $todo_ptr <= $#jobstep_todo; $todo_ptr ++)
784 # Don't create new tasks if we already know the job's final result.
785 last if defined($main::success);
787 my $id = $jobstep_todo[$todo_ptr];
788 my $Jobstep = $jobstep[$id];
789 if ($Jobstep->{level} != $level)
794 pipe $reader{$id}, "writer" or croak("pipe() failed: $!");
795 set_nonblocking($reader{$id});
797 my $childslot = $freeslot[0];
798 my $childnode = $slot[$childslot]->{node};
799 my $childslotname = join (".",
800 $slot[$childslot]->{node}->{name},
801 $slot[$childslot]->{cpu});
803 my $childpid = fork();
806 $SIG{'INT'} = 'DEFAULT';
807 $SIG{'QUIT'} = 'DEFAULT';
808 $SIG{'TERM'} = 'DEFAULT';
810 foreach (values (%reader))
814 fcntl ("writer", F_SETFL, 0) or croak ($!); # no close-on-exec
815 open(STDOUT,">&writer");
816 open(STDERR,">&writer");
821 delete $ENV{"GNUPGHOME"};
822 $ENV{"TASK_UUID"} = $Jobstep->{'arvados_task'}->{'uuid'};
823 $ENV{"TASK_QSEQUENCE"} = $id;
824 $ENV{"TASK_SEQUENCE"} = $level;
825 $ENV{"JOB_SCRIPT"} = $Job->{script};
826 while (my ($param, $value) = each %{$Job->{script_parameters}}) {
827 $param =~ tr/a-z/A-Z/;
828 $ENV{"JOB_PARAMETER_$param"} = $value;
830 $ENV{"TASK_SLOT_NODE"} = $slot[$childslot]->{node}->{name};
831 $ENV{"TASK_SLOT_NUMBER"} = $slot[$childslot]->{cpu};
832 $ENV{"TASK_WORK"} = $ENV{"CRUNCH_TMP"}."/task/$childslotname";
833 $ENV{"HOME"} = $ENV{"TASK_WORK"};
834 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
835 $ENV{"CRUNCH_NODE_SLOTS"} = $round_max_slots{$ENV{TASK_SLOT_NODE}};
836 $ENV{"PATH"} = $ENV{"CRUNCH_INSTALL"} . "/bin:" . $ENV{"PATH"};
838 my $keep_mnt = $ENV{"TASK_WORK"}.".keep";
844 "--nodelist=".$childnode->{name},
845 qw(-n1 -c1 -N1 -D), $ENV{'TMPDIR'},
846 "--job-name=$job_id.$id.$$",
849 my $stdbuf = " stdbuf --output=0 --error=0 ";
851 my $arv_file_cache = "";
852 if (defined($Job->{'runtime_constraints'}->{'keep_cache_mb_per_task'})) {
853 $arv_file_cache = "--file-cache=" . ($Job->{'runtime_constraints'}->{'keep_cache_mb_per_task'} * 1024 * 1024);
857 "if [ -e \Q$ENV{TASK_WORK}\E ]; then rm -rf \Q$ENV{TASK_WORK}\E; fi; "
858 ."mkdir -p \Q$ENV{CRUNCH_TMP}\E \Q$ENV{JOB_WORK}\E \Q$ENV{TASK_WORK}\E \Q$keep_mnt\E "
859 ."&& cd \Q$ENV{CRUNCH_TMP}\E "
860 # These environment variables get used explicitly later in
861 # $command. No tool is expected to read these values directly.
862 .q{&& MEM=$(awk '($1 == "MemTotal:"){print $2}' </proc/meminfo) }
863 .q{&& SWAP=$(awk '($1 == "SwapTotal:"){print $2}' </proc/meminfo) }
864 ."&& MEMLIMIT=\$(( (\$MEM * 95) / ($ENV{CRUNCH_NODE_SLOTS} * 100) )) "
865 ."&& let SWAPLIMIT=\$MEMLIMIT+\$SWAP "
866 .q{&& declare -a VOLUMES=() }
867 .q{&& if which crunchrunner >/dev/null ; then VOLUMES+=("--volume=$(which crunchrunner):/usr/local/bin/crunchrunner") ; fi }
868 .q{&& if test -f /etc/ssl/certs/ca-certificates.crt ; then VOLUMES+=("--volume=/etc/ssl/certs/ca-certificates.crt:/etc/arvados/ca-certificates.crt") ; }
869 .q{elif test -f /etc/pki/tls/certs/ca-bundle.crt ; then VOLUMES+=("--volume=/etc/pki/tls/certs/ca-bundle.crt:/etc/arvados/ca-certificates.crt") ; fi };
871 $command .= "&& exec arv-mount --read-write --mount-by-pdh=by_pdh --mount-tmp=tmp --crunchstat-interval=10 --allow-other $arv_file_cache \Q$keep_mnt\E --exec ";
872 $ENV{TASK_KEEPMOUNT} = "$keep_mnt/by_pdh";
873 $ENV{TASK_KEEPMOUNT_TMP} = "$keep_mnt/tmp";
877 my $containername = "$Jobstep->{arvados_task}->{uuid}-$Jobstep->{failures}";
878 my $cidfile = "$ENV{CRUNCH_TMP}/$containername.cid";
879 $command .= "crunchstat -cgroup-root=\Q$cgroup_root\E -cgroup-parent=docker -cgroup-cid=$cidfile -poll=10000 ";
880 $command .= "$docker_bin run $docker_run_args --name=$containername --attach=stdout --attach=stderr --attach=stdin -i \Q$dockeruserarg\E --cidfile=$cidfile --sig-proxy ";
881 # We only set memory limits if Docker lets us limit both memory and swap.
882 # Memory limits alone have been supported longer, but subprocesses tend
883 # to get SIGKILL if they exceed that without any swap limit set.
884 # See #5642 for additional background.
885 if ($docker_limitmem) {
886 $command .= "--memory=\${MEMLIMIT}k --memory-swap=\${SWAPLIMIT}k ";
889 # The source tree and $destdir directory (which we have
890 # installed on the worker host) are available in the container,
891 # under the same path.
892 $command .= "--volume=\Q$ENV{CRUNCH_SRC}:$ENV{CRUNCH_SRC}:ro\E ";
893 $command .= "--volume=\Q$ENV{CRUNCH_INSTALL}:$ENV{CRUNCH_INSTALL}:ro\E ";
895 # Currently, we make the "by_pdh" directory in arv-mount's mount
896 # point appear at /keep inside the container (instead of using
897 # the same path as the host like we do with CRUNCH_SRC and
898 # CRUNCH_INSTALL). However, crunch scripts and utilities must
899 # not rely on this. They must use $TASK_KEEPMOUNT.
900 $command .= "--volume=\Q$ENV{TASK_KEEPMOUNT}:/keep:ro\E ";
901 $ENV{TASK_KEEPMOUNT} = "/keep";
903 # Ditto TASK_KEEPMOUNT_TMP, as /keep_tmp.
904 $command .= "--volume=\Q$ENV{TASK_KEEPMOUNT_TMP}:/keep_tmp\E ";
905 $ENV{TASK_KEEPMOUNT_TMP} = "/keep_tmp";
907 # TASK_WORK is almost exactly like a docker data volume: it
908 # starts out empty, is writable, and persists until no
909 # containers use it any more. We don't use --volumes-from to
910 # share it with other containers: it is only accessible to this
911 # task, and it goes away when this task stops.
