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 = "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 $local_job = JSON::decode_json($jobspec);
176 # Make sure our workers (our slurm nodes, localhost, or whatever) are
177 # at least able to run basic commands: they aren't down or severely
180 if (($Job || $local_job)->{docker_image_locator}) {
181 $cmd = [$docker_bin, 'ps', '-q'];
183 Log(undef, "Sanity check is `@$cmd`");
184 srun(["srun", "--nodes=\Q$ENV{SLURM_NNODES}\E", "--ntasks-per-node=1"],
188 Log(undef, "Sanity check failed: ".exit_status_s($?));
191 Log(undef, "Sanity check OK");
194 my $User = api_call("users/current");
197 if (!$force_unlock) {
198 # Claim this job, and make sure nobody else does
199 eval { api_call("jobs/lock", uuid => $Job->{uuid}); };
201 Log(undef, "Error while locking job, exiting ".EX_TEMPFAIL);
210 map { croak ("No $_ specified") unless $local_job->{$_} }
211 qw(script script_version script_parameters);
214 $local_job->{'is_locked_by_uuid'} = $User->{'uuid'};
215 $local_job->{'started_at'} = gmtime;
216 $local_job->{'state'} = 'Running';
218 $Job = api_call("jobs/create", job => $local_job);
220 $job_id = $Job->{'uuid'};
222 my $keep_logfile = $job_id . '.log.txt';
223 log_writer_start($keep_logfile);
225 $Job->{'runtime_constraints'} ||= {};
226 $Job->{'runtime_constraints'}->{'max_tasks_per_node'} ||= 0;
227 my $max_ncpus = $Job->{'runtime_constraints'}->{'max_tasks_per_node'};
229 my $gem_versions = `gem list --quiet arvados-cli 2>/dev/null`;
231 $gem_versions =~ s/^arvados-cli \(/ with arvados-cli Gem version(s) /;
232 chomp($gem_versions);
233 chop($gem_versions); # Closing parentheses
238 "running from " . ((-e $0) ? realpath($0) : "stdin") . $gem_versions);
240 Log (undef, "check slurm allocation");
243 # Should use $ENV{SLURM_TASKS_PER_NODE} instead of sinfo? (eg. "4(x3),2,4(x2)")
247 my $localcpus = 0 + `grep -cw ^processor /proc/cpuinfo` || 1;
248 push @sinfo, "$localcpus localhost";
250 if (exists $ENV{SLURM_NODELIST})
252 push @sinfo, `sinfo -h --format='%c %N' --nodes=\Q$ENV{SLURM_NODELIST}\E`;
256 my ($ncpus, $slurm_nodelist) = split;
257 $ncpus = $max_ncpus if $max_ncpus && $ncpus > $max_ncpus;
260 while ($slurm_nodelist =~ s/^([^\[,]+?(\[.*?\])?)(,|$)//)
263 if ($nodelist =~ /\[((\d+)(-(\d+))?(,(\d+)(-(\d+))?)*)\]/)
266 foreach (split (",", $ranges))
279 push @nodelist, map {
281 $n =~ s/\[[-,\d]+\]/$_/;
288 push @nodelist, $nodelist;
291 foreach my $nodename (@nodelist)
293 Log (undef, "node $nodename - $ncpus slots");
294 my $node = { name => $nodename,
296 # The number of consecutive times a task has been dispatched
297 # to this node and failed.
299 # The number of consecutive times that SLURM has reported
300 # a node failure since the last successful task.
302 # Don't dispatch work to this node until this time
303 # (in seconds since the epoch) has passed.
305 foreach my $cpu (1..$ncpus)
307 push @slot, { node => $node,
311 push @node, @nodelist;
316 # Ensure that we get one jobstep running on each allocated node before
317 # we start overloading nodes with concurrent steps
319 @slot = sort { $a->{cpu} <=> $b->{cpu} } @slot;
322 $Job->update_attributes(
323 'tasks_summary' => { 'failed' => 0,
328 Log (undef, "start");
329 $SIG{'INT'} = sub { $main::please_freeze = 1; };
330 $SIG{'QUIT'} = sub { $main::please_freeze = 1; };
331 $SIG{'TERM'} = \&croak;
332 $SIG{'TSTP'} = sub { $main::please_freeze = 1; };
333 $SIG{'ALRM'} = sub { $main::please_info = 1; };
334 $SIG{'CONT'} = sub { $main::please_continue = 1; };
335 $SIG{'HUP'} = sub { $main::please_refresh = 1; };
337 $main::please_freeze = 0;
338 $main::please_info = 0;
339 $main::please_continue = 0;
340 $main::please_refresh = 0;
341 my $jobsteps_must_output_keys = 0; # becomes 1 when any task outputs a key
343 grep { $ENV{$1} = $2 if /^(NOCACHE.*?)=(.*)/ } split ("\n", $$Job{knobs});
344 $ENV{"CRUNCH_JOB_UUID"} = $job_id;
345 $ENV{"JOB_UUID"} = $job_id;
348 my @jobstep_todo = ();
349 my @jobstep_done = ();
350 my @jobstep_tomerge = ();
351 my $jobstep_tomerge_level = 0;
352 my $squeue_checked = 0;
353 my $latest_refresh = scalar time;
357 if (defined $Job->{thawedfromkey})
359 thaw ($Job->{thawedfromkey});
363 my $first_task = api_call("job_tasks/create", job_task => {
364 'job_uuid' => $Job->{'uuid'},
369 push @jobstep, { 'level' => 0,
371 'arvados_task' => $first_task,
373 push @jobstep_todo, 0;
379 must_lock_now("$ENV{CRUNCH_TMP}/.lock", "a job is already running here.");
382 my $build_script = handle_readall(\*DATA);
383 my $nodelist = join(",", @node);
384 my $git_tar_count = 0;
386 if (!defined $no_clear_tmp) {
387 # Clean out crunch_tmp/work, crunch_tmp/opt, crunch_tmp/src*
388 Log (undef, "Clean work dirs");
390 my $cleanpid = fork();
393 # Find FUSE mounts under $CRUNCH_TMP and unmount them.
394 # Then clean up work directories.
395 # TODO: When #5036 is done and widely deployed, we can limit mount's
396 # -t option to simply fuse.keep.
397 srun (["srun", "--nodelist=$nodelist", "-D", $ENV{'TMPDIR'}],
398 ['bash', '-ec', '-o', 'pipefail', 'mount -t fuse,fuse.keep | awk "(index(\$3, \"$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']);
403 last if $cleanpid == waitpid (-1, WNOHANG);
404 freeze_if_want_freeze ($cleanpid);
405 select (undef, undef, undef, 0.1);
408 Log(undef, "Clean work dirs: exit ".exit_status_s($?));
409 exit(EX_RETRY_UNLOCKED);
413 # If this job requires a Docker image, install that.
414 my ($docker_locator, $docker_stream, $docker_hash, $docker_limitmem, $dockeruserarg);
415 if ($docker_locator = $Job->{docker_image_locator}) {
416 ($docker_stream, $docker_hash) = find_docker_image($docker_locator);
419 croak("No Docker image hash found from locator $docker_locator");
421 $docker_stream =~ s/^\.//;
422 my $docker_install_script = qq{
423 if ! $docker_bin images -q --no-trunc --all | grep -qxF \Q$docker_hash\E; then
424 arv-get \Q$docker_locator$docker_stream/$docker_hash.tar\E | $docker_bin load
427 my $docker_pid = fork();
428 if ($docker_pid == 0)
430 srun (["srun", "--nodelist=" . join(',', @node)],
431 ["/bin/sh", "-ec", $docker_install_script]);
436 last if $docker_pid == waitpid (-1, WNOHANG);
437 freeze_if_want_freeze ($docker_pid);
438 select (undef, undef, undef, 0.1);
442 croak("Installing Docker image from $docker_locator exited "
446 # Determine whether this version of Docker supports memory+swap limits.
447 srun(["srun", "--nodelist=" . $node[0]],
448 ["/bin/sh", "-ec", "$docker_bin run --help | grep -qe --memory-swap="],
450 $docker_limitmem = ($? == 0);
452 # Find a non-root Docker user to use.
