prometheus-node-exporter-lua: add modemmanager exporter

utils/prometheus-node-exporter-lua/Makefile

@@ -4,7 +4,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=prometheus-node-exporter-lua
-PKG_VERSION:=2024.06.16
+PKG_VERSION:=2024.11.09
 PKG_RELEASE:=2
 
 PKG_MAINTAINER:=Etienne CHAMPETIER <[email protected]>
@@ -257,6 +257,17 @@ define Package/prometheus-node-exporter-lua-mwan3/install
 	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/mwan3.lua $(1)/usr/lib/lua/prometheus-collectors/
 endef
 
+define Package/prometheus-node-exporter-lua-modemmanager
+  $(call Package/prometheus-node-exporter-lua/Default)
+  TITLE+= (modemmanager collector)
+  DEPENDS:=prometheus-node-exporter-lua +modemmanager +lua-cjson
+endef
+
+define Package/prometheus-node-exporter-lua-modemmanager/install
+	$(INSTALL_DIR) $(1)/usr/lib/lua/prometheus-collectors
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/modemmanager.lua $(1)/usr/lib/lua/prometheus-collectors/
+endef
+
 $(eval $(call BuildPackage,prometheus-node-exporter-lua))
 $(eval $(call BuildPackage,prometheus-node-exporter-lua-bmx7))
 $(eval $(call BuildPackage,prometheus-node-exporter-lua-dawn))
@@ -276,3 +287,4 @@ $(eval $(call BuildPackage,prometheus-node-exporter-lua-wifi_stations))
 $(eval $(call BuildPackage,prometheus-node-exporter-lua-snmp6))
 $(eval $(call BuildPackage,prometheus-node-exporter-lua-realtek-poe))
 $(eval $(call BuildPackage,prometheus-node-exporter-lua-mwan3))
+$(eval $(call BuildPackage,prometheus-node-exporter-lua-modemmanager))

utils/prometheus-node-exporter-lua/files/usr/lib/lua/prometheus-collectors/modemmanager.lua

@@ -0,0 +1,23 @@
+local cjson = require "cjson"
+
+local function scrape()
+
+  local file = assert(io.popen('mmcli -m any -J --signal-get', 'r'))
+  file:flush()
+  local output = file:read('*all')
+  file:close()
+
+  table = cjson.decode(output)
+
+  for k,v in pairs(table["modem"]["signal"]) do
+    for k2,value in pairs(v) do
+      if ( tonumber(value) ~= nil ) then
+        metricname = "modemmanager_signal_" .. k .. "_" .. k2
+        metric(metricname, "gauge", nil, value)
+      end 
+    end
+  end
+
+end
+
+return { scrape = scrape }