913 # However, a docker data volume is writable only by root unless
914 # the mount point already happens to exist in the container with
915 # different permissions. Therefore, we [1] assume /tmp already
916 # exists in the image and is writable by the crunch user; [2]
917 # avoid putting TASK_WORK inside CRUNCH_TMP (which won't be
918 # writable if they are created by docker while setting up the
919 # other --volumes); and [3] create $TASK_WORK inside the
920 # container using $build_script.
921 $command .= "--volume=/tmp ";
922 $ENV{"TASK_WORK"} = "/tmp/crunch-job-task-work/$childslotname";
923 $ENV{"HOME"} = $ENV{"TASK_WORK"};
924 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
926 # TODO: Share a single JOB_WORK volume across all task
927 # containers on a given worker node, and delete it when the job
928 # ends (and, in case that doesn't work, when the next job
931 # For now, use the same approach as TASK_WORK above.
932 $ENV{"JOB_WORK"} = "/tmp/crunch-job-work";
934 # Bind mount the crunchrunner binary and host TLS certificates file into
936 $command .= '"${VOLUMES[@]}" ';
938 while (my ($env_key, $env_val) = each %ENV)
940 if ($env_key =~ /^(ARVADOS|CRUNCH|JOB|TASK)_/) {
941 $command .= "--env=\Q$env_key=$env_val\E ";
944 $command .= "--env=\QHOME=$ENV{HOME}\E ";
945 $command .= "\Q$docker_hash\E ";
947 if ($Job->{arvados_sdk_version}) {
949 $command .= "perl - \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E";
951 $command .= "/bin/sh -c \'python -c " .
952 '"from pkg_resources import get_distribution as get; print \"Using Arvados SDK version\", get(\"arvados-python-client\").version"' .
953 ">&2 2>/dev/null; " .
954 "mkdir -p \"$ENV{JOB_WORK}\" \"$ENV{TASK_WORK}\" && " .
955 "if which stdbuf >/dev/null ; then " .
956 " exec $stdbuf \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E ;" .
958 " exec \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E ;" .
963 $command .= "crunchstat -cgroup-root=\Q$cgroup_root\E -poll=10000 ";
965 $command .= "perl - $ENV{CRUNCH_SRC}/crunch_scripts/" . $Job->{"script"};
968 my @execargs = ('bash', '-c', $command);
969 srun (\@srunargs, \@execargs, undef, $build_script);
970 # exec() failed, we assume nothing happened.
971 die "srun() failed on build script\n";
974 if (!defined $childpid)
985 jobstepname => "$job_id.$id.$childpid",
987 croak ("assert failed: \$slot[$childslot]->{'pid'} exists") if exists $slot[$childslot]->{pid};
988 $slot[$childslot]->{pid} = $childpid;
990 Log ($id, "job_task ".$Jobstep->{'arvados_task'}->{'uuid'});
991 Log ($id, "child $childpid started on $childslotname");
992 $Jobstep->{starttime} = time;
993 $Jobstep->{node} = $childnode->{name};
994 $Jobstep->{slotindex} = $childslot;
995 delete $Jobstep->{stderr};
996 delete $Jobstep->{finishtime};
997 delete $Jobstep->{tempfail};
999 $Jobstep->{'arvados_task'}->{started_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{starttime});
1000 $Jobstep->{'arvados_task'}->save;
1002 splice @jobstep_todo, $todo_ptr, 1;
1005 $progress_is_dirty = 1;
1009 ($round_num_freeslots > @freeslot && $todo_ptr+1 > $#jobstep_todo))
1011 last THISROUND if $main::please_freeze;
1012 if ($main::please_info)
1014 $main::please_info = 0;
1016 create_output_collection();
1018 update_progress_stats();
1023 if (!$gotsome || ($latest_refresh + 2 < scalar time))
1025 check_refresh_wanted();
1027 update_progress_stats();
1029 elsif (time - $progress_stats_updated >= 30 || $progress_is_dirty)
1031 update_progress_stats();
1034 select (undef, undef, undef, 0.1);
1036 $working_slot_count = scalar(grep { $_->{node}->{fail_count} == 0 &&
1037 $_->{node}->{hold_count} < 4 } @slot);
1038 if (($thisround_failed_multiple >= 8 && $thisround_succeeded == 0) ||
1039 ($thisround_failed_multiple >= 16 && $thisround_failed_multiple > $thisround_succeeded))
1041 my $message = "Repeated failure rate too high ($thisround_failed_multiple/"
1042 .($thisround_failed+$thisround_succeeded)
1043 .") -- giving up on this round";
1044 Log (undef, $message);
1048 # move slots from freeslot to holdslot (or back to freeslot) if necessary
1049 for (my $i=$#freeslot; $i>=0; $i--) {
1050 if ($slot[$freeslot[$i]]->{node}->{hold_until} > scalar time) {
1051 push @holdslot, (splice @freeslot, $i, 1);
1054 for (my $i=$#holdslot; $i>=0; $i--) {
1055 if ($slot[$holdslot[$i]]->{node}->{hold_until} <= scalar time) {
1056 push @freeslot, (splice @holdslot, $i, 1);
1060 # give up if no nodes are succeeding
1061 if ($working_slot_count < 1) {
1062 Log(undef, "Every node has failed -- giving up");
1069 push @freeslot, splice @holdslot;
1070 map { $slot[$freeslot[$_]]->{node}->{losing_streak} = 0 } (0..$#freeslot);
1073 Log (undef, "wait for last ".(scalar keys %proc)." children to finish");
1076 if ($main::please_continue) {
1077 $main::please_continue = 0;
1080 $main::please_info = 0, freeze(), create_output_collection(), save_meta(1) if $main::please_info;
1082 if (!reapchildren())
1084 check_refresh_wanted();
1086 update_progress_stats();
1087 select (undef, undef, undef, 0.1);
1088 killem (keys %proc) if $main::please_freeze;
1092 update_progress_stats();
1093 freeze_if_want_freeze();
1096 if (!defined $main::success)
1098 if (!@jobstep_todo) {
1100 } elsif ($working_slot_count < 1) {
1101 save_output_collection();
1103 exit(EX_RETRY_UNLOCKED);
1104 } elsif ($thisround_succeeded == 0 &&
1105 ($thisround_failed == 0 || $thisround_failed > 4)) {
1106 my $message = "stop because $thisround_failed tasks failed and none succeeded";
1107 Log (undef, $message);
1112 goto ONELEVEL if !defined $main::success;
1115 release_allocation();
1117 my $collated_output = save_output_collection();
1118 Log (undef, "finish");
1123 if ($collated_output && $main::success) {
1124 $final_state = 'Complete';
1126 $final_state = 'Failed';