453 # Tries the default user for the container, then 'crunch', then 'nobody',
454 # testing for whether the actual user id is non-zero. This defends against
455 # mistakes but not malice, but we intend to harden the security in the future
456 # so we don't want anyone getting used to their jobs running as root in their
458 my @tryusers = ("", "crunch", "nobody");
459 foreach my $try_user (@tryusers) {
461 if ($try_user eq "") {
462 Log(undef, "Checking if container default user is not UID 0");
465 Log(undef, "Checking if user '$try_user' is not UID 0");
466 $try_user_arg = "--user=$try_user";
468 srun(["srun", "--nodelist=" . $node[0]],
470 "a=`$docker_bin run $try_user_arg $docker_hash id --user` && " .
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; $attempts++) {
666 Log(undef, "Run install script on all workers");
668 my @srunargs = ("srun",
669 "--nodelist=$nodelist",
670 "-D", $ENV{'TMPDIR'}, "--job-name=$job_id");
671 my @execargs = ("sh", "-c",
672 "mkdir -p $ENV{CRUNCH_INSTALL} && cd $ENV{CRUNCH_TMP} && perl -");
674 $ENV{"CRUNCH_GIT_ARCHIVE_HASH"} = md5_hex($git_archive);
675 my ($install_stderr_r, $install_stderr_w);
676 pipe $install_stderr_r, $install_stderr_w or croak("pipe() failed: $!");
677 set_nonblocking($install_stderr_r);
678 my $installpid = fork();
679 if ($installpid == 0)
681 close($install_stderr_r);
682 fcntl($install_stderr_w, F_SETFL, 0) or croak($!); # no close-on-exec
683 open(STDOUT, ">&", $install_stderr_w);
684 open(STDERR, ">&", $install_stderr_w);
685 srun (\@srunargs, \@execargs, {}, $build_script . $git_archive);
688 close($install_stderr_w);
689 # Tell freeze_if_want_freeze how to kill the child, otherwise the
690 # "waitpid(installpid)" loop won't get interrupted by a freeze:
691 $proc{$installpid} = {};
693 # Track whether anything appears on stderr other than slurm errors
694 # ("srun: ...") and the "starting: ..." message printed by the
695 # srun subroutine itself:
696 my $stderr_anything_from_script = 0;
697 my $match_our_own_errors = '^(srun: error: |starting: \[)';
698 while ($installpid != waitpid(-1, WNOHANG)) {
699 freeze_if_want_freeze ($installpid);
700 # Wait up to 0.1 seconds for something to appear on stderr, then
701 # do a non-blocking read.
702 my $bits = fhbits($install_stderr_r);
703 select ($bits, undef, $bits, 0.1);
704 if (0 < sysread ($install_stderr_r, $stderr_buf, 8192, length($stderr_buf)))
706 while ($stderr_buf =~ /^(.*?)\n/) {
708 substr $stderr_buf, 0, 1+length($line), "";
709 Log(undef, "stderr $line");
710 if ($line !~ /$match_our_own_errors/) {
711 $stderr_anything_from_script = 1;
716 delete $proc{$installpid};
717 $install_exited = $?;
718 close($install_stderr_r);
719 if (length($stderr_buf) > 0) {
720 if ($stderr_buf !~ /$match_our_own_errors/) {
721 $stderr_anything_from_script = 1;
723 Log(undef, "stderr $stderr_buf")
726 Log (undef, "Install script exited ".exit_status_s($install_exited));
727 last if $install_exited == 0 || $main::please_freeze;
728 # If the install script fails but doesn't print an error message,
729 # the next thing anyone is likely to do is just run it again in
730 # case it was a transient problem like "slurm communication fails
731 # because the network isn't reliable enough". So we'll just do
732 # that ourselves (up to 3 attempts in total). OTOH, if there is an
733 # error message, the problem is more likely to have a real fix and
734 # we should fail the job so the fixing process can start, instead
735 # of doing 2 more attempts.
736 last if $stderr_anything_from_script;
739 foreach my $tar_filename (map { tar_filename_n($_); } (1..$git_tar_count)) {
740 unlink($tar_filename);
743 if ($install_exited != 0) {
748 foreach (qw (script script_version script_parameters runtime_constraints))
752 (ref($Job->{$_}) ? JSON::encode_json($Job->{$_}) : $Job->{$_}));
754 foreach (split (/\n/, $Job->{knobs}))
756 Log (undef, "knob " . $_);
761 $main::success = undef;
767 my $thisround_succeeded = 0;
768 my $thisround_failed = 0;
769 my $thisround_failed_multiple = 0;
770 my $working_slot_count = scalar(@slot);
772 @jobstep_todo = sort { $jobstep[$a]->{level} <=> $jobstep[$b]->{level}
773 or $a <=> $b } @jobstep_todo;
774 my $level = $jobstep[$jobstep_todo[0]]->{level};
776 my $initial_tasks_this_level = 0;
777 foreach my $id (@jobstep_todo) {
778 $initial_tasks_this_level++ if ($jobstep[$id]->{level} == $level);
781 # If the number of tasks scheduled at this level #T is smaller than the number
782 # of slots available #S, only use the first #T slots, or the first slot on
783 # each node, whichever number is greater.
785 # When we dispatch tasks later, we'll allocate whole-node resources like RAM
786 # based on these numbers. Using fewer slots makes more resources available
787 # to each individual task, which should normally be a better strategy when
788 # there are fewer of them running with less parallelism.
790 # Note that this calculation is not redone if the initial tasks at
791 # this level queue more tasks at the same level. This may harm
792 # overall task throughput for that level.
794 if ($initial_tasks_this_level < @node) {
795 @freeslot = (0..$#node);
796 } elsif ($initial_tasks_this_level < @slot) {
797 @freeslot = (0..$initial_tasks_this_level - 1);
799 @freeslot = (0..$#slot);
801 my $round_num_freeslots = scalar(@freeslot);
803 my %round_max_slots = ();
804 for (my $ii = $#freeslot; $ii >= 0; $ii--) {
805 my $this_slot = $slot[$freeslot[$ii]];
806 my $node_name = $this_slot->{node}->{name};
807 $round_max_slots{$node_name} ||= $this_slot->{cpu};
808 last if (scalar(keys(%round_max_slots)) >= @node);
811 Log(undef, "start level $level with $round_num_freeslots slots");
814 my $progress_is_dirty = 1;
815 my $progress_stats_updated = 0;
817 update_progress_stats();
821 for (my $todo_ptr = 0; $todo_ptr <= $#jobstep_todo; $todo_ptr ++)
823 # Don't create new tasks if we already know the job's final result.
