336 lines
9.1 KiB
Perl
336 lines
9.1 KiB
Perl
package App::Netdisco::JobQueue::PostgreSQL;
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use Dancer qw/:moose :syntax :script/;
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use Dancer::Plugin::DBIC 'schema';
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use App::Netdisco::Util::Device
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qw/is_discoverable is_macsuckable is_arpnipable/;
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use App::Netdisco::Backend::Job;
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use Module::Load ();
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use Try::Tiny;
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use base 'Exporter';
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our @EXPORT = ();
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our @EXPORT_OK = qw/
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jq_warm_thrusters
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jq_getsome
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jq_locked
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jq_queued
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jq_lock
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jq_defer
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jq_complete
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jq_log
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jq_userlog
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jq_insert
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jq_delete
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/;
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our %EXPORT_TAGS = ( all => \@EXPORT_OK );
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# given a device, tests if any of the primary acls applies
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# returns a list of job actions to be denied/skipped on this host.
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sub _get_denied_actions {
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my $device = shift;
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my @badactions = ();
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return @badactions unless $device;
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push @badactions, ('discover', @{ setting('job_prio')->{high} })
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if not is_discoverable($device);
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push @badactions, (qw/macsuck nbtstat/)
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if not is_macsuckable($device);
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push @badactions, 'arpnip'
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if not is_arpnipable($device);
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return @badactions;
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}
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sub jq_warm_thrusters {
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my @devices = schema('netdisco')->resultset('Device')->all;
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my $rs = schema('netdisco')->resultset('DeviceSkip');
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my %actionset = ();
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foreach my $d (@devices) {
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my @badactions = _get_denied_actions($d);
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$actionset{$d->ip} = \@badactions if scalar @badactions;
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}
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schema('netdisco')->txn_do(sub {
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$rs->search({
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backend => setting('workers')->{'BACKEND'},
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}, { for => 'update' }, )->update({ actionset => [] });
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my $deferrals = setting('workers')->{'max_deferrals'} - 1;
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$rs->search({
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backend => setting('workers')->{'BACKEND'},
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deferrals => { '>' => $deferrals },
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}, { for => 'update' }, )->update({ deferrals => $deferrals });
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$rs->search({
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backend => setting('workers')->{'BACKEND'},
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actionset => { -value => [] },
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deferrals => 0,
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})->delete;
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$rs->update_or_create({
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backend => setting('workers')->{'BACKEND'},
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device => $_,
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actionset => $actionset{$_},
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}, { key => 'primary' }) for keys %actionset;
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});
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}
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sub jq_getsome {
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my $num_slots = shift;
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return () unless $num_slots and $num_slots > 0;
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my $jobs = schema('netdisco')->resultset('Admin');
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my @returned = ();
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my $tasty = schema('netdisco')->resultset('Virtual::TastyJobs')
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->search(undef,{ bind => [
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setting('workers')->{'BACKEND'}, setting('job_prio')->{'high'},
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setting('workers')->{'BACKEND'}, setting('workers')->{'max_deferrals'},
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setting('workers')->{'retry_after'}, $num_slots,
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]});
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while (my $job = $tasty->next) {
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if ($job->device) {
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# need to handle device discovered since backend daemon started
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# and the skiplist was primed. these should be checked against
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# the various acls and have device_skip entry added if needed,
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# and return false if it should have been skipped.
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my @badactions = _get_denied_actions($job->device);
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if (scalar @badactions) {
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schema('netdisco')->resultset('DeviceSkip')->find_or_create({
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backend => setting('workers')->{'BACKEND'}, device => $job->device,
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},{ key => 'device_skip_pkey' })->add_to_actionset(@badactions);
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# will now not be selected in a future _getsome()
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next if scalar grep {$_ eq $job->action} @badactions;
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}
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}
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# remove any duplicate jobs, incuding possibly this job if there
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# is already an equivalent job running
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# note that the self-removal of a job has an unhelpful log: it is
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# reported as a duplicate of itself! however what's happening is that
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# netdisco has seen another running job with same params (but the query
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# cannot see that ID to use it in the message).