1128 $Job->update_attributes('state' => $final_state);
1130 exit (($final_state eq 'Complete') ? 0 : 1);
1134 sub update_progress_stats
1136 $progress_stats_updated = time;
1137 return if !$progress_is_dirty;
1138 my ($todo, $done, $running) = (scalar @jobstep_todo,
1139 scalar @jobstep_done,
1140 scalar keys(%proc));
1141 $Job->{'tasks_summary'} ||= {};
1142 $Job->{'tasks_summary'}->{'todo'} = $todo;
1143 $Job->{'tasks_summary'}->{'done'} = $done;
1144 $Job->{'tasks_summary'}->{'running'} = $running;
1145 $Job->update_attributes('tasks_summary' => $Job->{'tasks_summary'});
1146 Log (undef, "status: $done done, $running running, $todo todo");
1147 $progress_is_dirty = 0;
1154 my $children_reaped = 0;
1155 my @successful_task_uuids = ();
1157 while((my $pid = waitpid (-1, WNOHANG)) > 0)
1159 my $childstatus = $?;
1161 my $whatslot = ($slot[$proc{$pid}->{slot}]->{node}->{name}
1163 . $slot[$proc{$pid}->{slot}]->{cpu});
1164 my $jobstepidx = $proc{$pid}->{jobstepidx};
1167 my $elapsed = time - $proc{$pid}->{time};
1168 my $Jobstep = $jobstep[$jobstepidx];
1170 my $exitvalue = $childstatus >> 8;
1171 my $exitinfo = "exit ".exit_status_s($childstatus);
1172 $Jobstep->{'arvados_task'}->reload;
1173 my $task_success = $Jobstep->{'arvados_task'}->{success};
1175 Log ($jobstepidx, "child $pid on $whatslot $exitinfo success=$task_success");
1177 if (!defined $task_success) {
1178 # task did not indicate one way or the other --> fail
1179 Log($jobstepidx, sprintf(
1180 "ERROR: Task process exited %s, but never updated its task record to indicate success and record its output.",
1181 exit_status_s($childstatus)));
1182 $Jobstep->{'arvados_task'}->{success} = 0;
1183 $Jobstep->{'arvados_task'}->save;
1190 $temporary_fail ||= $Jobstep->{tempfail};
1191 $temporary_fail ||= ($exitvalue == TASK_TEMPFAIL);
1193 ++$thisround_failed;
1194 ++$thisround_failed_multiple if $Jobstep->{'failures'} >= 1;
1196 # Check for signs of a failed or misconfigured node
1197 if (++$slot[$proc{$pid}->{slot}]->{node}->{losing_streak} >=
1198 2+$slot[$proc{$pid}->{slot}]->{node}->{ncpus}) {
1199 # Don't count this against jobstep failure thresholds if this
1200 # node is already suspected faulty and srun exited quickly
1201 if ($slot[$proc{$pid}->{slot}]->{node}->{hold_until} &&
1203 Log ($jobstepidx, "blaming failure on suspect node " .
1204 $slot[$proc{$pid}->{slot}]->{node}->{name});
1205 $temporary_fail ||= 1;
1207 ban_node_by_slot($proc{$pid}->{slot});
1210 Log ($jobstepidx, sprintf('failure (#%d, %s) after %d seconds',
1211 ++$Jobstep->{'failures'},
1212 $temporary_fail ? 'temporary' : 'permanent',
1215 if (!$temporary_fail || $Jobstep->{'failures'} >= 3) {
1216 # Give up on this task, and the whole job
1219 # Put this task back on the todo queue
1220 push @jobstep_todo, $jobstepidx;
1221 $Job->{'tasks_summary'}->{'failed'}++;
1225 push @successful_task_uuids, $Jobstep->{'arvados_task'}->{uuid};
1226 ++$thisround_succeeded;
1227 $slot[$proc{$pid}->{slot}]->{node}->{losing_streak} = 0;
1228 $slot[$proc{$pid}->{slot}]->{node}->{hold_until} = 0;
1229 $slot[$proc{$pid}->{slot}]->{node}->{fail_count} = 0;
1230 push @jobstep_done, $jobstepidx;
1231 Log ($jobstepidx, "success in $elapsed seconds");
1233 $Jobstep->{exitcode} = $childstatus;
1234 $Jobstep->{finishtime} = time;
1235 $Jobstep->{'arvados_task'}->{finished_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{finishtime});
1236 $Jobstep->{'arvados_task'}->save;
1237 process_stderr_final ($jobstepidx);
1238 Log ($jobstepidx, sprintf("task output (%d bytes): %s",
1239 length($Jobstep->{'arvados_task'}->{output}),
1240 $Jobstep->{'arvados_task'}->{output}));
1242 close $reader{$jobstepidx};
1243 delete $reader{$jobstepidx};
1244 delete $slot[$proc{$pid}->{slot}]->{pid};
1245 push @freeslot, $proc{$pid}->{slot};
1248 $progress_is_dirty = 1;
1251 if (scalar(@successful_task_uuids) > 0)
1253 Log (undef, sprintf("%d tasks exited (%d succeeded), checking for new tasks from API server.", $children_reaped, scalar(@successful_task_uuids)));
1255 my $newtask_list = [];
1256 my $newtask_results;
1258 $newtask_results = api_call(
1260 'filters' => [["created_by_job_task_uuid","in",\@successful_task_uuids]],
1261 'order' => 'qsequence',
1262 'offset' => scalar(@$newtask_list),
1264 push(@$newtask_list, @{$newtask_results->{items}});
1265 } while (@{$newtask_results->{items}});
1266 Log (undef, sprintf("Got %d new tasks from API server.", scalar(@$newtask_list)));
1267 foreach my $arvados_task (@$newtask_list) {
1269 'level' => $arvados_task->{'sequence'},
1271 'arvados_task' => $arvados_task
1273 push @jobstep, $jobstep;
1274 push @jobstep_todo, $#jobstep;
1278 return $children_reaped;
1281 sub check_refresh_wanted
1283 my @stat = stat $ENV{"CRUNCH_REFRESH_TRIGGER"};
1285 $stat[9] > $latest_refresh &&
1286 # ...and we have actually locked the job record...
1287 $job_id eq $Job->{'uuid'}) {
1288 $latest_refresh = scalar time;
1289 my $Job2 = api_call("jobs/get", uuid => $jobspec);
1290 for my $attr ('cancelled_at',
1291 'cancelled_by_user_uuid',
1292 'cancelled_by_client_uuid',
1294 $Job->{$attr} = $Job2->{$attr};
1296 if ($Job->{'state'} ne "Running") {
1297 if ($Job->{'state'} eq "Cancelled") {
1298 Log (undef, "Job cancelled at " . $Job->{'cancelled_at'} . " by user " . $Job->{'cancelled_by_user_uuid'});
1300 Log (undef, "Job state unexpectedly changed to " . $Job->{'state'});
1303 $main::please_freeze = 1;
1310 my $last_squeue_check = $squeue_checked;
1312 # Do not call `squeue` or check the kill list more than once every
1314 return if $last_squeue_check > time - 15;
1315 $squeue_checked = time;
1317 # Look for children from which we haven't received stderr data since
1318 # the last squeue check. If no such children exist, all procs are
1319 # alive and there's no need to even look at squeue.