824 last if defined($main::success);
826 my $id = $jobstep_todo[$todo_ptr];
827 my $Jobstep = $jobstep[$id];
828 if ($Jobstep->{level} != $level)
833 pipe $reader{$id}, "writer" or croak("pipe() failed: $!");
834 set_nonblocking($reader{$id});
836 my $childslot = $freeslot[0];
837 my $childnode = $slot[$childslot]->{node};
838 my $childslotname = join (".",
839 $slot[$childslot]->{node}->{name},
840 $slot[$childslot]->{cpu});
842 my $childpid = fork();
845 $SIG{'INT'} = 'DEFAULT';
846 $SIG{'QUIT'} = 'DEFAULT';
847 $SIG{'TERM'} = 'DEFAULT';
849 foreach (values (%reader))
853 fcntl ("writer", F_SETFL, 0) or croak ($!); # no close-on-exec
854 open(STDOUT,">&writer");
855 open(STDERR,">&writer");
860 delete $ENV{"GNUPGHOME"};
861 $ENV{"TASK_UUID"} = $Jobstep->{'arvados_task'}->{'uuid'};
862 $ENV{"TASK_QSEQUENCE"} = $id;
863 $ENV{"TASK_SEQUENCE"} = $level;
864 $ENV{"JOB_SCRIPT"} = $Job->{script};
865 while (my ($param, $value) = each %{$Job->{script_parameters}}) {
866 $param =~ tr/a-z/A-Z/;
867 $ENV{"JOB_PARAMETER_$param"} = $value;
869 $ENV{"TASK_SLOT_NODE"} = $slot[$childslot]->{node}->{name};
870 $ENV{"TASK_SLOT_NUMBER"} = $slot[$childslot]->{cpu};
871 $ENV{"TASK_WORK"} = $ENV{"CRUNCH_TMP"}."/task/$childslotname";
872 $ENV{"HOME"} = $ENV{"TASK_WORK"};
873 $ENV{"TASK_KEEPMOUNT"} = $ENV{"TASK_WORK"}.".keep";
874 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
875 $ENV{"CRUNCH_NODE_SLOTS"} = $round_max_slots{$ENV{TASK_SLOT_NODE}};
876 $ENV{"PATH"} = $ENV{"CRUNCH_INSTALL"} . "/bin:" . $ENV{"PATH"};
882 "--nodelist=".$childnode->{name},
883 qw(-n1 -c1 -N1 -D), $ENV{'TMPDIR'},
884 "--job-name=$job_id.$id.$$",
887 my $stdbuf = " stdbuf --output=0 --error=0 ";
890 "if [ -e $ENV{TASK_WORK} ]; then rm -rf $ENV{TASK_WORK}; fi; "
891 ."mkdir -p $ENV{CRUNCH_TMP} $ENV{JOB_WORK} $ENV{TASK_WORK} $ENV{TASK_KEEPMOUNT} "
892 ."&& cd $ENV{CRUNCH_TMP} "
893 # These environment variables get used explicitly later in
894 # $command. No tool is expected to read these values directly.
895 .q{&& MEM=$(awk '($1 == "MemTotal:"){print $2}' </proc/meminfo) }
896 .q{&& SWAP=$(awk '($1 == "SwapTotal:"){print $2}' </proc/meminfo) }
897 ."&& MEMLIMIT=\$(( (\$MEM * 95) / ($ENV{CRUNCH_NODE_SLOTS} * 100) )) "
898 ."&& let SWAPLIMIT=\$MEMLIMIT+\$SWAP ";
899 $command .= "&& exec arv-mount --by-pdh --allow-other $ENV{TASK_KEEPMOUNT} --exec ";
902 my $containername = "$Jobstep->{arvados_task}->{uuid}-$Jobstep->{failures}";
903 my $cidfile = "$ENV{CRUNCH_TMP}/$containername.cid";
904 $command .= "crunchstat -cgroup-root=/sys/fs/cgroup -cgroup-parent=docker -cgroup-cid=$cidfile -poll=10000 ";
905 $command .= "$docker_bin run --name=$containername --attach=stdout --attach=stderr --attach=stdin -i \Q$dockeruserarg\E --cidfile=$cidfile --sig-proxy ";
906 # We only set memory limits if Docker lets us limit both memory and swap.
907 # Memory limits alone have been supported longer, but subprocesses tend
908 # to get SIGKILL if they exceed that without any swap limit set.
909 # See #5642 for additional background.
910 if ($docker_limitmem) {
911 $command .= "--memory=\${MEMLIMIT}k --memory-swap=\${SWAPLIMIT}k ";
914 # The source tree and $destdir directory (which we have
915 # installed on the worker host) are available in the container,
916 # under the same path.
917 $command .= "--volume=\Q$ENV{CRUNCH_SRC}:$ENV{CRUNCH_SRC}:ro\E ";
918 $command .= "--volume=\Q$ENV{CRUNCH_INSTALL}:$ENV{CRUNCH_INSTALL}:ro\E ";
920 # Currently, we make arv-mount's mount point appear at /keep
921 # inside the container (instead of using the same path as the
922 # host like we do with CRUNCH_SRC and CRUNCH_INSTALL). However,
923 # crunch scripts and utilities must not rely on this. They must
924 # use $TASK_KEEPMOUNT.
925 $command .= "--volume=\Q$ENV{TASK_KEEPMOUNT}:/keep:ro\E ";
926 $ENV{TASK_KEEPMOUNT} = "/keep";
928 # TASK_WORK is almost exactly like a docker data volume: it
929 # starts out empty, is writable, and persists until no
930 # containers use it any more. We don't use --volumes-from to
931 # share it with other containers: it is only accessible to this
932 # task, and it goes away when this task stops.
934 # However, a docker data volume is writable only by root unless
935 # the mount point already happens to exist in the container with
936 # different permissions. Therefore, we [1] assume /tmp already
937 # exists in the image and is writable by the crunch user; [2]
938 # avoid putting TASK_WORK inside CRUNCH_TMP (which won't be
939 # writable if they are created by docker while setting up the
940 # other --volumes); and [3] create $TASK_WORK inside the
941 # container using $build_script.
942 $command .= "--volume=/tmp ";
943 $ENV{"TASK_WORK"} = "/tmp/crunch-job-task-work/$childslotname";
944 $ENV{"HOME"} = $ENV{"TASK_WORK"};
945 $ENV{"TASK_TMPDIR"} = $ENV{"TASK_WORK"}; # deprecated
947 # TODO: Share a single JOB_WORK volume across all task
948 # containers on a given worker node, and delete it when the job
949 # ends (and, in case that doesn't work, when the next job
952 # For now, use the same approach as TASK_WORK above.
953 $ENV{"JOB_WORK"} = "/tmp/crunch-job-work";
955 while (my ($env_key, $env_val) = each %ENV)
957 if ($env_key =~ /^(ARVADOS|CRUNCH|JOB|TASK)_/) {
958 $command .= "--env=\Q$env_key=$env_val\E ";
961 $command .= "--env=\QHOME=$ENV{HOME}\E ";
962 $command .= "\Q$docker_hash\E ";
964 if ($Job->{arvados_sdk_version}) {
966 $command .= "perl - \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E";
968 $command .= "/bin/sh -c \'mkdir -p \"$ENV{JOB_WORK}\" \"$ENV{TASK_WORK}\" && " .
969 "if which stdbuf >/dev/null ; then " .
970 " exec $stdbuf \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E ;" .
972 " exec \Q$ENV{CRUNCH_SRC}/crunch_scripts/$Job->{script}\E ;" .
977 $command .= "crunchstat -cgroup-root=/sys/fs/cgroup -poll=10000 ";
979 $command .= "perl - $ENV{CRUNCH_SRC}/crunch_scripts/" . $Job->{"script"};
982 my @execargs = ('bash', '-c', $command);
983 srun (\@srunargs, \@execargs, undef, $build_script);
984 # exec() failed, we assume nothing happened.
