virt: Add PluginInstanceFormat none, as default

Fixes #1100

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index d20feae..59247da 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -7139,17 +7139,17 @@ setting B<name>.
 B<address> means use the interface's mac address. This is useful since the
 interface path might change between reboots of a guest or across migrations.
 
-=item B<PluginInstanceFormat> B<name|uuid>
+=item B<PluginInstanceFormat> B<name|uuid|none>
 
 When the virt plugin logs data, it sets the plugin_instance of the collected
-data according to this setting. The default is to use the guest name as provided
-by the hypervisor, which is equal to setting B<name>.
+data according to this setting. The default is to not set the plugin_instance.
 
+B<name> means use the guest's name as provided by the hypervisor.
 B<uuid> means use the guest's UUID.
 
-You can also specify combinations of these fields. For example B<name uuid>
-means to concatenate the guest name and UUID (with a literal colon character
-between, thus I<"foo:1234-1234-1234-1234">).
+You can also specify combinations of the B<name> and B<uuid> fields.
+For example B<name uuid> means to concatenate the guest name and UUID
+(with a literal colon character between, thus I<"foo:1234-1234-1234-1234">).
 
 =back
 

diff --git a/src/virt.c b/src/virt.c
index 663555b..6824b13 100644 (file)
--- a/src/virt.c
+++ b/src/virt.c
@@ -128,7 +128,7 @@ enum plginst_field {
 };
 
 static enum plginst_field plugin_instance_format[PLGINST_MAX_FIELDS] =
-    { plginst_name };
+    { plginst_none };
 
 /* InterfaceFormat. */
 enum if_field {
@@ -449,7 +449,10 @@ lv_config (const char *key, const char *value)
         }
 
         for (i = 0; i < n; ++i) {
-            if (strcasecmp (fields[i], "name") == 0)
+            if (strcasecmp (fields[i], "none") == 0) {
+                plugin_instance_format[i] = plginst_none;
+                break;
+            } else if (strcasecmp (fields[i], "name") == 0)
                 plugin_instance_format[i] = plginst_name;
             else if (strcasecmp (fields[i], "uuid") == 0)
                 plugin_instance_format[i] = plginst_uuid;