1321 # As long as the crunchstat poll interval (10s) is shorter than the
1322 # squeue check interval (15s) this should make the squeue check an
1324 my $silent_procs = 0;
1325 for my $js (map {$jobstep[$_->{jobstepidx}]} values %proc)
1327 if (!exists($js->{stderr_at}))
1329 $js->{stderr_at} = 0;
1331 if ($js->{stderr_at} < $last_squeue_check)
1336 return if $silent_procs == 0;
1338 # use killem() on procs whose killtime is reached
1339 while (my ($pid, $procinfo) = each %proc)
1341 my $js = $jobstep[$procinfo->{jobstepidx}];
1342 if (exists $procinfo->{killtime}
1343 && $procinfo->{killtime} <= time
1344 && $js->{stderr_at} < $last_squeue_check)
1347 if ($js->{stderr_at}) {
1348 $sincewhen = " in last " . (time - $js->{stderr_at}) . "s";
1350 Log($procinfo->{jobstepidx}, "killing orphaned srun process $pid (task not in slurm queue, no stderr received$sincewhen)");
1357 # here is an opportunity to check for mysterious problems with local procs
1361 # Get a list of steps still running. Note: squeue(1) says --steps
1362 # selects a format (which we override anyway) and allows us to
1363 # specify which steps we're interested in (which we don't).
1364 # Importantly, it also changes the meaning of %j from "job name" to
1365 # "step name" and (although this isn't mentioned explicitly in the
1366 # docs) switches from "one line per job" mode to "one line per step"
1367 # mode. Without it, we'd just get a list of one job, instead of a
1369 my @squeue = `squeue --jobs=\Q$ENV{SLURM_JOB_ID}\E --steps --format='%j' --noheader`;
1372 Log(undef, "warning: squeue exit status $? ($!)");
1377 # which of my jobsteps are running, according to squeue?
1379 for my $jobstepname (@squeue)
1381 $ok{$jobstepname} = 1;
1384 # Check for child procs >60s old and not mentioned by squeue.
1385 while (my ($pid, $procinfo) = each %proc)
1387 if ($procinfo->{time} < time - 60
1388 && $procinfo->{jobstepname}
1389 && !exists $ok{$procinfo->{jobstepname}}
1390 && !exists $procinfo->{killtime})
1392 # According to slurm, this task has ended (successfully or not)
1393 # -- but our srun child hasn't exited. First we must wait (30
1394 # seconds) in case this is just a race between communication
1395 # channels. Then, if our srun child process still hasn't
1396 # terminated, we'll conclude some slurm communication
1397 # error/delay has caused the task to die without notifying srun,
1398 # and we'll kill srun ourselves.
1399 $procinfo->{killtime} = time + 30;
1400 Log($procinfo->{jobstepidx}, "notice: task is not in slurm queue but srun process $pid has not exited");
1407 # If a node fails in a multi-node "srun" call during job setup, the call
1408 # may hang instead of exiting with a nonzero code. This function checks
1409 # "sinfo" for the health of the nodes that were allocated and ensures that
1410 # they are all still in the "alloc" state. If a node that is allocated to
1411 # this job is not in "alloc" state, then set please_freeze.
1413 # This is only called from srun_sync() for node configuration. If a
1414 # node fails doing actual work, there are other recovery mechanisms.
1416 # Do not call `sinfo` more than once every 15 seconds.
1417 return if $sinfo_checked > time - 15;
1418 $sinfo_checked = time;
1420 # The output format "%t" means output node states.
1421 my @sinfo = `sinfo --nodes=\Q$ENV{SLURM_NODELIST}\E --noheader -o "%t"`;
1424 Log(undef, "warning: sinfo exit status $? ($!)");
1431 if ($_ != "alloc" && $_ != "alloc*") {
1432 $main::please_freeze = 1;
1437 sub release_allocation
1441 Log (undef, "release job allocation");
1442 system "scancel $ENV{SLURM_JOB_ID}";
1451 my $sel = IO::Select->new();
1452 foreach my $jobstepidx (keys %reader)
1454 my $fd = $reader{$jobstepidx};
1456 $fd_job{$fd} = $jobstepidx;
1458 if (my $stdout_fd = $jobstep[$jobstepidx]->{stdout_r}) {
1459 $sel->add($stdout_fd);
1460 $fd_job{$stdout_fd} = $jobstepidx;
1463 # select on all reader fds with 0.1s timeout
1464 my @ready_fds = $sel->can_read(0.1);
1465 foreach my $fd (@ready_fds)
1468 if (0 < sysread ($fd, $buf, 65536))
1471 print STDERR $buf if $ENV{CRUNCH_DEBUG};
1473 my $jobstepidx = $fd_job{$fd};
1474 if ($jobstep[$jobstepidx]->{stdout_r} == $fd) {
1475 $jobstep[$jobstepidx]->{stdout_captured} .= $buf;
1479 $jobstep[$jobstepidx]->{stderr_at} = time;
1480 $jobstep[$jobstepidx]->{stderr} .= $buf;
1482 # Consume everything up to the last \n
1483 preprocess_stderr ($jobstepidx);
1485 if (length ($jobstep[$jobstepidx]->{stderr}) > 16384)
1487 # If we get a lot of stderr without a newline, chop off the
1488 # front to avoid letting our buffer grow indefinitely.
1489 substr ($jobstep[$jobstepidx]->{stderr},
1490 0, length($jobstep[$jobstepidx]->{stderr}) - 8192) = "";
1498 # Consume all full lines of stderr for a jobstep. Everything after the
1499 # last newline will remain in $jobstep[$jobstepidx]->{stderr} after
1501 sub preprocess_stderr
1503 my $jobstepidx = shift;
1504 # slotindex is only defined for children running Arvados job tasks.
1505 # Be prepared to handle the undef case (for setup srun calls, etc.).
1506 my $job_slot_index = $jobstep[$jobstepidx]->{slotindex};
1508 while ($jobstep[$jobstepidx]->{stderr} =~ /^(.*?)\n/) {
1510 substr $jobstep[$jobstepidx]->{stderr}, 0, 1+length($line), "";
1511 Log ($jobstepidx, "stderr $line");
1512 if ($line =~ /srun: error: (SLURM job $ENV{SLURM_JOB_ID} has expired|Unable to confirm allocation for job $ENV{SLURM_JOB_ID})/) {
1513 # If the allocation is revoked, we can't possibly continue, so mark all
1514 # nodes as failed. This will cause the overall exit code to be
1515 # EX_RETRY_UNLOCKED instead of failure so that crunch_dispatch can re-run
1517 $main::please_freeze = 1;
1518 foreach my $st (@slot) {
1519 $st->{node}->{fail_count}++;
1522 elsif ($line =~ /srun: error: (Node failure on|Aborting, .*\bio error\b)/) {
1523 $jobstep[$jobstepidx]->{tempfail} = 1;
1524 if (defined($job_slot_index)) {
1525 $slot[$job_slot_index]->{node}->{fail_count}++;
1526 ban_node_by_slot($job_slot_index);
1529 elsif ($line =~ /srun: error: (Unable to create job step|.*: Communication connection failure)/) {
1530 $jobstep[$jobstepidx]->{tempfail} = 1;
1531 ban_node_by_slot($job_slot_index) if (defined($job_slot_index));
1533 elsif ($line =~ /\bKeep(Read|Write|Request)Error:/) {
1534 $jobstep[$jobstepidx]->{tempfail} = 1;
1540 sub process_stderr_final
1542 my $jobstepidx = shift;
1543 preprocess_stderr ($jobstepidx);
1546 Log ($jobstepidx, "stderr $_");
1547 } split ("\n", $jobstep[$jobstepidx]->{stderr});
1548 $jobstep[$jobstepidx]->{stderr} = '';
1555 if (!open($keep, "-|", "arv-get", "--retries", retry_count(), $hash)) {
1556 Log(undef, "fetch_block run error from arv-get $hash: $!");
1559 my $output_block = "";
1562 my $bytes = sysread($keep, $buf, 1024 * 1024);
1563 if (!defined $bytes) {
1564 Log(undef, "fetch_block read error from arv-get: $!");
1565 $output_block = undef;
1567 } elsif ($bytes == 0) {
1568 # sysread returns 0 at the end of the pipe.