985 die "srun() failed on build script\n";
988 if (!defined $childpid)
995 $proc{$childpid} = { jobstep => $id,
998 jobstepname => "$job_id.$id.$childpid",
1000 croak ("assert failed: \$slot[$childslot]->{'pid'} exists") if exists $slot[$childslot]->{pid};
1001 $slot[$childslot]->{pid} = $childpid;
1003 Log ($id, "job_task ".$Jobstep->{'arvados_task'}->{'uuid'});
1004 Log ($id, "child $childpid started on $childslotname");
1005 $Jobstep->{starttime} = time;
1006 $Jobstep->{node} = $childnode->{name};
1007 $Jobstep->{slotindex} = $childslot;
1008 delete $Jobstep->{stderr};
1009 delete $Jobstep->{finishtime};
1010 delete $Jobstep->{tempfail};
1012 $Jobstep->{'arvados_task'}->{started_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{starttime});
1013 $Jobstep->{'arvados_task'}->save;
1015 splice @jobstep_todo, $todo_ptr, 1;
1018 $progress_is_dirty = 1;
1022 ($round_num_freeslots > @freeslot && $todo_ptr+1 > $#jobstep_todo))
1024 last THISROUND if $main::please_freeze;
1025 if ($main::please_info)
1027 $main::please_info = 0;
1029 create_output_collection();
1031 update_progress_stats();
1036 if (!$gotsome || ($latest_refresh + 2 < scalar time))
1038 check_refresh_wanted();
1040 update_progress_stats();
1041 select (undef, undef, undef, 0.1);
1043 elsif (time - $progress_stats_updated >= 30 || $progress_is_dirty)
1045 update_progress_stats();
1047 $working_slot_count = scalar(grep { $_->{node}->{fail_count} == 0 &&
1048 $_->{node}->{hold_count} < 4 } @slot);
1049 if (($thisround_failed_multiple >= 8 && $thisround_succeeded == 0) ||
1050 ($thisround_failed_multiple >= 16 && $thisround_failed_multiple > $thisround_succeeded))
1052 my $message = "Repeated failure rate too high ($thisround_failed_multiple/"
1053 .($thisround_failed+$thisround_succeeded)
1054 .") -- giving up on this round";
1055 Log (undef, $message);
1059 # move slots from freeslot to holdslot (or back to freeslot) if necessary
1060 for (my $i=$#freeslot; $i>=0; $i--) {
1061 if ($slot[$freeslot[$i]]->{node}->{hold_until} > scalar time) {
1062 push @holdslot, (splice @freeslot, $i, 1);
1065 for (my $i=$#holdslot; $i>=0; $i--) {
1066 if ($slot[$holdslot[$i]]->{node}->{hold_until} <= scalar time) {
1067 push @freeslot, (splice @holdslot, $i, 1);
1071 # give up if no nodes are succeeding
1072 if ($working_slot_count < 1) {
1073 Log(undef, "Every node has failed -- giving up");
1080 push @freeslot, splice @holdslot;
1081 map { $slot[$freeslot[$_]]->{node}->{losing_streak} = 0 } (0..$#freeslot);
1084 Log (undef, "wait for last ".(scalar keys %proc)." children to finish");
1087 if ($main::please_continue) {
1088 $main::please_continue = 0;
1091 $main::please_info = 0, freeze(), create_output_collection(), save_meta(1) if $main::please_info;
1093 if (!reapchildren())
1095 check_refresh_wanted();
1097 update_progress_stats();
1098 select (undef, undef, undef, 0.1);
1099 killem (keys %proc) if $main::please_freeze;
1103 update_progress_stats();
1104 freeze_if_want_freeze();
1107 if (!defined $main::success)
1109 if (!@jobstep_todo) {
1111 } elsif ($working_slot_count < 1) {
1112 save_output_collection();
1114 exit(EX_RETRY_UNLOCKED);
1115 } elsif ($thisround_succeeded == 0 &&
1116 ($thisround_failed == 0 || $thisround_failed > 4)) {
1117 my $message = "stop because $thisround_failed tasks failed and none succeeded";
1118 Log (undef, $message);
1123 goto ONELEVEL if !defined $main::success;
1126 release_allocation();
1128 my $collated_output = save_output_collection();
1129 Log (undef, "finish");
1134 if ($collated_output && $main::success) {
1135 $final_state = 'Complete';
1137 $final_state = 'Failed';
1139 $Job->update_attributes('state' => $final_state);
1141 exit (($final_state eq 'Complete') ? 0 : 1);
1145 sub update_progress_stats
1147 $progress_stats_updated = time;
1148 return if !$progress_is_dirty;
1149 my ($todo, $done, $running) = (scalar @jobstep_todo,
1150 scalar @jobstep_done,
1151 scalar keys(%proc));
1152 $Job->{'tasks_summary'} ||= {};
1153 $Job->{'tasks_summary'}->{'todo'} = $todo;
1154 $Job->{'tasks_summary'}->{'done'} = $done;
1155 $Job->{'tasks_summary'}->{'running'} = $running;
1156 $Job->update_attributes('tasks_summary' => $Job->{'tasks_summary'});
1157 Log (undef, "status: $done done, $running running, $todo todo");
1158 $progress_is_dirty = 0;
1165 my $pid = waitpid (-1, WNOHANG);
1166 return 0 if $pid <= 0;
1168 my $whatslot = ($slot[$proc{$pid}->{slot}]->{node}->{name}
1170 . $slot[$proc{$pid}->{slot}]->{cpu});
1171 my $jobstepid = $proc{$pid}->{jobstep};
1172 my $elapsed = time - $proc{$pid}->{time};
1173 my $Jobstep = $jobstep[$jobstepid];
1175 my $childstatus = $?;
1176 my $exitvalue = $childstatus >> 8;
1177 my $exitinfo = "exit ".exit_status_s($childstatus);
1178 $Jobstep->{'arvados_task'}->reload;
1179 my $task_success = $Jobstep->{'arvados_task'}->{success};
1181 Log ($jobstepid, "child $pid on $whatslot $exitinfo success=$task_success");
1183 if (!defined $task_success) {
1184 # task did not indicate one way or the other --> fail
1185 $Jobstep->{'arvados_task'}->{success} = 0;
1186 $Jobstep->{'arvados_task'}->save;
1193 $temporary_fail ||= $Jobstep->{tempfail};
1194 $temporary_fail ||= ($exitvalue == TASK_TEMPFAIL);
1196 ++$thisround_failed;
1197 ++$thisround_failed_multiple if $Jobstep->{'failures'} >= 1;
1199 # Check for signs of a failed or misconfigured node
1200 if (++$slot[$proc{$pid}->{slot}]->{node}->{losing_streak} >=
1201 2+$slot[$proc{$pid}->{slot}]->{node}->{ncpus}) {
1202 # Don't count this against jobstep failure thresholds if this
1203 # node is already suspected faulty and srun exited quickly
1204 if ($slot[$proc{$pid}->{slot}]->{node}->{hold_until} &&
1206 Log ($jobstepid, "blaming failure on suspect node " .
1207 $slot[$proc{$pid}->{slot}]->{node}->{name});
1208 $temporary_fail ||= 1;
1210 ban_node_by_slot($proc{$pid}->{slot});
1213 Log ($jobstepid, sprintf('failure (#%d, %s) after %d seconds',
1214 ++$Jobstep->{'failures'},
1215 $temporary_fail ? 'temporary' : 'permanent',
1218 if (!$temporary_fail || $Jobstep->{'failures'} >= 3) {
1219 # Give up on this task, and the whole job
1222 # Put this task back on the todo queue
1223 push @jobstep_todo, $jobstepid;
1224 $Job->{'tasks_summary'}->{'failed'}++;
1228 ++$thisround_succeeded;
1229 $slot[$proc{$pid}->{slot}]->{node}->{losing_streak} = 0;
1230 $slot[$proc{$pid}->{slot}]->{node}->{hold_until} = 0;
1231 $slot[$proc{$pid}->{slot}]->{node}->{fail_count} = 0;
1232 push @jobstep_done, $jobstepid;
1233 Log ($jobstepid, "success in $elapsed seconds");
1235 $Jobstep->{exitcode} = $childstatus;
1236 $Jobstep->{finishtime} = time;
1237 $Jobstep->{'arvados_task'}->{finished_at} = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($Jobstep->{finishtime});
1238 $Jobstep->{'arvados_task'}->save;
1239 process_stderr ($jobstepid, $task_success);
1240 Log ($jobstepid, sprintf("task output (%d bytes): %s",
1241 length($Jobstep->{'arvados_task'}->{output}),
1242 $Jobstep->{'arvados_task'}->{output}));
1244 close $reader{$jobstepid};
1245 delete $reader{$jobstepid};
1246 delete $slot[$proc{$pid}->{slot}]->{pid};
1247 push @freeslot, $proc{$pid}->{slot};
1250 if ($task_success) {
1252 my $newtask_list = [];
1253 my $newtask_results;
1255 $newtask_results = api_call(
1258 'created_by_job_task_uuid' => $Jobstep->{'arvados_task'}->{uuid}
1260 'order' => 'qsequence',
1261 'offset' => scalar(@$newtask_list),
1263 push(@$newtask_list, @{$newtask_results->{items}});
1264 } while (@{$newtask_results->{items}});
1265 foreach my $arvados_task (@$newtask_list) {
1267 'level' => $arvados_task->{'sequence'},
1269 'arvados_task' => $arvados_task
1271 push @jobstep, $jobstep;
1272 push @jobstep_todo, $#jobstep;
1276 $progress_is_dirty = 1;
1280 sub check_refresh_wanted
1282 my @stat = stat $ENV{"CRUNCH_REFRESH_TRIGGER"};
1283 if (@stat && $stat[9] > $latest_refresh) {
1284 $latest_refresh = scalar time;
1285 my $Job2 = api_call("jobs/get", uuid => $jobspec);
1286 for my $attr ('cancelled_at',
1287 'cancelled_by_user_uuid',
1288 'cancelled_by_client_uuid',
1290 $Job->{$attr} = $Job2->{$attr};
1292 if ($Job->{'state'} ne "Running") {
1293 if ($Job->{'state'} eq "Cancelled") {
1294 Log (undef, "Job cancelled at " . $Job->{'cancelled_at'} . " by user " . $Job->{'cancelled_by_user_uuid'});
1296 Log (undef, "Job state unexpectedly changed to " . $Job->{'state'});
1299 $main::please_freeze = 1;
1306 my $last_squeue_check = $squeue_checked;
1308 # Do not call `squeue` or check the kill list more than once every
1310 return if $last_squeue_check > time - 15;
1311 $squeue_checked = time;
1313 # Look for children from which we haven't received stderr data since
1314 # the last squeue check. If no such children exist, all procs are
1315 # alive and there's no need to even look at squeue.
