device_ignore table to track devices to skip in polling

lib/App/Netdisco/DB.pm

@@ -11,7 +11,7 @@ __PACKAGE__->load_namespaces(
 );
 
 our # try to hide from kwalitee
-  $VERSION = 41; # schema version used for upgrades, keep as integer
+  $VERSION = 42; # schema version used for upgrades, keep as integer
 
 use Path::Class;
 use File::ShareDir 'dist_dir';

lib/App/Netdisco/DB/Result/Admin.pm

@@ -114,4 +114,17 @@ between the date stamp and time stamp. That is:
 
 sub finished_stamp  { return (shift)->get_column('finished_stamp')  }
 
+=head1 RELATIONSHIPS
+
+=head2 ignored
+
+Retuns the set of C<device_ignore> entries which may apply to this job. They
+match the device IP and job action, and may refer to one or more backends.
+
+=cut
+
+__PACKAGE__->has_many( ignored => 'App::Netdisco::DB::Result::DeviceIgnore',
+   { 'foreign.device' => 'self.device', 'foreign.action' => 'self.action' },
+);
+
 1;

lib/App/Netdisco/DB/Result/DeviceIgnore.pm

@@ -0,0 +1,23 @@
+use utf8;
+package App::Netdisco::DB::Result::DeviceIgnore;
+
+use strict;
+use warnings;
+
+use base 'DBIx::Class::Core';
+__PACKAGE__->table("device_ignore");
+__PACKAGE__->add_columns(
+  "backend",
+  { data_type => "text", is_nullable => 0 },
+  "device",
+  { data_type => "inet", is_nullable => 0 },
+  "action",
+  { data_type => "text", is_nullable => 0 },
+  "failures",
+  { data_type => "integer", is_nullable => 1, default_value => '0' },
+  "ignore",
+  { data_type => "boolean", is_nullable => 1, default_value => \'false' },
+);
+__PACKAGE__->set_primary_key("backend", "device", "action");
+
+1;

lib/App/Netdisco/DB/ResultSet.pm

@@ -5,8 +5,11 @@ use warnings;
 
 use base 'DBIx::Class::ResultSet';
 
-__PACKAGE__->load_components(
-    qw{Helper::ResultSet::SetOperations Helper::ResultSet::Shortcut});
+__PACKAGE__->load_components(qw/
+  Helper::ResultSet::SetOperations
+  Helper::ResultSet::Shortcut
+  Helper::ResultSet::CorrelateRelationship
+/);
 
 =head1 ADDITIONAL METHODS
 

lib/App/Netdisco/JobQueue/PostgreSQL.pm

@@ -30,11 +30,17 @@ sub _getsome {
   return () if ((!defined $num_slots) or ($num_slots < 1));
   return () if ((!defined $where) or (ref {} ne ref $where));
 
-  my $rs = schema('netdisco')->resultset('Admin')
-    ->search(
-      { status => 'queued', %$where },
-      { order_by => 'random()', rows => $num_slots },
-    );
+  my $fqdn = hostfqdn || 'localhost';
+  my $jobs = schema('netdisco')->resultset('Admin');
+
+  my $rs = $jobs->search({
+    status => 'queued',
+    device => { '-not_in' => $jobs->correlate('ignored')->search({
+      backend => $fqdn,
+      -or => [{ failures => { '>=', 10 } },{ '-bool' => 'ignore' }],
+    }, { columns => 'device' })->as_query },
+    %$where,
+  }, { order_by => 'random()', rows => $num_slots });
 
   my @returned = ();
   while (my $job = $rs->next) {

share/schema_versions/App-Netdisco-DB-41-42-PostgreSQL.sql

@@ -0,0 +1,12 @@
+BEGIN;
+
+CREATE TABLE "device_ignore" (
+  "backend" text NOT NULL,
+  "device" inet NOT NULL,
+  "action" text NOT NULL,
+  "failures" integer DEFAULT 0,
+  "ignore" boolean DEFAULT false,
+  PRIMARY KEY ("backend", "device", "action")
+);
+
+COMMIT;