1571 # some bytes were read into buf.
1572 $output_block .= $buf;
1577 Log(undef, "fetch_block arv-get exited " . exit_status_s($?));
1578 $output_block = undef;
1580 return $output_block;
1583 # Create a collection by concatenating the output of all tasks (each
1584 # task's output is either a manifest fragment, a locator for a
1585 # manifest fragment stored in Keep, or nothing at all). Return the
1586 # portable_data_hash of the new collection.
1587 sub create_output_collection
1589 Log (undef, "collate");
1591 my ($child_out, $child_in);
1592 my $pid = open2($child_out, $child_in, 'python', '-c', q{
1595 print (arvados.api("v1").collections().
1596 create(body={"manifest_text": sys.stdin.read()}).
1597 execute(num_retries=int(sys.argv[1]))["portable_data_hash"])
1601 my $manifest_size = 0;
1605 my $output = $_->{'arvados_task'}->{output};
1606 next if (!defined($output));
1608 if ($output =~ /^[0-9a-f]{32}(\+\S+)*$/) {
1609 $next_write = fetch_block($output);
1611 $next_write = $output;
1613 if (defined($next_write)) {
1614 if (!defined(syswrite($child_in, $next_write))) {
1615 # There's been an error writing. Stop the loop.
1616 # We'll log details about the exit code later.
1619 $manifest_size += length($next_write);
1622 my $uuid = $_->{'arvados_task'}->{'uuid'};
1623 Log (undef, "Error retrieving '$output' output by task $task_idx ($uuid)");
1628 Log(undef, "collated output manifest text to send to API server is $manifest_size bytes with access tokens");
1631 my $s = IO::Select->new($child_out);
1632 if ($s->can_read(120)) {
1633 sysread($child_out, $joboutput, 1024 * 1024);
1636 Log(undef, "output collection creation exited " . exit_status_s($?));
1642 Log (undef, "timed out while creating output collection");
1643 foreach my $signal (2, 2, 2, 15, 15, 9) {
1644 kill($signal, $pid);
1645 last if waitpid($pid, WNOHANG) == -1;
1654 # Calls create_output_collection, logs the result, and returns it.
1655 # If that was successful, save that as the output in the job record.
1656 sub save_output_collection {
1657 my $collated_output = create_output_collection();
1659 if (!$collated_output) {
1660 Log(undef, "Failed to write output collection");
1663 Log(undef, "job output $collated_output");
1664 $Job->update_attributes('output' => $collated_output);
1666 return $collated_output;
1673 my $sig = 2; # SIGINT first
1674 if (exists $proc{$_}->{"sent_$sig"} &&
1675 time - $proc{$_}->{"sent_$sig"} > 4)
1677 $sig = 15; # SIGTERM if SIGINT doesn't work
1679 if (exists $proc{$_}->{"sent_$sig"} &&
1680 time - $proc{$_}->{"sent_$sig"} > 4)
1682 $sig = 9; # SIGKILL if SIGTERM doesn't work
1684 if (!exists $proc{$_}->{"sent_$sig"})
1686 Log ($proc{$_}->{jobstepidx}, "sending 2x signal $sig to pid $_");
1688 select (undef, undef, undef, 0.1);
1691 kill $sig, $_; # srun wants two SIGINT to really interrupt
1693 $proc{$_}->{"sent_$sig"} = time;
1694 $proc{$_}->{"killedafter"} = time - $proc{$_}->{"time"};
1704 vec($bits,fileno($_),1) = 1;
1710 # Send log output to Keep via arv-put.
1712 # $log_pipe_in and $log_pipe_out are the input and output filehandles to the arv-put pipe.
1713 # $log_pipe_out_buf is a string containing all output read from arv-put so far.
1714 # $log_pipe_out_select is an IO::Select object around $log_pipe_out.
1715 # $log_pipe_pid is the pid of the arv-put subprocess.
1717 # The only functions that should access these variables directly are:
1719 # log_writer_start($logfilename)
1720 # Starts an arv-put pipe, reading data on stdin and writing it to
1721 # a $logfilename file in an output collection.
1723 # log_writer_read_output([$timeout])
1724 # Read output from $log_pipe_out and append it to $log_pipe_out_buf.
1725 # Passes $timeout to the select() call, with a default of 0.01.
1726 # Returns the result of the last read() call on $log_pipe_out, or
1727 # -1 if read() wasn't called because select() timed out.
1728 # Only other log_writer_* functions should need to call this.
1730 # log_writer_send($txt)
1731 # Writes $txt to the output log collection.
1733 # log_writer_finish()
1734 # Closes the arv-put pipe and returns the output that it produces.
1736 # log_writer_is_active()
1737 # Returns a true value if there is currently a live arv-put
1738 # process, false otherwise.
1740 my ($log_pipe_in, $log_pipe_out, $log_pipe_out_buf, $log_pipe_out_select,
1743 sub log_writer_start($)
1745 my $logfilename = shift;
1746 $log_pipe_pid = open2($log_pipe_out, $log_pipe_in,
1750 '--filename', $logfilename,
1752 $log_pipe_out_buf = "";
1753 $log_pipe_out_select = IO::Select->new($log_pipe_out);
1756 sub log_writer_read_output {
1757 my $timeout = shift || 0.01;
1759 while ($read && $log_pipe_out_select->can_read($timeout)) {
1760 $read = read($log_pipe_out, $log_pipe_out_buf, 65536,
1761 length($log_pipe_out_buf));
1763 if (!defined($read)) {
1764 Log(undef, "error reading log manifest from arv-put: $!");
1769 sub log_writer_send($)
1772 print $log_pipe_in $txt;
1773 log_writer_read_output();
1776 sub log_writer_finish()
1778 return unless $log_pipe_pid;
1780 close($log_pipe_in);
1782 my $logger_failed = 0;
1783 my $read_result = log_writer_read_output(120);
1784 if ($read_result == -1) {
1785 $logger_failed = -1;
1786 Log (undef, "timed out reading from 'arv-put'");
1787 } elsif ($read_result != 0) {
1788 $logger_failed = -2;
1789 Log(undef, "failed to read arv-put log manifest to EOF");
1792 waitpid($log_pipe_pid, 0);
1794 $logger_failed ||= $?;