1317 # As long as the crunchstat poll interval (10s) is shorter than the
1318 # squeue check interval (15s) this should make the squeue check an
1320 my $silent_procs = 0;
1321 for my $jobstep (values %proc)
1323 if ($jobstep->{stderr_at} < $last_squeue_check)
1328 return if $silent_procs == 0;
1330 # use killem() on procs whose killtime is reached
1331 while (my ($pid, $jobstep) = each %proc)
1333 if (exists $jobstep->{killtime}
1334 && $jobstep->{killtime} <= time
1335 && $jobstep->{stderr_at} < $last_squeue_check)
1338 if ($jobstep->{stderr_at}) {
1339 $sincewhen = " in last " . (time - $jobstep->{stderr_at}) . "s";
1341 Log($jobstep->{jobstep}, "killing orphaned srun process $pid (task not in slurm queue, no stderr received$sincewhen)");
1348 # here is an opportunity to check for mysterious problems with local procs
1352 # Get a list of steps still running. Note: squeue(1) says --steps
1353 # selects a format (which we override anyway) and allows us to
1354 # specify which steps we're interested in (which we don't).
1355 # Importantly, it also changes the meaning of %j from "job name" to
1356 # "step name" and (although this isn't mentioned explicitly in the
1357 # docs) switches from "one line per job" mode to "one line per step"
1358 # mode. Without it, we'd just get a list of one job, instead of a
1360 my @squeue = `squeue --jobs=\Q$ENV{SLURM_JOB_ID}\E --steps --format='%j' --noheader`;
1363 Log(undef, "warning: squeue exit status $? ($!)");
1368 # which of my jobsteps are running, according to squeue?
1370 for my $jobstepname (@squeue)
1372 $ok{$jobstepname} = 1;
1375 # Check for child procs >60s old and not mentioned by squeue.
1376 while (my ($pid, $jobstep) = each %proc)
1378 if ($jobstep->{time} < time - 60
1379 && $jobstep->{jobstepname}
1380 && !exists $ok{$jobstep->{jobstepname}}
1381 && !exists $jobstep->{killtime})
1383 # According to slurm, this task has ended (successfully or not)
1384 # -- but our srun child hasn't exited. First we must wait (30
1385 # seconds) in case this is just a race between communication
1386 # channels. Then, if our srun child process still hasn't
1387 # terminated, we'll conclude some slurm communication
1388 # error/delay has caused the task to die without notifying srun,
1389 # and we'll kill srun ourselves.
1390 $jobstep->{killtime} = time + 30;
1391 Log($jobstep->{jobstep}, "notice: task is not in slurm queue but srun process $pid has not exited");
1397 sub release_allocation
1401 Log (undef, "release job allocation");
1402 system "scancel $ENV{SLURM_JOB_ID}";
1410 foreach my $job (keys %reader)
1413 while (0 < sysread ($reader{$job}, $buf, 8192))
1415 print STDERR $buf if $ENV{CRUNCH_DEBUG};
1416 $jobstep[$job]->{stderr_at} = time;
1417 $jobstep[$job]->{stderr} .= $buf;
1418 preprocess_stderr ($job);
1419 if (length ($jobstep[$job]->{stderr}) > 16384)
1421 substr ($jobstep[$job]->{stderr}, 0, 8192) = "";
1430 sub preprocess_stderr
1434 while ($jobstep[$job]->{stderr} =~ /^(.*?)\n/) {
1436 substr $jobstep[$job]->{stderr}, 0, 1+length($line), "";
1437 Log ($job, "stderr $line");
1438 if ($line =~ /srun: error: (SLURM job $ENV{SLURM_JOB_ID} has expired|Unable to confirm allocation for job $ENV{SLURM_JOB_ID})/) {
1440 $main::please_freeze = 1;
1442 elsif ($line =~ /srun: error: Node failure on/) {
1443 my $job_slot_index = $jobstep[$job]->{slotindex};
1444 $slot[$job_slot_index]->{node}->{fail_count}++;
1445 $jobstep[$job]->{tempfail} = 1;
1446 ban_node_by_slot($job_slot_index);
1448 elsif ($line =~ /srun: error: (Unable to create job step|.*: Communication connection failure)/) {
1449 $jobstep[$job]->{tempfail} = 1;
1450 ban_node_by_slot($jobstep[$job]->{slotindex});
1452 elsif ($line =~ /arvados\.errors\.Keep/) {
1453 $jobstep[$job]->{tempfail} = 1;
1462 my $task_success = shift;
1463 preprocess_stderr ($job);
1466 Log ($job, "stderr $_");
1467 } split ("\n", $jobstep[$job]->{stderr});
1474 if (!open($keep, "-|", "arv-get", "--retries", retry_count(), $hash)) {
1475 Log(undef, "fetch_block run error from arv-get $hash: $!");
1478 my $output_block = "";
1481 my $bytes = sysread($keep, $buf, 1024 * 1024);
1482 if (!defined $bytes) {
1483 Log(undef, "fetch_block read error from arv-get: $!");
1484 $output_block = undef;
1486 } elsif ($bytes == 0) {
1487 # sysread returns 0 at the end of the pipe.
1490 # some bytes were read into buf.
1491 $output_block .= $buf;
1496 Log(undef, "fetch_block arv-get exited " . exit_status_s($?));
1497 $output_block = undef;
1499 return $output_block;
1502 # Create a collection by concatenating the output of all tasks (each
1503 # task's output is either a manifest fragment, a locator for a
1504 # manifest fragment stored in Keep, or nothing at all). Return the
1505 # portable_data_hash of the new collection.
1506 sub create_output_collection
1508 Log (undef, "collate");
1510 my ($child_out, $child_in);
1511 my $pid = open2($child_out, $child_in, 'python', '-c', q{
1514 print (arvados.api("v1").collections().
1515 create(body={"manifest_text": sys.stdin.read()}).
1516 execute(num_retries=int(sys.argv[1]))["portable_data_hash"])
1520 my $manifest_size = 0;
1524 my $output = $_->{'arvados_task'}->{output};
1525 next if (!defined($output));
1527 if ($output =~ /^[0-9a-f]{32}(\+\S+)*$/) {
1528 $next_write = fetch_block($output);
1530 $next_write = $output;
1532 if (defined($next_write)) {
1533 if (!defined(syswrite($child_in, $next_write))) {
1534 # There's been an error writing. Stop the loop.
1535 # We'll log details about the exit code later.
