fix arista memory output (#1048)

network/arista/snmp/mode/memory.pm

@@ -31,6 +31,31 @@ sub default_storage_type {
     return '^(hrStorageRam|hrStorageFlashMemory)';
 }
 
+sub set_counters {
+    my ($self, %options) = @_;
+    
+    $self->{maps_counters_type} = [
+        { name => 'storage', type => 1, cb_prefix_output => 'prefix_storage_output', message_multiple => 'All memory spaces are ok' },
+    ];
+    
+    $self->{maps_counters}->{storage} = [
+        { label => 'usage', set => {
+                key_values => [ { name => 'display' }, { name => 'used' }, { name => 'size' }, { name => 'allocation_units' } ],
+                closure_custom_calc => $self->can('custom_usage_calc'),
+                closure_custom_output => $self->can('custom_usage_output'),
+                closure_custom_perfdata => $self->can('custom_usage_perfdata'),
+                closure_custom_threshold_check => $self->can('custom_usage_threshold'),
+            }
+        },
+    ];
+}
+
+sub prefix_storage_output {
+    my ($self, %options) = @_;
+    
+    return "Memory space '" . $options{instance_value}->{display} . "' ";
+}
+
 sub new {
     my ($class, %options) = @_;
     my $self = $class->SUPER::new(package => __PACKAGE__, %options);