1795 Log(undef, "log_writer_finish: arv-put exited " . exit_status_s($?))
1798 close($log_pipe_out);
1799 my $arv_put_output = $logger_failed ? undef : $log_pipe_out_buf;
1800 $log_pipe_pid = $log_pipe_in = $log_pipe_out = $log_pipe_out_buf =
1801 $log_pipe_out_select = undef;
1803 return $arv_put_output;
1806 sub log_writer_is_active() {
1807 return $log_pipe_pid;
1810 sub Log # ($jobstepidx, $logmessage)
1812 my ($jobstepidx, $logmessage) = @_;
1813 if ($logmessage =~ /\n/) {
1814 for my $line (split (/\n/, $_[1])) {
1815 Log ($jobstepidx, $line);
1819 my $fh = select STDERR; $|=1; select $fh;
1821 if (defined($jobstepidx) && exists($jobstep[$jobstepidx]->{arvados_task})) {
1822 $task_qseq = $jobstepidx;
1824 my $message = sprintf ("%s %d %s %s", $job_id, $$, $task_qseq, $logmessage);
1825 $message =~ s{([^ -\176])}{"\\" . sprintf ("%03o", ord($1))}ge;
1828 if (log_writer_is_active() || -t STDERR) {
1829 my @gmtime = gmtime;
1830 $datetime = sprintf ("%04d-%02d-%02d_%02d:%02d:%02d",
1831 $gmtime[5]+1900, $gmtime[4]+1, @gmtime[3,2,1,0]);
1833 print STDERR ((-t STDERR) ? ($datetime." ".$message) : $message);
1835 if (log_writer_is_active()) {
1836 log_writer_send($datetime . " " . $message);
1843 my ($package, $file, $line) = caller;
1844 my $message = "@_ at $file line $line\n";
1845 Log (undef, $message);
1846 freeze() if @jobstep_todo;
1847 create_output_collection() if @jobstep_todo;
1857 if ($Job->{'state'} eq 'Cancelled') {
1858 $Job->update_attributes('finished_at' => scalar gmtime);
1860 $Job->update_attributes('state' => 'Failed');
1867 my $justcheckpoint = shift; # false if this will be the last meta saved
1868 return if $justcheckpoint; # checkpointing is not relevant post-Warehouse.pm
1869 return unless log_writer_is_active();
1870 my $log_manifest = log_writer_finish();
1871 return unless defined($log_manifest);
1874 my $prev_log_coll = api_call("collections/get", uuid => $Job->{log});
1875 $log_manifest = $prev_log_coll->{manifest_text} . $log_manifest;
1878 my $log_coll = api_call(
1879 "collections/create", ensure_unique_name => 1, collection => {
1880 manifest_text => $log_manifest,
1881 owner_uuid => $Job->{owner_uuid},
1882 name => sprintf("Log from %s job %s", $Job->{script}, $Job->{uuid}),
1884 Log(undef, "log collection is " . $log_coll->{portable_data_hash});
1885 $Job->update_attributes('log' => $log_coll->{portable_data_hash});
1889 sub freeze_if_want_freeze
1891 if ($main::please_freeze)
1893 release_allocation();
1896 # kill some srun procs before freeze+stop
1897 map { $proc{$_} = {} } @_;
1900 killem (keys %proc);
1901 select (undef, undef, undef, 0.1);
1903 while (($died = waitpid (-1, WNOHANG)) > 0)
1905 delete $proc{$died};
1910 create_output_collection();
1920 Log (undef, "Freeze not implemented");
1927 croak ("Thaw not implemented");
1943 $s =~ s{\\(.)}{$1 eq "n" ? "\n" : $1}ge;
1949 my $srunargs = shift;
1950 my $execargs = shift;
1951 my $opts = shift || {};
1954 my $label = exists $opts->{label} ? $opts->{label} : "@$execargs";
1955 Log (undef, "$label: start");
1957 my ($stderr_r, $stderr_w);
1958 pipe $stderr_r, $stderr_w or croak("pipe() failed: $!");
1960 my ($stdout_r, $stdout_w);
1961 pipe $stdout_r, $stdout_w or croak("pipe() failed: $!");
1963 my $srunpid = fork();
1968 fcntl($stderr_w, F_SETFL, 0) or croak($!); # no close-on-exec
1969 fcntl($stdout_w, F_SETFL, 0) or croak($!);
1970 open(STDERR, ">&", $stderr_w);
1971 open(STDOUT, ">&", $stdout_w);
1972 srun ($srunargs, $execargs, $opts, $stdin);
1978 set_nonblocking($stderr_r);
1979 set_nonblocking($stdout_r);
1981 # Add entries to @jobstep and %proc so check_squeue() and
1982 # freeze_if_want_freeze() can treat it like a job task process.
1986 stderr_captured => '',
1987 stdout_r => $stdout_r,
1988 stdout_captured => '',
1990 my $jobstepidx = $#jobstep;
1992 jobstepidx => $jobstepidx,
1994 $reader{$jobstepidx} = $stderr_r;
1996 while ($srunpid != waitpid ($srunpid, WNOHANG)) {
1997 my $busy = readfrompipes();
1998 if (!$busy || ($latest_refresh + 2 < scalar time)) {
1999 check_refresh_wanted();
2004 select(undef, undef, undef, 0.1);
2006 killem(keys %proc) if $main::please_freeze;
2010 1 while readfrompipes();
2011 process_stderr_final ($jobstepidx);
2013 Log (undef, "$label: exit ".exit_status_s($exited));
2017 delete $proc{$srunpid};
2018 delete $reader{$jobstepidx};
2020 my $j = pop @jobstep;
2021 # If the srun showed signs of tempfail, ensure the caller treats that as a
2023 if ($main::please_freeze || $j->{tempfail}) {
2026 return ($exited, $j->{stdout_captured}, $j->{stderr_captured});
2032 my $srunargs = shift;
2033 my $execargs = shift;
2034 my $opts = shift || {};
2036 my $args = $have_slurm ? [@$srunargs, @$execargs] : $execargs;
2038 $Data::Dumper::Terse = 1;
2039 $Data::Dumper::Indent = 0;
2040 my $show_cmd = Dumper($args);
2041 $show_cmd =~ s/(TOKEN\\*=)[^\s\']+/${1}[...]/g;
2042 $show_cmd =~ s/\n/ /g;
2043 if ($opts->{fork}) {
2044 Log(undef, "starting: $show_cmd");
2046 # This is a child process: parent is in charge of reading our
2047 # stderr and copying it to Log() if needed.
2048 warn "starting: $show_cmd\n";
2051 if (defined $stdin) {
2052 my $child = open STDIN, "-|";
2053 defined $child or die "no fork: $!";
2055 print $stdin or die $!;
2056 close STDOUT or die $!;
2061 return system (@$args) if $opts->{fork};
2064 warn "ENV size is ".length(join(" ",%ENV));
2065 die "exec failed: $!: @$args";
2069 sub ban_node_by_slot {
2070 # Don't start any new jobsteps on this node for 60 seconds
2072 $slot[$slotid]->{node}->{hold_until} = 60 + scalar time;
2073 $slot[$slotid]->{node}->{hold_count}++;
2074 Log (undef, "backing off node " . $slot[$slotid]->{node}->{name} . " for 60 seconds");
2079 my ($lockfile, $error_message) = @_;
2080 open L, ">", $lockfile or croak("$lockfile: $!");
2081 if (!flock L, LOCK_EX|LOCK_NB) {
2082 croak("Can't lock $lockfile: $error_message\n");
2086 sub find_docker_image {
2087 # Given a Keep locator, check to see if it contains a Docker image.
2088 # If so, return its stream name and Docker hash.
2089 # If not, return undef for both values.