1538 $manifest_size += length($next_write);
1541 my $uuid = $_->{'arvados_task'}->{'uuid'};
1542 Log (undef, "Error retrieving '$output' output by task $task_idx ($uuid)");
1547 Log(undef, "collated output manifest text to send to API server is $manifest_size bytes with access tokens");
1550 my $s = IO::Select->new($child_out);
1551 if ($s->can_read(120)) {
1552 sysread($child_out, $joboutput, 1024 * 1024);
1555 Log(undef, "output collection creation exited " . exit_status_s($?));
1561 Log (undef, "timed out while creating output collection");
1562 foreach my $signal (2, 2, 2, 15, 15, 9) {
1563 kill($signal, $pid);
1564 last if waitpid($pid, WNOHANG) == -1;
1573 # Calls create_output_collection, logs the result, and returns it.
1574 # If that was successful, save that as the output in the job record.
1575 sub save_output_collection {
1576 my $collated_output = create_output_collection();
1578 if (!$collated_output) {
1579 Log(undef, "Failed to write output collection");
1582 Log(undef, "job output $collated_output");
1583 $Job->update_attributes('output' => $collated_output);
1585 return $collated_output;
1592 my $sig = 2; # SIGINT first
1593 if (exists $proc{$_}->{"sent_$sig"} &&
1594 time - $proc{$_}->{"sent_$sig"} > 4)
1596 $sig = 15; # SIGTERM if SIGINT doesn't work
1598 if (exists $proc{$_}->{"sent_$sig"} &&
1599 time - $proc{$_}->{"sent_$sig"} > 4)
1601 $sig = 9; # SIGKILL if SIGTERM doesn't work
1603 if (!exists $proc{$_}->{"sent_$sig"})
1605 Log ($proc{$_}->{jobstep}, "sending 2x signal $sig to pid $_");
1607 select (undef, undef, undef, 0.1);
1610 kill $sig, $_; # srun wants two SIGINT to really interrupt
1612 $proc{$_}->{"sent_$sig"} = time;
1613 $proc{$_}->{"killedafter"} = time - $proc{$_}->{"time"};
1623 vec($bits,fileno($_),1) = 1;
1629 # Send log output to Keep via arv-put.
1631 # $log_pipe_in and $log_pipe_out are the input and output filehandles to the arv-put pipe.
1632 # $log_pipe_out_buf is a string containing all output read from arv-put so far.
1633 # $log_pipe_out_select is an IO::Select object around $log_pipe_out.
1634 # $log_pipe_pid is the pid of the arv-put subprocess.
1636 # The only functions that should access these variables directly are:
1638 # log_writer_start($logfilename)
1639 # Starts an arv-put pipe, reading data on stdin and writing it to
1640 # a $logfilename file in an output collection.
1642 # log_writer_read_output([$timeout])
1643 # Read output from $log_pipe_out and append it to $log_pipe_out_buf.
1644 # Passes $timeout to the select() call, with a default of 0.01.
1645 # Returns the result of the last read() call on $log_pipe_out, or
1646 # -1 if read() wasn't called because select() timed out.
1647 # Only other log_writer_* functions should need to call this.
1649 # log_writer_send($txt)
1650 # Writes $txt to the output log collection.
1652 # log_writer_finish()
1653 # Closes the arv-put pipe and returns the output that it produces.
1655 # log_writer_is_active()
1656 # Returns a true value if there is currently a live arv-put
1657 # process, false otherwise.
1659 my ($log_pipe_in, $log_pipe_out, $log_pipe_out_buf, $log_pipe_out_select,
1662 sub log_writer_start($)
1664 my $logfilename = shift;
1665 $log_pipe_pid = open2($log_pipe_out, $log_pipe_in,
1669 '--filename', $logfilename,
1671 $log_pipe_out_buf = "";
1672 $log_pipe_out_select = IO::Select->new($log_pipe_out);
1675 sub log_writer_read_output {
1676 my $timeout = shift || 0.01;
1678 while ($read && $log_pipe_out_select->can_read($timeout)) {
1679 $read = read($log_pipe_out, $log_pipe_out_buf, 65536,
1680 length($log_pipe_out_buf));
1682 if (!defined($read)) {
1683 Log(undef, "error reading log manifest from arv-put: $!");
1688 sub log_writer_send($)
1691 print $log_pipe_in $txt;
1692 log_writer_read_output();
1695 sub log_writer_finish()
1697 return unless $log_pipe_pid;
1699 close($log_pipe_in);
1701 my $logger_failed = 0;
1702 my $read_result = log_writer_read_output(120);
1703 if ($read_result == -1) {
1704 $logger_failed = -1;
1705 Log (undef, "timed out reading from 'arv-put'");
1706 } elsif ($read_result != 0) {
1707 $logger_failed = -2;
1708 Log(undef, "failed to read arv-put log manifest to EOF");
1711 waitpid($log_pipe_pid, 0);
1713 $logger_failed ||= $?;
1714 Log(undef, "log_writer_finish: arv-put exited " . exit_status_s($?))
1717 close($log_pipe_out);
1718 my $arv_put_output = $logger_failed ? undef : $log_pipe_out_buf;
1719 $log_pipe_pid = $log_pipe_in = $log_pipe_out = $log_pipe_out_buf =
1720 $log_pipe_out_select = undef;
1722 return $arv_put_output;
1725 sub log_writer_is_active() {
1726 return $log_pipe_pid;
1729 sub Log # ($jobstep_id, $logmessage)
1731 if ($_[1] =~ /\n/) {
1732 for my $line (split (/\n/, $_[1])) {
1737 my $fh = select STDERR; $|=1; select $fh;
1738 my $message = sprintf ("%s %d %s %s", $job_id, $$, @_);
1739 $message =~ s{([^ -\176])}{"\\" . sprintf ("%03o", ord($1))}ge;
1742 if (log_writer_is_active() || -t STDERR) {
1743 my @gmtime = gmtime;
1744 $datetime = sprintf ("%04d-%02d-%02d_%02d:%02d:%02d",
1745 $gmtime[5]+1900, $gmtime[4]+1, @gmtime[3,2,1,0]);
1747 print STDERR ((-t STDERR) ? ($datetime." ".$message) : $message);
1749 if (log_writer_is_active()) {
1750 log_writer_send($datetime . " " . $message);
1757 my ($package, $file, $line) = caller;
1758 my $message = "@_ at $file line $line\n";
1759 Log (undef, $message);
1760 freeze() if @jobstep_todo;
1761 create_output_collection() if @jobstep_todo;
1771 if ($Job->{'state'} eq 'Cancelled') {
1772 $Job->update_attributes('finished_at' => scalar gmtime);
1774 $Job->update_attributes('state' => 'Failed');
1781 my $justcheckpoint = shift; # false if this will be the last meta saved
1782 return if $justcheckpoint; # checkpointing is not relevant post-Warehouse.pm
1783 return unless log_writer_is_active();
1784 my $log_manifest = log_writer_finish();
1785 return unless defined($log_manifest);
1788 my $prev_log_coll = api_call("collections/get", uuid => $Job->{log});
1789 $log_manifest = $prev_log_coll->{manifest_text} . $log_manifest;
1792 my $log_coll = api_call(
1793 "collections/create", ensure_unique_name => 1, collection => {
1794 manifest_text => $log_manifest,
1795 owner_uuid => $Job->{owner_uuid},
1796 name => sprintf("Log from %s job %s", $Job->{script}, $Job->{uuid}),
1798 Log(undef, "log collection is " . $log_coll->{portable_data_hash});
1799 $Job->update_attributes('log' => $log_coll->{portable_data_hash});
1803 sub freeze_if_want_freeze
1805 if ($main::please_freeze)
1807 release_allocation();
1810 # kill some srun procs before freeze+stop
1811 map { $proc{$_} = {} } @_;
1814 killem (keys %proc);
1815 select (undef, undef, undef, 0.1);
1817 while (($died = waitpid (-1, WNOHANG)) > 0)
1819 delete $proc{$died};
1824 create_output_collection();
1834 Log (undef, "Freeze not implemented");
1841 croak ("Thaw not implemented");
1857 $s =~ s{\\(.)}{$1 eq "n" ? "\n" : $1}ge;
1864 my $srunargs = shift;
1865 my $execargs = shift;
1866 my $opts = shift || {};
1868 my $args = $have_slurm ? [@$srunargs, @$execargs] : $execargs;
1870 $Data::Dumper::Terse = 1;
1871 $Data::Dumper::Indent = 0;
1872 my $show_cmd = Dumper($args);
1873 $show_cmd =~ s/(TOKEN\\*=)[^\s\']+/${1}[...]/g;
1874 $show_cmd =~ s/\n/ /g;
1875 if ($opts->{fork}) {
1876 Log(undef, "starting: $show_cmd");
1878 # This is a child process: parent is in charge of reading our
1879 # stderr and copying it to Log() if needed.
