[Minor] Add default configs for several modules

3 files changed, 14 insertions, 3 deletions

diff --git a/src/plugins/lua/metadata_exporter.lua b/src/plugins/lua/metadata_exporter.lua
index 6e3f66fa5..90b28193f 100644
--- a/src/plugins/lua/metadata_exporter.lua
+++ b/src/plugins/lua/metadata_exporter.lua
@@ -524,6 +524,9 @@ if type(settings.rules) ~= 'table' then
     rspamd_logger.errx(rspamd_config, 'No push backend enabled')
     return
   end
+elseif not next(settings.rules) then
+  rspamd_logger.debugm(N, rspamd_config, 'No rules enabled')
+  return
 end
 if not settings.rules or not next(settings.rules) then
   rspamd_logger.errx(rspamd_config, 'No rules enabled')
diff --git a/src/plugins/lua/metric_exporter.lua b/src/plugins/lua/metric_exporter.lua
index a7b116c7a..2a2ebb597 100644
--- a/src/plugins/lua/metric_exporter.lua
+++ b/src/plugins/lua/metric_exporter.lua
@@ -144,14 +144,19 @@ local backends = {
 
 local function configure_metric_exporter()
   local opts = rspamd_config:get_all_opt(N)
-  if not backends[opts['backend']] then
-    logger.errx(rspamd_config, 'Backend is invalid or unspecified')
+  local be = opts['backend']
+  if not be then
+    logger.debugm(N, rspamd_config, 'Backend is unspecified')
+    return
+  end
+  if not backends[be] then
+    logger.errx(rspamd_config, 'Backend is invalid: ' .. be)
     return false
   end
   for k, v in pairs(opts) do
     settings[k] = v
   end
-  return backends[opts['backend']]['configure']()
+  return backends[be]['configure']()
 end
 
 if not configure_metric_exporter() then return end
diff --git a/src/plugins/lua/rmilter_headers.lua b/src/plugins/lua/rmilter_headers.lua
index 77eed1785..82a4de6bf 100644
--- a/src/plugins/lua/rmilter_headers.lua
+++ b/src/plugins/lua/rmilter_headers.lua
@@ -322,6 +322,9 @@ local opts = rspamd_config:get_all_opt(N)
 if not opts then return end
 if type(opts['use']) == 'string' then
   opts['use'] = {opts['use']}
+elseif (type(opts['use']) == 'table' and not opts['use'][1]) then
+  logger.debugm(N, rspamd_config, 'no functions are enabled')
+  return
 end
 if type(opts['use']) ~= 'table' then
   logger.errx(rspamd_config, 'unexpected type for "use" option: %s', type(opts['use']))