2090 my $locator = shift;
2091 my ($streamname, $filename);
2092 my $image = api_call("collections/get", uuid => $locator);
2094 foreach my $line (split(/\n/, $image->{manifest_text})) {
2095 my @tokens = split(/\s+/, $line);
2097 $streamname = shift(@tokens);
2098 foreach my $filedata (grep(/^\d+:\d+:/, @tokens)) {
2099 if (defined($filename)) {
2100 return (undef, undef); # More than one file in the Collection.
2102 $filename = (split(/:/, $filedata, 3))[2];
2107 if (defined($filename) and ($filename =~ /^((?:sha256:)?[0-9A-Fa-f]{64})\.tar$/)) {
2108 return ($streamname, $1);
2110 return (undef, undef);
2115 # Calculate the number of times an operation should be retried,
2116 # assuming exponential backoff, and that we're willing to retry as
2117 # long as tasks have been running. Enforce a minimum of 3 retries.
2118 my ($starttime, $endtime, $timediff, $retries);
2120 $starttime = $jobstep[0]->{starttime};
2121 $endtime = $jobstep[-1]->{finishtime};
2123 if (!defined($starttime)) {
2125 } elsif (!defined($endtime)) {
2126 $timediff = time - $starttime;
2128 $timediff = ($endtime - $starttime) - (time - $endtime);
2130 if ($timediff > 0) {
2131 $retries = int(log($timediff) / log(2));
2133 $retries = 1; # Use the minimum.
2135 return ($retries > 3) ? $retries : 3;
2139 # Pass in two function references.
2140 # This method will be called with the remaining arguments.
2141 # If it dies, retry it with exponential backoff until it succeeds,
2142 # or until the current retry_count is exhausted. After each failure
2143 # that can be retried, the second function will be called with
2144 # the current try count (0-based), next try time, and error message.
2145 my $operation = shift;
2146 my $retry_callback = shift;
2147 my $retries = retry_count();
2148 foreach my $try_count (0..$retries) {
2149 my $next_try = time + (2 ** $try_count);
2150 my $result = eval { $operation->(@_); };
2153 } elsif ($try_count < $retries) {
2154 $retry_callback->($try_count, $next_try, $@);
2155 my $sleep_time = $next_try - time;
2156 sleep($sleep_time) if ($sleep_time > 0);
2159 # Ensure the error message ends in a newline, so Perl doesn't add
2160 # retry_op's line number to it.
2166 # Pass in a /-separated API method name, and arguments for it.
2167 # This function will call that method, retrying as needed until
2168 # the current retry_count is exhausted, with a log on the first failure.
2169 my $method_name = shift;
2170 my $log_api_retry = sub {
2171 my ($try_count, $next_try_at, $errmsg) = @_;
2172 $errmsg =~ s/\s*\bat \Q$0\E line \d+\.?\s*//;
2173 $errmsg =~ s/\s/ /g;
2174 $errmsg =~ s/\s+$//;
2176 if ($next_try_at < time) {
2177 $retry_msg = "Retrying.";
2179 my $next_try_fmt = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($next_try_at);
2180 $retry_msg = "Retrying at $next_try_fmt.";
2182 Log(undef, "API method $method_name failed: $errmsg. $retry_msg");
2185 foreach my $key (split(/\//, $method_name)) {
2186 $method = $method->{$key};
2188 return retry_op(sub { $method->execute(@_); }, $log_api_retry, @_);
2192 # Given a $?, return a human-readable exit code string like "0" or
2193 # "1" or "0 with signal 1" or "1 with signal 11".
2194 my $exitcode = shift;
2195 my $s = $exitcode >> 8;
2196 if ($exitcode & 0x7f) {
2197 $s .= " with signal " . ($exitcode & 0x7f);
2199 if ($exitcode & 0x80) {
2200 $s .= " with core dump";
2205 sub handle_readall {
2206 # Pass in a glob reference to a file handle.
2207 # Read all its contents and return them as a string.
2208 my $fh_glob_ref = shift;
2210 return <$fh_glob_ref>;
2213 sub tar_filename_n {
2215 return sprintf("%s/git.%s.%d.tar", $ENV{CRUNCH_TMP}, $job_id, $n);
2218 sub add_git_archive {
2219 # Pass in a git archive command as a string or list, a la system().
2220 # This method will save its output to be included in the archive sent to the
2224 if (!open(GIT_ARCHIVE, ">", tar_filename_n($git_tar_count))) {
2225 croak("Failed to save git archive: $!");
2227 my $git_pid = open2(">&GIT_ARCHIVE", $git_input, @_);
2229 waitpid($git_pid, 0);
2232 croak("Failed to save git archive: git exited " . exit_status_s($?));
2236 sub combined_git_archive {
2237 # Combine all saved tar archives into a single archive, then return its
2238 # contents in a string. Return undef if no archives have been saved.
2239 if ($git_tar_count < 1) {
2242 my $base_tar_name = tar_filename_n(1);
2243 foreach my $tar_to_append (map { tar_filename_n($_); } (2..$git_tar_count)) {
2244 my $tar_exit = system("tar", "-Af", $base_tar_name, $tar_to_append);
2245 if ($tar_exit != 0) {
2246 croak("Error preparing build archive: tar -A exited " .
2247 exit_status_s($tar_exit));
2250 if (!open(GIT_TAR, "<", $base_tar_name)) {
2251 croak("Could not open build archive: $!");
2253 my $tar_contents = handle_readall(\*GIT_TAR);
2255 return $tar_contents;
2258 sub set_nonblocking {
2260 my $flags = fcntl ($fh, F_GETFL, 0) or croak ($!);
2261 fcntl ($fh, F_SETFL, $flags | O_NONBLOCK) or croak ($!);
2267 # This is crunch-job's internal dispatch script. crunch-job running on the API
2268 # server invokes this script on individual compute nodes, or localhost if we're
2269 # running a job locally. It gets called in two modes:
2271 # * No arguments: Installation mode. Read a tar archive from the DATA
2272 # file handle; it includes the Crunch script's source code, and
2273 # maybe SDKs as well. Those should be installed in the proper
2274 # locations. This runs outside of any Docker container, so don't try to
2275 # introspect Crunch's runtime environment.
2277 # * With arguments: Crunch script run mode. This script should set up the
2278 # environment, then run the command specified in the arguments. This runs
2279 # inside any Docker container.
2282 use File::Path qw( make_path remove_tree );
2283 use POSIX qw(getcwd);
2285 use constant TASK_TEMPFAIL => 111;
2287 # Map SDK subdirectories to the path environments they belong to.