1880 warn "starting: $show_cmd\n";
1883 if (defined $stdin) {
1884 my $child = open STDIN, "-|";
1885 defined $child or die "no fork: $!";
1887 print $stdin or die $!;
1888 close STDOUT or die $!;
1893 return system (@$args) if $opts->{fork};
1896 warn "ENV size is ".length(join(" ",%ENV));
1897 die "exec failed: $!: @$args";
1901 sub ban_node_by_slot {
1902 # Don't start any new jobsteps on this node for 60 seconds
1904 $slot[$slotid]->{node}->{hold_until} = 60 + scalar time;
1905 $slot[$slotid]->{node}->{hold_count}++;
1906 Log (undef, "backing off node " . $slot[$slotid]->{node}->{name} . " for 60 seconds");
1911 my ($lockfile, $error_message) = @_;
1912 open L, ">", $lockfile or croak("$lockfile: $!");
1913 if (!flock L, LOCK_EX|LOCK_NB) {
1914 croak("Can't lock $lockfile: $error_message\n");
1918 sub find_docker_image {
1919 # Given a Keep locator, check to see if it contains a Docker image.
1920 # If so, return its stream name and Docker hash.
1921 # If not, return undef for both values.
1922 my $locator = shift;
1923 my ($streamname, $filename);
1924 my $image = api_call("collections/get", uuid => $locator);
1926 foreach my $line (split(/\n/, $image->{manifest_text})) {
1927 my @tokens = split(/\s+/, $line);
1929 $streamname = shift(@tokens);
1930 foreach my $filedata (grep(/^\d+:\d+:/, @tokens)) {
1931 if (defined($filename)) {
1932 return (undef, undef); # More than one file in the Collection.
1934 $filename = (split(/:/, $filedata, 3))[2];
1939 if (defined($filename) and ($filename =~ /^([0-9A-Fa-f]{64})\.tar$/)) {
1940 return ($streamname, $1);
1942 return (undef, undef);
1947 # Calculate the number of times an operation should be retried,
1948 # assuming exponential backoff, and that we're willing to retry as
1949 # long as tasks have been running. Enforce a minimum of 3 retries.
1950 my ($starttime, $endtime, $timediff, $retries);
1952 $starttime = $jobstep[0]->{starttime};
1953 $endtime = $jobstep[-1]->{finishtime};
1955 if (!defined($starttime)) {
1957 } elsif (!defined($endtime)) {
1958 $timediff = time - $starttime;
1960 $timediff = ($endtime - $starttime) - (time - $endtime);
1962 if ($timediff > 0) {
1963 $retries = int(log($timediff) / log(2));
1965 $retries = 1; # Use the minimum.
1967 return ($retries > 3) ? $retries : 3;
1971 # Pass in two function references.
1972 # This method will be called with the remaining arguments.
1973 # If it dies, retry it with exponential backoff until it succeeds,
1974 # or until the current retry_count is exhausted. After each failure
1975 # that can be retried, the second function will be called with
1976 # the current try count (0-based), next try time, and error message.
1977 my $operation = shift;
1978 my $retry_callback = shift;
1979 my $retries = retry_count();
1980 foreach my $try_count (0..$retries) {
1981 my $next_try = time + (2 ** $try_count);
1982 my $result = eval { $operation->(@_); };
1985 } elsif ($try_count < $retries) {
1986 $retry_callback->($try_count, $next_try, $@);
1987 my $sleep_time = $next_try - time;
1988 sleep($sleep_time) if ($sleep_time > 0);
1991 # Ensure the error message ends in a newline, so Perl doesn't add
1992 # retry_op's line number to it.
1998 # Pass in a /-separated API method name, and arguments for it.
1999 # This function will call that method, retrying as needed until
2000 # the current retry_count is exhausted, with a log on the first failure.
2001 my $method_name = shift;
2002 my $log_api_retry = sub {
2003 my ($try_count, $next_try_at, $errmsg) = @_;
2004 $errmsg =~ s/\s*\bat \Q$0\E line \d+\.?\s*//;
2005 $errmsg =~ s/\s/ /g;
2006 $errmsg =~ s/\s+$//;
2008 if ($next_try_at < time) {
2009 $retry_msg = "Retrying.";
2011 my $next_try_fmt = strftime "%Y-%m-%dT%H:%M:%SZ", gmtime($next_try_at);
2012 $retry_msg = "Retrying at $next_try_fmt.";
2014 Log(undef, "API method $method_name failed: $errmsg. $retry_msg");
2017 foreach my $key (split(/\//, $method_name)) {
2018 $method = $method->{$key};
2020 return retry_op(sub { $method->execute(@_); }, $log_api_retry, @_);
2024 # Given a $?, return a human-readable exit code string like "0" or
2025 # "1" or "0 with signal 1" or "1 with signal 11".
2026 my $exitcode = shift;
2027 my $s = $exitcode >> 8;
2028 if ($exitcode & 0x7f) {
2029 $s .= " with signal " . ($exitcode & 0x7f);
2031 if ($exitcode & 0x80) {
2032 $s .= " with core dump";
2037 sub handle_readall {
2038 # Pass in a glob reference to a file handle.
2039 # Read all its contents and return them as a string.
2040 my $fh_glob_ref = shift;
2042 return <$fh_glob_ref>;
2045 sub tar_filename_n {
2047 return sprintf("%s/git.%s.%d.tar", $ENV{CRUNCH_TMP}, $job_id, $n);
2050 sub add_git_archive {
2051 # Pass in a git archive command as a string or list, a la system().
2052 # This method will save its output to be included in the archive sent to the
2056 if (!open(GIT_ARCHIVE, ">", tar_filename_n($git_tar_count))) {
2057 croak("Failed to save git archive: $!");
2059 my $git_pid = open2(">&GIT_ARCHIVE", $git_input, @_);
2061 waitpid($git_pid, 0);
2064 croak("Failed to save git archive: git exited " . exit_status_s($?));
2068 sub combined_git_archive {
2069 # Combine all saved tar archives into a single archive, then return its
2070 # contents in a string. Return undef if no archives have been saved.
2071 if ($git_tar_count < 1) {
2074 my $base_tar_name = tar_filename_n(1);
2075 foreach my $tar_to_append (map { tar_filename_n($_); } (2..$git_tar_count)) {
2076 my $tar_exit = system("tar", "-Af", $base_tar_name, $tar_to_append);
2077 if ($tar_exit != 0) {
2078 croak("Error preparing build archive: tar -A exited " .
2079 exit_status_s($tar_exit));
2082 if (!open(GIT_TAR, "<", $base_tar_name)) {
2083 croak("Could not open build archive: $!");
2085 my $tar_contents = handle_readall(\*GIT_TAR);
2087 return $tar_contents;
2090 sub set_nonblocking {
2092 my $flags = fcntl ($fh, F_GETFL, 0) or croak ($!);
2093 fcntl ($fh, F_SETFL, $flags | O_NONBLOCK) or croak ($!);
2099 # This is crunch-job's internal dispatch script. crunch-job running on the API
2100 # server invokes this script on individual compute nodes, or localhost if we're
2101 # running a job locally. It gets called in two modes:
2103 # * No arguments: Installation mode. Read a tar archive from the DATA
2104 # file handle; it includes the Crunch script's source code, and
2105 # maybe SDKs as well. Those should be installed in the proper
2106 # locations. This runs outside of any Docker container, so don't try to
2107 # introspect Crunch's runtime environment.
2109 # * With arguments: Crunch script run mode. This script should set up the
2110 # environment, then run the command specified in the arguments. This runs
2111 # inside any Docker container.
