Add vnodes default configuration file. (#14553)

Co-authored-by: ilyam8 <ilya@netdata.cloud>

system/Makefile.am

@@ -27,6 +27,7 @@ dist_config_DATA = \
     .install-type \
     $(NULL)
 
+libconfigvnodesdir=$(libconfigdir)/vnodes
 libsyscrondir=$(libsysdir)/cron
 libsysfreebsddir=$(libsysdir)/freebsd
 libsysfreebsdrcddir=$(libsysfreebsddir)/rc.d
@@ -54,6 +55,11 @@ install-exec-local:
 	$(INSTALL) -d $(DESTDIR)$(libsyssystemddir)
 	$(INSTALL) -d $(DESTDIR)$(libsysopenrcinitddir)
 	$(INSTALL) -d $(DESTDIR)$(libsysopenrcconfddir)
+	$(INSTALL) -d $(DESTDIR)$(libconfigvnodesdir)
+
+dist_libconfigvnodes_DATA = \
+    vnodes/vnodes.conf
+    $(NULL)
 
 libexecnetdatadir=$(libexecdir)/netdata
 nodist_libexecnetdata_SCRIPTS = \

system/vnodes/vnodes.conf

@@ -0,0 +1,23 @@
+## This file is in YAML format.
+##
+## It contains a list of virtual nodes. Virtual node, defined with the following parameters:
+##
+##  1. hostname
+##     The hostname of the virtual node. String. Required.
+##  2. guid
+##     Uniquely identifies the node. String. Required.
+##  3. labels
+##     The virtual node host labels. Dictionary in the form key: value. Optional.
+##     Special labels that are used to set virtual host system information:
+##     https://learn.netdata.cloud/docs/improving-netdata---developers/external-plugins#host_label
+##
+## You can create GUIDs online: https://www.guidgen.com/
+## or generate with the linux command: uuidgen
+##
+## ---------------------------------------------------------------------------------------------------------------------
+
+#- hostname: HOSTNAME1
+#  guid: GUID1
+#
+#- hostname: HOSTNAME2
+#  guid: GUID2