2288 my %SDK_ENVVARS = ("perl/lib" => "PERLLIB", "ruby/lib" => "RUBYLIB");
2290 my $destdir = $ENV{"CRUNCH_SRC"};
2291 my $archive_hash = $ENV{"CRUNCH_GIT_ARCHIVE_HASH"};
2292 my $repo = $ENV{"CRUNCH_SRC_URL"};
2293 my $install_dir = $ENV{"CRUNCH_INSTALL"} || (getcwd() . "/opt");
2294 my $job_work = $ENV{"JOB_WORK"};
2295 my $task_work = $ENV{"TASK_WORK"};
2297 open(STDOUT_ORIG, ">&", STDOUT);
2298 open(STDERR_ORIG, ">&", STDERR);
2300 for my $dir ($destdir, $job_work, $task_work) {
2303 -e $dir or die "Failed to create temporary directory ($dir): $!";
2308 remove_tree($task_work, {keep_root => 1});
2311 ### Crunch script run mode
2313 # We want to do routine logging during task 0 only. This gives the user
2314 # the information they need, but avoids repeating the information for every
2317 if ($ENV{TASK_SEQUENCE} eq "0") {
2320 printf STDERR_ORIG "[Crunch] $msg\n", @_;
2326 my $python_src = "$install_dir/python";
2327 my $venv_dir = "$job_work/.arvados.venv";
2328 my $venv_built = -e "$venv_dir/bin/activate";
2329 if ((!$venv_built) and (-d $python_src) and can_run("virtualenv")) {
2330 shell_or_die(undef, "virtualenv", "--quiet", "--system-site-packages",
2331 "--python=python2.7", $venv_dir);
2332 shell_or_die(TASK_TEMPFAIL, "$venv_dir/bin/pip", "--quiet", "install", "-I", $python_src);
2334 $Log->("Built Python SDK virtualenv");
2337 my @pysdk_version_cmd = ("python", "-c",
2338 "from pkg_resources import get_distribution as get; print get('arvados-python-client').version");
2340 $Log->("Running in Python SDK virtualenv");
2341 @pysdk_version_cmd = ();
2342 my $orig_argv = join(" ", map { quotemeta($_); } @ARGV);
2343 @ARGV = ("/bin/sh", "-ec",
2344 ". \Q$venv_dir/bin/activate\E; exec $orig_argv");
2345 } elsif (-d $python_src) {
2346 $Log->("Warning: virtualenv not found inside Docker container default " .
2347 "\$PATH. Can't install Python SDK.");
2350 if (@pysdk_version_cmd) {
2351 open(my $pysdk_version_pipe, "-|", @pysdk_version_cmd);
2352 my $pysdk_version = <$pysdk_version_pipe>;
2353 close($pysdk_version_pipe);
2355 chomp($pysdk_version);
2356 $Log->("Using Arvados SDK version $pysdk_version");
2358 # A lot could've gone wrong here, but pretty much all of it means that
2359 # Python won't be able to load the Arvados SDK.
2360 $Log->("Warning: Arvados SDK not found");
2364 while (my ($sdk_dir, $sdk_envkey) = each(%SDK_ENVVARS)) {
2365 my $sdk_path = "$install_dir/$sdk_dir";
2367 if ($ENV{$sdk_envkey}) {
2368 $ENV{$sdk_envkey} = "$sdk_path:" . $ENV{$sdk_envkey};
2370 $ENV{$sdk_envkey} = $sdk_path;
2372 $Log->("Arvados SDK added to %s", $sdk_envkey);
2377 die "Cannot exec `@ARGV`: $!";
2380 ### Installation mode
2381 open L, ">", "$destdir.lock" or die "$destdir.lock: $!";
2383 if (readlink ("$destdir.archive_hash") eq $archive_hash && -d $destdir) {
2384 # This exact git archive (source + arvados sdk) is already installed
2385 # here, so there's no need to reinstall it.
2387 # We must consume our DATA section, though: otherwise the process
2388 # feeding it to us will get SIGPIPE.
2390 while (read(DATA, $buf, 65536)) { }
2395 unlink "$destdir.archive_hash";
2399 # Ignore SIGPIPE: we check retval of close() instead. See perlipc(1).
2400 local $SIG{PIPE} = "IGNORE";
2401 warn "Extracting archive: $archive_hash\n";
2402 # --ignore-zeros is necessary sometimes: depending on how much NUL
2403 # padding tar -A put on our combined archive (which in turn depends
2404 # on the length of the component archives) tar without
2405 # --ignore-zeros will exit before consuming stdin and cause close()
2406 # to fail on the resulting SIGPIPE.
2407 if (!open(TARX, "|-", "tar", "--ignore-zeros", "-xC", $destdir)) {
2408 die "Error launching 'tar -xC $destdir': $!";
2410 # If we send too much data to tar in one write (> 4-5 MiB), it stops, and we
2411 # get SIGPIPE. We must feed it data incrementally.
2413 while (read(DATA, $tar_input, 65536)) {
2414 print TARX $tar_input;
2417 die "'tar -xC $destdir' exited $?: $!";
2423 my $sdk_root = "$destdir/.arvados.sdk/sdk";
2425 foreach my $sdk_lang (("python",
2426 map { (split /\//, $_, 2)[0]; } keys(%SDK_ENVVARS))) {
2427 if (-d "$sdk_root/$sdk_lang") {
2428 if (!rename("$sdk_root/$sdk_lang", "$install_dir/$sdk_lang")) {
2429 die "Failed to install $sdk_lang SDK: $!";
2435 my $python_dir = "$install_dir/python";
2436 if ((-d $python_dir) and can_run("python2.7")) {
2437 open(my $egg_info_pipe, "-|",
2438 "python2.7 \Q$python_dir/setup.py\E egg_info 2>&1 >/dev/null");
2439 my @egg_info_errors = <$egg_info_pipe>;
2440 close($egg_info_pipe);
2443 if (@egg_info_errors and (($egg_info_errors[-1] =~ /\bgit\b/) or ($egg_info_errors[-1] =~ /\[Errno 2\]/))) {
2444 # egg_info apparently failed because it couldn't ask git for a build tag.
2445 # Specify no build tag.
2446 open(my $pysdk_cfg, ">>", "$python_dir/setup.cfg");
2447 print $pysdk_cfg "\n[egg_info]\ntag_build =\n";
2450 my $egg_info_exit = $? >> 8;
2451 foreach my $errline (@egg_info_errors) {
2454 warn "python setup.py egg_info failed: exit $egg_info_exit";
2455 exit ($egg_info_exit || 1);
2460 # Hide messages from the install script (unless it fails: shell_or_die
2461 # will show $destdir.log in that case).
2462 open(STDOUT, ">>", "$destdir.log");
2463 open(STDERR, ">&", STDOUT);
2465 if (-e "$destdir/crunch_scripts/install") {
2466 shell_or_die (undef, "$destdir/crunch_scripts/install", $install_dir);
2467 } elsif (!-e "./install.sh" && -e "./tests/autotests.sh") {
2469 shell_or_die (undef, "./tests/autotests.sh", $install_dir);
2470 } elsif (-e "./install.sh") {
2471 shell_or_die (undef, "./install.sh", $install_dir);
2474 if ($archive_hash) {
2475 unlink "$destdir.archive_hash.new";
2476 symlink ($archive_hash, "$destdir.archive_hash.new") or die "$destdir.archive_hash.new: $!";
2477 rename ("$destdir.archive_hash.new", "$destdir.archive_hash") or die "$destdir.archive_hash: $!";
2483 my $command_name = shift;
2484 open(my $which, "-|", "which", $command_name);
2485 while (<$which>) { }
2492 my $exitcode = shift;
2494 if ($ENV{"DEBUG"}) {
2495 print STDERR "@_\n";
2497 if (system (@_) != 0) {
2500 my $exitstatus = sprintf("exit %d signal %d", $code >> 8, $code & 0x7f);
2501 open STDERR, ">&STDERR_ORIG";
2502 system ("cat $destdir.log >&2");
2503 warn "@_ failed ($err): $exitstatus";
2504 if (defined($exitcode)) {
2508 exit (($code >> 8) || 1);