2114 use File::Path qw( make_path remove_tree );
2115 use POSIX qw(getcwd);
2117 use constant TASK_TEMPFAIL => 111;
2119 # Map SDK subdirectories to the path environments they belong to.
2120 my %SDK_ENVVARS = ("perl/lib" => "PERLLIB", "ruby/lib" => "RUBYLIB");
2122 my $destdir = $ENV{"CRUNCH_SRC"};
2123 my $archive_hash = $ENV{"CRUNCH_GIT_ARCHIVE_HASH"};
2124 my $repo = $ENV{"CRUNCH_SRC_URL"};
2125 my $install_dir = $ENV{"CRUNCH_INSTALL"} || (getcwd() . "/opt");
2126 my $job_work = $ENV{"JOB_WORK"};
2127 my $task_work = $ENV{"TASK_WORK"};
2129 open(STDOUT_ORIG, ">&", STDOUT);
2130 open(STDERR_ORIG, ">&", STDERR);
2132 for my $dir ($destdir, $job_work, $task_work) {
2135 -e $dir or die "Failed to create temporary directory ($dir): $!";
2140 remove_tree($task_work, {keep_root => 1});
2143 ### Crunch script run mode
2145 # We want to do routine logging during task 0 only. This gives the user
2146 # the information they need, but avoids repeating the information for every
2149 if ($ENV{TASK_SEQUENCE} eq "0") {
2152 printf STDERR_ORIG "[Crunch] $msg\n", @_;
2158 my $python_src = "$install_dir/python";
2159 my $venv_dir = "$job_work/.arvados.venv";
2160 my $venv_built = -e "$venv_dir/bin/activate";
2161 if ((!$venv_built) and (-d $python_src) and can_run("virtualenv")) {
2162 shell_or_die(undef, "virtualenv", "--quiet", "--system-site-packages",
2163 "--python=python2.7", $venv_dir);
2164 shell_or_die(TASK_TEMPFAIL, "$venv_dir/bin/pip", "--quiet", "install", "-I", $python_src);
2166 $Log->("Built Python SDK virtualenv");
2169 my $pip_bin = "pip";
2171 $Log->("Running in Python SDK virtualenv");
2172 $pip_bin = "$venv_dir/bin/pip";
2173 my $orig_argv = join(" ", map { quotemeta($_); } @ARGV);
2174 @ARGV = ("/bin/sh", "-ec",
2175 ". \Q$venv_dir/bin/activate\E; exec $orig_argv");
2176 } elsif (-d $python_src) {
2177 $Log->("Warning: virtualenv not found inside Docker container default " .
2178 "\$PATH. Can't install Python SDK.");
2181 my $pkgs = `(\Q$pip_bin\E freeze 2>/dev/null | grep arvados) || dpkg-query --show '*arvados*'`;
2183 $Log->("Using Arvados SDK:");
2184 foreach my $line (split /\n/, $pkgs) {
2188 $Log->("Arvados SDK packages not found");
2191 while (my ($sdk_dir, $sdk_envkey) = each(%SDK_ENVVARS)) {
2192 my $sdk_path = "$install_dir/$sdk_dir";
2194 if ($ENV{$sdk_envkey}) {
2195 $ENV{$sdk_envkey} = "$sdk_path:" . $ENV{$sdk_envkey};
2197 $ENV{$sdk_envkey} = $sdk_path;
2199 $Log->("Arvados SDK added to %s", $sdk_envkey);
2204 die "Cannot exec `@ARGV`: $!";
2207 ### Installation mode
2208 open L, ">", "$destdir.lock" or die "$destdir.lock: $!";
2210 if (readlink ("$destdir.archive_hash") eq $archive_hash && -d $destdir) {
2211 # This exact git archive (source + arvados sdk) is already installed
2212 # here, so there's no need to reinstall it.
2214 # We must consume our DATA section, though: otherwise the process
2215 # feeding it to us will get SIGPIPE.
2217 while (read(DATA, $buf, 65536)) { }
2222 unlink "$destdir.archive_hash";
2226 # Ignore SIGPIPE: we check retval of close() instead. See perlipc(1).
2227 local $SIG{PIPE} = "IGNORE";
2228 warn "Extracting archive: $archive_hash\n";
2229 # --ignore-zeros is necessary sometimes: depending on how much NUL
2230 # padding tar -A put on our combined archive (which in turn depends
2231 # on the length of the component archives) tar without
2232 # --ignore-zeros will exit before consuming stdin and cause close()
2233 # to fail on the resulting SIGPIPE.
2234 if (!open(TARX, "|-", "tar", "--ignore-zeros", "-xC", $destdir)) {
2235 die "Error launching 'tar -xC $destdir': $!";
2237 # If we send too much data to tar in one write (> 4-5 MiB), it stops, and we
2238 # get SIGPIPE. We must feed it data incrementally.
2240 while (read(DATA, $tar_input, 65536)) {
2241 print TARX $tar_input;
2244 die "'tar -xC $destdir' exited $?: $!";
2250 my $sdk_root = "$destdir/.arvados.sdk/sdk";
2252 foreach my $sdk_lang (("python",
2253 map { (split /\//, $_, 2)[0]; } keys(%SDK_ENVVARS))) {
2254 if (-d "$sdk_root/$sdk_lang") {
2255 if (!rename("$sdk_root/$sdk_lang", "$install_dir/$sdk_lang")) {
2256 die "Failed to install $sdk_lang SDK: $!";
2262 my $python_dir = "$install_dir/python";
2263 if ((-d $python_dir) and can_run("python2.7")) {
2264 open(my $egg_info_pipe, "-|",
2265 "python2.7 \Q$python_dir/setup.py\E egg_info 2>&1 >/dev/null");
2266 my @egg_info_errors = <$egg_info_pipe>;
2267 close($egg_info_pipe);
2270 if (@egg_info_errors and (($egg_info_errors[-1] =~ /\bgit\b/) or ($egg_info_errors[-1] =~ /\[Errno 2\]/))) {
2271 # egg_info apparently failed because it couldn't ask git for a build tag.
2272 # Specify no build tag.
2273 open(my $pysdk_cfg, ">>", "$python_dir/setup.cfg");
2274 print $pysdk_cfg "\n[egg_info]\ntag_build =\n";
2277 my $egg_info_exit = $? >> 8;
2278 foreach my $errline (@egg_info_errors) {
2281 warn "python setup.py egg_info failed: exit $egg_info_exit";
2282 exit ($egg_info_exit || 1);
2287 # Hide messages from the install script (unless it fails: shell_or_die
2288 # will show $destdir.log in that case).
2289 open(STDOUT, ">>", "$destdir.log");
2290 open(STDERR, ">&", STDOUT);
2292 if (-e "$destdir/crunch_scripts/install") {
2293 shell_or_die (undef, "$destdir/crunch_scripts/install", $install_dir);
2294 } elsif (!-e "./install.sh" && -e "./tests/autotests.sh") {
2296 shell_or_die (undef, "./tests/autotests.sh", $install_dir);
2297 } elsif (-e "./install.sh") {
2298 shell_or_die (undef, "./install.sh", $install_dir);
2301 if ($archive_hash) {
2302 unlink "$destdir.archive_hash.new";
2303 symlink ($archive_hash, "$destdir.archive_hash.new") or die "$destdir.archive_hash.new: $!";
2304 rename ("$destdir.archive_hash.new", "$destdir.archive_hash") or die "$destdir.archive_hash: $!";
2310 my $command_name = shift;
2311 open(my $which, "-|", "which", $command_name);
2312 while (<$which>) { }
2319 my $exitcode = shift;
2321 if ($ENV{"DEBUG"}) {
2322 print STDERR "@_\n";
2324 if (system (@_) != 0) {
2327 my $exitstatus = sprintf("exit %d signal %d", $code >> 8, $code & 0x7f);
2328 open STDERR, ">&STDERR_ORIG";
2329 system ("cat $destdir.log >&2");
2330 warn "@_ failed ($err): $exitstatus";
2331 if (defined($exitcode)) {
2335 exit (($code >> 8) || 1);