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my %job_properties = (
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action => $job->action,
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port => $job->port,
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subaction => $job->subaction,
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-or => [
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{ device => $job->device },
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($job->device_key ? ({ device_key => $job->device_key }) : ()),
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],
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);
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my $gone = $jobs->search({
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status => 'queued',
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-and => [
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%job_properties,
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-or => [{
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job => { '!=' => $job->id },
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},{
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job => $job->id,
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-exists => $jobs->search({
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status => { -like => 'queued-%' },
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started => \[q/> (now() - ?::interval)/, setting('jobs_stale_after')],
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%job_properties,
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})->as_query,
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}],
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],
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}, {for => 'update'})
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->update({ status => 'error', log => (sprintf 'duplicate of %s', $job->id) });
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debug sprintf 'getsome: cancelled %s duplicate(s) of job %s', ($gone || 0), $job->id;
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push @returned, App::Netdisco::Backend::Job->new({ $job->get_columns });
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}
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return @returned;
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}
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sub jq_locked {
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my @returned = ();
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my $rs = schema('netdisco')->resultset('Admin')->search({
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status => ('queued-'. setting('workers')->{'BACKEND'}),
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started => \[q/> (now() - ?::interval)/, setting('jobs_stale_after')],
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});
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while (my $job = $rs->next) {
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push @returned, App::Netdisco::Backend::Job->new({ $job->get_columns });
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}
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return @returned;
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}
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sub jq_queued {
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my $job_type = shift;
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return schema('netdisco')->resultset('Admin')->search({
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device => { '!=' => undef},
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action => $job_type,
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status => { -like => 'queued%' },
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})->get_column('device')->all;
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}
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sub jq_lock {
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my $job = shift;
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my $happy = false;
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# lock db row and update to show job has been picked
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try {
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my $updated = schema('netdisco')->resultset('Admin')
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->search({ job => $job->id, status => 'queued' }, { for => 'update' })
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->update({
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status => ('queued-'. setting('workers')->{'BACKEND'}),
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started => \"now()",
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});
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$happy = true if $updated > 0;
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}
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catch {
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error $_;
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};
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return $happy;
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}
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sub jq_defer {
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my $job = shift;
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my $happy = false;
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# note this taints all actions on the device. for example if both
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# macsuck and arpnip are allowed, but macsuck fails 10 times, then
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# arpnip (and every other action) will be prevented on the device.
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# seeing as defer is only triggered by an SNMP connect failure, this
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# behaviour seems reasonable, to me (or desirable, perhaps).
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try {
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schema('netdisco')->txn_do(sub {
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if ($job->device) {
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schema('netdisco')->resultset('DeviceSkip')->find_or_create({
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backend => setting('workers')->{'BACKEND'}, device => $job->device,
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},{ key => 'device_skip_pkey' })->increment_deferrals;
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}
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# lock db row and update to show job is available
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schema('netdisco')->resultset('Admin')
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->find($job->id, {for => 'update'})
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->update({ status => 'queued', started => undef });
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});
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$happy = true;
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}
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catch {
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error $_;
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};
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return $happy;
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}
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sub jq_complete {
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my $job = shift;
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my $happy = false;
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# lock db row and update to show job is done/error
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# now that SNMP connect failures are deferrals and not errors, any complete
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# status, whether success or failure, indicates an SNMP connect. reset the
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# connection failures counter to forget about occasional connect glitches.
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try {
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schema('netdisco')->txn_do(sub {
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if ($job->device) {
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schema('netdisco')->resultset('DeviceSkip')->find_or_create({
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backend => setting('workers')->{'BACKEND'}, device => $job->device,
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},{ key => 'device_skip_pkey' })->update({ deferrals => 0 });
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}
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schema('netdisco')->resultset('Admin')
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->find($job->id, {for => 'update'})->update({
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status => $job->status,
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log => $job->log,
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started => $job->started,
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finished => $job->finished,
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});
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});
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$happy = true;
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}
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catch {
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# use DDP; p $job;
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error $_;
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};
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return $happy;
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}
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sub jq_log {
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return schema('netdisco')->resultset('Admin')->search({
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'me.log' => { '-not_like' => 'duplicate of %' },
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}, {
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prefetch => 'target',
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order_by => { -desc => [qw/entered device action/] },
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rows => (setting('jobs_qdepth') || 50),
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})->with_times->hri->all;
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}
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sub jq_userlog {
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my $user = shift;
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return schema('netdisco')->resultset('Admin')->search({
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username => $user,
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log => { '-not_like' => 'duplicate of %' },
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finished => { '>' => \"(now() - interval '5 seconds')" },
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})->with_times->all;
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}
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sub jq_insert {
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my $jobs = shift;
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$jobs = [$jobs] if ref [] ne ref $jobs;
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my $happy = false;
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try {
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schema('netdisco')->txn_do(sub {
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schema('netdisco')->resultset('Admin')->populate([
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map {{
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device => $_->{device},
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device_key => $_->{device_key},
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port => $_->{port},
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action => $_->{action},
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subaction => ($_->{extra} || $_->{subaction}),
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username => $_->{username},
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userip => $_->{userip},
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status => 'queued',
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}} @$jobs
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]);
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});
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$happy = true;
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}
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catch {
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error $_;
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};
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return $happy;
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}
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sub jq_delete {
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my $id = shift;
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if ($id) {
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schema('netdisco')->txn_do(sub {
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schema('netdisco')->resultset('Admin')->find($id)->delete();
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});
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}
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else {
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schema('netdisco')->txn_do(sub {
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schema('netdisco')->resultset('Admin')->delete();
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});
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}
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}
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true;
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