prometheus-node-exporter-lua: put wifi collector in 2 separate packages

this allow to remove libubus-lua/libiwinfo-lua dependency from main package
this also allow to have different scrape_interval

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

split stations

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

utils/prometheus-node-exporter-lua/Makefile

@@ -12,15 +12,18 @@ PKG_LICENSE:=Apache-2.0
 
 include $(INCLUDE_DIR)/package.mk
 
-define Package/prometheus-node-exporter-lua
+define Package/prometheus-node-exporter-lua/Default
   SECTION:=utils
   CATEGORY:=Utilities
-  TITLE:=Provides system statistics as Prometheus scraping endpoint
-  DEPENDS:=+luasocket +libiwinfo-lua +libubus-lua +lua
-  URL:=https://github.com/rbo/openwrt_exporter
+  TITLE:=Prometheus node exporter
   PKGARCH:=all
 endef
 
+define Package/prometheus-node-exporter-lua
+  $(call Package/prometheus-node-exporter-lua/Default)
+  DEPENDS:=+luasocket +lua
+endef
+
 define Package/prometheus-node-exporter-lua/conffiles
 /etc/config/prometheus-node-exporter-lua
 endef
@@ -31,6 +34,18 @@ define Package/prometheus-node-exporter-lua/description
   This service is a lightweight rewrite in LUA of the offical Prometheus node_exporter.
 endef
 
+define Package/prometheus-node-exporter-lua-wifi
+  $(call Package/prometheus-node-exporter-lua/Default)
+  TITLE+= (wifi collector)
+  DEPENDS:=prometheus-node-exporter-lua +libiwinfo-lua +libubus-lua
+endef
+
+define Package/prometheus-node-exporter-lua-wifi_stations
+  $(call Package/prometheus-node-exporter-lua/Default)
+  TITLE+= (wifi_stations collector)
+  DEPENDS:=prometheus-node-exporter-lua +libiwinfo-lua +libubus-lua
+endef
+
 Build/Compile=
 
 define Package/prometheus-node-exporter-lua/install
@@ -41,7 +56,27 @@ define Package/prometheus-node-exporter-lua/install
 	$(INSTALL_DIR) $(1)/usr/bin
 	$(INSTALL_BIN) ./files/usr/bin/prometheus-node-exporter-lua $(1)/usr/bin/prometheus-node-exporter-lua
 	$(INSTALL_DIR) $(1)/usr/lib/lua/prometheus-collectors
-	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/* $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/cpu.lua         $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/filefd.lua      $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/loadavg.lua     $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/meminfo.lua     $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/nat_traffic.lua $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/netstat.lua     $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/netdev.lua      $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/time.lua        $(1)/usr/lib/lua/prometheus-collectors/
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/uname.lua       $(1)/usr/lib/lua/prometheus-collectors/
+endef
+
+define Package/prometheus-node-exporter-lua-wifi/install
+	$(INSTALL_DIR) $(1)/usr/lib/lua/prometheus-collectors
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/wifi.lua $(1)/usr/lib/lua/prometheus-collectors/
+endef
+
+define Package/prometheus-node-exporter-lua-wifi_stations/install
+	$(INSTALL_DIR) $(1)/usr/lib/lua/prometheus-collectors
+	$(INSTALL_BIN) ./files/usr/lib/lua/prometheus-collectors/wifi_stations.lua $(1)/usr/lib/lua/prometheus-collectors/
 endef
 
 $(eval $(call BuildPackage,prometheus-node-exporter-lua))
+$(eval $(call BuildPackage,prometheus-node-exporter-lua-wifi))
+$(eval $(call BuildPackage,prometheus-node-exporter-lua-wifi_stations))

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

@@ -7,10 +7,6 @@ local function scrape()
   local metric_wifi_network_noise = metric("wifi_network_noise","gauge")
   local metric_wifi_network_signal = metric("wifi_network_signal","gauge")
 
-  local metric_wifi_station_signal = metric("wifi_station_signal","gauge")
-  local metric_wifi_station_tx_packets = metric("wifi_station_tx_packets","gauge")
-  local metric_wifi_station_rx_packets = metric("wifi_station_rx_packets","gauge")
-
   local u = ubus.connect()
   local status = u:call("network.wireless", "status", {})
 
@@ -40,17 +36,6 @@ local function scrape()
       metric_wifi_network_noise(labels, iw.noise(ifname) or 0)
       metric_wifi_network_bitrate(labels, iw.bitrate(ifname) or 0)
       metric_wifi_network_signal(labels, iw.signal(ifname) or -255)
-
-      local assoclist = iw.assoclist(ifname)
-      for mac, station in pairs(assoclist) do
-        local labels = {
-          ifname = ifname,
-          mac = mac,
-        }
-        metric_wifi_station_signal(labels, station.signal)
-        metric_wifi_station_tx_packets(labels, station.tx_packets)
-        metric_wifi_station_rx_packets(labels, station.rx_packets)
-      end
     end
   end
 end

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

@@ -0,0 +1,31 @@
+local ubus = require "ubus"
+local iwinfo = require "iwinfo"
+
+local function scrape()
+  local metric_wifi_station_signal = metric("wifi_station_signal","gauge")
+  local metric_wifi_station_tx_packets = metric("wifi_station_tx_packets","gauge")
+  local metric_wifi_station_rx_packets = metric("wifi_station_rx_packets","gauge")
+
+  local u = ubus.connect()
+  local status = u:call("network.wireless", "status", {})
+
+  for dev, dev_table in pairs(status) do
+    for _, intf in ipairs(dev_table['interfaces']) do
+      local ifname = intf['ifname']
+      local iw = iwinfo[iwinfo.type(ifname)]
+
+      local assoclist = iw.assoclist(ifname)
+      for mac, station in pairs(assoclist) do
+        local labels = {
+          ifname = ifname,
+          mac = mac,
+        }
+        metric_wifi_station_signal(labels, station.signal)
+        metric_wifi_station_tx_packets(labels, station.tx_packets)
+        metric_wifi_station_rx_packets(labels, station.rx_packets)
+      end
+    end
+  end
+end
+
+return { scrape = scrape }